US20020029051A1 - Occluding device and method of use - Google Patents
Occluding device and method of use Download PDFInfo
- Publication number
- US20020029051A1 US20020029051A1 US09/468,749 US46874999A US2002029051A1 US 20020029051 A1 US20020029051 A1 US 20020029051A1 US 46874999 A US46874999 A US 46874999A US 2002029051 A1 US2002029051 A1 US 2002029051A1
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- United States
- Prior art keywords
- tubular member
- lumen
- mesh
- body lumen
- contraceptive
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12168—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure
- A61B17/12172—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device having a mesh structure having a pre-set deployed three-dimensional shape
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12159—Solid plugs; being solid before insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F6/00—Contraceptive devices; Pessaries; Applicators therefor
- A61F6/20—Vas deferens occluders; Fallopian occluders
- A61F6/22—Vas deferens occluders; Fallopian occluders implantable in tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F6/00—Contraceptive devices; Pessaries; Applicators therefor
- A61F6/20—Vas deferens occluders; Fallopian occluders
- A61F6/22—Vas deferens occluders; Fallopian occluders implantable in tubes
- A61F6/225—Vas deferens occluders; Fallopian occluders implantable in tubes transcervical
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
- A61B2017/00557—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated inflatable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30092—Properties of materials and coating materials using shape memory or superelastic materials, e.g. nitinol
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
Definitions
- This invention relates to the field of occluding devices and the methods of using such devices, and more particularly to contraceptive and sterilization devices.
- This invention is directed to a device for occluding a body lumen, generally comprising a tubular member, and a mesh member transversely disposed on the tubular member which is permeable to allow for tissue ingrowth.
- the tissue ingrowth produces a tissue impregnated mesh which occludes the body lumen.
- a presently preferred embodiment is a contraceptive or sterilization device for occluding a reproductive tract or lumen to prevent the passage of reproductive cells through the tract or lumen.
- the occluding device of the invention can be used in the fallopian tubes of a female patient, or the vas deferens of a male patient.
- the occluding device of the invention can be used in other body lumens or passageways.
- the occluding device of the invention can be used to repair a cardiac malformation, known as a ventricular septal defect, in which a passageway is formed in the heart wall that separates the right and left ventricles of the heart allowing blood leakage between the two ventricles.
- a cardiac malformation known as a ventricular septal defect
- the occluding device of the invention is secured to the heart wall defining the septal defect, and ingrowth of the myocardium into the device mesh member occludes the passageway to thereby repair the defect.
- atrial septal defects or other passageways in the heart and elsewhere in the body may be occluded using the device of the invention.
- the tubular member has a first end, a second end, and a lumen extending therein.
- the mesh member extends transversely on the tubular member, so that cellular invasion through the mesh member occludes the tubular member lumen and, consequently, the body lumen in which it is installed.
- the mesh member is disposed within the lumen of the tubular member.
- the transversely disposed mesh member may be outside of the tubular member lumen, as for example, where the mesh member comprises an end cap having a peripheral edge connected to an end of the tubular member.
- the tissue impregnated mesh forms an occluding member with improved durability over synthetic occluders, which are more vulnerable to rupture or failure within the body due to their synthetic structures.
- the occluding device is highly flexible which facilitates the introduction and retention of the device within the body lumen.
- the mesh member comprises strands of a material woven or bundled into a permeable structure.
- a permeable structure such as a metal, polymeric material, and organics such as animal tissues, and is preferably reactive to tissue so as to promote the tissue ingrowth into the mesh member.
- the tubular member is at least in part expandable within the body lumen from a first configuration suitable for introduction into the body lumen to a second larger configuration to facilitate securing the expanded tubular member to at least a portion of a wall which defines the body lumen.
- the tubular member has an open or lattice-like framework which allows for the growth of tissue through the openings of the lattice-like framework, so as to interconnect the tubular member and the wall of the body lumen.
- the surface of the tubular member may be treated to promote the tissue ingrowth.
- the occluding device of the invention may be advanced to the desired location within the body lumen by a suitable delivery system, such as a delivery catheter or a conventional balloon catheter similar to those used for delivering stents, aortic grafts and various types of prosthesis.
- a suitable delivery system such as a delivery catheter or a conventional balloon catheter similar to those used for delivering stents, aortic grafts and various types of prosthesis.
- the device is introduced and positioned within the region of the body lumen to be occluded with the tubular member in the first configuration with small transverse dimensions. Once in place, the tubular member is then expanded to the second configuration with transverse dimensions roughly corresponding to or slightly larger than the body lumen, so that the tubular member can be secured to the wall defining the body lumen.
- the tubular member may be self expanding or expanded by mechanical devices or by inflation of the balloon of the balloon catheter. The tubular member will then remain in the open configuration implanted in the body lumen.
- tissue ingrowth, or epithelialization through the open framework of the tubular member secures it to the wall defining the body lumen.
- epithelialization through the mesh member occludes the body lumen.
- Sufficient epithelialization to secure the device to the body wall and occlude the body lumen may take one or more weeks. While the term “epithelialization” is used herein, it should be understood that, depending on the body lumen, tissues such as endothelium or myocardium may be impregnating the device. Additionally, scar tissue formation may take place as well.
- One presently preferred embodiment of the invention comprises a reversible contraceptive system which reversibly occludes the reproductive body lumen.
- the tissue impregnated mesh may be reopened by any number of suitable means.
- the occluding member may be partially or completely cut away using an atherectomy type catheter or laser to create a lumen, and then compressed using a balloon dilatation catheter similar to an angioplasty procedure.
- a plug may be releasably secured to the mesh member, so that the plug may be detached from the tissue impregnated mesh member to reopen the lumen.
- the contraceptive device of the invention can be left in place to effectively block the passageway until the patient wishes to reverse the procedure.
- the contraceptive or sterilization device of the invention provides effective sterilization or contraception for both males and females due to the tissue impregnated mesh member which occludes the reproductive body lumen and which has excellent durability.
- the device remains in place within the reproductive body lumen, and the tissue impregnated mesh member resists degradation or tearing, to thereby decrease the risk of failure of the device.
- the implantation of the device can be performed in a single office visit, using minimally invasive and easily used devices such as hysteroscopes, catheters, guidewires, guiding catheters and the like.
- FIG. 1 is an elevational view of one embodiment of the occluding device of the invention with the tubular member in a contracted configuration.
- FIG. 2 is a transverse cross sectional view of the device shown in FIG. 1, taken along lines 2 - 2 .
- FIG. 3 is an elevational view of the device of the invention shown in FIG. 1, in an expanded configuration.
- FIG. 4 is a transverse cross sectional view of the device shown in FIG. 3, taken along lines 4 - 4 .
- FIG. 5 is an elevational view of another embodiment of the occluding device of the invention having a mesh member comprising bundled strands intermittently spaced in a plurality of sections of the tubular member.
- FIG. 6 is an elevational view of another embodiment of the occluding device of the invention having a mesh member comprising woven strands disposed at the first end of the tubular member.
- FIG. 7 is a transverse view of the mesh member, shown in FIG. 6, comprising woven strands.
- FIG. 8 is a longitudinal cross sectional view of the device shown in FIG. 6, epithelialized in a body lumen.
- FIG. 9 is a transverse cross sectional view of the device shown in FIG. 8, taken along lines 9 - 9 .
- FIG. 10 illustrates another embodiment of the occluding device having a mesh layer on an outer surface of the tubular member, within a body lumen.
- FIG. 11 illustrates the device shown in FIG. 10 in an expanded configuration.
- FIG. 12 is an elevational view, partially in section, of a delivery catheter useful in a method of the invention with a self-expanding occluding device of the invention.
- FIG. 13 is an elevational view, partially in section, of a balloon catheter useful in a method of the invention.
- FIG. 14 illustrates the male reproductive anatomy, and a contraceptive device embodying features of the invention, within the vas deferens.
- FIG. 15 is an enlarged view of the expanded contraceptive device shown in FIG. 14.
- FIG. 16 illustrates the female reproductive anatomy, and a contraceptive device embodying features of the invention, within a fallopian tube.
- FIG. 17 illustrates the device on a balloon catheter within a reproductive tract or body lumen, with the tubular member in a contracted configuration.
- FIG. 18 illustrates the device shown in FIG. 16 within circle 18 , with the device on a balloon catheter within the fallopian tube, with the tubular member in an expanded configuration.
- FIG. 19 is an enlarged, partially in section view of the tubular member shown in FIG. 18 within circle 19 , illustrating the mesh member and mesh layer.
- FIGS. 20 and 21 are elevational views of another embodiment of the tubular member comprising a slotted member, in closed and expanded configurations, respectively.
- FIGS. 22 and 23 are elevational views of another embodiment of the tubular member comprising a coil, in closed and expanded configurations, respectively.
- FIG. 24 is is a transverse cross sectional view of another embodiment of the invention, having a plug releasably secured to the mesh member.
- FIG. 1 illustrates an occluding device 10 embodying features of the invention generally comprising a tubular member 11 having a first end 12 , a second end 13 , and a lumen 14 extending therein.
- a mesh member 15 is transversely disposed on the tubular member.
- occluding device 10 comprises a contraceptive or sterilization device for occluding a reproductive body lumen.
- FIG. 3 illustrates the tubular member 11 shown in FIG. 1 in an open, relatively large dimension configuration.
- FIG. 4 showing a transverse cross section of the tubular member shown in FIG. 3 taken along lines 4 - 4 , the mesh member expands so that it extends across the expanded lumen 14 of the tubular member 11 .
- the tubular member 11 has an open, lattice-type structure facilitating epithelialization which secures the occluding member to the wall defining the body lumen.
- tubular member 11 can be deformed to an expanded diameter, preferably equal to or slightly larger than the dimensions of the body lumen within which the contraceptive device 10 is to be disposed.
- expanded transverse dimensions should be about 0 . 1 mm to about 5 mm.
- the mesh member 15 is permeable to allow for tissue ingrowth.
- the permeability of the mesh member 15 facilitates epithelialization, and the epithelialized mesh occludes the reproductive body lumen sufficiently to prevent the passage of reproductive cells therethrough.
- the mesh member 15 comprises intertwined strands of a biocompatible material connected to the tubular member 11 .
- the mesh member comprises bundled strands.
- the mesh member comprises woven strands.
- FIG. 7 is a transverse view of the device illustrated in FIG. 6, illustrating the woven strands forming the mesh member.
- the mesh member 15 comprises intertwined strands of a biocompatible material connected to the tubular member 11 .
- the mesh member comprises bundled strands.
- the mesh member comprises woven strands.
- FIG. 7 is a transverse view of the device illustrated in FIG. 6, illustrating the woven strands forming the mesh member.
- the mesh member 15 comprises intertwined strands of a
- the mesh member 15 extends along the length of the tubular member 11 from the first end 12 to the second end 13 thereof.
- the mesh member 15 is disposed in a plurality of sections intermittently spaced along the length of the tubular member.
- FIG. 6 illustrates another embodiment, in which the mesh member 15 is disposed at the first end of the tubular member 11 .
- the mesh member comprises a single sheet of woven material, disposed in the lumen of the tubular member 11 .
- a plurality of stacked woven mesh sheets may be provided, including sheets having different mesh sizes.
- the mesh member 15 is within the lumen 14 of the tubular member.
- the mesh member may be connected to the tubular member 11 by a variety of suitable means including adhesive, heat bonding, or solvent bonding.
- FIG. 8 illustrates the embodiment of the contraceptive device 10 shown in FIG. 6, installed within the patient's body lumen 21 , with tissue ingrowth 22 within the walls of the tubular member 11 and within the mesh member 15 .
- FIG. 9 illustrates a transverse cross section of the installed device 10 shown in FIG. 8 taken along lines 9 - 9 .
- the mesh member 15 is an irritant, such as Dacron or Nylon, which promotes epithelialization. Additionally, the mesh member may be coated or otherwise impregnated with cell growth stimulators, hormones, and/or chemicals to enhance tissue impregnation.
- the fibers used to form the mesh member 15 are generally about 0.00025 mm to about 0.25 mm in diameter. It would be obvious that a wide variety of mesh sizes which support epithelialization may be used.
- the mesh member 15 mesh size is about 5 ⁇ m to about 0.05 mm, and preferably about 10 ⁇ m to about 15 ⁇ m.
- mesh members having relatively large mesh sizes are coated with the epithelialization promoter agents.
- a mesh layer 16 is provided along at least a section of the outer surface and/or the inner surface of the tubular member, to facilitate tissue epithelialization along the tubular member 11 and into the mesh member 15 .
- the mesh layer 16 is disposed along the entire length of the outer surface of the tubular member 11 and transversely disposed at the first end 12 of the tubular member.
- the mesh layer may be an integral extension of the mesh member 15 , or a separate member connected to or separate from the mesh member 15 .
- the mesh layer 16 comprises woven or bundled strands of a, preferably, biocompatible material, which may be a single or a plurality of mesh sheets, as discussed above in connection with the mesh member 15 .
- the mesh layer is permeable to allow for tissue ingrowth, and consequently, facilitates ingrowth within the mesh member 15 , as for example, in embodiments in which only a section of the tubular member is expanded into contact with a wall of the body lumen, as discussed below.
- the tubular member 11 may be expanded in the body lumen using a balloon catheter, or alternatively, it may be self expanding.
- the tubular member is preferably self expanding in the embodiment in which the mesh member 15 is disposed along the length of the tubular member, as in the embodiment illustrated in FIG. 1, or is disposed at least in part at the second end of the tubular member, as in the embodiment illustrated in FIG. 5.
- FIG. 12 illustrates a delivery catheter 31 useful in the delivery of the device 10 having self expanding tubular member.
- the delivery catheter 31 generally comprises an elongated shaft 32 having a lumen 33 extending therein.
- the self expanding tubular member 11 may be deformed into the smaller diameter configuration within the lumen 33 of the delivery catheter, and expanded into the larger diameter configuration within the body lumen by longitudinally displacing the tubular member out the distal end of the delivery catheter to thereby remove the radially compressive force of the delivery catheter.
- a pusher 34 slidably received within the lumen of the delivery catheter can be used to longitudinally displace the tubular member 11 out the distal end of the delivery catheter.
- FIG. 13 illustrates a catheter 35 useful in the practice of the invention, which comprises an elongated shaft 36 having an inflation lumen 37 which is in fluid communication with inflatable member 38 mounted on a distal section of the catheter shaft, and adapter 39 on a proximal end of the catheter shaft.
- the tubular member 11 is mounted on the inflatable member 38 , and preferably closely conforms to the diameter of the uninflated inflatable member 38 to facilitate introduction into the desired body lumen
- the tubular member 11 may be deformed to facilitate mounting onto the inflatable member 38 , and is expanded by the inflatable member to an open expanded configuration within a body lumen.
- a guidewire 40 within the catheter lumen may extend through the mesh member 15 , provided the guidewire has a relatively small diameter compared with the mesh size. For example, a conventional guidewire having a diameter of about 0.018 inch or less inch may typically be extended through the mesh member 15 without adversely effecting the mesh member 15 .
- FIG. 14 illustrates the male reproductive anatomy, including the vas deferens 41 in which the contraceptive device 10 of the invention may be installed.
- the expanded tubular member 11 within the vas deferens is illustrated in FIG. 15.
- FIG. 16 illustrates the female reproductive anatomy, including the fallopian tubes 42 in which the contraceptive device 10 is installed.
- the device 10 is shown mounted on the inflatable member 38 of the catheter 35 and positioned within the fallopian tube 42 .
- the practice of the invention comprises the following general steps, with specific reference to the embodiment illustrated in FIG. 16 comprising a contraceptive device 10 for occluding fallopian tubes of a female patient.
- the contraceptive device 10 comprising a tubular member 11 having a relatively small transverse dimension is mounted onto the exterior of balloon 38 of catheter 35 , as shown in FIG. 17, and the catheter 35 is advanced under fluoroscopic, hysteroscopic, or ultrasonic visualization until tubular member 11 is positioned within one of the female patient's fallopian tubes 42 .
- Inflation fluid is introduced through adapter 39 to inflate inflatable member 38 .
- inflation of balloon 38 expands tubular member 11 to an open configuration, lodging it in fallopian tube 42 .
- a section of the tubular member 11 extending from the second end of the tubular member is expanded into contact with the wall defining the fallopian tube 42 .
- at least about 1 ⁇ 3 of the tubular member is expanded into contact with the body lumen wall to securely attach the device 10 within the fallopian tube 42 .
- the inflatable member 38 is deflated, and the catheter 35 is removed, leaving the expanded tubular member 11 implanted in body lumen 42 .
- Another contraceptive device 10 is delivered to the patient's other fallopian tube and expanded therein in the same manner.
- the tubular member 11 may be expanded into position within the vas deferens 41 of a male patient to provide male contraception using the same procedures.
- the contraceptive device 10 may be self expanding as discussed above.
- FIG. 19 illustrates an enlarged, partially in section, view of the first end of the tubular member 11 and mesh member 1 5 therein, shown in FIG. 18 within circle 19 .
- the mesh layer 16 is on the inner and outer surface of the tubular member 11 . Over a period of a week or more epithelial cells lining the lumen will proliferate, growing around the open framework of tubular member 11 and within the mesh member 15 , as shown in FIGS. 8 and 9, thereby securing the expanded tubular member 11 to the wall defining the fallopian tube 42 , and occluding the fallopian tube 42 .
- FIGS. 8 and 9 illustrates an enlarged, partially in section, view of the first end of the tubular member 11 and mesh member 1 5 therein, shown in FIG. 18 within circle 19 .
- the mesh layer 16 is on the inner and outer surface of the tubular member 11 .
- epithelial cells lining the lumen will proliferate, growing around the open framework of tubular member 11 and within the mesh member
- epithelial cells cover the inner and outer surfaces of the tubular member, so that the tubular member is secured to the fallopian tube as an embedded, integral member therein.
- the layer of epithelial tissue that forms within the lattice-like structure of the tubular member 11 and optional mesh layer 16 helps block and seal the lumen so as to prevent the passage of reproductive cells, eggs or sperm cells.
- tubular member 11 may have a number of suitable configurations as shown in schematically in FIGS. 1 , 20 - 23 .
- tubular member 11 comprises a braided tube of wire or ribbon.
- FIGS. 20 and 21 illustrate another embodiment in which tubular member 11 comprises a length of metal tubing 52 , such as hypodermic tubing, having slots.
- FIG. 20 illustrates tubular member 11 in its relatively small dimensioned configuration for introduction and advancement into the patient's body lumen, and FIG. 21 its larger, open configuration. The slots cut into the wall of the tubing allow expansion of the occluding member into the open configuration shown in FIG. 21.
- tubular member 11 is a coil 53 of wire or ribbon. It is obvious that a variety of other suitable configurations may be used for tubular member 11 , such as a number of closed sinusoidal rings of wire or ribbon.
- mechanical, adhesive or other anchoring means may be employed to secure the expanded tubular member to the vessel wall defining the body lumen.
- a stent or prosthetic device to an aortic or arterial wall described in U.S. Pat. No. 4,140,126; U.S. Pat. No. 4,562,596 ; U.S. Pat. No. 4,577,631; U.S. Pat. No. 4,787,899; U.S. Pat. No. 5,104,399; U.S. Pat. No. 5,167,614; U.S. Pat. No. 5,275,622; U.S. Pat. No. 5,456,713; and U.S. Pat. No.
- 5,489,295 may be used with the present invention to interconnect the wall defining the reproductive tract and the tubular member.
- barbs or hooks 54 may be provided on the tubular member 11 .
- the barbs or hooks become imbedded in the wall defining the body lumen as the tubular member is expanded.
- Such anchoring members are especially preferred for use in the fallopian tubes of a female patient, in order to prevent the peristaltic action therein from dislodging the device before the epithelialization of the tubular member 11 .
- the tubular member 11 is formed from metals such as stainless steel, superelastic or shape memory material such as a nickel-titanium (NiTi) alloy such as NITINOL, platinum, tantalum, gold, or rigid or semirigid biocompatible plastics.
- the tubular member is a superelatic material, providing a controlled force on the body lumen during expansion of the tubular member.
- the surface of the tubular member's 11 framework may be designed to facilitate epithelial growth, as by providing the tubular member with an open or lattice-like framework to promote epithelial growth into as well as around the member to ensure secure attachment to, and embodiment within the wall of the body lumen.
- Suitable surface techniques include EDM machining, laser drilling, photo etching, sintering and the like. Additionally, increasing the surface area of the tubular member can also provide greater adhesion for the epithelial tissue. Suitable surface treatments include plasma etching, sand blasting, machining and other treatments to roughen the surface.
- the device may be coated or seeded to spur epithelialization. For example, the device can be coated with a polymer having impregnated therein a drug, enzyme or protein for inducing or promoting epithelial tissue growth.
- the device could be plated with or otherwise incorporate an inflammatory material to produce an inflammatory response in the tissue of the wall defining the body lumen, which further contributes to the obstruction of the lumen.
- the mesh member or mesh layer may incorporate strands or particles of inflammatory material therein.
- the inflammatory material comprises copper or copper alloy.
- Other inflammatory materials, such as radioactive materials, may be suitable as well.
- at least a part of the device, as for example the tubular member could be radioactive, emitting alpha, beta or gamma particles.
- the occlusion of the lumen may be reversed simply by removing the tissue impregnated mesh, as by cutting away using conventional atherectomy devices or lasers.
- a balloon catheter can be used to compress the occluding tissue ingrowth to open up the passageway.
- a balloon catheter can be advanced within the body lumen until the balloon is within the lumen left by the cutting of the tissue impregnated mesh and then the balloon on a catheter is inflated to widen the opening.
- the device 10 further includes a plug 55 releasably secured to the mesh member 15 .
- the plug 55 is secured to the mesh member, as by fusion bonding, biocompatible adhesive, or mechanical connectors, so that the plug may be removed from the implanted device in order to reverse the occlusion of the body lumen by opening up a lumen in the mesh member.
- a variety of suitable materials may be used to form the plug, including metals and plastics.
- the plug may be coated or seeded to spur epithelization, or be formed at least in part of an inflammatory material to produce an inflammatory response as discussed above.
- the plug extends along at least the length of the mesh member, and preferably extends beyond an end of the mesh member.
- the device 10 may be used to occlude a variety of body lumens or passageways.
- a mechanical expandable member such as described in U.S. Pat. No. 4,585,000, which is incorporated herein by reference, may be used to expand the tubular member within the reproductive tract to engage the wall thereof.
- individual features of embodiments of the invention may be shown in some of the drawings and not in others, those skilled in the art will recognize that individual features of one embodiment of the invention can be combined with any or all the features of one or more of the other embodiments.
Abstract
Description
- This invention relates to the field of occluding devices and the methods of using such devices, and more particularly to contraceptive and sterilization devices.
- Conventional contraceptive strategies generally fall within three categories: physical barriers, drugs and surgery. While each have certain advantages, they also suffer from various drawbacks. Barriers such as condoms and diaphragms are subject to failure due to breakage and displacement. Drug strategies, such as the pill and Norplant™, which rely on artificially controlling hormone levels, suffer from known and unknown side-effects from prolonged use. Finally, surgical procedures, such as tubal ligation and vasectomy, involve the costs and attendant risks of surgery, and are frequently not reversible. Thus, there remains a need for a safe, effective method of contraception, particularly a non-surgical method which is reversible.
- This invention is directed to a device for occluding a body lumen, generally comprising a tubular member, and a mesh member transversely disposed on the tubular member which is permeable to allow for tissue ingrowth. The tissue ingrowth produces a tissue impregnated mesh which occludes the body lumen. A presently preferred embodiment is a contraceptive or sterilization device for occluding a reproductive tract or lumen to prevent the passage of reproductive cells through the tract or lumen. For example, the occluding device of the invention can be used in the fallopian tubes of a female patient, or the vas deferens of a male patient. However, the occluding device of the invention can be used in other body lumens or passageways. For example, the occluding device of the invention can be used to repair a cardiac malformation, known as a ventricular septal defect, in which a passageway is formed in the heart wall that separates the right and left ventricles of the heart allowing blood leakage between the two ventricles. Thus, the occluding device of the invention is secured to the heart wall defining the septal defect, and ingrowth of the myocardium into the device mesh member occludes the passageway to thereby repair the defect. Similarly, atrial septal defects or other passageways in the heart and elsewhere in the body may be occluded using the device of the invention.
- In accordance with the invention, the tubular member has a first end, a second end, and a lumen extending therein. The mesh member extends transversely on the tubular member, so that cellular invasion through the mesh member occludes the tubular member lumen and, consequently, the body lumen in which it is installed. In a presently preferred embodiment, the mesh member is disposed within the lumen of the tubular member. However, the transversely disposed mesh member may be outside of the tubular member lumen, as for example, where the mesh member comprises an end cap having a peripheral edge connected to an end of the tubular member. The tissue impregnated mesh forms an occluding member with improved durability over synthetic occluders, which are more vulnerable to rupture or failure within the body due to their synthetic structures. Moreover, the occluding device is highly flexible which facilitates the introduction and retention of the device within the body lumen.
- In a presently preferred embodiment, the mesh member comprises strands of a material woven or bundled into a permeable structure. However, other suitable permeable structures may be used, including a porous membranal structure which allows for tissue ingrowth. The mesh member is formed from a biocompatible material, such as a metal, polymeric material, and organics such as animal tissues, and is preferably reactive to tissue so as to promote the tissue ingrowth into the mesh member.
- Preferably, the tubular member is at least in part expandable within the body lumen from a first configuration suitable for introduction into the body lumen to a second larger configuration to facilitate securing the expanded tubular member to at least a portion of a wall which defines the body lumen. In one presently preferred embodiment, the tubular member has an open or lattice-like framework which allows for the growth of tissue through the openings of the lattice-like framework, so as to interconnect the tubular member and the wall of the body lumen. The surface of the tubular member may be treated to promote the tissue ingrowth.
- The occluding device of the invention may be advanced to the desired location within the body lumen by a suitable delivery system, such as a delivery catheter or a conventional balloon catheter similar to those used for delivering stents, aortic grafts and various types of prosthesis. The device is introduced and positioned within the region of the body lumen to be occluded with the tubular member in the first configuration with small transverse dimensions. Once in place, the tubular member is then expanded to the second configuration with transverse dimensions roughly corresponding to or slightly larger than the body lumen, so that the tubular member can be secured to the wall defining the body lumen. The tubular member may be self expanding or expanded by mechanical devices or by inflation of the balloon of the balloon catheter. The tubular member will then remain in the open configuration implanted in the body lumen.
- With the open, lattice-like framework of the tubular member expanded within the body lumen, tissue ingrowth, or epithelialization, through the open framework of the tubular member secures it to the wall defining the body lumen. At the same time, epithelialization through the mesh member occludes the body lumen. Sufficient epithelialization to secure the device to the body wall and occlude the body lumen may take one or more weeks. While the term “epithelialization” is used herein, it should be understood that, depending on the body lumen, tissues such as endothelium or myocardium may be impregnating the device. Additionally, scar tissue formation may take place as well.
- One presently preferred embodiment of the invention comprises a reversible contraceptive system which reversibly occludes the reproductive body lumen. The tissue impregnated mesh may be reopened by any number of suitable means. For example, the occluding member may be partially or completely cut away using an atherectomy type catheter or laser to create a lumen, and then compressed using a balloon dilatation catheter similar to an angioplasty procedure. Alternatively, a plug may be releasably secured to the mesh member, so that the plug may be detached from the tissue impregnated mesh member to reopen the lumen. Thus, the contraceptive device of the invention can be left in place to effectively block the passageway until the patient wishes to reverse the procedure.
- The contraceptive or sterilization device of the invention provides effective sterilization or contraception for both males and females due to the tissue impregnated mesh member which occludes the reproductive body lumen and which has excellent durability. The device remains in place within the reproductive body lumen, and the tissue impregnated mesh member resists degradation or tearing, to thereby decrease the risk of failure of the device. Moreover, the implantation of the device can be performed in a single office visit, using minimally invasive and easily used devices such as hysteroscopes, catheters, guidewires, guiding catheters and the like. These and other advantages of the invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying exemplary drawings.
- FIG. 1 is an elevational view of one embodiment of the occluding device of the invention with the tubular member in a contracted configuration.
- FIG. 2 is a transverse cross sectional view of the device shown in FIG. 1, taken along lines2-2.
- FIG. 3 is an elevational view of the device of the invention shown in FIG. 1, in an expanded configuration.
- FIG. 4 is a transverse cross sectional view of the device shown in FIG. 3, taken along lines4-4.
- FIG. 5 is an elevational view of another embodiment of the occluding device of the invention having a mesh member comprising bundled strands intermittently spaced in a plurality of sections of the tubular member.
- FIG. 6 is an elevational view of another embodiment of the occluding device of the invention having a mesh member comprising woven strands disposed at the first end of the tubular member.
- FIG. 7 is a transverse view of the mesh member, shown in FIG. 6, comprising woven strands.
- FIG. 8 is a longitudinal cross sectional view of the device shown in FIG. 6, epithelialized in a body lumen.
- FIG. 9 is a transverse cross sectional view of the device shown in FIG. 8, taken along lines9-9.
- FIG. 10 illustrates another embodiment of the occluding device having a mesh layer on an outer surface of the tubular member, within a body lumen.
- FIG. 11 illustrates the device shown in FIG. 10 in an expanded configuration.
- FIG. 12 is an elevational view, partially in section, of a delivery catheter useful in a method of the invention with a self-expanding occluding device of the invention.
- FIG. 13 is an elevational view, partially in section, of a balloon catheter useful in a method of the invention.
- FIG. 14 illustrates the male reproductive anatomy, and a contraceptive device embodying features of the invention, within the vas deferens.
- FIG. 15 is an enlarged view of the expanded contraceptive device shown in FIG. 14.
- FIG. 16 illustrates the female reproductive anatomy, and a contraceptive device embodying features of the invention, within a fallopian tube.
- FIG. 17 illustrates the device on a balloon catheter within a reproductive tract or body lumen, with the tubular member in a contracted configuration.
- FIG. 18 illustrates the device shown in FIG. 16 within
circle 18, with the device on a balloon catheter within the fallopian tube, with the tubular member in an expanded configuration. - FIG. 19 is an enlarged, partially in section view of the tubular member shown in FIG. 18 within
circle 19, illustrating the mesh member and mesh layer. - FIGS. 20 and 21 are elevational views of another embodiment of the tubular member comprising a slotted member, in closed and expanded configurations, respectively.
- FIGS. 22 and 23 are elevational views of another embodiment of the tubular member comprising a coil, in closed and expanded configurations, respectively.
- FIG. 24 is is a transverse cross sectional view of another embodiment of the invention, having a plug releasably secured to the mesh member.
- FIG. 1 illustrates an occluding
device 10 embodying features of the invention generally comprising atubular member 11 having afirst end 12, asecond end 13, and alumen 14 extending therein. As best shown in FIG. 2, illustrating a transverse cross section of the tubular member shown in FIG. 1 taken along lines 2-2, amesh member 15 is transversely disposed on the tubular member. In a presently preferred embodiment, occludingdevice 10 comprises a contraceptive or sterilization device for occluding a reproductive body lumen. - In the embodiment illustrated in FIGS. 1 and 2, the
tubular member 11 is in its relatively small dimensioned configuration for introduction and advancement into the patient's body lumen. FIG. 3 illustrates thetubular member 11 shown in FIG. 1 in an open, relatively large dimension configuration. As illustrated in FIG. 4, showing a transverse cross section of the tubular member shown in FIG. 3 taken along lines 4-4, the mesh member expands so that it extends across the expandedlumen 14 of thetubular member 11. In this configuration thetubular member 11 has an open, lattice-type structure facilitating epithelialization which secures the occluding member to the wall defining the body lumen. Preferably,tubular member 11 can be deformed to an expanded diameter, preferably equal to or slightly larger than the dimensions of the body lumen within which thecontraceptive device 10 is to be disposed. For disposition within a female patient's fallopian tubes the expanded transverse dimensions should be about 0.1 mm to about 5 mm. - The
mesh member 15 is permeable to allow for tissue ingrowth. The permeability of themesh member 15 facilitates epithelialization, and the epithelialized mesh occludes the reproductive body lumen sufficiently to prevent the passage of reproductive cells therethrough. In a presently preferred embodiment, themesh member 15 comprises intertwined strands of a biocompatible material connected to thetubular member 11. In the embodiment illustrated in FIG. 1, the mesh member comprises bundled strands. In the embodiment illustrated in FIG. 6 the mesh member comprises woven strands. FIG. 7 is a transverse view of the device illustrated in FIG. 6, illustrating the woven strands forming the mesh member. However, themesh member 15 may comprise a variety of suitable permeable structures which support epithelialization, as for example, where the mesh member comprises the walls of thetubular member 11 connected together to form a closed end of the tubular member (not shown). - In the embodiment illustrated in FIG. 1, the
mesh member 15 extends along the length of thetubular member 11 from thefirst end 12 to thesecond end 13 thereof. In another embodiment, illustrated in FIG. 5, themesh member 15 is disposed in a plurality of sections intermittently spaced along the length of the tubular member. FIG. 6 illustrates another embodiment, in which themesh member 15 is disposed at the first end of thetubular member 11. In the embodiment illustrated in FIG. 6, the mesh member comprises a single sheet of woven material, disposed in the lumen of thetubular member 11. Alternatively, a plurality of stacked woven mesh sheets may be provided, including sheets having different mesh sizes. In the embodiments illustrated in FIGS. 1, 5 and 6, themesh member 15 is within thelumen 14 of the tubular member. The mesh member may be connected to thetubular member 11 by a variety of suitable means including adhesive, heat bonding, or solvent bonding. - The
tubular member 11, expanded within the body lumen to be occluded, epithelializes to secure thecontraceptive device 10 within the body lumen, and tissue ingrowth in themesh member 15 occludes the lumen of the tubular member and the body lumen. FIG. 8 illustrates the embodiment of thecontraceptive device 10 shown in FIG. 6, installed within the patient'sbody lumen 21, withtissue ingrowth 22 within the walls of thetubular member 11 and within themesh member 15. FIG. 9 illustrates a transverse cross section of the installeddevice 10 shown in FIG. 8 taken along lines 9-9. - A variety of materials may be used to form the
mesh member 15, including plastics, polymers, metals, and treated animal tissues. In a presently preferred embodiment, themesh member 15 is an irritant, such as Dacron or Nylon, which promotes epithelialization. Additionally, the mesh member may be coated or otherwise impregnated with cell growth stimulators, hormones, and/or chemicals to enhance tissue impregnation. The fibers used to form themesh member 15 are generally about 0.00025 mm to about 0.25 mm in diameter. It would be obvious that a wide variety of mesh sizes which support epithelialization may be used. For example, in one embodiment themesh member 15 mesh size is about 5 μm to about 0.05 mm, and preferably about 10 μm to about 15 μm. Preferably, mesh members having relatively large mesh sizes are coated with the epithelialization promoter agents. - In one embodiment, illustrated in FIG. 10, a
mesh layer 16 is provided along at least a section of the outer surface and/or the inner surface of the tubular member, to facilitate tissue epithelialization along thetubular member 11 and into themesh member 15. In the embodiment illustrated in FIG. 10, themesh layer 16 is disposed along the entire length of the outer surface of thetubular member 11 and transversely disposed at thefirst end 12 of the tubular member. The mesh layer may be an integral extension of themesh member 15, or a separate member connected to or separate from themesh member 15. In a presently preferred embodiment, themesh layer 16 comprises woven or bundled strands of a, preferably, biocompatible material, which may be a single or a plurality of mesh sheets, as discussed above in connection with themesh member 15. The mesh layer is permeable to allow for tissue ingrowth, and consequently, facilitates ingrowth within themesh member 15, as for example, in embodiments in which only a section of the tubular member is expanded into contact with a wall of the body lumen, as discussed below. - The
tubular member 11 may be expanded in the body lumen using a balloon catheter, or alternatively, it may be self expanding. The tubular member is preferably self expanding in the embodiment in which themesh member 15 is disposed along the length of the tubular member, as in the embodiment illustrated in FIG. 1, or is disposed at least in part at the second end of the tubular member, as in the embodiment illustrated in FIG. 5. - FIG. 12 illustrates a
delivery catheter 31 useful in the delivery of thedevice 10 having self expanding tubular member. Thedelivery catheter 31 generally comprises anelongated shaft 32 having a lumen 33 extending therein. The self expandingtubular member 11 may be deformed into the smaller diameter configuration within the lumen 33 of the delivery catheter, and expanded into the larger diameter configuration within the body lumen by longitudinally displacing the tubular member out the distal end of the delivery catheter to thereby remove the radially compressive force of the delivery catheter. Apusher 34 slidably received within the lumen of the delivery catheter can be used to longitudinally displace thetubular member 11 out the distal end of the delivery catheter. - Similarly, in the embodiment illustrated in FIG. 6 in which the
mesh member 15 is disposed primarily in the first end of the tubular member, the tubular member may be expanded using a balloon catheter inserted into the open second end of the tubular member. FIG. 13 illustrates acatheter 35 useful in the practice of the invention, which comprises anelongated shaft 36 having aninflation lumen 37 which is in fluid communication withinflatable member 38 mounted on a distal section of the catheter shaft, andadapter 39 on a proximal end of the catheter shaft. Thetubular member 11 is mounted on theinflatable member 38, and preferably closely conforms to the diameter of the uninflatedinflatable member 38 to facilitate introduction into the desired body lumen Thetubular member 11 may be deformed to facilitate mounting onto theinflatable member 38, and is expanded by the inflatable member to an open expanded configuration within a body lumen. Aguidewire 40 within the catheter lumen may extend through themesh member 15, provided the guidewire has a relatively small diameter compared with the mesh size. For example, a conventional guidewire having a diameter of about 0.018 inch or less inch may typically be extended through themesh member 15 without adversely effecting themesh member 15. - FIG. 14 illustrates the male reproductive anatomy, including the vas deferens41 in which the
contraceptive device 10 of the invention may be installed. The expandedtubular member 11 within the vas deferens is illustrated in FIG. 15. FIG. 16 illustrates the female reproductive anatomy, including thefallopian tubes 42 in which thecontraceptive device 10 is installed. In FIG. 16, thedevice 10 is shown mounted on theinflatable member 38 of thecatheter 35 and positioned within thefallopian tube 42. - The practice of the invention comprises the following general steps, with specific reference to the embodiment illustrated in FIG. 16 comprising a
contraceptive device 10 for occluding fallopian tubes of a female patient. Thecontraceptive device 10 comprising atubular member 11 having a relatively small transverse dimension is mounted onto the exterior ofballoon 38 ofcatheter 35, as shown in FIG. 17, and thecatheter 35 is advanced under fluoroscopic, hysteroscopic, or ultrasonic visualization untiltubular member 11 is positioned within one of the female patient'sfallopian tubes 42. Inflation fluid is introduced throughadapter 39 to inflateinflatable member 38. As shown in FIG. 18, inflation ofballoon 38 expandstubular member 11 to an open configuration, lodging it infallopian tube 42. In the embodiment illustrated in FIG. 18, a section of thetubular member 11 extending from the second end of the tubular member, is expanded into contact with the wall defining thefallopian tube 42. In a presently preferred embodiment, at least about ⅓ of the tubular member is expanded into contact with the body lumen wall to securely attach thedevice 10 within thefallopian tube 42. Theinflatable member 38 is deflated, and thecatheter 35 is removed, leaving the expandedtubular member 11 implanted inbody lumen 42. Anothercontraceptive device 10 is delivered to the patient's other fallopian tube and expanded therein in the same manner. Similarly, thetubular member 11 may be expanded into position within the vas deferens 41 of a male patient to provide male contraception using the same procedures. Alternatively, thecontraceptive device 10 may be self expanding as discussed above. - FIG. 19 illustrates an enlarged, partially in section, view of the first end of the
tubular member 11 and mesh member 1 5 therein, shown in FIG. 18 withincircle 19. In the embodiment illustrated in FIG. 19, themesh layer 16 is on the inner and outer surface of thetubular member 11. Over a period of a week or more epithelial cells lining the lumen will proliferate, growing around the open framework oftubular member 11 and within themesh member 15, as shown in FIGS. 8 and 9, thereby securing the expandedtubular member 11 to the wall defining thefallopian tube 42, and occluding thefallopian tube 42. In the embodiment illustrated in FIGS. 8 and 9, epithelial cells cover the inner and outer surfaces of the tubular member, so that the tubular member is secured to the fallopian tube as an embedded, integral member therein. The layer of epithelial tissue that forms within the lattice-like structure of thetubular member 11 andoptional mesh layer 16 helps block and seal the lumen so as to prevent the passage of reproductive cells, eggs or sperm cells. - The tubular member may have a number of suitable configurations as shown in schematically in FIGS.1, 20-23. In the embodiment illustrated in FIG. 1,
tubular member 11 comprises a braided tube of wire or ribbon. FIGS. 20 and 21 illustrate another embodiment in whichtubular member 11 comprises a length ofmetal tubing 52, such as hypodermic tubing, having slots. FIG. 20 illustratestubular member 11 in its relatively small dimensioned configuration for introduction and advancement into the patient's body lumen, and FIG. 21 its larger, open configuration. The slots cut into the wall of the tubing allow expansion of the occluding member into the open configuration shown in FIG. 21. Likewise, in FIGS. 22 and 23,tubular member 11 is acoil 53 of wire or ribbon. It is obvious that a variety of other suitable configurations may be used fortubular member 11, such as a number of closed sinusoidal rings of wire or ribbon. - In still other embodiments, mechanical, adhesive or other anchoring means may be employed to secure the expanded tubular member to the vessel wall defining the body lumen. For example, the means to secure a stent or prosthetic device to an aortic or arterial wall described in U.S. Pat. No. 4,140,126; U.S. Pat. No. 4,562,596 ; U.S. Pat. No. 4,577,631; U.S. Pat. No. 4,787,899; U.S. Pat. No. 5,104,399; U.S. Pat. No. 5,167,614; U.S. Pat. No. 5,275,622; U.S. Pat. No. 5,456,713; and U.S. Pat. No. 5,489,295 may be used with the present invention to interconnect the wall defining the reproductive tract and the tubular member. These patents are incorporated herein in their entireties by reference. For example, barbs or hooks54, as illustrated in FIG. 21, may be provided on the
tubular member 11. The barbs or hooks become imbedded in the wall defining the body lumen as the tubular member is expanded. Such anchoring members are especially preferred for use in the fallopian tubes of a female patient, in order to prevent the peristaltic action therein from dislodging the device before the epithelialization of thetubular member 11. - The
tubular member 11 is formed from metals such as stainless steel, superelastic or shape memory material such as a nickel-titanium (NiTi) alloy such as NITINOL, platinum, tantalum, gold, or rigid or semirigid biocompatible plastics. In a presently preferred embodiment, the tubular member is a superelatic material, providing a controlled force on the body lumen during expansion of the tubular member. The surface of the tubular member's 11 framework may be designed to facilitate epithelial growth, as by providing the tubular member with an open or lattice-like framework to promote epithelial growth into as well as around the member to ensure secure attachment to, and embodiment within the wall of the body lumen. Suitable surface techniques include EDM machining, laser drilling, photo etching, sintering and the like. Additionally, increasing the surface area of the tubular member can also provide greater adhesion for the epithelial tissue. Suitable surface treatments include plasma etching, sand blasting, machining and other treatments to roughen the surface. In other embodiments, the device may be coated or seeded to spur epithelialization. For example, the device can be coated with a polymer having impregnated therein a drug, enzyme or protein for inducing or promoting epithelial tissue growth. In yet another refinement, at least part of the device, as for example the tubular member or the mesh layer, could be plated with or otherwise incorporate an inflammatory material to produce an inflammatory response in the tissue of the wall defining the body lumen, which further contributes to the obstruction of the lumen. For example, the mesh member or mesh layer may incorporate strands or particles of inflammatory material therein. In one embodiment the inflammatory material comprises copper or copper alloy. Other inflammatory materials, such as radioactive materials, may be suitable as well. For example, at least a part of the device, as for example the tubular member, could be radioactive, emitting alpha, beta or gamma particles. - The occlusion of the lumen may be reversed simply by removing the tissue impregnated mesh, as by cutting away using conventional atherectomy devices or lasers. Additionally, a balloon catheter can be used to compress the occluding tissue ingrowth to open up the passageway. For example, if a passageway larger than the passageway cut into the tissue impregnated mesh is desired, a balloon catheter can be advanced within the body lumen until the balloon is within the lumen left by the cutting of the tissue impregnated mesh and then the balloon on a catheter is inflated to widen the opening. In an alternative embodiment illustrated in FIG. 24, the
device 10 further includes aplug 55 releasably secured to themesh member 15. Theplug 55 is secured to the mesh member, as by fusion bonding, biocompatible adhesive, or mechanical connectors, so that the plug may be removed from the implanted device in order to reverse the occlusion of the body lumen by opening up a lumen in the mesh member. A variety of suitable materials may be used to form the plug, including metals and plastics. The plug may be coated or seeded to spur epithelization, or be formed at least in part of an inflammatory material to produce an inflammatory response as discussed above. The plug extends along at least the length of the mesh member, and preferably extends beyond an end of the mesh member. - Various modifications and improvements may be made to the present invention without departing from the scope thereof. For example, while the invention has been discussed primarily in terms of occluding a reproductive body lumen, the
device 10 may be used to occlude a variety of body lumens or passageways. A mechanical expandable member such as described in U.S. Pat. No. 4,585,000, which is incorporated herein by reference, may be used to expand the tubular member within the reproductive tract to engage the wall thereof. Moreover, although individual features of embodiments of the invention may be shown in some of the drawings and not in others, those skilled in the art will recognize that individual features of one embodiment of the invention can be combined with any or all the features of one or more of the other embodiments.
Claims (42)
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US11/116,480 US20050217680A1 (en) | 1996-12-18 | 2005-04-28 | Occluding device and method of use |
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US08/770,123 US7073504B2 (en) | 1996-12-18 | 1996-12-18 | Contraceptive system and method of use |
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US12/172,807 Expired - Fee Related US8707957B2 (en) | 1996-12-18 | 2008-07-14 | Contraceptive system and method of use |
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