|Publication number||US3794041 A|
|Publication date||Feb 26, 1974|
|Filing date||Nov 30, 1971|
|Priority date||Nov 30, 1971|
|Publication number||US 3794041 A, US 3794041A, US-A-3794041, US3794041 A, US3794041A|
|Inventors||Frei E, Yerushalmi S|
|Original Assignee||Yeda Res & Dev|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Non-Patent Citations (1), Referenced by (118), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [191 Frei et a1.
[ Feb. 26, 1974 GASTROINTESTINAL CATHETER  Inventors: Ephraim H. Frei; Shmuel Yerushalmi, both of Rehovot, Israel  Assignee: Yeda Research and Development Co.
Ltd., Rehovot, Israel 22 Filed: Nov. 30, 1971 21 App]. No.: 203,138
 US. Cl. 128/348, l28/l.3, 128/2 M  Int. Cl A6lm 25/00  Field of Search. 128/2 M, 205 R, 1.3, 1.4, 4-6, 128/7, 8, 303 R, 348, 349 R, 350 R, 356;
 References Cited UNITED STATES PATENTS 3,674,014 7/1972 Tillander 128/348 X 3,043,309 7/1962 McCarthy 128/348 2,863,458 12/1958 Modny et al 128/303 R 3,206,657 9/1965 Moriya 335/303 FOREIGN PATENTS OR APPLICATIONS 1,261,276 2/1968 Germany 128/6 OTHER PUBLICATIONS Frei et al., Med. Res. Engr. Fourth Quar. 1966, pp. 1 l-l 8 Primary Examiner-Dalton L. Truluck  ABSTRACT A gastrointestinal catheter of elongated shape, flexible and including ferromagnetic material enabling it, when inserted into the cavity of a body part, to be attracted by a magnet external of the body in order to manipulate the body part with the catheter. In the described embodiments, the ferromagnetic material is in the form of beads enclosed within a tube of inert resilient material, or strung on a string and coated with inert material.
2 Claims, 3 Drawing Figures GASTROINTESTINAL CATHETER BACKGROUND OF THE INVENTION The present invention relates to catheters insertable into a body cavity, and particularly to gastrointestinal catheters for insertion into a part of the intestinal tract, such as the intestines.
In certain types of disease, the only effective treatment consists of massive irradiation of the afflicted organ. This applies to many cases of carcinoma of the cervix, of the bladder, of the ovary and of the uterus, and also in similar diseases. One of the most serious problems of such treatment is the high sensitivity of the intestines to radiation damage, which seems to be due to the continuous shedding by the small bowel cells of its lining, and to the considerable mitotic activity of this organ.
BRIEF SUMMARY OF THE INVENTION In order to make possible a massive irradiation of the afflicted organs, while at the same time avoiding excessive irradiation of the radiation-sensitive intestines, and especially the small bowel, means are provided according to the present invention for moving the intestines out of the path of the radiation when same is used for irradiating the afflicted organs. The device according to the invention is a special catheter which is inserted into the intestines before the radiation treatment, which can be left in place for some time in this position, and which makes it possible to move the intestine out of the path of the irradiating beam.
The novel catheter made in accordance with the invention is flexible and of elongated shape, and includes ferromagnetic material enabling it, when inserted into the cavity of the body part, such as the intestine, to be attracted by a magnet external of the body, in order to manipulate the catheter and the body part therewith.
Preferably, the ferromagnetic material is in the form of beads.
In one described embodiment, the ferromagnetic beads are enclosed within a tube of inert resilient material, and in another described embodiment they are strung on a flexible core, such as string, the beads being coated with inert material.
Further features and advantageous of the invention will be apparent from the description below.
BRIEF DESCRIPTION OF THE DRAWINGS The invention is herewith described, by way of example only, with reference to the accompanying drawings, wherein:
FIG. 1 is a longitudinal sectional view of a part of a catheter constructed in accordance with the invention;
FIG. 2 illustrates a variation in the catheter construction of FIG. 1; and
FIG. 3 illustrates another form of catheter constructed in accordance with the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates a catheter particularly for insertion into the intestines for moving the intestines out of the path of radiation when the same is used for irradiating an afflicted organ The catheter of FIG. 1 includes. a hollow tube 2 of inert resilient material and a plurality of members or beads 4 of iron or other ferromagnetic material.
The length of the catheter is about one to several meters, and its diameter is between 3 to 8 mm. The tubing 2 is of a biologically acceptable material of adequate resilience, such as latex, silicon rubber or the like, of adequate wall-thickness to provide some degree of rigidity, yet supple enough to make it possible to follow the turns and bends of the intestines when inserted in same. A wall thickness of about 0.3 mm to L0 mm has proved satisfactory both for silicon rubber and for natural latex tubing.
Within the tubing there is provided the plurality of spherical or ellipsoid ferromagnetic beads 4 adapted to be strongly attracted by a magnet. The outer diameter of these beadsis chosen in such manner that they are held in place by the resiliency of the tube 2. It has been found that best results are obtained with oblong, ellipsoidal beads having a ratio of radii of about 1:2.
The ratio of magnetisation to the magnetic field applied shows that for prolate ellipsoids the best results are at a ratio of 1:2, as indicated above. With ellipsoids of very elongated shape there is a substantial torque, and this is a drawback for the intended use. No problem of torque exists of course with spherical beads.
Very good results were obtained with iron ellipsoids of a ratio of radii of about 1:2 of about 5 mm small diameter, inserted in a tube of 7 mm outer diameter, of 1 mm wall-thickness, and of 2 meter length.
According to a further embodiment of the invention as shown in FIG. 2; the external tube 12 includes a sequence of such iron beads 14 alternating with beads 16 of similar shape but of plastic material. The beads are positioned close to each other in the tube and some space is left if desired between the beads in order to facilitate the bending of the tube. It is of course possible to use any desired sequence of ferromagnetic beads 14 and of plastic beads 16, and also to use such beads of slightly different radius or shape.
According to a further embodiment of the invention as illustrated in FIG. 3, the catheter comprises a plurality of ferromagnetic beads 24 (if desired in a sequence with beads of plastic material) of spherical or ellipsoid shape strung on a suitable core 28 of string of adequate strength. Core 28 may also be a rod or hollow member of plastic or the like of small diameter. The most simple, yet satisfactory material for the spherical or ellipsoid beads is soft iron, and this is advantageously coated with a coating of plastic material 30 which is inert towards the environment of the gastrointestinal tract and which is biologically acceptable. The plastic coating 30 also reduces or eliminates the danger due to secondary radiation which may result from the incidence of primary radiation on the ferromagnetic beads, if the catheter or part of it remains in the path of the primary radiation used for the treatment of the patient.
The foregoing constructions provide an optimum of flexibility, while at the same time avoiding a bunching together of several members of the chain-like structure, either due to the peristaltic movement or due to the combination of the peristaltic movement together with the influence of the external magnetic force used to move the part of the intestine into which the catheter is inserted from the path of the radiation used for treatment.
First experiments were made by the direct introduction of ferrite powder into the intestines of a dog. This experiment proved that it is feasible to move the intestines by the application of an external magnetic field on the ferrite contained in same. The loops of the intestines could thus be moved sufficiently for the intended results.
After having proved the feasibility of such movement, experiments were continued with gastrointestinal catheters made of ferromagnetic beads. In animal experiments the catheter was inserted and soft X-rays to about 40 KV were used for monitoring the movement of the intestinal loops due to the application of an external magnetic field on such catheter. With guinea pigs a loop of the intestine was moved by means of an external horseshoe magnet and pulled towards the magnet in such manner that the external skin was raised appreciably and pulled into the gap of the horseshoe magnet. The animal was drugged and maintained in this position for hours after which the magnet and the catheter were removed. Histological examination showed no damage to the intestinal tissue. The natural movement of the material in the intestines was not affected by the presence of the catheter.
Further experiments were carried out with dogs. A catheter according to FIG. 1 and comprising a plurality of iron beads of ellipsoidal shape of 1:2 ratio of radii of 3 mm diameter (small radius) in a silicon rubber tubing of 0.6 mm wall thickness was inserted through the mouth or via a small incision made in the small intestine. When a magnetic field was applied from the outside of the body by means of a magnet having a field strength of 6,000 oersted at the face of the magnet, with a 2-inch iron core diameter, this moved the catheter together with the intestine for a sufficient distance.
Similar experiments were made with the FIG. 3 form of the catheter, consisting of a plurality of plasticcoated iron ellipsoids strung on a suitable string, and satisfactory results were obtained.
A number of experiments were carried out with humans. A gastrointestinal catheter according to the FIG. 1 form of 1 meter length and 3-7 mm outer diameter of the tubing ensheathing the iron beads, was inserted into the intestines. The application of a magnetic field from outside the body, of about 6 K-oersted moved the catheter and the loop of the intestine in the desired direction.
In the FIG. 3 form, the provision of a coating 30 of plastic, such as polyethylene or the like, of adequate thickness, on the iron beads prevents any secondary radiation from damaging the intestines, if the catheter is in part in the path of the radiation used for the treatment. In practice it is advisable to examine the patient by X-rays prior to the radiation treatment in order to ascertain that the loop or loops of the intestine, together with the catheter inserted thereinto, have been moved away.
In guinea pig experiments Alnico 5 magnets were used as the external magnets for attracting the catheter and the body part therein. With humans it is advisable to use superconducting magnets of great field strength and comparatively small size.
Catheters of about 4-7 mm outer diameter may be left in the intestines for quite prolonged periods without any adverse effect. Examinations carried out after 10 days showed that no damage was caused by the catheter and that it did not interfere with the natural body activities. During such prolonged periods it is possible to carry out an intensive radiation treatment.
It is clear that the above description is by way of example only and that many modifications, changes and other applications of the catheters described may be made.
What is claimed is:
1. Magnetic apparatus insertable into a body cavity, for displacement of internal body organs from a region of applied radiation by means of a magnet disposed externally of the body, characterized in that it is of elongated shape, flexible and includes an elongated flexible tubular member of substantially inert resilient biologically acceptable material;
a plurality of ellipsoidal beads of soft iron having major and minor axes substantially in a 2:1 ratio respectively, axially disposed with their major axes parallel to the longitudinal axis of said tubular member and in closely adjacent spaced relationship therein over a substantial length thereof, said soft iron ellipsoidal beads being fixed in said spaced relationship by said resiliency of said flexible tubular member;
said magnetic apparatus being adapted when inserted into the cavity of a body part, to be uniformly and unidirectionally attracted by a magnet external of the body for desired displacement of said body part as aforesaid substantially without the application of torque to said beads.
2. Magnetic apparatus insertable into a body cavity, for displacement of internal body organs as defined in claim 1, wherein said flexible tubular member also includes plastic beads alternating with and spaced from said soft iron beads and similarly fixed in said spaced relationship by said resiliency of said flexible tubular member.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2863458 *||Sep 4, 1957||Dec 9, 1958||Bambara John P||Vein stripper and a method of stripping veins|
|US3043309 *||Sep 29, 1959||Jul 10, 1962||Avco Corp||Method of performing intestinal intubation|
|US3206657 *||Apr 4, 1961||Sep 14, 1965||Moriya Saburo Miyata||Magnet assembly for filtering|
|US3674014 *||Oct 21, 1970||Jul 4, 1972||Astra Meditec Ab||Magnetically guidable catheter-tip and method|
|DE1261276B *||Jul 21, 1965||Feb 15, 1968||Storz Karl||Vorrichtung zur Lenkung eines biegsamen Schaftes, insbesondere eines Endoskopschaftes in Koerperhoehlen|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3941119 *||Jul 19, 1974||Mar 2, 1976||Mario Corrales||Means for introducing and guiding objects into body cavities and blood vessels|
|US3961632 *||Dec 13, 1974||Jun 8, 1976||Moossun Mohamed H||Stomach intubation and catheter placement system|
|US4005699 *||Oct 9, 1974||Feb 1, 1977||Louis Bucalo||Methods and apparatus for use in magnetic treatment of the body|
|US4024855 *||Nov 18, 1975||May 24, 1977||Louis Bucalo||Magnetic filamentary structure and method for using the same|
|US4063561 *||Sep 20, 1976||Dec 20, 1977||The Signal Companies, Inc.||Direction control device for endotracheal tube|
|US4111190 *||Nov 11, 1976||Sep 5, 1978||Jane Plumridge||Medical applicator assembly for chain cystourethrographic procedure|
|US4197840 *||Sep 29, 1976||Apr 15, 1980||Bbc Brown Boveri & Company, Limited||Permanent magnet device for implantation|
|US4197846 *||Jun 25, 1975||Apr 15, 1980||Louis Bucalo||Method for structure for situating in a living body agents for treating the body|
|US4294260 *||Jun 18, 1979||Oct 13, 1981||Olympia Radiological Associates||Cystourethrographic examination chain|
|US4303062 *||Jul 9, 1980||Dec 1, 1981||Intervet, Inc.||Therapeutic magnet|
|US4364377 *||Feb 2, 1981||Dec 21, 1982||Walker Scientific, Inc.||Magnetic field hemostasis|
|US4410320 *||Aug 28, 1981||Oct 18, 1983||Ethox Corp.||Weighted enteric feeding tube|
|US4545081 *||Mar 12, 1984||Oct 8, 1985||Jack Nestor||Semi-rigid penile prosthesis with separable members and posture control|
|US4809713 *||Oct 28, 1987||Mar 7, 1989||Joseph Grayzel||Catheter with magnetic fixation|
|US5042475 *||Mar 8, 1990||Aug 27, 1991||Portex, Inc.||Hinged tracheostomy tube obturator|
|US5125888 *||Jan 10, 1990||Jun 30, 1992||University Of Virginia Alumni Patents Foundation||Magnetic stereotactic system for treatment delivery|
|US5222487 *||Jun 21, 1991||Jun 29, 1993||Smiths Industries Medical Systems, Inc.||Hinged tracheostomy tube obturator|
|US5361754 *||Jan 25, 1993||Nov 8, 1994||Mallinckrodt Medical, Inc.||Apparatus and method for connecting a tracheostomy tube to a neckplate|
|US5415165 *||Aug 16, 1994||May 16, 1995||Mountpelier Investments||Tonometric catheter combination|
|US5429131 *||Feb 25, 1994||Jul 4, 1995||The Regents Of The University Of California||Magnetized electrode tip catheter|
|US5431640 *||Nov 9, 1994||Jul 11, 1995||The Medical Center Of Central Georgia||Method and apparatus for duodenal intubation of a patient|
|US5433216 *||Jun 14, 1993||Jul 18, 1995||Mountpelier Investments, S.A.||Intra-abdominal pressure measurement apparatus and method|
|US5443478 *||Sep 2, 1992||Aug 22, 1995||Board Of Regents, The University Of Texas System||Multi-element intravascular occlusion device|
|US5456251 *||Oct 12, 1994||Oct 10, 1995||Mountpelier Investments, S.A.||Remote sensing tonometric catheter apparatus and method|
|US5526809 *||May 19, 1995||Jun 18, 1996||Mountpelier Investments, S.A.||Hollow viscous and soild organ tonometry|
|US5527338 *||Dec 9, 1993||Jun 18, 1996||Board Of Regents, The University Of Texas System||Intravascular device|
|US5529568 *||Mar 18, 1994||Jun 25, 1996||Surgery Futures Research, Inc.||Magnetic operating table|
|US5546937 *||Dec 13, 1993||Aug 20, 1996||Stuart; J. Michael||Obturator and tracheostomy tube containing the obturator|
|US5593379 *||Jun 5, 1995||Jan 14, 1997||Surgery Futures Research, Inc.||Magnetic operating table|
|US5645065 *||Apr 11, 1995||Jul 8, 1997||Navion Biomedical Corporation||Catheter depth, position and orientation location system|
|US5693067 *||Jun 12, 1996||Dec 2, 1997||Board Of Regents, The University Of Texas System||Intravascular device|
|US5778877 *||Jun 5, 1995||Jul 14, 1998||Mallinckrodt Medical, Inc.||Apparatus and method for connecting a tracheostomy tube to a neckplate|
|US5779694 *||Jul 19, 1993||Jul 14, 1998||The University Of Virginia Alumni Patents Foundation||Magnetic stereotactic system for treatment delivery|
|US5788631 *||Feb 29, 1996||Aug 4, 1998||Instrumentarium Corporation||Hollow viscus and solid organ tonometry|
|US5851218 *||Jan 2, 1997||Dec 22, 1998||Lev; Shlomo||Annular catheter method of assembling and method of using the same|
|US5925062 *||Sep 26, 1997||Jul 20, 1999||Board Of Regents, The University Of Texas System||Intravascular device|
|US5951566 *||Feb 28, 1997||Sep 14, 1999||Lev; Shlomo||Annular catheter|
|US5989225 *||Mar 19, 1997||Nov 23, 1999||Sherwood Services Ag||Gastrointestinal-type tube insertion or removal device|
|US6010453 *||May 12, 1995||Jan 4, 2000||Instrumentarium Corporation||Tonometric catheter combination|
|US6045536 *||Feb 24, 1999||Apr 4, 2000||Sherwood Services, A.G.||Securing device for a low profile gastrostomy tube|
|US6146396 *||Mar 5, 1999||Nov 14, 2000||Board Of Regents, The University Of Texas System||Declotting method and apparatus|
|US6216030||Jul 13, 1998||Apr 10, 2001||The University Of Virginia Alumni Patents Foundation||Magnetic stereotactic system for treatment delivery|
|US6273904||Mar 2, 1999||Aug 14, 2001||Light Sciences Corporation||Polymer battery for internal light device|
|US6334064||May 26, 1995||Dec 25, 2001||Instrumentarium Corp.||Remote sensing tonometric catheter apparatus and method|
|US6368338||Mar 5, 1999||Apr 9, 2002||Board Of Regents, The University Of Texas||Occlusion method and apparatus|
|US6542766 *||Jul 19, 2001||Apr 1, 2003||Andrew F. Hall||Medical devices adapted for magnetic navigation with magnetic fields and gradients|
|US6894456||Dec 5, 2002||May 17, 2005||Quallion Llc||Implantable medical power module|
|US6994717||Apr 9, 2002||Feb 7, 2006||Board Of Regents, The University Of Texas Systems||Occlusion method and apparatus|
|US7003356||Apr 17, 2002||Feb 21, 2006||Quallion Llc||Battery terminal sealing and supporting device and method|
|US7009362||Nov 19, 2003||Mar 7, 2006||Quallion Llc||Standalone implantable medical power module|
|US7010338||Jan 6, 2003||Mar 7, 2006||Stereotaxis, Inc.||Device for locating magnetic implant by source field|
|US7166127||Sep 24, 2004||Jan 23, 2007||Mitralign, Inc.||Tissue fastening systems and methods utilizing magnetic guidance|
|US7431726||Sep 24, 2004||Oct 7, 2008||Mitralign, Inc.||Tissue fastening systems and methods utilizing magnetic guidance|
|US7486048||Jul 29, 2004||Feb 3, 2009||Quallion Llc||Implantable power module for powering a medical device|
|US7744596 *||Oct 13, 2005||Jun 29, 2010||Boston Scientific Scimed, Inc.||Magnetically augmented radio frequency ablation|
|US7976518||Jan 13, 2005||Jul 12, 2011||Corpak Medsystems, Inc.||Tubing assembly and signal generator placement control device and method for use with catheter guidance systems|
|US7993285 *||Nov 5, 2002||Aug 9, 2011||Boston Scientific Scimed, Inc.||Medical device having flexible distal tip|
|US8142493||Jul 22, 2008||Mar 27, 2012||Mitralign, Inc.||Method of heart valve repair|
|US8197494||Sep 8, 2006||Jun 12, 2012||Corpak Medsystems, Inc.||Medical device position guidance system with wireless connectivity between a noninvasive device and an invasive device|
|US8460371||Oct 21, 2003||Jun 11, 2013||Mitralign, Inc.||Method and apparatus for performing catheter-based annuloplasty using local plications|
|US8845723||Mar 13, 2007||Sep 30, 2014||Mitralign, Inc.||Systems and methods for introducing elements into tissue|
|US8864822||Mar 13, 2007||Oct 21, 2014||Mitralign, Inc.||Devices and methods for introducing elements into tissue|
|US8911461||Nov 5, 2007||Dec 16, 2014||Mitralign, Inc.||Suture cutter and method of cutting suture|
|US8951285||Jul 5, 2005||Feb 10, 2015||Mitralign, Inc.||Tissue anchor, anchoring system and methods of using the same|
|US8951286||Nov 19, 2008||Feb 10, 2015||Mitralign, Inc.||Tissue anchor and anchoring system|
|US8979923||Sep 24, 2004||Mar 17, 2015||Mitralign, Inc.||Tissue fastening systems and methods utilizing magnetic guidance|
|US9028441||Sep 7, 2012||May 12, 2015||Corpak Medsystems, Inc.||Apparatus and method used with guidance system for feeding and suctioning|
|US9131956||Jun 2, 2011||Sep 15, 2015||Corpak Medsystems, Inc.||Tubing assembly and signal generator placement control device and method for use with catheter guidance systems|
|US9149740||Dec 1, 2011||Oct 6, 2015||Adey Holdings (2008) Limited||Water and dirt separator|
|US9259218||Feb 26, 2013||Feb 16, 2016||Mitralign, Inc.||Tissue anchor and anchoring system|
|US9358111||Aug 27, 2013||Jun 7, 2016||Mitralign, Inc.||Tissue anchors, systems and methods, and devices|
|US9358112||Dec 19, 2013||Jun 7, 2016||Mitralign, Inc.||Method and apparatus for catheter-based annuloplasty using local plications|
|US9463471||Dec 1, 2011||Oct 11, 2016||Adey Holdings (2008) Limited||Water and dirt separator|
|US9579488||Sep 14, 2015||Feb 28, 2017||Corpak Medsystems, Inc.||Tubing assembly and signal generator placement control device and method for use with catheter guidance systems|
|US20020156499 *||Apr 9, 2002||Oct 24, 2002||Andras Konya||Occlusion method and apparatus|
|US20030153827 *||Jan 6, 2003||Aug 14, 2003||Ritter Rogers C.||Method and device for locating magnetic implant by source field|
|US20030171783 *||Apr 17, 2002||Sep 11, 2003||Quallion Llc||Battery terminal sealing and supporting device and method|
|US20040019378 *||Jul 18, 2003||Jan 29, 2004||Hlavka Edwin J.||Method and apparatus for performing catheter-based annuloplasty|
|US20040087876 *||Nov 5, 2002||May 6, 2004||Scimed Life Systems, Inc.||Medical device having flexible distal tip|
|US20040172046 *||Oct 21, 2003||Sep 2, 2004||Hlavka Edwin J.||Method and apparatus for performing catheter-based annuloplasty using local plications|
|US20050021100 *||Jul 29, 2004||Jan 27, 2005||Quallion Llc||Implantable medical power module|
|US20050119734 *||Sep 24, 2004||Jun 2, 2005||Spence Paul A.||Tissue fastening systems and methods utilizing magnetic guidance|
|US20050119735 *||Sep 24, 2004||Jun 2, 2005||Spence Paul A.||Tissue fastening systems and methods utilizing magnetic guidance|
|US20050125011 *||Jan 31, 2005||Jun 9, 2005||Spence Paul A.||Tissue fastening systems and methods utilizing magnetic guidance|
|US20050137700 *||Sep 24, 2004||Jun 23, 2005||Spence Paul A.||Tissue fastening systems and methods utilizing magnetic guidance|
|US20050184122 *||Apr 21, 2005||Aug 25, 2005||Mitralign, Inc.||Method and apparatus for performing catheter-based annuloplasty using local plications|
|US20050267571 *||Sep 24, 2004||Dec 1, 2005||Spence Paul A||Tissue fastening systems and methods utilizing magnetic guidance|
|US20060069429 *||Sep 24, 2004||Mar 30, 2006||Spence Paul A||Tissue fastening systems and methods utilizing magnetic guidance|
|US20060155303 *||Feb 6, 2006||Jul 13, 2006||Andras Konya||Occlusion method and apparatus|
|US20060173407 *||Jan 13, 2005||Aug 3, 2006||Shaughnessy Michael C|
|US20070010857 *||Jul 5, 2005||Jan 11, 2007||Mitralign, Inc.||Tissue anchor, anchoring system and methods of using the same|
|US20070021645 *||Jul 13, 2004||Jan 25, 2007||Joachim Zimmerman||Medical device|
|US20070038074 *||Mar 7, 2006||Feb 15, 2007||Ritter Rogers C||Method and device for locating magnetic implant source field|
|US20070080188 *||Jun 22, 2006||Apr 12, 2007||Mitralign, Inc.||Tissue fastening systems and methods|
|US20070112424 *||Jan 11, 2007||May 17, 2007||Mitralign, Inc.||Catheter based tissue fastening systems and methods|
|US20070135802 *||Dec 14, 2005||Jun 14, 2007||Olympus Medical Systems Corp.||Method of lifting diseased part, tissue lifting system, and indwelling tool|
|US20070197906 *||Jan 16, 2007||Aug 23, 2007||Ritter Rogers C||Magnetic field shape-adjustable medical device and method of using the same|
|US20080097475 *||Sep 8, 2006||Apr 24, 2008||Viasys Holdings, Inc.||Medical device position guidance system with wireless connectivity between a noninvasive device and an invasive device|
|US20080171907 *||Jan 12, 2007||Jul 17, 2008||Ethicon Endo-Surgery, Inc.||Magnetic Tissue Grasping|
|US20080228165 *||Mar 13, 2007||Sep 18, 2008||Mitralign, Inc.||Systems and methods for introducing elements into tissue|
|US20080228198 *||Nov 5, 2007||Sep 18, 2008||Mitralign, Inc.||Suture cutter and method of cutting suture|
|US20080228265 *||Mar 13, 2007||Sep 18, 2008||Mitralign, Inc.||Tissue anchors, systems and methods, and devices|
|US20080228267 *||Mar 13, 2007||Sep 18, 2008||Mitralign, Inc.||Devices and methods for introducing elements into tissue|
|US20090062772 *||Aug 29, 2008||Mar 5, 2009||Syncro Medical Innovations, Inc.||Guided catheter with removable magnetic guide|
|US20090076547 *||Nov 19, 2008||Mar 19, 2009||Mitralign, Inc.||Tissue anchor and anchoring system|
|US20100145147 *||Sep 2, 2009||Jun 10, 2010||Syncro Medical Innovations, Inc.||Magnetic device for guiding catheter and method of use therefor|
|USRE38972 *||Jul 19, 2001||Feb 7, 2006||Board Of Regents, The University Of Texas System||Intravascular device|
|USRE43030||Apr 27, 2005||Dec 13, 2011||Board Of Regents, The University Of Texas System||Intravascular device|
|DE4014947A1 *||May 10, 1990||Nov 14, 1991||Wolfgang Dr Med Ram||Flexible catheter for diagnostic or therapeutic purposes - has very small guiding magnet of high remanence at distal end and extra corporal control magnets|
|DE19733889A1 *||Aug 5, 1997||Feb 11, 1999||Kadalie Clemens Themba||Representation of organ systems during control and guidance of e.g. guide wires, probes, catheters and endoscopes|
|DE102010036806A1 *||Aug 2, 2010||Feb 2, 2012||Sun Lung Gear Works Co., Ltd.||Apparatus for magnetic cleaning of contaminated oil in e.g. gearbox, has handle comprising end connected with flexible disk-shaped or rod-shaped magnetic unit, where supporting element is provided at outer side of magnetic unit|
|EP0232968A2 *||Jan 9, 1987||Aug 19, 1987||Mountpelier Investments, S.A.||Apparatus for placement of and in combination with a pliable catheter|
|EP0232968A3 *||Jan 9, 1987||Jun 15, 1988||Richard G. Fiddian-Green||Apparatus and method for sustaining vitality of organs of the gastrointestinal tract|
|EP0773005A1||Nov 13, 1995||May 14, 1997||Surgery Futures Research Inc.||Magnetic operation table|
|WO1993000124A1 *||Jun 19, 1992||Jan 7, 1993||Smiths Industries Medical Systems, Inc.||A hinged tracheostomy tube obturator|
|WO1996032075A1 *||Apr 4, 1996||Oct 17, 1996||Iradj Hessabi||Device for aiding oral administration, especially to animals|
|WO1997034552A1 *||Mar 19, 1997||Sep 25, 1997||Sherwood Medical Company||Gastrointestinal-type tube insertion or removal device|
|WO1999056813A1||May 5, 1998||Nov 11, 1999||Sabry Gabriel||Method and apparatus for intubation of a patient|
|U.S. Classification||606/108, 600/12|
|International Classification||A61M25/092, A61M25/01|