|Publication number||US3757768 A|
|Publication date||Sep 11, 1973|
|Filing date||Apr 7, 1972|
|Priority date||Apr 7, 1972|
|Also published as||CA984253A, CA984253A1, DE2317479A1, DE2317479B2|
|Publication number||US 3757768 A, US 3757768A, US-A-3757768, US3757768 A, US3757768A|
|Original Assignee||Medical Evaluation Devices And|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (6), Non-Patent Citations (1), Referenced by (136), Classifications (11), Legal Events (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Kline 1 Sept. 11, 1973 AND TUBE FOR INTRAVENOUS FEEDING Related US. Application Data MANIPULABLE SPRING GUIDE-CATHETER OTHER PUBLICATIONS U.S.C.l. Catalogue, 1967, pg. 41
Primary Examiner-Dalton L. Truluck Att0rneyThomas E. Tate  ABSTRACT This invention is directed to a man ipulable, flexible, unitary, combined spring guide-catheter that includes an inner wallportion formed as a continuous helical spring with the helices in contact with each other and  Continuatiomimpan of 213,224, Jan. 17 Y an outer wall portion formed from an inert plastic ma- |972 abandone terial enclosing the spring in such a manner as to become firmly bonded to the spring while having its outer 52 S L n 123/2 M 123 343 123 9 surface smooth. The distal end of the outer wall ex- 51 Int. Cl A61m 25/00 tends beyond that of the inner to define a hollow  Field of Search ..12s/34s-351, 343, 356, p that is provided with axial attd/or radial p 03 R, 2 M, 20 R, tions. A wire stylette is freely carried within the lumen 1 9 2144 of the inner wall; and the stylette and the spring guidecatheter are separately manipulable by suitable handles 5 References an attached to the respective proximal ends thereof. A UNITED STATES PATENTS shorter length guide-catheter of this same construction, but without the wire stylette, may be used to replace 3 the rigid tubes heretofore used for intra-venous feed- 3,598,126 8/1971 Hoeltzenbeinm. 128/348 3,6I8,6l3 11/1971 Schulte 128/348 3,055,361 9/1962 Ballard l28/2l4.4 7 Claims, 8 Drawing Figures 3,687,142 8/1972 Leibinzohn 128/348 MANIPULABLE SPRING GUIDE-CATHETER AND TUBE FOR INTRAVENOUS FEEDING RELATED APPLICATION This application is a continuation-in-part of my copending application Ser. No. 218,224, filed Jan. 17, 1972 (now abandoned), under the title Manipulable Combined Spring Guide and Catheter.
THE INVENTION This invention is generally directed to new and useful improvements in those types of spring guides and catheters that are used for the catheterization of the heart and/or internal vessels of the body during certain diagnostic testing and treating procedures and particularly seeks to provide a novel, unitary, manipulable, combined spring guide and catheter for such purposes.
Although catheters of various constructions and materials have long been known, it has been only relatively recently that catheters and devices for controlling them have been developed to permit their generally successful use in techniques such as those required for coronary arteriography or aortography by percutaneous catheterization.
Currently, such techniques generally require the percutaneous insertion of a sharpened cannula into the lumen of a vein or other vessel, after which a wire guide is inserted through the cannula and advanced through the curvatures of the vessel(s), under fluoroscopic observation, until the distal tip of the guide has reached the position at which the injection of a liquid contrast material, or pressure or other readings taken, in order to commence the diagnostic test or chemo-therapy treatment. After the wire guide has been thus advanced to its then ultimate position, a catheter is inserted thereover and advanced to the point at which its distal end coincides with or extends beyond the distal end of the wire guide. At this stage, the wire guide must be withdrawn in order to allow sufficient volume within the lumen of the catheter to permit the required rate of flow of the injected contrast medium to take place or to permit the taking of pressure or other measurements without the throttling or other effects that may be caused by the presence of the wire guide.
Obviously, such catheterizations are very delicate in nature, requiring manipulative techniques that avoid such problems as the inadvertant perforation of the wall of a vessel, breaking or kinking of the guide due to its mishandling during advance through the curvatures or convolutions of the vessels lumen, or comparable problems in advancing the catheter over the wire guide. Still further complications can arise during or as a consequence of withdrawing the wire guide in the event that its withdrawal or retraction is improperly effected.
More recently, such problems have been somewhat reduced through the use of guides formed as closely wound helical springs that are more capable of following the various curvilinear paths of the vessels lumen; and still more recently, these latter types of wire guides have been constructed to permit the manipulation of their distal ends by devices located at their proximal ends.
Even so, it is still necessary to withdraw the wire guide after the catheter has been advanced into place thereover.
However, a combined spring guide and catheter constructed in accordance with this invention overcomes the problems heretofore present in such catheterization procedures'and does not require the separate and successive use of a wireguide followed by a catheter, and in a shorter length can be used as a tube for intravenous feeding.
Therefore, an object of this invention is to provide a novel manipulable unitary spring guide and catheter that can be ued in place of the heretofore used separate spring guides and used Another object of this invention :is to provide a spring guide-catheter of the character stated that is of tubular construction and includes an inner wall portion formed from a continuous helically wound metal spring with the helices thereof in contact with each other and an outer wall portion or sheath formed from an inert plastic material that is shrunk fit over the coils of said inner wall portion.
Another object of this invention is to provide a spring guide-catheter of the character stated in which the distal end of said outer wall portion extends distally beyond the distal end of said spring-defined inner wall portion and is provided with at least one perforation whereby to define a distal tip for open communication with the adjacent portion of the vessel into which said spring guide-catheter has been inserted.
Another object of this invention is to provide a spring guide-catheter of the character stated into which a preconfigured wire stylette may be freely inserted and withdrawn before, during or after insertion of the spring guide-catheter into a body vessel, whereby to assist the guidance or positioning of at least the distal end of the spring guide-catheter.
Another object of this invention is to provide a spring guide-catheter of the character stated in which detachable means are provided for torsionally rotating or oscillating the spring guide-catheter and for advancing, retracting or rotating or oscillating; the freely movable wire stylette.
A further object of this invention is to provide a spring guide-catheter of the character stated which is so constructed that its lumen capacity for any given outside diameter is greater than that heretofore available in prior known catheters of corresponding external diameters.
A further object of this invention is to provide a spring guide-catheter of the character stated in which the distal end of the outer wall portion or sheath may be preformed into any desired curvilinear shape.
A further object of this invention is to provide a spring guide-catheter of the character stated in which the material of the spring inner wall is sufficiently radiopaque as to eliminate the need for any additional radi opaque material in order to permit fluoroscopic observation of the guide-catheter as it is advanced, manipulated or retracted.
A further object of this invention is to provide a spring guide-catheter of the character stated in which the outer wall portion is sufficiently strong and well bonded to the spring inner wall portion as to safely contain the spring in the event that it should become broken due to any overviolent mishandling by an operator or to fatigue that may occur through overuse.
A further object of this invention is to provide a guide-catheter of the character stated that, if produced in short lengths and without the wire stylette, can be used as an insertable tube for intra-venous feeding purposes.
A further object of this invention is to provide a spring guide-catheter of the character stated that is simple in design, rugged in construction and economical to manufacture.
With these and other objects, the nature of which will be apparent, the invention will be more fully understood by reference to the drawings, the accompanying detailed description and the appended claims.
In the drawings:
FIG. 1 is an enlarged longitudinal section of a spring guide-catheter constructed in accordance with this invention and shows a straight tip having a single axial perforation at its distal end;
FIG. 2 is an enlarged longitudinal section of the distal end of the spring guide-catheter in which the tip is preformed into a curvilinear shape and is provided with a plurality of lateral perforations;
FIG. 3 is an enlarged detail elevation of the distal end of a control wire stylette that has been preformed into a J-configuration;
FIG. 4 is a view similar to FIG. 3 but showing the wire stylette preformed as a long pitch spiral;
FIG. 5 is an enlarged fragmentary longitudinal section of the proximal end of the spring guide-catheter when attached to typical manipulating handles or devices;
FIG. 6 is a view similar to FIG. 1, but showing a modification of the spring guide-catheter, without the wire stylette, for use as an intra-venous feeding tube;
FIG. 7 is a fragmentary longitudinal section of the distal end of the tube of F IG. 6, but showing its tip biased or cut at an angle; and
FIG. 8 is a fragmentary longitudinal section of or modification of the distal end of the tube of FIG. 6 in which the distally extending hollow tip has been eliminated.
Referring to the drawings in detail the invention, as illustrated, is embodied in a spring guide-catheter generally indicated 5 that may be made in any required length, for example, from 20 cm. to 150 cm. or more, and ofa size ranging from a No. 2 to a No. 10 French.
The spring guide-catheter 5 includes an inner wall portion 6 defined by a continuous helical spring wound with the helices thereof in contact with each other and formed from stainless steel spring wire, and an outer portion 7 formed from a tube of smooth, inert, flexible plastic material, such as a halogenated hydrocarbon, that is shrunk-fit, as by heat, over the inner wall portion 6 in such a manner that the outer surface of the plastic tube remains smooth and its inner surface is forced into the spiral grooves on the outer surface of the inner wall portion 6, thus effecting a firm bond between the outer tube and the inner spring.
The tubular outer wall portion 7 extends beyond the distal end of the inner wall portion 6 to define a distally extending straight tip 8 (see FIG. 1) provided at its distal end with an axial perforation 9 to permit open communication between the lumen of the spring guidecatheter 5 and the lumen of the vessel into which the spring guide-catheter is inserted.
Shrinkage of the plastic tube from which the outer wall portion 7 is formed causes a natural slight necking down of the tip 8, as at 10, which locks the distal end of the inner wall spring against axial elongation and also provides a smaller outside diameter for the tip which enhances its advance through a vessel or into a branch thereof.
FIG. 2 of the drawings shows a modification of the distal end of the spring guide-catheter in which the tip 8 thereof is preformed, as by heat-setting, into a curved shape and the axial perforation 9 is replaced by a plurality of lateral or radial perforations 11.
A stylette wire 12, for assisting in the manipulation and control of the spring guide-catheter as it is being advanced into or withdrawn from a vessel, fits freely within the lumen 13 of the spring guide-catheter and is freely movable axially with respect thereto. The stylette wire 12 may be straight as shown in FIG. 1; may have a preformed J-shape 14 at its distal end as shown in FIG. 3; or may have all or a portion of its length formed as a long-pitch spiral 15 as shown in FIG. 4. In any event, the specific configuration or curvature of the wire stylette will be that which has been determined, from manipulative experience, to be the most desirable to enable the spring guide-catheter to be most easily used for the type of catheterization involved.
In use, and common to prior techniques, a sharpened hollow needle or cannulus is first used to gain percutaneous entry to the lumen of a vessel to be catheterized, after which the spring guide-catheter of this invention is employed for the actual catheterization.
At this stage, due to the unitary construction and proportions of this spring guide-catheter, only the single passage of a single device along the lumen of the vessel to be catheterized is required.
By contrast, all prior known techniques have at least required; firstly, the introduction and advance of an independent spring guide to its ultimate position within the lumen of a vessel; secondly, the insertion of a catheter over the previously inserted spring guide with the consequent further abrasion or frictional contact with the walls of the vessels lumen and a further dilation thereof due to the added thickness of the catheter; and thirdly a complete retraction or withdrawal of the initially implanted spring guide in order to provide sufficient volumetric capacity within the lumen of the implanted catheter to permit the proper infusion of a contrast medium through the catheter or to permit the unobstructed or unthrottled taking of pressure or other measurements therethrough.
Here, even if the stylette wire 12 should be retained within the lumen of the spring guide-catheter 5, there is still sufficient capacity within the lumen to permit proper infusion of a contrast medium under the required pressure or to permit the taking of pressure or other measurements, although such functions would be enhanced if the wire stylette were completely retracted or withdrawn before any such functions are commenced.
It should be pointed out that the fully bonded innerto-outer wall construction of the spring guide-catheter of this invention enables it to withstand any normally used pressures for the introduction and dispersion of a contrast medium through the distal tip and that the tip itself has a wall strength to withstand such pressures, even though there is a pressure drop in the tip due to the release or discharge of the contrast medium through the perforations thereof.
Manipulation of the spring guide-catheter 5 by torsion in either direction and its advance or retraction within the lumen of a vessel is effected by a handle generally indicated 16 which is removably attached to the proximal end of the spring guide-catheter and provided with an axial bore 17 which initially permits passage of the wire stylette 12 therethrough and subsequently serves as a duct for transmission of the contrast medium or the taking of pressure measurements after the stylette has been fully withdrawn therefrom.
The stylette 12 is manipulated axially and torsionally relative to the spring guide-catheter as the spring guidecatheter is being advanced to assist in the proper directioning thereof during advance. For this purpose, a handle or knob generally indicated 18 is removably attached to the proximal end of the stylette.
It will have become evident from the description thus far, that since only a single device, namely the combined spring guide-catheter of this invention, is required for catheterization in a single pass into a vessel, the time required to effect the fully-controlled catheterization is greatly reduced in comparison with that required by prior known techniques using separate and sequentially inserted spring guides and catheters.
Furthermore, the spring guide-catheter of this invention is so proportioned and constructed that it can be used for the controlled catheterization of smaller diameter vessels than heretofore possible while retaining an adequate capacity for the transmission of a contrast medium therethrough at any desired flow rate and pressure normally used.
For example, it is believed that no prior known sequentially used spring guides and catheters could effectively catheterize vessels having lumens smaller than about 0.72 inch I.D. (inside diameter), since a French No. 5 catheter, having an OD. (outside diameter) of about 0.65 inch is the smallest that could be used for such a vessel while providing sufficient volume capacity within the catheter lumen to properly transmit a contrast medium under the flow rates and pressures required.
In contrast, a spring guide-catheter constructed in accordance with this invention can be fabricated down to a No.2 or No.3 French size (O.D. 0.035 0.045 inch) and still have adequate lumen capacity for the transmission of a contrast medium, under the desired flow rates and pressures, without danger of blow out through the walls or of whiplash of the distal end due to reaction from the release or emission of the contrast medium through the perforation(s) of the tip thereof.
As a corrolary, itshould also be noted that, on a sizefor-size basis, the spring guide-catheter of this invention has a delivery capacity of from about 1.5 to about 1.75 times greater than that of prior catheters per se usable for the same purposes.
Where the tip 8 is provided with the single distal axial perforation 9, as shown in FIG. 1, it has been observed that the discharge of a contrast medium therethrough takes place in a whirling manner about the axis of delivery, thus assuring complete and immediate contact of the contrast medium with all of the adjacent wall portions of the vessels lumen.
If the length of the tip 8 should extend sufficiently beyond the distal end of the radiopaque spring inner wall 6 that additional radiopaqueness of the tip is required, such can be accomplished by treating all or part of the tip with a supplemental radiopaque material that either is incorporated therein or is separately applied and firmly bonded thereto.
As previously indicated in the objects of this invention and as illustrated inFlGS. 6-8 of the drawings, this spring guide-catheter may be readily modified by reducing its length to from about 25-100 cm. and by eliminating the wire stylette 12 in order to adapt it for use as a flexible intra-venous feeding tube to replace the heretofore used normally rigid I.V. tubes or hollow needles.
It is believed that, originally, such I.V. tubes were made of a frangible material such as glass, with consequent risks of injury to the patient due to breaking of the tube during or after insertion thereof into a vein or to movements of the patient that would cause discomfort, breaking of the tube or even perforation of the vein wall; or, more recently, were made of a vinyl or other relatively rigid plastic material that eliminated only the breakage problem while introducing the new problem of flow stoppage or reduction due to wall collapse or kinking resulting from a patients movements.
Such problems, too, are solved through the use of guide-catheter tubes constructed in accordance with this invention since these tubes (1) are not frangible; (2) are strong enough to withstand substantial flexing without being subject to wall collapse or kinking; and (3) are sufficiently flexible as to minimize patient discomfort during movements while at the same time adapting to such patient movements without danger of causing perforation of the vein walls.
For this purpose (see FIG. 6) the guide-catheter 5 still comprises the spring inner wall portion 6, the plastic outer wall portion 7 and the distal tip 8 extending from the necked-down portion 10. However, the distal end of the tip 8 is shorter than that shown in FIG. 1 and is open as at 19 to permit a free flow of the I.V. liquid therethrough; and the handle 16 (shown in FIG. 5) at the proximal end of the guide-catheter 5 is replaced by a female Luer or other suitable fitting 20 for connection with the discharge from the I.V. supply.
Naturally, the lumen capacity of this modification of the guide-catheter will be such as to permit the required flow rate of the I.V. fluid while its outside diameter is small enough to permit its ready insertion into the patients vein.
Although it is believed desirable in this modification to retain the shortened distal tip 8, since its somewhat smaller diameter enhances the ease of insertion of the I.V. tube into a vein, some technicians may feel that it produces an unnecessary constriction at the distal end. In such cases the tip 8 may be eliminated by terminating the outer wall portion 7 at the distal end of the inner wall portion 6 (see FIG. 8), where its natural tendency to neck-down will simply form a smooth bead 21 at the distal end which still will restrain the inner wall portion 6 against axial elongation.
The distal end of the tip 8 may also be biased or cut off at an angle as shown at 22 in FIG. 7 of the drawings.
For either catheterization of I.V. feeding purposes, percutaneous access to the vein or vessel involved may be gained through the use of a sharpened split cannula or needle through which the guide-catheter or I.V. tube is inserted and which is removed from the patient immediately thereafter.
Whenever the guide-catheter or I.V. tube must remain in place for a substantial length of time, its proximal end may be removably fastened to the patients skin by adhesive tape, but more preferably through the use of a two part multiple hook fabric fastener, such as that currently available under the trademark Velcro", in which one part is carried by the proximal end of the tube or guide-catheter and the other part is carried by the exposed surface of a strap or adhesive strip removably fastened to the patient.
It should be further mentioned that, due to the relative low cost of fabrication, the spring guide-catheter of this invention normally will be disposed or discarded after a single use, even though its materials and construction are such that it is capable of being used a plurality of times before being discarded, assuming that it would be properly autoclaved for cleanliness and sterility between uses.
It is of course to be understood that variations in arrangements and proportions of parts may be made within the scope of the appended claims.
1. A flexible spring guide-catheter including an inner wall portion having proximal and distal ends and formed from stainless steel wire as a continuously wound lumen-defining helical spring with the helices thereof in contact with each other, and an uninter rupted externally smooth outer wall portion having proximal and distal ends and formed from an inert halogenated hydrocarbon so applied around said helical spring that its inner surface is firmly bonded thereto and its outer surface remains smooth, the distal end of said outer wall portion extending beyond the distal end of said inner wall portion and shaped to define a hollow tip, said hollow tip being provided with at least one perforation to effect open communication between the exterior and interior thereof, the proximal end of said hollow tip being closely engaged around the distal end of said inner wall portion whereby to prevent the said distal end of said inner wall portion from becoming axially elongated (the proximal portion of exterior and interior thereof).
2. The spring guide-catheter of claim 1 in which said hollow tip is preformed into a curvilinear shape.
3. The spring guide-catheter of claim 1 additionally including a wire stylette freely movable into and out of the lumen of said inner wall portion, and having a length such that when fully inserted into said spring guide-catheter the proximal end of said wire stylette extends proximally beyond the proximal end of said spring guide-catheter a distance sufficient to permit its manipulation from such proximal location, at least the distal end portion of said wire stylette being preformed into a curvilinear shape;
4. The spring guide-catheter of claim 1 additionally including; a wire stylette freely movable within the lumen of said inner wall portion and having a length such that when fully inserted into said spring guidecatheter the proximal end of said wire stylette extends proximally beyond the proximal end of said spring guide-catheter a distance sufficient to permit its manipulation from such proximal location; a first manipula tive handle provided with an axial bore to permit free passage of said wire stylette therethrough and removably attached to the proximal end of said spring guidecatheter; and a separate manipulative handle removably attached to the proximal end of said wire stylette proximally of said first manipulative handle.
5. The construction of claim 1 having a length of from about 2.5 to about 10.0 cm. whereby to be capable without physical change for use as a tube for intravenous feeding purposes, and additionally including a fitting rigidly affixed to the proximal end thereof for operative connection to a liquid supply source.
6. The spring guide-catheter of claim 5 wherein said outer wall portion terminates at the distal end of said inner wall portion.
7. The intra-venous feeding tube of claim 5 wherein the distal end of said outer wall portion is cut off at an angle distally of said inner wall portion.
UNITED STATES PATENT oTFIcE I CERTIFICATE OF CORRECTION Patent No. 757 768 Dated September 11 1973 William M. Kline Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column 7, lines 34 and 35, cancel "(the proximal portion of exterior and interior thereof)".
Signed and sealed this 26th day of March 1974.
1 (SEAL) Attest:
EDWARD M.FLETCHER,JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents FORM 904050 (0439) uscoMM-oc wave-Pun X 9 [1.5. GDVERNMENI PRlNTNG OFFICE I 9i 0-3l-J3k
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US243396 *||Mar 25, 1881||Jun 28, 1881||Edwaed peaeee|
|US3055361 *||Apr 22, 1960||Sep 25, 1962||Deseret Pharmaceutical Company||Intravenous catheters|
|US3467101 *||Sep 30, 1965||Sep 16, 1969||Edwards Lab Inc||Balloon catheter|
|US3598126 *||Jul 25, 1968||Aug 10, 1971||Baxter Laboratories Inc||Vascular canula for medical applications|
|US3618613 *||May 19, 1969||Nov 9, 1971||Heyer Schulte Corp||Antithrombotic intravascular catheter reinforced with nonkinking means|
|US3687142 *||Oct 6, 1970||Aug 29, 1972||Leibinzohn Saul||Catheter|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3841308 *||Oct 15, 1973||Oct 15, 1974||Medical Evaluation Devices & I||Distally valved catheter device|
|US3996939 *||Jul 22, 1975||Dec 14, 1976||National Catheter Corporation||Intubation stylets|
|US4044765 *||Dec 17, 1975||Aug 30, 1977||Medical Evaluation Devices And Instruments Corporation||Flexible tube for intra-venous feeding|
|US4052989 *||Oct 30, 1975||Oct 11, 1977||Medical Evaluation Devices And Instruments Corporation||Needle catheter|
|US4068660 *||Jul 12, 1976||Jan 17, 1978||Deseret Pharmaceutical Co., Inc.||Catheter placement assembly improvement|
|US4257429 *||Feb 7, 1979||Mar 24, 1981||Medtronic, Inc.||Stylet retainer and extension|
|US4368730 *||Feb 12, 1981||Jan 18, 1983||Nigel Sharrock||Intravenous catheter|
|US4444188 *||Jul 22, 1981||Apr 24, 1984||Seymour Bazell||Balloon catheter|
|US4464171 *||Mar 29, 1982||Aug 7, 1984||Garwin Mark J||Intravascular insertion apparatus and method|
|US4509945 *||Dec 17, 1982||Apr 9, 1985||Sterimed Gesellschaft Fur Medizinischen Bedarf Mbh||Catheter for catheterizing central veins|
|US4548206 *||Jul 21, 1983||Oct 22, 1985||Cook, Incorporated||Catheter wire guide with movable mandril|
|US4636200 *||Sep 17, 1985||Jan 13, 1987||Chesebrough-Pond's Inc.||Intubating device|
|US4643194 *||Jan 15, 1982||Feb 17, 1987||Thomas J. Fogarty||Flexible calibrator|
|US4713049 *||Aug 5, 1986||Dec 15, 1987||Medical Engineering Corporation||Ureteral stent kit|
|US4787399 *||Jul 1, 1987||Nov 29, 1988||Sarcem S.A.||Remote controlled catheter guide|
|US4787884 *||Sep 1, 1987||Nov 29, 1988||Medical Engineering Corporation||Ureteral stent guidewire system|
|US4800890 *||Dec 26, 1985||Jan 31, 1989||Cramer Bernhard M||Steerable guide wire for catheters|
|US4808164 *||Aug 24, 1987||Feb 28, 1989||Progressive Angioplasty Systems, Inc.||Catheter for balloon angioplasty|
|US4834709 *||Jan 19, 1988||May 30, 1989||Sherwood Medical Company||Preformable catheter|
|US4921482 *||Jan 9, 1989||May 1, 1990||Hammerslag Julius G||Steerable angioplasty device|
|US4927413 *||Aug 24, 1988||May 22, 1990||Progressive Angioplasty Systems, Inc.||Catheter for balloon angioplasty|
|US4932419 *||Mar 21, 1988||Jun 12, 1990||Boston Scientific Corporation||Multi-filar, cross-wound coil for medical devices|
|US4934380 *||Nov 23, 1988||Jun 19, 1990||Boston Scientific Corporation||Medical guidewire|
|US4998916 *||Jan 4, 1990||Mar 12, 1991||Hammerslag Julius G||Steerable medical device|
|US5037391 *||Aug 1, 1990||Aug 6, 1991||Pilot Cardiovascular Systems, Inc.||Steerable angioplasty device|
|US5047018 *||Aug 14, 1989||Sep 10, 1991||Minnesota Mining And Manufacturing Company||Catheter and stylet assembly having dual position stylet|
|US5065769 *||Jan 18, 1991||Nov 19, 1991||Boston Scientific Corporation||Small diameter guidewires of multi-filar, cross-wound coils|
|US5107852 *||Apr 2, 1990||Apr 28, 1992||W. L. Gore & Associates, Inc.||Catheter guidewire device having a covering of fluoropolymer tape|
|US5108368 *||Sep 17, 1990||Apr 28, 1992||Pilot Cardiovascular System, Inc.||Steerable medical device|
|US5111829 *||Jan 18, 1991||May 12, 1992||Boston Scientific Corporation||Steerable highly elongated guidewire|
|US5116309 *||May 20, 1991||May 26, 1992||Coll Milton E||Ureteral stent-catheter system having varying diameter stent|
|US5163912 *||Jul 11, 1991||Nov 17, 1992||Minnesota Mining And Manufacturing Company||Catheter and stylet assembly having dual position stylet|
|US5190546 *||Apr 9, 1991||Mar 2, 1993||Raychem Corporation||Medical devices incorporating SIM alloy elements|
|US5203772 *||Apr 8, 1992||Apr 20, 1993||Pilot Cardiovascular Systems, Inc.||Steerable medical device|
|US5205822 *||Jun 10, 1991||Apr 27, 1993||Cordis Corporation||Replaceable dilatation catheter|
|US5209734 *||Mar 21, 1989||May 11, 1993||Brigham And Women's Hospital, Inc.||Continuous spinal anesthesia administering apparatus|
|US5211636 *||Oct 31, 1990||May 18, 1993||Lake Region Manufacturing Co., Inc.||Steerable infusion guide wire|
|US5217465 *||Feb 28, 1992||Jun 8, 1993||Alcon Surgical, Inc.||Flexible and steerable aspiration tip for microsurgery|
|US5221253 *||May 20, 1992||Jun 22, 1993||Coll Milton E||Urological stent-catheter system having varing diameter stent|
|US5232445 *||Oct 9, 1991||Aug 3, 1993||Tassilo Bonzel||Dilatation catheter|
|US5238004 *||Sep 30, 1992||Aug 24, 1993||Boston Scientific Corporation||High elongation linear elastic guidewire|
|US5290232 *||Feb 17, 1993||Mar 1, 1994||Cordis Corporation||Replaceable dilatation catheter|
|US5292305 *||Sep 1, 1992||Mar 8, 1994||Cordis Corporation||Double-lumen angioscopy catheter|
|US5308324 *||Mar 17, 1993||May 3, 1994||Pilot Cardiovascular Systems, Inc.||Steerable medical device|
|US5312356 *||May 22, 1990||May 17, 1994||Target Therapeutics||Catheter with low-friction distal segment|
|US5346467 *||Jun 11, 1993||Sep 13, 1994||Coll Milton E||Coll-karafin ureteral stent-catheter having varying diameter stent|
|US5354263 *||Jun 21, 1993||Oct 11, 1994||Coll Milton E||Ureteral stent-catheter having varying diameter stent|
|US5360406 *||Jul 7, 1993||Nov 1, 1994||Minnesota Mining And Manufacturing Company||Stylet for retrograde coronary sinus cannula|
|US5364340 *||Jul 2, 1993||Nov 15, 1994||Coll Milton E||Ureteral stent-catheter having varying internal diameter and method of use|
|US5377690 *||Feb 9, 1993||Jan 3, 1995||C. R. Bard, Inc.||Guidewire with round forming wire|
|US5401244 *||Apr 28, 1994||Mar 28, 1995||Minnesota Mining And Manufacturing Company||Method of, and stylet apparatus for, installing a retrograde coronary cannula|
|US5409015 *||May 11, 1993||Apr 25, 1995||Target Therapeutics, Inc.||Deformable tip super elastic guidewire|
|US5480382 *||Sep 2, 1994||Jan 2, 1996||Pilot Cardiovascular Systems, Inc.||Steerable medical device|
|US5498251 *||Nov 29, 1994||Mar 12, 1996||Dalton; Michael J.||Tissue perfusion catheter|
|US5562722 *||Mar 14, 1994||Oct 8, 1996||Medical Evaluation Devices & Instruments Corp.||Multiple electrode catheter|
|US5573522 *||Sep 14, 1995||Nov 12, 1996||Ep Technologies, Inc.||Spring assembly for catheter|
|US5597378 *||Oct 2, 1992||Jan 28, 1997||Raychem Corporation||Medical devices incorporating SIM alloy elements|
|US5606981 *||Feb 3, 1995||Mar 4, 1997||C. R. Bard, Inc.||Catheter guidewire with radiopaque markers|
|US5607407 *||Aug 14, 1995||Mar 4, 1997||Tolkoff; Marc J.||Catheter assembly|
|US5636642 *||Apr 25, 1995||Jun 10, 1997||Target Therapeutics, Inc.||Deformable tip super elastic guidewire|
|US5658264 *||Nov 10, 1994||Aug 19, 1997||Target Therapeutics, Inc.||High performance spiral-wound catheter|
|US5690642 *||Jan 18, 1996||Nov 25, 1997||Cook Incorporated||Rapid exchange stent delivery balloon catheter|
|US5702373 *||Aug 31, 1995||Dec 30, 1997||Target Therapeutics, Inc.||Composite super-elastic alloy braid reinforced catheter|
|US5749837 *||Aug 1, 1996||May 12, 1998||Target Therapeutics, Inc.||Enhanced lubricity guidewire|
|US5769796 *||Jan 22, 1997||Jun 23, 1998||Target Therapeutics, Inc.||Super-elastic composite guidewire|
|US5772609 *||Jun 28, 1996||Jun 30, 1998||Target Therapeutics, Inc.||Guidewire with variable flexibility due to polymeric coatings|
|US5795341 *||Jun 7, 1995||Aug 18, 1998||Target Therapeutics, Inc.||High performance spiral-wound catheter|
|US5807339 *||Nov 29, 1996||Sep 15, 1998||Pacesetter Ab||Stylet unit for stiffening a hollow, flexible, elongated component|
|US5810790 *||Nov 19, 1996||Sep 22, 1998||Ebling; Wendell V.||Catheter with viewing system and port connector|
|US5853394 *||Dec 31, 1996||Dec 29, 1998||Tolkoff; Marc Joshua||Catheter|
|US5853400 *||Jun 3, 1997||Dec 29, 1998||Target Therapeutics, Inc.||High performance spiral-wound catheter|
|US5891112 *||Jun 7, 1995||Apr 6, 1999||Target Therapeutics, Inc.||High performance superelastic alloy braid reinforced catheter|
|US5891114 *||Sep 30, 1997||Apr 6, 1999||Target Therapeutics, Inc.||Soft-tip high performance braided catheter|
|US5902291 *||Sep 29, 1997||May 11, 1999||Ep Technologies, Inc.||Spring assembly for catheter|
|US5947940 *||Jun 23, 1997||Sep 7, 1999||Beisel; Robert F.||Catheter reinforced to prevent luminal collapse and tensile failure thereof|
|US5951539 *||Dec 19, 1997||Sep 14, 1999||Target Therpeutics, Inc.||Optimized high performance multiple coil spiral-wound vascular catheter|
|US5971975 *||Oct 9, 1996||Oct 26, 1999||Target Therapeutics, Inc.||Guide catheter with enhanced guidewire tracking|
|US6053903 *||Oct 6, 1998||Apr 25, 2000||Target Therapeutics, Inc.||High performance spiral-wound catheter|
|US6139510 *||May 11, 1994||Oct 31, 2000||Target Therapeutics Inc.||Super elastic alloy guidewire|
|US6143013 *||Apr 30, 1996||Nov 7, 2000||Target Therapeutics, Inc.||High performance braided catheter|
|US6152912 *||Jun 10, 1997||Nov 28, 2000||Target Therapeutics, Inc.||Optimized high performance spiral-wound vascular catheter|
|US6159187 *||Dec 6, 1996||Dec 12, 2000||Target Therapeutics, Inc.||Reinforced catheter with a formable distal tip|
|US6165163 *||Mar 26, 1999||Dec 26, 2000||Target Therapeutics, Inc.||Soft-tip performance braided catheter|
|US6210395||Oct 20, 1997||Apr 3, 2001||Lake Region Mfg., Inc.||Hollow lumen cable apparatus|
|US6217566||Oct 2, 1997||Apr 17, 2001||Target Therapeutics, Inc.||Peripheral vascular delivery catheter|
|US6306141||Jun 7, 1995||Oct 23, 2001||Medtronic, Inc.||Medical devices incorporating SIM alloy elements|
|US6340368||Oct 23, 1998||Jan 22, 2002||Medtronic Inc.||Implantable device with radiopaque ends|
|US6361557||Feb 3, 2000||Mar 26, 2002||Medtronic Ave, Inc.||Staplebutton radiopaque marker|
|US6398759||Oct 17, 2000||Jun 4, 2002||Alcon Manufacturing, Ltd.||Liquefracture handpiece tip|
|US6533770 *||Jan 21, 1998||Mar 18, 2003||Heartport, Inc.||Cannula and method of manufacture and use|
|US6648854||May 14, 1999||Nov 18, 2003||Scimed Life Systems, Inc.||Single lumen balloon-tipped micro catheter with reinforced shaft|
|US6676643||Mar 23, 2001||Jan 13, 2004||Nicor, Inc.||Anesthesia conduction catheter|
|US6685696||Feb 9, 2001||Feb 3, 2004||Lake Region Manufacturing, Inc.||Hollow lumen cable apparatus|
|US6689110||Nov 25, 2002||Feb 10, 2004||Micor, Inc.||Anesthesia conduction catheter|
|US6689120||Aug 4, 2000||Feb 10, 2004||Boston Scientific Scimed, Inc.||Reduced profile delivery system|
|US6733473||Jul 9, 1993||May 11, 2004||Boston Scientific Corporation||Adjustably stiffenable convertible catheter assembly|
|US6824553||Aug 25, 2000||Nov 30, 2004||Target Therapeutics, Inc.||High performance braided catheter|
|US7462177||Aug 29, 2003||Dec 9, 2008||Micor, Inc.||Anesthesia conduction catheter|
|US7815599||Dec 10, 2004||Oct 19, 2010||Boston Scientific Scimed, Inc.||Catheter having an ultra soft tip and methods for making the same|
|US7883474||Apr 30, 1996||Feb 8, 2011||Target Therapeutics, Inc.||Composite braided guidewire|
|US8353849||Aug 8, 2008||Jan 15, 2013||Terumo Kabushiki Kaisha||Guide wire|
|US8708932||Sep 14, 2012||Apr 29, 2014||Terumo Kabushiki Kaisha||Guide wire|
|US8973239||Oct 18, 2010||Mar 10, 2015||Boston Scientific Scimed, Inc.||Catheter having an ultra soft tip and methods for making the same|
|US9017246||Nov 17, 2011||Apr 28, 2015||Boston Scientific Scimed, Inc.||Biliary catheter systems including stabilizing members|
|US9717554||Mar 26, 2012||Aug 1, 2017||Biosense Webster (Israel) Ltd.||Catheter with composite construction|
|US20030191453 *||Apr 3, 2003||Oct 9, 2003||Velez Omar E.||Catheter assembly|
|US20040260271 *||Jun 17, 2004||Dec 23, 2004||Huyser Richard F.||Extended fenestration catheter with internal coil and method of making the same|
|US20050027249 *||May 11, 2004||Feb 3, 2005||Boston Scientific Corporation, A Delaware Corporation||Adjustably stiffenable convertible catheter assembly|
|US20060129178 *||Jan 31, 2006||Jun 15, 2006||Nikolaus Reifart||Adjustably stiffenable convertible catheter assembly|
|US20080306468 *||Aug 8, 2008||Dec 11, 2008||Terumo Kabushiki Kaisha||Guide Wire|
|US20090018502 *||Aug 4, 2008||Jan 15, 2009||Nikolaus Reifart||Adjustably Stiffenable Convertible Catheter Assembly|
|US20100318095 *||Jun 22, 2010||Dec 16, 2010||Safe Bt, Inc.||Anesthesia conduction catheter for delivery of electrical stimulus|
|US20110144625 *||Feb 7, 2011||Jun 16, 2011||Target Therapeutics, Inc.||Composite Braided Guidewire|
|US20140088560 *||Mar 30, 2012||Mar 27, 2014||Cornell University||Intra-luminal access apparatus and methods of using the same|
|CN103533983A *||Mar 30, 2012||Jan 22, 2014||康奈尔大学||Intra-luminal access apparatus and methods of using the same|
|DE4130042A1 *||Sep 10, 1991||Mar 11, 1993||Elky Ges Fuer Tech Entwicklung||Catheter guide wire for drainage or perfusion - has manipulatable spring coils to allow fluid passage|
|EP0063859A2 *||Mar 3, 1982||Nov 3, 1982||American Hospital Supply Corporation||Infusion catheter|
|EP0063859A3 *||Mar 3, 1982||Dec 1, 1982||American Hospital Supply Corporation||Infusion catheter|
|EP0082504A1 *||Dec 17, 1982||Jun 29, 1983||Sterimed Gesellschaft für medizinischen Bedarf mbH||Catheter for the catheterisation of central veins|
|EP0141006A1 *||Jan 27, 1984||May 15, 1985||Terumo Kabushiki Kaisha||Guide wire for catheter|
|EP0435518A1 *||Dec 13, 1990||Jul 3, 1991||Med Institute, Inc.||A flexible, kink-resistant catheter|
|EP0532109A1 *||Sep 8, 1992||Mar 17, 1993||Cordis Europa N.V.||Double lumen catheter|
|EP0715863A2||Nov 10, 1995||Jun 12, 1996||Target Therapeutics, Inc.||Catheter|
|EP0778044A2||Dec 3, 1996||Jun 11, 1997||Pacesetter AB||Guidewire unit|
|EP0778044A3 *||Dec 3, 1996||Jul 9, 1997||Pacesetter AB||Guidewire unit|
|EP1992383A1 *||Mar 6, 2007||Nov 19, 2008||Terumo Kabushiki Kaisha||Guide wire|
|EP1992383A4 *||Mar 6, 2007||Apr 8, 2009||Terumo Corp||Guide wire|
|EP2691141A2 *||Mar 30, 2012||Feb 5, 2014||Cornell University||Intra-luminal access apparatus and methods of using the same|
|EP2691141A4 *||Mar 30, 2012||Aug 27, 2014||Univ Cornell||Intra-luminal access apparatus and methods of using the same|
|WO1980002231A1 *||Apr 24, 1980||Oct 30, 1980||J Donachy||Long-life flexible electrode lead|
|WO1983002064A1 *||Dec 17, 1982||Jun 23, 1983||Kramann, Bernhard||Catheter for central veins|
|WO1991017782A1 *||May 17, 1991||Nov 28, 1991||Target Therapeutics||Catheter with low-friction distal segment|
|WO1992021398A1 *||Jun 5, 1992||Dec 10, 1992||Taut, Incorporated||Uncollapsible catheter and methods|
|WO1998022176A1 *||Nov 18, 1997||May 28, 1998||Daig Corporation||Guiding introducer with openings containing ablation catheter|
|WO1998058696A1||Jun 22, 1998||Dec 30, 1998||Beisel Robert F||Catheter reinforced to prevent luminal collapse and tensile failure|
|WO2001070322A1||Mar 23, 2001||Sep 27, 2001||Stephen Brushey||Anesthesia conduction catheter|
|U.S. Classification||600/434, 604/95.1|
|International Classification||A61M25/09, A61M25/06, A61M25/01|
|Cooperative Classification||A61M25/0662, A61M25/09041, A61M25/09025|
|European Classification||A61M25/09B1, A61M25/09C, A61M25/06H|
|Aug 11, 1980||AS99||Other assignments|
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