|Publication number||US2437542 A|
|Publication date||Mar 9, 1948|
|Filing date||May 5, 1944|
|Priority date||May 5, 1944|
|Publication number||US 2437542 A, US 2437542A, US-A-2437542, US2437542 A, US2437542A|
|Inventors||Louis H Krippendorf|
|Original Assignee||American Catheter Corp|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (122), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
March 1948. H. KRIPPEQNDORF 2,437,542
CATHETER-TYPE INSTRUMENT Filed May 5, 1944 GREATER FLEXIBILITY IMPREGNATED DMPREGNATED THREADS MORE I THREADS MORE WITH MED\UM #1 WITH MEDIUM #2 LOOSELY NTERTWINED CLOSELY INTERTWINED INVENTOR Louzb'liKz'z b oendwf B ,lwkm a ATTORNE 3 Patented Mal. 9,
ky e-14 u at CATHETER-TYPE INSTRUMENT Louis H. Krippendorf, White Plains, N. Y., as-
signor to American Catheter Corporation, Port Chester, N. Y., a corporation 01' New York Application May 5, 1944, Serial No. 534,207
2 Claims. 1
My present invention relates generally to surgical instruments and has particular reference to catheter-type instruments.
By the term catheter-type instruments, as used herein and in the appended claims, I intend to refer to the well-known kind of device which is inserted endwise into and through constricted body channels for diagnostic, therapeutic and allied purposes. Illustrative of such instruments are ureteral and urethral catheters, bougies, filiforms, and the like.
A conventional instrument of this type is of elongated character and has a uniform over-all flexibility coupled with sufficient rigidity to permit its endwise advancement. This paradoxical requirement for both flexibility and rigidity has heretofore presented a peculiar problem to the manufacturer. For example, in the case of a ureteral catheter, it must be of suflicient flexibility to permit the tip of the instrument to advance harmlessly through the constricted ureteral canal and readily to follow the curvatures encountered, yet as the flexibility is increased by the manufacturer to meet this requirement, the body portion loses some of the rigidity necessary to enable the operator to eflect the desired advancement by endwise pressure exerted upon the rear end of the instrument. Similarly, in the case of bougies or the like, it may under certain circumstances be desirable to increase the rigidity of the tip portion, yet the instrument as a whole may thereby become too inflexible to follow an irregularly curved path with adequate ease.
The principal object of my present invention is directed toward a solution of this problem, and my invention is predicated upon the discovery that a catheter-type instrument may be caused to embody diflerent flexibilities along its longi tudinal axis without materially altering its basic structural nature or impairing the other inherent qualities which it necessarily must possess. This desirable and advantageous result is achieved in an entirely practical and commercially-feasible manner,
In accordance with one conventional manufacturing procedure, the construction or a cathetertype instrument involves the formation of an initially limp fabric base or intertwined threads, this base being usually first impregnated with a flexible stiii'ening medium and then coated with a flexible varnish. In the practice of my present invention, this general procedure is adhered to,
'yet the body portion of the resultant instrument may be caused to embody a flexibility in the forward or other section thereof which is to a pre- 2 determined extent appreciably greater or less than the flexibility in an adjacent section.
This new result, and its corresponding advantages, may be accomplished in several ways, as illustratively exemplified in the following description and in the accompanying drawings in which:
Figure 1 is a perspective view of a typical catheter-type instrument illustrating the features of my present invention;
Figure 2 is an enlarged fragmentary view of a portion of the instrument with the outer coating broken away to reveal the fabric base, illustrating the preferred structure;
Figure 3 is a view similar to Figure 2 illustrating a modification;
Figure 4 is a view similar to Figure 2 illustrating a further modification; and
Figure 5 is a diagrammatic view illustrating the comparative characteristics, so far as flexibility is concerned, of a conventional cathetertype instrument and one which has been constructed in accordance with the present invention.
The features of my present invention may best be described by brief preliminary reference to convention-a1 practice.
A fabric base is first created. Usually, this base assumes the form of an elongated hollow tube, but under certain circumstances it need not have a longitudinal passageway extending through it. is formed of wined threads or slrk, c o ttp r or g nthetic flbra d the threads are braided into the desired relationship. Any weaving or other procedure may be resorted to, however, if desired, although braiding machines have proven to be admirably suited to produce a tubular or elongated fabric base or the character required. This base is initially limp in character, and is customarly impregnated with a flexible stifiening medium of suitable composition. Where the base is a tube, the imp egnation is carried out while the tube is mounted upon a suitable rod or mandrel. After wiping of! any excess, the mandrel (ii! one has been used) is removed and the imp ng medium is causedtohardenorpurefe'ither by air drying, orby subjection to a baking procedure or the like. The reinforced and strengthened fabric base is then subjected to a. series of operations during which a flexible tough varnish coating is applied to it, layer by layer, the successive coatings being cured by baking or analogous procedures. After the desired coating has been formed, it is burnished and the instrument is subjected to such other finishing processes as may be deemed desirable.
The forward tip of the instrument may be formed either prior to or after the initial impregnation of the fabric base, depending upon the nature of the instrument, and the kind and shape of tip which it is intended to have. In the case of catheters, the several openings or eyes which characterize these instruments may be formed at or near the forward tip either during the braiding of the base or during a subsequent stage of treatment.
Depending upon the nature and size of the threads originally employed in forming the fabric base, upon the dimensions of this base and upon the impregnating and coating media which are employed, the resultant instrument will have a size and flexibility of predetermined character. Heretofore, in an instrument in which the body portion is of substantially uniform diameter, the bendability and over-all semi-rigidity has been uniform throughout, being usually determined by a suitable compromise between the flexibility required for any given purpose and the stiffness called for by the Well-known method in which the instrument is to be employed.
In accordance with my invention, the essential nature of the manufacturing process remains unchanged, yet varying degrees of flexibility may be imparted to the resultant instrument along its longitudinal axis. This result may be achieved in various ways, and for illustrative purposes, I have chosen to describe and illustrate the manner in which a catheter may be caused to have an appreciably increased flexibility in its forward region adjacent to the tip, as compared with the flexibility and rigidity of the remaining main portion thereof.
Thus, in Figure 1, I have illustrated a catheter ID in which the region forwardly of the dot-anddash line A has been caused to embody a greater flexibility than the remaining main portion of the catheter.
The Preferred procedure is illustrated in Figure 2 in which I have illustrated the structure, on an exaggereated scale, in the vicinity of the dotand-dash line A. It involves a slight modification in the process of impregnating the fabric base tube II with a flexible stiffening medium.
Instead of impregnating the entire tube in one step, I first impregnate one selected section thereof, permitting or causing the medium to be cured, after which another selected section is similarly impregnated, the tw impre ating media being of suitably ehos'zenldtifiejenfigr ziposi- .other customary ingredients. There are numerous resins which can be employed, and among them are, for example, resins of the phenolic type. The was; used may be any of the usual ones, such as casto dibutyl phthalate, tri-cresyl-phospha I e.
In-ac actice, assuming that the fabric tube is to be employed in the manufacture of the catheter l0 shown in Figure 1 in which the forward region is to embody greater flexibility than the remainder, the tube may be mounted on a suitable rod or mandrel (not shown) either before or after the forward tip is formed, and may then be dipped vertically into the first impregnating medium, up to the approximate line A where the greater flexibility is to stop. The excess is then wiped off and the partially impregnated tube may be placed in a suitable oven to bring about 9. ouring of the impregnating medium. The entire tube may then be immersed bodily into a bath of the second impregnating medium whereby the balance of the tube becomes impregnated, and after wiping off any excess from the outside surface, the rod .or mandrel is withdrawn and the tube is placed in a suitable oven to bring about the desired curing. Subsequently, the tube is handled in the usual fashion to form on it the outer coating 12 of flexible varnish, which may be composed, for example, of a tung oil base, a Phenolic resin, and a suitable plasticlzer.
In preparing the two impregnating media referred to in the preceding Daragraph -the one which is to have the greater flexibility will contain more. of the plasticizingingredient, while the otherdne-wiir'c'oritain relatively less plasticizer.
One of the advantages of this procedure lies in the fact that the initial partial dipping-of the tube is accompanied by a capillary action which introduces the first impregnating medium in gradually-diminishing amounts into the region rearwardly of the line A, whereby the finished product is devoid of any undesirable clean-cut line of demarkation between the region of greater flexibility and the remaining portion of the instrument.
In Figure 3 I have illustrated another means whereby the desired effect may be achieved. In this case, the fabric base tube I3 is so braided or otherwise formed that the threads in the region rearwardly of the line A1 are more closely intertwined than in the region forwardly of this line whereby the flexibility of one region is different from the other. Where the tube is formed by means of a braiding machine, this result can be brought about by adjustments of the braiding machine during the course of its operation.
The base thus formed need not necessarily be subjected to two successive preliminary impregnations, and the ordinary manufacturing procedure may be followed to impregnate the base with a flexible stiffening medium, and ultimately to form on it the outer coating 14 of flexible varnish. 'I'he stiffening medium and the varnish may each be of the same general composition hereinbefore referred to. It will be understood, however, that the two-stage impregnation described in connection with Figure 2 may be combined, if desired, with the modification of the base tube itself as illustrated and described in connection with Figure 3.
In Figure 4. I have illustrated another illustrative procedure in which the base tube is formed of two separate portions l5 and I5 arranged in overlapping nested relationship. These portions may be formed of different materials or may be composed of threads of the same material but having different calibres. Or, if desired, both the material of the threads, and their calibres may be different. In any case, the portion I5 is caused to embody an inherent structure which is suitably diflerent from the portion It so that after impregnation and curing, these two portions will exhibit appreciably different flexibilities.
In the creation of an instrument as shown in Figure 4, the overlapping of the portions l5 and I6 is brought about in the region of the line A2 in such a manner that the forward section of the resultant instrument will be of appreciably greater flexibility than the r maining portion.
In practice, the separate portions of the base tube may be brought into the overlapping relationship shown during the course of the braiding procedure, This composite base tube may then be subjected to the usual steps of impregnation and coating to form the flexible varnish coating 11 (which may be of the same general composition hereinbefore referred to), and in the finished instrument it will be found that the exterior surface of this coating is entirely smooth and uniform despite the overlap in the interior, which is shown on an exaggerated scale in Figure 4.
Obviously, if desired, one or the other of the portions 15 and I6 may be more loosely or more closely intertwined, to enhance the differences in flexibility which are to be achieved; and the procedure described in connection with Figure 2 may be combined with this overlapping base tube structure if the results to be achieved justify a two-stage impregnation.
Another way of accomplishing the desired result lies in curing the varnish coating to a greater extent in one section than in another. For example', in producing a catheter having the characteristics shown in Figure 1, the normal and conventional procedure may be followed throughout, and the rearward part of the instrument may then be subjected to an additional baking or curing whereby a greater rigidity is imparted to it. In practice, this may be accomplished by dipping the forward region in a suitable oil or other liquid while the entire instrument is subjected to a baking temperature.
Usually, the coating is of resinous character, adequate to produce a tough flexible film having a smooth glossy surface and resistant to water, body fluids generally, and standard types of sterilization.
The basic diiference between the instrument of Figure 1 and the ordinary type of instrument is indicated diagrammatically in Figure 5. If the ordinary catheter I8 is pressed endwise against an abutment wall l9, by pressure exerted in the direction indicated by the arrow 20, it will buckle throughout its length. On the other hand, if the instrument In of Figure 1 is similarly pressed against an abutment l9 by a similar pressure exerted along the direction of the arrow 2|, it will buckle in the forward region of greater flexibility, but not otherwise. Accordingly. when the instrument I0 is inserted into and advanced through one of the ureters or through any other similar constricted body canal, it will feel its way more easily past the curvatures encountered, and this makes the operation safer and simpler.
While I have illustrated a catheter, it will be understood that the invention is equally applicable to any catheter-type instrument, whether,
hollow or not; and while I have chosen to illustrate the manner in which the forward region of the instrument may be made more flexible than the balance, it will be understood that other relative flexibilities may be produced, depending upon particular requirements.
In general it will be understood that the details herein described and illustrated to explain the general nature and objective of the invention may readily be modified by those skilled in the art without departing from the spirit and scope of the invention as expressed in the appended claims.
Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is:
1. In an elongated flexible catheter-type instrument, an initially limp fabric base impregnated with a flexible stiffening medium, said medium in one region of said base being of appreciably greater flexibility than in a longitudinally-adjacent region thereof, the flexibilities of the corresponding sections of the instrument being correspondingly afiected.
2. In an elongated flexible catheter-type instrument, an initially limp fabric base impregnated with a flexible stiffening medium, said medium in the forward region of said base being of appreciably greater flexibility than in the adjacent rearward region, the flexibilities of the corresponding sections of the instrument being correspondingly affected.
LOUIS H. ICRIPPENDORF.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 204,905 Lockwood June 18, 1878 309,177 Lee Sept. 25, 1888 1,776,879 Baekeland Sept. 30, 1930 2,237,218 Flynn Apr. 1, 1941 FOREIGN PATENTS Number Country Date 8,249 Great Britain July 7, 1885 372,096 France Mar. 23, 1907 476,004 France July 7, 1915 163,694 Switzerland Nov. 1, 1933
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US204905 *||Jun 18, 1878||Improvement in india-rubber surgical tubes|
|US309177 *||Dec 9, 1884||Es Op One||Oes op one-thibd to david p|
|US1776879 *||Jan 28, 1926||Sep 30, 1930||Bakelite Corp||Impregnated and coated fabric|
|US2237218 *||Sep 29, 1938||Apr 1, 1941||Wardlyn Corp||Application of cellulose derivatives|
|CH163694A *||Title not available|
|FR372096A *||Title not available|
|FR476004A *||Title not available|
|GB188508249A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2472483 *||Dec 10, 1947||Jun 7, 1949||American Catheter Corp||Catheter-type instrument|
|US2472484 *||Dec 10, 1947||Jun 7, 1949||American Catheter Corp||Catheter-type instrument|
|US2472485 *||Dec 10, 1947||Jun 7, 1949||American Catheter Corp||Catheter-type instrument|
|US2661003 *||Nov 20, 1952||Dec 1, 1953||Carroll Bruce J||Varicose vein stripper with flexible guide leader|
|US3007809 *||Jun 20, 1958||Nov 7, 1961||Permalastic Products Co||Process of making reinforced flexible plastic tubing|
|US3924632 *||Jun 17, 1974||Dec 9, 1975||William A Cook||Fiber glass reinforced catheter|
|US4265926 *||Feb 10, 1978||May 5, 1981||Sperti George S||Method of treating gelatin capsules and product resulting therefrom|
|US4311133 *||Mar 10, 1980||Jan 19, 1982||Thoratec Laboratories Corporation||Intra-aortic balloon|
|US4329980 *||Feb 25, 1980||May 18, 1982||Olympus Optical Co., Ltd.||Flexible sheath for an endoscope|
|US4464176 *||Jun 4, 1982||Aug 7, 1984||Mallinckrodt, Inc.||Blood vessel catheter for medicine delivery and method of manufacture|
|US4516972 *||Aug 12, 1983||May 14, 1985||Advanced Cardiovascular Systems, Inc.||Guiding catheter and method of manufacture|
|US4634432 *||May 13, 1985||Jan 6, 1987||Nuri Kocak||Introducer sheath assembly|
|US4651751 *||Oct 5, 1984||Mar 24, 1987||American Hospital Supply Corporation||Guiding catheter and method of use|
|US4990143 *||Apr 9, 1990||Feb 5, 1991||Sheridan Catheter Corporation||Reinforced medico-surgical tubes|
|US5037404 *||Nov 14, 1988||Aug 6, 1991||Cordis Corporation||Catheter having sections of variable torsion characteristics|
|US5095915 *||Mar 19, 1990||Mar 17, 1992||Target Therapeutics||Guidewire with flexible distal tip|
|US5156785 *||Jul 10, 1991||Oct 20, 1992||Cordis Corporation||Extruded tubing and catheters having increased rotational stiffness|
|US5248305 *||Aug 24, 1992||Sep 28, 1993||Cordis Corporation||Extruded tubing and catheters having helical liquid crystal fibrils|
|US5358493 *||Feb 18, 1993||Oct 25, 1994||Scimed Life Systems, Inc.||Vascular access catheter and methods for manufacture thereof|
|US5454795 *||Jun 27, 1994||Oct 3, 1995||Target Therapeutics, Inc.||Kink-free spiral-wound catheter|
|US5478330 *||Mar 11, 1994||Dec 26, 1995||Cardiac Pathways Corporation||Steerable catheter with adjustable bend location and/or radius and method|
|US5496294 *||Jul 8, 1994||Mar 5, 1996||Target Therapeutics, Inc.||Catheter with kink-resistant distal tip|
|US5507995 *||Jul 12, 1994||Apr 16, 1996||Scimed Life Systems, Inc.||Process for making a catheter|
|US5599326 *||Dec 20, 1994||Feb 4, 1997||Target Therapeutics, Inc.||Catheter with multi-layer section|
|US5599492 *||Dec 16, 1994||Feb 4, 1997||Target Therapeutics, Inc.||Method for making a guidewire with a flexible distal tip|
|US5658264 *||Nov 10, 1994||Aug 19, 1997||Target Therapeutics, Inc.||High performance spiral-wound catheter|
|US5662622 *||Apr 4, 1995||Sep 2, 1997||Cordis Corporation||Intravascular catheter|
|US5695483 *||Aug 17, 1995||Dec 9, 1997||Target Therapeutics Inc.||Kink-free spiral-wound catheter|
|US5702373 *||Aug 31, 1995||Dec 30, 1997||Target Therapeutics, Inc.||Composite super-elastic alloy braid reinforced catheter|
|US5711909 *||May 9, 1996||Jan 27, 1998||Cordis Corporation||Intravascular catheter and method of manufacturing|
|US5733400 *||May 8, 1996||Mar 31, 1998||Cordis Corporation||Intravascular catheter|
|US5762995 *||Jul 25, 1996||Jun 9, 1998||Fuji Photo Optical Co., Ltd.||Flexible sheathing tube construction, and method for fabrication thereof|
|US5782811 *||May 30, 1996||Jul 21, 1998||Target Therapeutics, Inc.||Kink-resistant braided catheter with distal side holes|
|US5795341 *||Jun 7, 1995||Aug 18, 1998||Target Therapeutics, Inc.||High performance spiral-wound 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|
|US5927345 *||Apr 30, 1996||Jul 27, 1999||Target Therapeutics, Inc.||Super-elastic alloy braid structure|
|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|
|US6004310 *||Jun 17, 1998||Dec 21, 1999||Target Therapeutics, Inc.||Multilumen catheter shaft with reinforcement|
|US6090099 *||May 24, 1996||Jul 18, 2000||Target Therapeutics, Inc.||Multi-layer distal catheter section|
|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|
|US6197014||Mar 11, 1998||Mar 6, 2001||Target Therapeutics, Inc.||Kink-resistant braided catheter with distal side holes|
|US6217566||Oct 2, 1997||Apr 17, 2001||Target Therapeutics, Inc.||Peripheral vascular delivery catheter|
|US6258080||Nov 18, 1998||Jul 10, 2001||Target Therapeutics, Inc.||Kink-free spiral-wound catheter|
|US6368316||Jun 11, 1998||Apr 9, 2002||Target Therapeutics, Inc.||Catheter with composite stiffener|
|US6500202 *||Mar 15, 2000||Dec 31, 2002||Endologix, Inc.||Bifurcation graft deployment catheter|
|US6508835||Nov 28, 2000||Jan 21, 2003||Endologix, Inc.||Endoluminal vascular prosthesis|
|US6648854||May 14, 1999||Nov 18, 2003||Scimed Life Systems, Inc.||Single lumen balloon-tipped micro catheter with reinforced shaft|
|US6660030||Dec 22, 2000||Dec 9, 2003||Endologix, Inc.||Bifurcation graft deployment catheter|
|US6689120||Aug 4, 2000||Feb 10, 2004||Boston Scientific Scimed, Inc.||Reduced profile delivery system|
|US6689157||Dec 21, 2001||Feb 10, 2004||Endologix, Inc.||Dual wire placement catheter|
|US6733523||Jun 26, 2001||May 11, 2004||Endologix, Inc.||Implantable vascular graft|
|US6824553||Aug 25, 2000||Nov 30, 2004||Target Therapeutics, Inc.||High performance braided catheter|
|US6951572||Aug 12, 2003||Oct 4, 2005||Endologix, Inc.||Bifurcated vascular graft and method and apparatus for deploying same|
|US6953475||Sep 30, 2003||Oct 11, 2005||Endologix, Inc.||Bifurcation graft deployment catheter|
|US7104979||Feb 19, 2002||Sep 12, 2006||Target Therapeutics, Inc.||Catheter with composite stiffener|
|US7615043||Jun 23, 2004||Nov 10, 2009||Boston Scientific Scimed, Inc.||Medical device incorporating a polymer blend|
|US7704245||Apr 13, 2004||Apr 27, 2010||Cook Incorporated||Large diameter delivery catheter/sheath|
|US7815599||Dec 10, 2004||Oct 19, 2010||Boston Scientific Scimed, Inc.||Catheter having an ultra soft tip and methods for making the same|
|US7824392||Aug 20, 2003||Nov 2, 2010||Boston Scientific Scimed, Inc.||Catheter with thin-walled braid|
|US7841994||Nov 2, 2007||Nov 30, 2010||Boston Scientific Scimed, Inc.||Medical device for crossing an occlusion in a vessel|
|US7909812||Sep 6, 2006||Mar 22, 2011||Target Therapeutics, Inc.||Catheter with composite stiffener|
|US7968038||Mar 8, 2010||Jun 28, 2011||Cook Medical Technologies Llc||Large diameter delivery catheter/sheath|
|US8034100||Nov 25, 2003||Oct 11, 2011||Endologix, Inc.||Graft deployment system|
|US8118856||Jul 27, 2010||Feb 21, 2012||Endologix, Inc.||Stent graft|
|US8147535||Jul 25, 2005||Apr 3, 2012||Endologix, Inc.||Bifurcation graft deployment catheter|
|US8167925||Mar 25, 2010||May 1, 2012||Endologix, Inc.||Single puncture bifurcation graft deployment system|
|US8216295||Jul 1, 2009||Jul 10, 2012||Endologix, Inc.||Catheter system and methods of using same|
|US8236040||Apr 11, 2008||Aug 7, 2012||Endologix, Inc.||Bifurcated graft deployment systems and methods|
|US8251976||Oct 27, 2009||Aug 28, 2012||Boston Scientific Scimed, Inc.||Medical device incorporating a polymer blend|
|US8317772||Mar 10, 2011||Nov 27, 2012||Target Therapeutics, Inc.||Catheter with composite stiffener|
|US8357192||Mar 11, 2011||Jan 22, 2013||Endologix, Inc.||Bifurcated graft deployment systems and methods|
|US8377035||Jan 17, 2003||Feb 19, 2013||Boston Scientific Scimed, Inc.||Unbalanced reinforcement members for medical device|
|US8491646||Jul 15, 2010||Jul 23, 2013||Endologix, Inc.||Stent graft|
|US8523931||Jan 12, 2007||Sep 3, 2013||Endologix, Inc.||Dual concentric guidewire and methods of bifurcated graft deployment|
|US8764812||Jan 18, 2013||Jul 1, 2014||Endologix, Inc.||Bifurcated graft deployment systems and methods|
|US8795255||Nov 12, 2012||Aug 5, 2014||Boston Scientific Scimed, Inc.||Catheter with composite stiffener|
|US8808350||Feb 29, 2012||Aug 19, 2014||Endologix, Inc.||Catheter system and methods of using same|
|US8821564||Feb 16, 2012||Sep 2, 2014||Endologix, Inc.||Stent graft|
|US8945202||Apr 28, 2010||Feb 3, 2015||Endologix, Inc.||Fenestrated prosthesis|
|US8973239||Oct 18, 2010||Mar 10, 2015||Boston Scientific Scimed, Inc.||Catheter having an ultra soft tip and methods for making the same|
|US20020123738 *||Feb 19, 2002||Sep 5, 2002||Target Therapeutics, Inc.||Catheter with composite stiffener|
|US20040064146 *||Sep 30, 2003||Apr 1, 2004||Shaolian Samuel M.||Bifurcation graft deployment catheter|
|US20040143239 *||Jan 17, 2003||Jul 22, 2004||Scimed Life Systems, Inc.||Unbalanced reinforcement members for medical device|
|US20040167618 *||Nov 25, 2003||Aug 26, 2004||Shaolian Samuel M.||Graft deployment system|
|US20040220549 *||Apr 13, 2004||Nov 4, 2004||Dittman Jay A.||Large diameter delivery catheter/sheath|
|US20040230295 *||Jan 26, 2004||Nov 18, 2004||Shaolian Samuel M.||Implantable vascular graft|
|US20050043713 *||Aug 20, 2003||Feb 24, 2005||Scimed Life Systems, Inc.||Catheter with thin-walled braid|
|US20050043714 *||Jun 23, 2004||Feb 24, 2005||Scimed Life Systems, Inc.||Medical device incorporating a polymer blend|
|US20050090802 *||Apr 26, 2004||Apr 28, 2005||Connors John J.Iii||Flexible sheath with varying durometer|
|US20050271844 *||Jun 7, 2004||Dec 8, 2005||Scimed Life Systems, Inc.||Artificial silk reinforcement of PTCA balloon|
|US20050288772 *||Aug 29, 2005||Dec 29, 2005||Douglas Myles S||Bifurcated vascular graft and method and apparatus for deploying same|
|US20060020320 *||Jul 25, 2005||Jan 26, 2006||Shaolian Samuel M||Bifurcation graft deployment catheter|
|US20060111649 *||Nov 19, 2004||May 25, 2006||Scimed Life Systems, Inc.||Catheter having improved torque response and curve retention|
|US20060129176 *||Dec 10, 2004||Jun 15, 2006||Scimed Life Systems, Inc.||Catheter having an ultra soft tip and methods for making the same|
|US20070049903 *||Sep 6, 2006||Mar 1, 2007||Target Therapeutics, Inc.||Catheter with composite stiffener|
|US20070083132 *||Oct 11, 2005||Apr 12, 2007||Sharrow James S||Medical device coil|
|US20070110935 *||Jan 10, 2007||May 17, 2007||Boston Scientific Scimed, Inc.||Silk reinforcement of expandable medical balloons|
|US20070299497 *||Jun 18, 2007||Dec 27, 2007||Endologix, Inc.||Implantable vascular graft|
|US20080071343 *||Sep 15, 2006||Mar 20, 2008||Kevin John Mayberry||Multi-segmented graft deployment system|
|US20080172122 *||Jan 12, 2007||Jul 17, 2008||Mayberry Kevin J||Dual concentric guidewire and methods of bifurcated graft deployment|
|US20090105806 *||Oct 23, 2008||Apr 23, 2009||Endologix, Inc||Stent|
|US20090118644 *||Nov 2, 2007||May 7, 2009||Boston Scientific Scimed, Inc.||Medical device for crossing an occlusion in a vessel|
|US20100108075 *||Mar 13, 2008||May 6, 2010||Willy Rusch Gmbh||Tracheal or Tracheostomy Tubular Arrangement|
|US20100163159 *||Mar 8, 2010||Jul 1, 2010||Cook Incorporated||Large diameter delivery catheter/sheath|
|US20100280588 *||Nov 4, 2010||Endologix, Inc.||Percutaneous method and device to treat dissections|
|US20110035927 *||Feb 17, 2011||Boston Scientific Scimed, Inc.||Catheter Having an Ultra Soft Tip and Methods for Making the Same|
|US20110054587 *||Mar 3, 2011||Endologix, Inc.||Apparatus and method of placement of a graft or graft system|
|US20110172643 *||Jul 14, 2011||Target Therapeutics, Inc.||Catheter with Composite Stiffener|
|DE102009023661A1 *||Jun 3, 2009||Dec 16, 2010||Acandis Gmbh & Co. Kg||Medizinischer Katheter, medizinisches Funktionselement und Anordnung umfassend einen derartigen Katheter und ein derartiges Funktionselement|
|EP0715863A2||Nov 10, 1995||Jun 12, 1996||Target Therapeutics, Inc.||Catheter|
|WO1986005403A1 *||Mar 11, 1986||Sep 25, 1986||Univ Manchester||A urethral catheter|
|WO1998015311A1||Oct 7, 1997||Apr 16, 1998||Engelson Erik T||Guide catheter with enhanced guidewire tracking|
|WO1998024502A1||Dec 8, 1997||Jun 11, 1998||Henry Nita||Reinforced catheter with a formable distal tip|
|WO1998056448A1||Jun 9, 1998||Dec 17, 1998||Eric T Engelson||Optimized high performance multiple coil spiral-wound vascular catheter|
|WO1999016494A1||Sep 29, 1998||Apr 8, 1999||Boston Scient Ltd||Soft-tip high performance braided catheter|
|WO1999017826A1||Oct 1, 1998||Apr 15, 1999||Jose D Alejandro||Peripheral vascular delivery catheter|
|U.S. Classification||138/118, 427/2.3, 427/2.1, 604/525|