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Publication numberUS2211975 A
Publication typeGrant
Publication dateAug 20, 1940
Filing dateMar 16, 1937
Priority dateMar 16, 1937
Publication numberUS 2211975 A, US 2211975A, US-A-2211975, US2211975 A, US2211975A
InventorsFloyd C Hendrickson
Original AssigneeFloyd C Hendrickson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Catheter
US 2211975 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

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CATHETER Filed March 16, 1937 Raienied Aug. 20, 1940 UNITED STATES PATENT OFFICE CATHETER Floyd 0. Hendrickson, Canton, Ohio Application March 1 6, 1937, Serial No. 131,125

2 Claims.

This invention relates to catheters and similar tubular appliances for surgical or other uses, and has for its principal objects the provision of a superior catheter construction providing maximum.interior diameter or cross-sectional area with minimum wall thickness and minimum outside diameter together with desira le transverse rigidity to resist collapse and also a certain amount of longitudinal rigidity, especially in the tip of the catheter, to facilitate insertion of the frequently rather long and slender catheter into a restricted tubular passage such as a male urethra, and generally to provide economy and efliciency in catheter constructions.

The manner in which these and other objects of the invention are attained w ll appear from the following description of the invention in which reference will be had to the accompanying drawing of which Fig. 1 is an elevation, partially broken away for clarity of illustration, showing a catheter embodying the principles of the present invention;

Fig. 2 is a sectional elevation, on an enlarged scale, illustrating more clearly constructional details of the tip portion of the catheter of Fig. 1.

Fig. 3 is a vertical section taken on line 3-3 of Fig. l.

For purposes of illustration, I have shown my invention in a preferred form embodied in a urethral catheter comprising a relatively long and slender thin-walled rubber tube l having a closed tip end H and an enlarged open end l2 adjacent which the rubber wall of the tube is made considerably heavier for a short distance to provide a tube-gripping connector portion l3. Drainage openings l4, H are provided in the tube wall, preferably in diametrically opposed positions, adjacent the tip end ll of the tube i0. Embedded wholly within the wall of the thinwalled tubular portion of the catheter and extending substantially from the end of the tubegripping connection portion l3 to a point a short distance from the drainage openings l4, I4, is provided a reenforcing coil l5 of, for example, spring steel wire providing a high degree of transverse rigidity and effectively preventing collapse of the tube, which in prior devices often occurs as a result of bending or other collapsing pressure while in use, and also imparting to the catheter a considerable amount of longitudinal rigidity without however destroying its flexibility..

For imparting greater longitudinal rigidity to the tip of the catheter into which the wire coil 15 does not extend and which is weakened considerably by the cut-out drainage apertures, a

the ends of the two legs of the U.

To provide additional rigidity in the catheter tip, and especially to provide resistance to puncture by the sound or stylet customarily used for facilitating insertion of the" catheter, the rubber wall at the tip and adjacent areas, preferably at least as far as the end of the wire coil l5, may be made heavier and thicker as more clearly shown in Fig. 2, to provide a wall say about twice as thick as the wall of the tube proper.

For ordinary catheters, the coil wire reenforcing element l5 and-the U shaped tip reenforcing element l6 may be formed of stainless steel wire of about 0.007 inch gauge, the coil preferably having a low pitch, for example 20 Cells to the inch. With such a reenforcing ele- 'ment, an overall catheter wall thickness of as low as 0.03 to 0.05 inch is regularly used and has been found to be entirely reliable and wholly satisfactory. Substantial advantages are noted even with walls as thick as 0.10 inch. Such a slight wall thickness of course insures maximum fluid capacity within the catheter for any permissible outside diameter, or from a different point of view, permits substantial reduction in the outside diameter of the catheter with lessened pain and discomfort to the patient, but

without reduction of fluid capacity. Considerable variation in the character and dimensions of the reenforcing elements and in the overall wall thickness of course are contemplated in catheters for various uses. Whereas ordinary soft-rubber catheters having walls as thin as those of the present catheter would have practically no transverse rigidity, the catheter of the present invention positively resists collapse while in use, even when doubled upon itself, but is nevertheless freely flexible for ready insertion through tortuous body passages, such insertion being greatly facilitated by the substantial longitudinal stiffness of the catheter, and

especially, by the reenforced tip.

The integral tube-gripping connector portion l3 permits convenient coupling of the catheter to do so.

The rubber embodied in thecatheters of the present invention may be caoutchouc, gutta percha, balata, or similar natural or synthetic more less rubbery materials including suchsynthetic materials as plasticized polymerized Vinyl chloride, polymerized chloroprene known as neoprene, and the like,,but preferably is unmasticated latex rubber deposited directly from natural rubber latex which of course may be suitably pre-conditioned for use according to known processes. Such unmasticated latex rubber is ,especially resistant to the repeated sterilizations to which a surgical appliance must be subjected, is sufliciently tough and strong to withstand rough usage, and, more particularly, is well adapted to form a cohesive coating com pletely embedding and firmly holding the metallic wire reenforcing elements utilized in the present invention.

Numerous modifications and variations may be made in the invention as herein described with- I claim:

1. A catheter or similar appliance comprising a relatively long and slender tubular portion having a relatively thin rubber wall, a closed tip thereon having a relatively thicker rubber wall provided with a transverse aperture, a helical wire reenforcing element embedded within the relatively thin wall of the tubular portion and extending through a substantial length of said tubular portion and providing transverse rigidity therefor, the successive convolutions of the helical reenioncing element being definitely spaced apart, and a U shaped wire reenforcing element embedded within the relatively heavier wall of the tip providing longitudinal rigidity therefor, all of said rubber being unmasticated latex rubber having the properties of rubber deposited directly irom rubber latex.

2. A catheter or similar appliance as defined in claim 1 in which the legs of the U shaped reenforcing element extend to and are positively engaged with the helical wire reenforcing element.

FLOYD C. HENDRICKSON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3938529 *Jul 22, 1974Feb 17, 1976Gibbons Robert PIndwelling ureteral catheter
US4004588 *Aug 25, 1975Jan 25, 1977Wrightson Nma LimitedApparatus for flushing ova from cows or mares
US4154242 *Jun 17, 1977May 15, 1979Zafmedico Corp.Bladder catheter
US4508535 *Apr 8, 1983Apr 2, 1985Nippon Zeon Co., Ltd.Cannula
US4639252 *Apr 5, 1985Jan 27, 1987Research Medical, Inc.Venous return catheter
US4650467 *Aug 22, 1985Mar 17, 1987Sarcem S.A.Remote control catheter
US4669456 *May 4, 1983Jun 2, 1987Mentor CorporationPositionable penile prosthesis
US4718425 *May 27, 1986Jan 12, 1988Mitsui Toatsu Chemicals IncorporatedDacron insertion tube, polyvinyl chloride guide tube
US4737153 *Feb 4, 1987Apr 12, 1988Kuraray Co., Ltd.Reinforced therapeutic tube
US5190520 *Oct 10, 1990Mar 2, 1993Strato Medical CorporationReinforced multiple lumen catheter
US5250059 *Jan 22, 1992Oct 5, 1993Devices For Vascular Intervention, Inc.Atherectomy catheter having flexible nose cone
US5405338 *Aug 19, 1993Apr 11, 1995Cordis CorporationHelically wound catheters
US5658264 *Nov 10, 1994Aug 19, 1997Target Therapeutics, Inc.High performance spiral-wound catheter
US5700252 *Nov 1, 1995Dec 23, 1997Klingenstein; Ralph JamesLumen-seeking nasogastric tube and method
US5702373 *Aug 31, 1995Dec 30, 1997Target Therapeutics, Inc.Composite super-elastic alloy braid reinforced catheter
US5795341 *Jun 7, 1995Aug 18, 1998Target Therapeutics, Inc.High performance spiral-wound catheter
US5853400 *Jun 3, 1997Dec 29, 1998Target Therapeutics, Inc.High performance spiral-wound catheter
US5891112 *Jun 7, 1995Apr 6, 1999Target Therapeutics, Inc.High performance superelastic alloy braid reinforced catheter
US5891114 *Sep 30, 1997Apr 6, 1999Target Therapeutics, Inc.Soft-tip high performance braided catheter
US5951539 *Dec 19, 1997Sep 14, 1999Target Therpeutics, Inc.Optimized high performance multiple coil spiral-wound vascular catheter
US5971975 *Oct 9, 1996Oct 26, 1999Target Therapeutics, Inc.Guide catheter with enhanced guidewire tracking
US6143013 *Apr 30, 1996Nov 7, 2000Target Therapeutics, Inc.High performance braided catheter
US6152912 *Jun 10, 1997Nov 28, 2000Target Therapeutics, Inc.Optimized high performance spiral-wound vascular catheter
US6159187 *Dec 6, 1996Dec 12, 2000Target Therapeutics, Inc.Reinforced catheter with a formable distal tip
US6165163 *Mar 26, 1999Dec 26, 2000Target Therapeutics, Inc.Soft-tip performance braided catheter
US6217566Oct 2, 1997Apr 17, 2001Target Therapeutics, Inc.Peripheral vascular delivery catheter
US6585719Jan 4, 2001Jul 1, 2003Scimed Life Systems, Inc.Low profile metal/polymer tubes
US6616651Nov 17, 2000Sep 9, 2003Robert C. StevensIntravascular microcatheter with embedded helical coil reinforcement member and methods and apparatus for making same
US6648854May 14, 1999Nov 18, 2003Scimed Life Systems, Inc.Single lumen balloon-tipped micro catheter with reinforced shaft
US6689120Aug 4, 2000Feb 10, 2004Boston Scientific Scimed, Inc.Reduced profile delivery system
US6719748May 30, 2003Apr 13, 2004Scimed Life Systems, Inc.Low profile metal/polymer tubes
US6824553Aug 25, 2000Nov 30, 2004Target Therapeutics, Inc.High performance braided catheter
US7815599Dec 10, 2004Oct 19, 2010Boston Scientific Scimed, Inc.Catheter having an ultra soft tip and methods for making the same
US7972465Feb 2, 2010Jul 5, 2011C. R. Bard, Inc.Reinforced multi-lumen catheter
US8430988Apr 15, 2011Apr 30, 2013C. R. Bard, Inc.Reinforced multi-lumen catheter
EP0206547A1 *May 28, 1986Dec 30, 1986MITSUI TOATSU CHEMICALS, Inc.Catheter with pressure sensor
EP0715863A2Nov 10, 1995Jun 12, 1996Target Therapeutics, Inc.Catheter
WO1993014707A1 *Jan 15, 1993Aug 5, 1993Devices Vascular InterventionAtherectomy catheter having flexible nose cone
Classifications
U.S. Classification604/526, 138/133, 138/118, 138/138
International ClassificationA61M25/00
Cooperative ClassificationA61M25/005, A61M25/008, A61M25/0068
European ClassificationA61M25/00T10, A61M25/00T30, A61M25/00S2