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Publication numberUS3618613 A
Publication typeGrant
Publication date9 Nov 1971
Filing date19 May 1969
Priority date19 May 1969
Publication numberUS 3618613 A, US 3618613A, US-A-3618613, US3618613 A, US3618613A
InventorsRudolf R Schulte
Original AssigneeHeyer Schulte Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Antithrombotic intravascular catheter reinforced with nonkinking means
US 3618613 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent 72] Inventor [211 App]. No.

[22] Filed 45 Patented [73 Assignee [54] ANTITHROMBOTIC CATHETER REINFO MEANS Rudolf R. Schulte Santa Barbara, Calif. 825,656

May 19, 1969 Nov. 9, 1971 Heyer-Schulte Corporation Santa Barbara, Calif.

1 Claim, 4 Drawing Figs.

[52] U.S.C1 [51] lnt.Cl

[50] Field of Search References Cited UNITED STATES PATENTS 2,330,399 9/1943 Winder INTRAVASCULAR RCED WITH NONKINKING 3,416,531 12/1968 Edwards 128/348 3,434,869 3/1969 Davidson 128/349 3,453,194 7/1969 Bennett et a1 3/1 3,485,234 12/1969 Stevens 128/348 X FOREIGN PATENTS 1,048,288 8/1953 France 128/351 4,816 1889 Great Britain 128/349 Primary Examiner-Dalton L. Truluck Attorney-Angus & Mon

ABSTRACT: This invention relates to tubular catheters which are inserted through veins to enter the peritoneal cavity for medical purposes. Such tubing catheters have other medical applications such as for drainage or for introduction of medical materials, but since the tubing is of such a small diameter.



An object of this invention is to provide a catheter for body implant, of small diameter, which will stand the stress of insertion through the veins or organs of a body.

Another object of the invention is to provide the tube-type catheter which can resist the stresses of insertion with kinking.

A further object of the invention is to provide tubing catheter which will not fail at the point where the tubing is applied to connecting devices.

Still another object of the invention is to provide tubing which will be self-guided into a vein and prevent kinking failure at its point of entrance. 1

Still another object of the invention is to provide a catheter which will curve over the muscles encountered during its course through the body without kinking.

A further object of the invention is to provide reinforced tubing that will be capable of penetrating muscles before entering body cavities without kinking or other mechanical failure. 7

Other objects and advantages of the instant invention will be shown by studying the figures and the description of invention, which follows:

FIG. 1 is a segment of an embodiment of the invention partially in cross section;

FIG. 2 is a side elevation of the embodiment of FIG. 1 before final coating; I

FIG. 3 is a section on line 33 of FIG. 2; and

FIG. 4 shows the embodiment of the invention of FIG. I and FIG. 2 in process of final coating.

In FIG. 1 there is shown a preferred embodiment of the invention.

The tubing is encircled by a continuous wire coil spring 11 which encircles the tubing in very close contact, preferably an interference fit, between the inside diameter of the the coil spring 11 and the outside diameter of the tubing 10. The tubing 10 for this class of article is of very small internal and external diameter, in the range of one-sixteenth inch. In order to provide the interference fit, the tubing is made with an entrance probe, as seen in FIG. 2. The entrance probe 12 may be conveniently formed on the tubing by thermoplastic means or may be a separate piece assembled to the tubing 10.

In order to make a coil spring of diameter that will be in interference fit with the tubing 10, the spring may be conveniently wound on a mandrel of larger diameter to form the coil and then elongated to provide the spacing of the coils and further to reduce the internal diameter of the coil spring 11.

A convenient length of tubing 10 with entrance probe 12 at one end is gripped by the entrance probe 12 and pulled through the coil 1 l with sufiicient force to overcome the interference fit between coil 11 and the outside diameter of tubing 10.

The tubing 10 is then suspended in air hanging from a fixture which engages entrance probe 12. A container 13 having a spout 14, the spout having an entrance hole 15, is passed over the tubing to the uppermost end so that entrance hole I5 is in a downward direction and the entrance hole 15 is so designed that it is a close fit to the outside diameter of the coil spring 11. The container 13 is then filled with a silicone material 16 which may conveniently be a silicone rubber of air-curing formulation. Silicone rubber is formulated to a viscosity which will cause it to cling to the exterior of the tubing 10 and fill the recesses between the coils of the spring 11 and fonn a coating 17 over said spring 11 and tubing 10 of the desired thickness. As the container 13 is allowed to move slowly downward over the tubing 10 and coil spring 11 assembly, the coated assembly of tubing 10 and coil spring I1 is then allowed to hang in air until the silicone material hardens to its final consistency,

One novel production method in assuring that the small diameter tubing may be pulled through in interference fit through the smaller internal diameter coil spring II is accomplished by fusing a cord or wire to the end of the tubing 10, so that the outside diameter does not have to be increased by adding a gripping means for pulling through the coil spring 11.

The distal end of the tubing, which is formed by the entrance probe 12 is coated with an antithrombotic coating, which may be of the nature of Hepacone, to prevent the formation of blood clots as the tubing is pulled through the body.

Thus it can be seen that a reinforced, small diameter tubing, which will not be subject to kinking and will not be reactive to the body fluids and is further provided with an entrance probe to permit passage through the body and a coating to prevent formation of thrombosis is provided by the instant invention, in accordance with the following claims.

I claim:

1. A surgical catheter comprising a flexible tubing made entirely of silicone rubber; an entrance probe integral with the flexible tubing and also made of silicone rubber, said entrance probe having a stepped-down outer diameter less than the outer diameter of the tubing and extending as a cylinder for a substantial distance; an antithrombotic coating of silicone rubber infused with heparin on said entrance probe; a flexible coil spring encircling and in interference fit with said tubing; and a surface coating of silicone rubber, once liquid and later cured to a solid, said coating fully covering the exposed surface of the spring and tubing and substantially filling in the interstices between convolutions of the spring.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Dated November 9, 1971 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the Patent Col. 1, lines 9-12 line 13 line 14 lines 17-18 lines 27-28 line 30 lines 31-32 line 33 line 35 line 36 line 38 lines 42-43 line 43 "stand the stress. .with kinking" should be --withstand insertion and usage stresses without kinking-- "tubing" should be -a tubular-- "will not fail" should be --resist failure-- "self guided into a vein and prevent kinking failure" should be --self guiding as it enters into a vein and will resist kinking-- "shown by...which follows:" should be --evident from the following detailed description in the accompany drawings in which:--

II II a should be -the presently-- "The" should be --A-- Cancel "internal and external" after "inch' and before the period, insert -inner diameter-- J Page -2- UNITED STATES PATENT OFFICE Patent No.

November 9, 1971 Dated Inventor(s) RUDOLF R. SCHULTE It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the Patent (continued) 7 Col. 1, line Col.






lines 18-20 line line

ll l3 "made" should be --provide- "seen" should be -shown-- "conveniently" should be --integrally-- Cancel "by thermoplastic means" "be"should be --constitute-- Cancel "conveniently" after "pulled" insert --by it-- "is" should be --makes-- "to" should be --with-- "which may conveniently be" should be --such as-- "Silicone" should be --The silicone-- "As the container. tubing 10 and coil spring ll" should be --The container is moved slowly dovmward over the assembled tubing and coil spring, which causes this assembly to be coatec with a layer of silicone. After this coating occurs, the coated article-- "assuring that" should be --enabling-- "may" should be --to-- J Page -3 3,618,613 November 9, 1971 Patent No. Dated RUDOLF R. SCHULTE Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

in the Patent (continued) 1 Col. 2, lines 24-25 in interference fit through" to --and fit tightly in-- lines 25-26 "accomplished fusing. .tubing 10," to --by attaching a cord or wire to the probe,

line 27 after "diameter" insert --of the tubing-- line 28 after 'll." insert --The cord or wire is passed freely through the spring, and is then used to pull the fusing through the spring.--

line 31 "which may be of the nature of Hepacone' should be --such as a coating including heparin-- line 37 change the comma to a period and cancel "in accordance with the following claims."

line 38 Add the following paragraph: --This invention is not to be limited by the embodiment shown in the drawings and described in the description, which is given by way of example and not of limitation, but only in accordance with the scope of the appended claims.--

Signed and sealed this 9th day of January 1973.

(SEAL) rttest: .1

EDWARD M. FLETCHER ,JR ROBERT GOTTSCHALK lttesting Officer Commissioner of Patents

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2330399 *11 Sep 193728 Sep 1943American Anode IncDistensible bag catheter
US3416531 *2 Jan 196417 Dec 1968Edwards Miles LowellCatheter
US3434869 *2 Nov 196425 Mar 1969Dow CorningFoley catheter with silicone rubber coating
US3453194 *3 Aug 19661 Jul 1969Dow CorningAnticoagulant surfaces produced by radiation grafting heparin to a silicone substrate
US3485234 *13 Apr 196623 Dec 1969Cordis CorpTubular products and method of making same
FR1048288A * Title not available
GB188904816A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3757768 *7 Apr 197211 Sep 1973Medical Evaluation Devices AndManipulable spring guide-catheter and tube for intravenous feeding
US3937224 *11 Apr 197410 Feb 1976Uecker Ronald LColostomy catheter
US4044765 *17 Dec 197530 Aug 1977Medical Evaluation Devices And Instruments CorporationFlexible tube for intra-venous feeding
US4106506 *26 Jan 197615 Aug 1978Koehn Wilbur RCatheter
US4360031 *11 Sep 198023 Nov 1982Medtronic, Inc.Drug dispensing irrigatable electrode
US4547192 *11 Apr 198315 Oct 1985Superior Plastic Products Corp.Gastroenteric feeding tube
US4634432 *13 May 19856 Jan 1987Nuri KocakIntroducer sheath assembly
US4669456 *4 May 19832 Jun 1987Mentor CorporationPositionable penile prosthesis
US4832681 *2 Dec 198723 May 1989Lenck Lucien CMethod and apparatus for artificial fertilization
US4931039 *21 Oct 19885 Jun 1990Baxter International Inc.Ventricular catheter introducer
US4986279 *1 Mar 198922 Jan 1991National-Standard CompanyLocalization needle assembly with reinforced needle assembly
US4990143 *9 Apr 19905 Feb 1991Sheridan Catheter CorporationReinforced medico-surgical tubes
US5045071 *19 Jan 19893 Sep 1991Mbo Laboratories, Inc.Double wall catheter with internal printing and embedded marker
US5059375 *13 Nov 198922 Oct 1991Minnesota Mining & Manufacturing CompanyApparatus and method for producing kink resistant tubing
US5125909 *11 Apr 199030 Jun 1992Richard Wolf GmbhFlexible tubular channel with external supporting ridges
US5147315 *6 Apr 199015 Sep 1992C. R. Bard, Inc.Access catheter and system for use in the female reproductive system
US5154705 *24 Jul 198913 Oct 1992Lake Region Manufacturing Co., Inc.Hollow lumen cable apparatus
US5238004 *30 Sep 199224 Aug 1993Boston Scientific CorporationHigh elongation linear elastic guidewire
US5244619 *3 May 199114 Sep 1993Burnham Warren RMethod of making catheter with irregular inner and/or outer surfaces to reduce travelling friction
US5246430 *27 Mar 199221 Sep 1993Taut, Inc.Reinforced cholangiogram catheter
US5279596 *25 Jun 199218 Jan 1994Cordis CorporationIntravascular catheter with kink resistant tip
US5335410 *15 Mar 19939 Aug 1994Burnham Warren RMethod of making ultra small diameter catheters and of reinforced tubular product
US5405338 *19 Aug 199311 Apr 1995Cordis CorporationHelically wound catheters
US5409469 *4 Nov 199325 Apr 1995Medtronic, Inc.Introducer system having kink resistant splittable sheath
US5431637 *31 Jul 199211 Jul 1995Sherwood Medical CompanyEndotracheal suction catheter
US5466230 *9 Jun 199414 Nov 1995Cordis CorporationCatheter sheath introducer with strain relief
US5472435 *21 May 19935 Dec 1995Navarre Biomedical, Ltd.Drainage catheter
US5496292 *4 May 19925 Mar 1996Burnham; WarrenCatheter with irregular inner and/or outer surfaces to reduce travelling friction
US5571073 *26 Oct 19955 Nov 1996Cordis CorporationCatheter flexible tip assembly
US5669383 *28 Jul 199423 Sep 1997Sims Deltec, Inc.Polyimide sheath for a catheter detector and method
US5776115 *17 Jan 19967 Jul 1998Becton Dickinson And CompanyCatheter having a gear-shaped lumen to avert the elimination of fluid flow therein
US5941858 *17 Sep 199724 Aug 1999Sims Deltec, Inc.Medical device for insertion into the body
US6068622 *10 Feb 199830 May 2000Medtronic Inc.Single piece hub/strain relief that can be injection molded over a shaft
US621039520 Oct 19973 Apr 2001Lake Region Mfg., Inc.Hollow lumen cable apparatus
US625819519 Mar 199910 Jul 2001Scimed Life Systems, Inc.Multi-cord fusing manufacturing process for catheter members
US634259131 Jul 200029 Jan 2002Biosurface Engineering Technologies, Inc.Amphipathic coating for modulating cellular adhesion composition and methods
US659669922 Jan 200222 Jul 2003Biosurface Engineering Technologies, Inc.Nucleic acid coating compositions and methods
US663058014 Jan 20027 Oct 2003Innerdyne, Inc.Silyl and Heparin compositions
US66856969 Feb 20013 Feb 2004Lake Region Manufacturing, Inc.Hollow lumen cable apparatus
US719806622 Oct 20023 Apr 2007Novarix Ltd., Oxford Centre For InnovationDevice for supporting and stabilising a tubing for fluid transport and such a tubing
US8523899 *22 Aug 20123 Sep 2013Olympus Medical Systems Corp.Treatment device for endoscope
US852971918 May 200710 Sep 2013Applied Medical Resources CorporationMethod of making medical tubing having variable characteristics using thermal winding
US869103513 Aug 20138 Apr 2014Applied Medical Resources CorporationMethod of making medical tubing having variable characteristics using thermal winding
US87154418 Sep 20106 May 2014Applied Medical Resources CorporationMedical tubing having variable characteristics and method of making same
US872182619 Nov 201013 May 2014Applied Medical Resources CorporationSteerable kink-resistant sheath
US910801722 Mar 201218 Aug 2015Applied Medical Resources CorporationMethod of making tubing have drainage holes
US9656042 *27 Dec 201223 May 2017Terumo Kabushiki KaishaCatheter and method
US967537827 Jan 201413 Jun 2017Applied Medical Resources CorporationSteerable kink-resistant sheath
US97892833 Feb 201417 Oct 2017Medinol Ltd.Catheter tip assembled with a spring
US20030153937 *6 Feb 200314 Aug 2003Al-Qahtani Ali Saeed MohammedApparatus for use in the treatment of choanal atresia
US20050011568 *22 Oct 200220 Jan 2005Lise KagenowDevice for supporting and stabilising a tubing for fluid transport and such a tubing
US20050165366 *28 Jan 200428 Jul 2005Brustad John R.Medical tubing having variable characteristics and method of making same
US20050273076 *7 Jun 20058 Dec 2005C.R. Bard, Inc.Subcutaneous infusion devices
US20070215268 *18 May 200720 Sep 2007Applied Medical Resources CorporationMethod of making medical tubing having variable characteristics using thermal winding
US20090149834 *7 Dec 200711 Jun 2009Gerald MossReinforced enteral feeding catheter
US20110196315 *8 Feb 201111 Aug 2011Medinol Ltd.Catheter tip assembled with a spring
US20120316543 *22 Aug 201213 Dec 2012Olympus Medical Systems Corp.Treatment device for endoscope
US20130116651 *27 Dec 20129 May 2013Terumo Kabushiki KaishaCatheter and method
EP0680771A1 *28 Apr 19958 Nov 1995Medtronic, Inc.Insulated extendable/retractable screw-in pacing lead
EP2067465A22 Dec 200810 Jun 2009Gerald MossReinforced enteral feeding catheter
EP2851061A118 Sep 201425 Mar 2015Gerald MossCatheter and method of making the same
EP2926856A127 Mar 20157 Oct 2015Gerald MossMulti-lumen catheter
WO1992019308A1 *4 May 199212 Nov 1992Burnham Warren RCatheter with irregular inner and/or outer surfaces
WO1994021420A1 *15 Mar 199429 Sep 1994Burnham Warren RMethod and apparatus for small catheters and reinforced tubular product
WO1994027697A1 *20 May 19948 Dec 1994Navarre Biomedical, Ltd.Drainage catheter
WO2003035160A1 *22 Oct 20021 May 2003Novarix LtdA device for supporting and stabilising a tubing for fluid transport and such a tubing
U.S. Classification604/523
International ClassificationB29C41/36, B05D1/18, A61M25/00
Cooperative ClassificationA61M25/005, B29L2031/7542, B29C41/36, B29L2023/00, A61M25/0045, B05D1/18, A61M25/0012
European ClassificationB29C41/36, B05D1/18, A61M25/00S2
Legal Events
30 Jan 1990ASAssignment
Effective date: 19880518
2 Mar 1987ASAssignment
Effective date: 19870126
16 Apr 1984ASAssignment
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22 Feb 1983ASAssignment
Effective date: 19830121