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Publication numberUS3631848 A
Publication typeGrant
Publication dateJan 4, 1972
Filing dateSep 4, 1968
Priority dateSep 4, 1968
Publication numberUS 3631848 A, US 3631848A, US-A-3631848, US3631848 A, US3631848A
InventorsWolf F Muller
Original AssigneeUs Catheter & Instr Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Extensible catheter
US 3631848 A
Abstract
A flexible cardiac or vascular catheter provided at its distal end with a smaller extensible and retractable flexible tubular extension particularly adapted to reach normally inaccessible treatment locations in vessels or branches thereof, the extension being movable axially of the catheter by means of a control wire the proximal end of which projects from the proximal end of the catheter.
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Description  (OCR text may contain errors)

United States Patent [72] lnventor Wolf F. Muller 2,826,197 3/1958 Leonard 128/227 Southampton, N.Y. 2,862,498 12/ 1958 Weekes.. 128/351 [21] Appl. No. 757,365 3,081,770 3/1963 Hunter 128/350 X [22] Filed Sept. 4,1968 3,220,411 11/1965 Czomy 128/214.4 [45] Patented Jan. 4, 1972 3,344,791 10/1967 Foderick 128/349 [73] Assignee United States Catheter & Instrument 3,470,876 10/ 1969 Barchilon 128/348 Corporation FOREIGN PATENTS Falls 340,128 9/1921 Germany 128/349 Primary Examiner-Dalton L. Truluck EXTENSIBLE CATHETER AttorneyW. Saxton Seward 6 Claims, 6 Drawing Figs.

[52] US. Cl l28/2.05 R, 128/348 [51] Int. Cl ABSTRACT: A flexible cardiac or vascular catheter provided [50] Field of Search 1223/2 2 05 at its distal end with a smaller extensible and retractable flexi- 21 2; ble tubular extension particularly adapted to reach normally 356 inaccessible treatment locations in vessels or branches thereof, the extension being movable axially of the catheter by [56] References Cited means of a control wire the proximal end of which projects UNITED STATES PATENTS from the proximal end of the catheter. 837,459 12/1906 Farrington et al. 128/241 EXTENSIBLE CATHETER This invention generally relates to new and usefulimprovements in catheters and particularly seeks to provide a novel cardiac or vascular catheter having an axially adjustable flexible tubular tip extension.

The marked advances in cardiac and vascular surgery in the past few years and other medical problems that require diagnostic study of the vascular beds and systems has led to the extensive use of cardiac or vascular catheters, particularly for retrograde aortography and anginocardiography, and to take blood samples, determine oxygen content, infuse or inject medicaments at internal sites and various other uses that require the insertion of a relatively long catheter to an internal site that requires movement of the catheter into branch vessels at sharp angles relative to the feeding direction of the catheter or requires the distal end of the catheter to follow a sinuous path as it approaches the internal site.

The most common method for insertion of such catheters is the percutaneous technique described in 1953 by Sven Ivar Seldinger. In this procedure a local anesthetic is administered and a skin puncture made at a small angle to the vessel (e.g. femoral in the leg or brachial in the arm) with an obturator positioned within a cannula. Once the unit has been properly located in the vessel, the obturator is removed and a flexible spring guide is then inserted through the cannula into the vessel for a short distance. Pressure is then applied to hold the spring guide in place while the cannula is withdrawn. The spring guide is then fed into the vessel, generally under a fluoroscope, to the desired point which may or may not require considerable manipulation if there are branched vessels or curves concerned. Thereafter a catheter is passed over the flexible spring guide and fed into the desired position and the spring guide is then withdrawn from the catheter.

A particularly useful spring guide for these purposes is disclosed and claimed in my copending application for patent Ser. No. 563,927, filed June 29, 1966, now Pat No. 3,452,742. In that form of spring guide predetermined portions of its length may be controllably curved by manipulation of an inner tension wire from its proximal end outside the patient and it may also be curved after a catheter is placed thereover to cause the catheter to curve.

However, there are many conditions where even the great manipulative ability gained through the use of the above type of spring guide is not adequate to enable the distal tip of a catheter to be properly positioned, as where thedesired treatment point is located a substantial distance along a small diameter branch vessel extending at a sharp angle from the vessel into which the catheter is inserted or where the desired point is located a substantial distance along a particularly sinuous portion of the vessel.

This problem is overcome through the use of a catheter constructed in accordance with this invention.

Therefore, an object of this invention is to provide a flexible catheter having anextensible distal end.

Another object of this invention is to provide a catheter of the character stated in which the distal end extension comprises a small diameter flexible tube normally housed completely within the distal end portion of the catheter lumen and is axially or angularly projectable therefrom through a suitably configured catheter tip.

Another object of this invention is to provide a catheter of the character stated in which the distal end extension is projected or retracted from the tip of the catheter by a manipulating wire extending through the full length of the catheter lumen with its proximal end projecting substantially beyond the proximal end of the catheter.

Another object of this invention is to provide a catheter of the character stated in which the manipulating wire isconnected to the extensible tube by a swivel coupling so designed that injection or infusion liquids can pass from the lumen of the catheter into and through the lumen of the tubular extensron.

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 a side elevation, partly broken, of a catheter constructed in accordance with this invention and shows the extensible tube in its retracted position;

FIG. 2 is a view similar to FIG. 1, but showing the extensible tube in itsfully projected position;

FIG. 3 is an enlarged fragmentary longitudinal section of the distal end of the catheter and shows the manipulating wire connector and one form of tip that may be used when the extension tube is to be projected axially;

FIG. 4 is a view similar to FIG. 3 but showing a form of tip that may be used when the extension tube is to be projected at an angle to the axis of the catheter.

FIG. 5 is an enlarged fragmentary longitudinal section of the distal end of a catheter modified to provide an integral tip used for the axial projection of the extension tube; and

FIG. 6 is a view similar to FIG. 5 but showing an integral tip used for the angular projection of the extension tube.

Referring to the drawings in detail, the invention as illustrated is embodied in a flexible catheter generally designated 5 having a proximal end 6 and a distal end 7, which may be formed from any suitable material such as (irradiated) polyethylene, nylon or a tetrafluoroethylene resin and which may be of uniform diameter or tapered as indicated in FIGS. 1 and 2 of the drawings. Whatever the material, it should be radiopaque in order that its progress of advance within a vessel and the positioning of its distal end may be observed through the use of a fluoroscope.

In one form of the invention (see FIG. 3) where the catheter is to be provided with an axially projectable tubular extension, the distal end 7 of the catheter is provided with a generally cylindrical rigid tip 8 tightly secured therewithin and having a full length longitudinal duct or lumen 9 of a diameter sufficient to permit the catheter to be applied over a spring guide and to permit a catheter extension tube to be passed therethrough following removal of the spring guide. A flexible catheter extension tube 10, preferably formed from a radiopaque silicone rubber or similar material and having an outside diameter such that is will freely slide within the catheter tip 9, is normally positioned within the distal end portion of the catheter with the distal end of the extension tube in registry with the distal end of the catheter. The extension tube may be of any desired length, but will generally be from 2 to 6 inches long.

The inner or proximal end of the extension tube 10 carries an intemalmetal or rigid plastic dilating ring or annulus 11, having an outside diameter substantially equal to or slightly greater than the diameter of thetip lumen 9, which forces the formation of a rounded shoulder 12 on the extension tube which becomes seated against the proximal end of the tip 8 when the tube is fully projected beyond the tip. The shoulder 12 also prevents the tube 10 from becoming expelled from the distal end of the catheter.

A cylindrical connector generally designated 13 has its distal end turned down to define an externally corrugated stud 14 that is inserted and retained within the proximal end of the extension tube 10 in abutting relation to the annulus II. A heat-shrunk bandor sleeve 144 may be used to secure the extension tube 10 on the stud 14. The stud 14 is provided with an axial recess 15 extending into communication witha radial aperture 16 to permitpassage of liquid from the lumen of the catheter into and through the lumen of'the extension tube-l0.

An extension tube manipulating wire l7 is provided at-its distal end with ahead or pellet l8 securelyfastened thereto and freely fitted with a cylindrical recess 19 formed in the proximal end of the connector 13. That endof the connector is rolled over as at 20 to retain the pellet within the recess 19 while pennitting it and the attached wire 17 to freely swivel or rotate in either direction with respect tothe connector.

The proximal end. of thewire I7, which extends a substantial distance beyond the proximal end of the catheter, carries a manipulating knob 21 which conveniently may be in the form of a small pin vise for ready attachment to and removal from the wire. Thus the wire may be moved in either direction to effeet a corresponding movement of the extension tube 10.

' in FIG. 4 of the drawings the distal end 7 of the catheter is fitted with an internal tip 22 in which one side of the central portion thereof is machined to define a curvilinear passageway 23 for forcing the distal end of the extension tube 10 to project outwardly at an angle with respect to the axis of the tip when the tube is advanced. The extreme distal end poru'on of the tip 22 is provided with an axial bore 24 of sufficient diameter to permit the catheter to be passed over a spring guide and to permit guide to be withdrawn. The passageway 23 is so contoured and proportioned that the extension tube 10 will always follow the passageway rather than the bore 24.

In FIG. of the drawings there is illustrated a modification in which the distal end of a catheter 25 is provided with an integrally formed axially aligned tip 26 of reduced diameter to define a curved inner shoulder 27 against which the shoulder 12 of the extension tube may be seated when the extension tube is fully projected.

This same principle of integral tip formation may be employed where the extension tube 10 is to be projected at an angle to the axis of the catheter and is illustrated in FIG. 6 of the drawings. In this instance the distal end of a catheter 28 is provided with an integrally formed axially aligned tip extension 29 of reduced diameter which defines at its proximal end a curved inner shoulder 30 and which terminates at its extreme distal end in a tip 31 curved to direct the extension tube 10 at the desired angle with respect to the axis of the catheter.

In use, the manipulating wire 17 and its attached extension tube 10 is completely withdrawn from the catheter 5 and the catheter is advanced over a previously inserted spring guide to a position such that the distal end of the catheter approaches, but does not reach, the desired treatment point. Then the spring guide is withdrawn and the tubular extension 10 is reinserted into the catheter and advanced by the wire 17 until its distal end is in registry with the distal end of the catheter, after which the catheter may be rotated or otherwise manipulated as the extension 10 is advanced beyond the distal end of the catheter until its distal end reaches the desired treatment point.

If the treatment is to be simply the rapid injection of a liquid, it makes little or no difference whether or not the tube 10 has been fully extended so that its shoulder 12 seats against the proximal end of the tip 8 to prevent leakage of the injection liquid from the distal end 7 of the catheter per se. However, if the treatment is to be the prolonged lowvolume infusion of a liquid, it is important that the catheter 5 and its extension tube 10 be so adjusted that when the distal end of the extension tube is at the desired treatment point it has been fully extended beyond the distal end 7 of the catheter to firmly seat the shoulder 12 against the proximal endof the tip 8 and thus force all of the infusion liquid to flow through the tube 10 and to prevent any leakage of the infusion liquid from the distal end of the catheter per se.

It is, of course, to be understood that variations in arrangements and proporu'ons of parts may be made within the scope of the appended claims.

I claim:

l. A flexible catheter having a lumen extending its full length, the diameter of the lumen being reduced adjacent its distal end to form a proximally facing annular shoulder, a flexible tubular extension having an outside diameter permitting free axial sliding movement through said reduced diameter lumen, said extension being enlarged adjacent its proximal end to form a distally facing shoulder engageable with the first named shoulder to limit movement of the extension distally with respect to said catheter, the length of said extension from its distal end to its enlarged shoulder being greater than the distance from the distal end of the catheter to the annular shoulder in said lumen filamentary means extending from said tubular extension to and beyond the proximal end of the catheter for effecting sliding movement of said tubular extension relative to said catheter, and a coupling connecting the proximal end of said extension to the distal end of said filamentary means, the lumen of the extension to the distal end of said filamentary means, the lumen of the extension being in communication with the lumen of the catheter proximally of both said shoulders.

2. The catheter of claim 1 in which said filamentary means is a wire carried within said lumen and having its distal end connected to the proximal end of said tubular extension.

3. The catheter of claim 1 in which a rigid internal tip is positioned within the distal end of said lumen and provided with a tube-directing passageway said coupling for said filamentary means having its distal end connected to the proximal end of said tubular extension and its proximal end swivel connected to said means, and in which said means is a wire carried within said lumen and having its distal end swivel connected to said connector.

4. The catheter of claim 1 in which said tubular extension is radiopaque.

5. The catheter of claim 1 in which the first and second shoulders are shaped to form, when engaged, a fiuidtight seal.

6. The catheter of claim 1 in which the catheter is provided, adjacent its distal end with a laterally directed opening from its reduced diameter portion and with associated means for guiding the tubular extension into and through said opening when the extension is moved distally with respect to the catheter.

* i t t

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US837459 *Nov 2, 1905Dec 4, 1906Charles Oliphint FarringtonVaginal irrigator.
US2826197 *Nov 17, 1953Mar 11, 1958Leonard Edith MPeristaltic therapeutic apparatus
US2862498 *Jun 14, 1957Dec 2, 1958Weekes Don JEndotracheal tube
US3081770 *Sep 21, 1960Mar 19, 1963John M HunterSurgical instrument
US3220411 *Jun 27, 1962Nov 30, 1965Czorny Vasil PIntravenous catheter placement unit
US3344791 *Feb 12, 1965Oct 3, 1967Foderick John WBulbous urinary catheter with axial extension means
US3470876 *Sep 28, 1966Oct 7, 1969John BarchilonDirigible catheter
DE340128C *Jul 15, 1920Sep 2, 1921Albrecht Meyenberg DrVorrichtung zur Entfernung eitriger Sekrete aus der Harnroehre
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3687142 *Oct 6, 1970Aug 29, 1972Leibinzohn SaulCatheter
US3754555 *Oct 5, 1971Aug 28, 1973Schmitt GControllable barbed intracardial electrode
US4029105 *Nov 26, 1975Jun 14, 1977Will Ross, Inc.Tracheostomy and endotracheal units
US4148319 *Dec 29, 1976Apr 10, 1979Kasper Richard FUrinary retention catheter
US4284081 *Mar 1, 1979Aug 18, 1981Kasper Richard FUrinary retention catheter
US4676228 *Oct 25, 1985Jun 30, 1987Krasner Jerome LMedical apparatus having inflatable cuffs and a middle expandable section
US4690131 *May 12, 1986Sep 1, 1987The United States Of America As Represented By The Department Of Health And Human ServicesMedical apparatus
US4770653 *Jun 25, 1987Sep 13, 1988Medilase, Inc.Laser angioplasty
US4787884 *Sep 1, 1987Nov 29, 1988Medical Engineering CorporationUreteral stent guidewire system
US4790809 *May 14, 1987Dec 13, 1988Medical Engineering CorporationUreteral stent
US4820262 *Dec 12, 1985Apr 11, 1989Medical Engineering CorporationUreteral stent
US4846193 *Sep 21, 1987Jul 11, 1989Advanced Cardiovascular Systems, Inc.Extendable guide wire for vascular procedures
US4874371 *Nov 5, 1987Oct 17, 1989Medilase, Inc.Control handle
US4960134 *Nov 18, 1988Oct 2, 1990Webster Wilton W JrSteerable catheter
US5057092 *Apr 4, 1990Oct 15, 1991Webster Wilton W JrBraided catheter with low modulus warp
US5059176 *Dec 21, 1989Oct 22, 1991Winters R EdwardVascular system steerable guidewire with inflatable balloon
US5207229 *Oct 1, 1990May 4, 1993Advanced Biomedical Devices, Inc.Flexibility steerable guidewire with inflatable balloon
US5271415 *Jan 28, 1992Dec 21, 1993Baxter International Inc.Guidewire extension system
US5282478 *Aug 21, 1991Feb 1, 1994Baxter International, Inc.Guidewire extension system with coil connectors
US5341817 *Dec 14, 1992Aug 30, 1994Cordis CorporationElongated guidewire for use in dilation procedures
US5377690 *Feb 9, 1993Jan 3, 1995C. R. Bard, Inc.Guidewire with round forming wire
US5562619 *Oct 19, 1993Oct 8, 1996Boston Scientific CorporationDeflectable catheter
US5624379 *Oct 13, 1995Apr 29, 1997G. I. Medical Technologies, Inc.Endoscopic probe with discrete rotatable tip
US5727553 *Apr 3, 1996Mar 17, 1998Saad; Saad A.Catheter with integral electromagnetic location identification device
US5865800 *Oct 8, 1996Feb 2, 1999Boston Scientific CorporationDeflectable catheter
US6007514 *Sep 30, 1997Dec 28, 1999Nita; HenryUltrasound system with pathfinding guidewire
US6113579 *Mar 4, 1998Sep 5, 2000Scimed Life Systems, Inc.Catheter tip designs and methods for improved stent crossing
US6517515Jan 20, 1999Feb 11, 2003Scimed Life Systems, Inc.Catheter having variable size guide wire lumen
US6911016Aug 6, 2001Jun 28, 2005Scimed Life Systems, Inc.Guidewire extension system
US7575571Oct 29, 2002Aug 18, 2009Medtronic, Inc.Indexing cell delivery catheter
US7588581Mar 26, 2002Sep 15, 2009Medtronic, Inc.Placement of chronic micro-catheter device and method
US7744574Dec 16, 2004Jun 29, 2010Boston Scientific Scimed, Inc.Catheter tip to reduce wire lock
US7955293Aug 23, 2006Jun 7, 2011Flowcardia, Inc.Ultrasound catheter for disrupting blood vessel obstructions
US7967789Jul 14, 2009Jun 28, 2011Medtronic, Inc.Indexing cell delivery catheter
US7993329Aug 13, 2003Aug 9, 2011Cook Medical Technologies LlcERCP catheter with a removable handle for lithotriptor compatible basket
US8043251Aug 7, 2009Oct 25, 2011Flowcardia, Inc.Ultrasound catheter and methods for making and using same
US8062566Jul 25, 2006Nov 22, 2011Flowcardia, Inc.Method of manufacturing an ultrasound transmission member for use in an ultrasound catheter device
US8133236Nov 7, 2006Mar 13, 2012Flowcardia, Inc.Ultrasound catheter having protective feature against breakage
US8152753Aug 7, 2009Apr 10, 2012Flowcardia, Inc.Ultrasound catheter and methods for making and using same
US8221343Jan 20, 2005Jul 17, 2012Flowcardia, Inc.Vibrational catheter devices and methods for making same
US8226566Jun 12, 2009Jul 24, 2012Flowcardia, Inc.Device and method for vascular re-entry
US8246643Jul 18, 2008Aug 21, 2012Flowcardia, Inc.Ultrasound catheter having improved distal end
US8308677Jun 3, 2011Nov 13, 2012Flowcardia, Inc.Ultrasound catheter for disrupting blood vessel obstructions
US8465456Jul 31, 2008Jun 18, 2013Boston Scientific Scimed, Inc.Extendable aspiration catheter
US8496669Dec 21, 2007Jul 30, 2013Flowcardia, Inc.Ultrasound catheter having protective feature against breakage
US8506519Jul 16, 2007Aug 13, 2013Flowcardia, Inc.Pre-shaped therapeutic catheter
US8613751Jan 28, 2008Dec 24, 2013Flowcardia, Inc.Steerable ultrasound catheter
US8617096Feb 1, 2011Dec 31, 2013Flowcardia, Inc.Ultrasound catheter devices and methods
US8641630Jul 7, 2010Feb 4, 2014Flowcardia, Inc.Connector for securing ultrasound catheter to transducer
US8647293May 22, 2008Feb 11, 2014Flowcardia, Inc.Therapeutic ultrasound system
US8668709Feb 25, 2008Mar 11, 2014Flowcardia, Inc.Steerable ultrasound catheter
US8679049Jul 17, 2012Mar 25, 2014Flowcardia, Inc.Device and method for vascular re-entry
US8690819Nov 9, 2012Apr 8, 2014Flowcardia, Inc.Ultrasound catheter for disrupting blood vessel obstructions
USRE34502 *Mar 11, 1992Jan 11, 1994Webster, Jr.; Wilton W.Steerable catheter
DE3030579A1 *Aug 13, 1980Mar 4, 1982Braun Melsungen AgVenenverweilkatheter
EP0664719A1 *Sep 9, 1993Aug 2, 1995Cardiovascular Imaging Systems, Inc.Catheter tip with a low friction lining
EP0746371A1 *Feb 13, 1995Dec 11, 1996Cardiovascular Imaging Systems, Inc.Improved tracking tip for a catheter
WO1989006985A1 *Jan 27, 1989Aug 10, 1989Advanced Biomedical Devices InSteerable guidewire for vascular system
WO1999044666A2 *Feb 18, 1999Sep 10, 1999Scimed Life Systems IncCatheter tip designs and methods for improved stent crossing
WO2011044217A1 *Oct 6, 2010Apr 14, 2011Boston Scientific Scimed, Inc.Devices for introducing multiple instruments and methods of use
Classifications
U.S. Classification600/434, 604/523, 604/95.4
International ClassificationA61M25/00
Cooperative ClassificationA61M25/0068, A61M25/0021, A61M25/0905, A61M25/0074
European ClassificationA61M25/00T10, A61M25/09D, A61M25/00R