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Publication numberUS2221138 A
Publication typeGrant
Publication dateNov 12, 1940
Filing dateJun 15, 1938
Priority dateJun 15, 1938
Publication numberUS 2221138 A, US 2221138A, US-A-2221138, US2221138 A, US2221138A
InventorsHendrickson Floyd C
Original AssigneeHendrickson Floyd C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Filiform guide
US 2221138 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

NOV- 12, 1940 F. cQHENDRlcKscN 2,221,138

' FILIFORM GUIDE V Filed June 15, 1938 Patented Nov. 12, 1940 UNITED STABS PATENT oFFlcE 2 Claims;

The invention relates to the class of surgical instruments known as liform guides or bougies, used for the purpose of exploring and for treating strictures of all kinds.

The object of the invention is to provide an unbreakable, smooth, non-injurious instrument, slightly less flexible than the standard type so as to be more easily inserted into strictures.

Another object is to provide a iiliform guide having a tapered, metal core made up of sections of ne wires, the Wires in succeeding sections being reduced in number so as to give the desired taper to the nished article.

A further object is to provide such a core in which the central wire of the core is doubled and extends the full length of the guide to form a loop at the smaller end thereof, to retain the outer rubber coating in place and provide a very small rounded point which will not injure tissues.

A still further object is to provide a guide of the character described in which the wire core is first wrapped with silk or very thin rubber ribbon or the like, and then dipped into latex rubber so as to provide a complete coating of latex rubber.

Another object is to form the core of a mixture of spring or tempered wires and soft annealed wires, the spring wires tending to return the guide to straight form after being bent and also aiding in giving the feel to the user in probing with the guide, and the soft annealed wires permitting the guide to stay in any desired bent shape temporarily.

A still further object is to provide a threaded ferrule upon the larger end of the guide for connection to the end of a sound, although, if desired, the guide may be formed integrally upon the end of a sound so as to provide a sound or dilater having a liform guide as an integral part thereof.

'Ihe above objects together with others which Will be apparent from the drawing and following description or which may be later referred to may be attained by constructing the improved liform guide in the manner illustrated in the accompanying drawing in which- Figure l is an elevation of the improved guide;

Fig. 2, an elevation of the wire core;

Fig. 3, an enlarged longitudinal sectional view through the guide; and

Fig. 4, a further enlarged transverse sectional view thereof.

Similar numerals refer to similar parts throughout the drawing.

The improved filiform guide to which the invention pertains is built upon a tapered wire core formed of a plurality of fine wires indicated generally at I0, some of the wires being spring wire and others being soft annealed wire so as to tend to return the guide to straight form after (Cl. 12S- 358) being bent while at the same time permitting the guide to stayin any shape into which it may be bent temporarily, and also aiding in giving the feel to the user in probing with the device.

For the purpose of giving the desired taper to the core, the wires may be reduced in number in successive sections of the core from the larger end toward the smaller end thereof, as clearly shown in Figs. 2 and 3 of the drawing.

The central wire of the core indicated at I I is doubled and extends the entire length of the guide having a loop I2 formed at the smaller end of the guide.

The wire core thus formed is then wrapped throughout its entire length with silk, thin rubber ribbon or the like as indicated at I3 afterv which the wrapped core is dipped into latex rubber to form a latexrubber coating over the entire device as indicated at I4, the latex coating upon the wire loop I2 at the small end of the guide to form a very small rounded tip or point I5 which will .not injure tissues when probing with the guide.

The Wires at the large end of the guide may be soldered or otherwise connected as indicated at IS within a ferrule I'I which may be internally screw-threaded as at I8 so as to be attached to the end of a sound or the like.

However, if desired, the liform guide as above described may be integrally attached to the end of a sound so as to provide a dilater or sound having a liform guide as an integral part thereof.

With this construction a guide is provided having the proper taper and beingsufciently small to enter any restricted area while the central wire extending to the tip of the guide and forming a loop provides a reinforcement which prevents the tip from being accidentally broken off.

I claim: y 1

l. A iliform guide comprising a tapered core formed of a central wire extending the entire length of the guide and successively shorter groups of wires surrounding the central Wire and successively decreasing in length by substantially the length of the shortest group of wires, a thin flexible strand spirally wound upon the wires and a flexible body covering the core.

2. A liform guide comprising atapered vcore formed of a central wire doubled upon itself and extending the entire length of the guide and forming a loop at the smaller end of the guide, and successively shorter groups of wires surrounding the central wire, said groups of wires successively decreasing in length by substantially the length of the shortest group of wires, and a flexible body covering the wire core and forming a rounded point over said loop.

FLOYD C. HENDRICKSON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2661003 *Nov 20, 1952Dec 1, 1953Carroll Bruce JVaricose vein stripper with flexible guide leader
US2856934 *Sep 24, 1957Oct 21, 1958Diomede PetilloCatheters
US3196876 *May 10, 1961Jul 27, 1965Miller Maurice MDilator
US3352307 *Jun 8, 1964Nov 14, 1967Henry Bloxham Arnall Irving WiMedical applicators
US3664347 *Jul 25, 1969May 23, 1972Dietrich HarmjanzElectric heart stimulation method and electrode
US3704712 *Apr 10, 1970Dec 5, 1972Medidyne CorpDilator device
US3957055 *Sep 23, 1974May 18, 1976Linder Gerald SCatheter guide
US3995623 *Feb 11, 1976Dec 7, 1976American Hospital Supply CorporationMultipurpose flow-directed catheter
US4169479 *Jun 8, 1978Oct 2, 1979Rudolph MutoElongated, tapered flexible front guide for electrical catheters and method of use
US4307723 *Feb 8, 1980Dec 29, 1981Medical Engineering CorporationExternally grooved ureteral stent
US4380239 *Oct 7, 1981Apr 19, 1983The Hospital For Sick ChildrenIntubation of lacrimal ducts
US4498482 *Jul 28, 1983Feb 12, 1985Medtronic, Inc.Transvenous pacing lead having improved stylet
US4504268 *Nov 2, 1982Mar 12, 1985Intermedicate GmbhStiffening core for a catheter tube
US4682607 *Dec 2, 1985Jul 28, 1987Vlv AssociatesWire guide
US4790825 *Sep 5, 1986Dec 13, 1988Electro Catheter CorporationClosed chest cannulation method and device for atrial-major artery bypass
US4834709 *Jan 19, 1988May 30, 1989Sherwood Medical CompanyPreformable catheter
US4857049 *Aug 5, 1986Aug 15, 1989Kortum, Inc.Method and apparatus for inducing immunological and resistant response in mammary glands
US5061245 *Jan 19, 1990Oct 29, 1991Waldvogel Chester WArterial bypass tool
US5375591 *Mar 20, 1991Dec 27, 1994Mouret; PhilippeInstrument for implementing medical or surgical operations by laparoscopy or coeliscoopy
US5409015 *May 11, 1993Apr 25, 1995Target Therapeutics, Inc.Deformable tip super elastic guidewire
US5460169 *Jun 28, 1994Oct 24, 1995Mouret; PhilippeInstrument for implementing medical or surgical operations by laparoscopy or coelioscopy
US5636642 *Apr 25, 1995Jun 10, 1997Target Therapeutics, Inc.Deformable tip super elastic guidewire
US5749837 *Aug 1, 1996May 12, 1998Target Therapeutics, Inc.Enhanced lubricity guidewire
US5769796 *Jan 22, 1997Jun 23, 1998Target Therapeutics, Inc.Super-elastic composite guidewire
US5772609 *Jun 28, 1996Jun 30, 1998Target Therapeutics, Inc.Guidewire with variable flexibility due to polymeric coatings
US6139510 *May 11, 1994Oct 31, 2000Target Therapeutics Inc.Super elastic alloy guidewire
US7309318Sep 18, 2002Dec 18, 2007Boston Scientific Scimed, Inc.Flexible composite guidewire for intravascular catheter
US7883474Apr 30, 1996Feb 8, 2011Target Therapeutics, Inc.Composite braided guidewire
DE2542241A1 *Sep 23, 1975Apr 8, 1976Gerald S LinderKatheterfuehrung
DE3336045A1 *Oct 4, 1983May 2, 1985Maerz PeterGuide mandrin for catheters and similar instruments, and a method for the production thereof
DE3336046A1 *Oct 4, 1983May 2, 1985Maerz PeterGuide mandrin for catheters and such like instruments, and a method for the production thereof
DE3802976C1 *Feb 2, 1988Aug 10, 1989Sterimed Gesellschaft Fuer Medizinischen Bedarf Mbh, 6600 Saarbruecken, DeGuide wire for catheters
WO1981002098A1 *Jan 22, 1981Aug 6, 1981T FogartyFlexible calibrator
Classifications
U.S. Classification606/191
International ClassificationA61M29/00, A61M23/00
Cooperative ClassificationA61M29/00
European ClassificationA61M29/00