Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.


  1. Búsqueda avanzada de patentes
Número de publicaciónUS2857915 A
Tipo de publicaciónConcesión
Fecha de publicación28 Oct 1958
Fecha de presentación2 Abr 1956
Fecha de prioridad2 Abr 1956
Número de publicaciónUS 2857915 A, US 2857915A, US-A-2857915, US2857915 A, US2857915A
InventoresSheridan David S
Cesionario originalSheridan David S
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
X-ray catheter
US 2857915 A
Resumen  disponible en
Previous page
Next page
Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

Oct. 28, 1958 D. s. SHERIDAN 2,857,915

X-RAY CATHETER Filed April 2, 1956 INVENTOR DAVID S. SHERIDAN BY fiwm ATTORNEY United States Patent X-RAY CATHETER David S. Sheridan, Argyle, N. Y.

Application April 2, 1956, Serial No. 575,393

Claims. (Cl. 128-349) This invention relates to X-ray catheters, i. e., nonabsorptive catheters whose position within living tissue into which the catheter is inserted may be determined by X-ray observation.

In many of the surgical or clinical procedures in which catheters are employed, it is desirable or even essential to be able to determine the location of the distal end or other portion of the catheter within the body of a patient into which it has been inserted. This determination can be made in several ways, but one of the most satisfactory methods employs X-ray observation. This is accomplished by using a catheter which is in whole or in part opaque to X-rays and directing a beam of X-rays through the body of the patient in the neighborhood of the inserted catheter while observing the relative positions of catheter and living tissue on a fluoroscope or X-ray film.

Several forms of catheters have been devised and manufactured heretofore to be used With such X-ray observation procedures. One type is made by making lines or markings with a fine brush, stenciling devices, printing equipment, or the like, on an X-ray transparent, preformed catheter, using an X-ray opaque paint or coating composition to form the markings. However, the most prevalent type of X-ray catheter is completely opaque to both visible light and to X-rays and such catheters can be made by incorporating an X-ray opaque substance in the material which makes up the entire wall of the tube. Likewise, X-ray catheters have been prepared by using varnish or other coating compositions which have X-ray opaque pigments dispersed therein to form one or more layers of the catheters. In this case, the resulting catheters are generally opaque, both to visible light and X-rays throughout their entire length and cross-section.

X-ray catheters have also been produced as described in U. S. Patent 2,212,334 by extruding a plastic cellulosic material through a tubular molding die and at uniform brief intervals, forceably injecting into the stream of the extruded material as it is being molded, a small quantity of similar plastic material impregnated with X-ray opaque material. This forms a catheter having a series of separated X-ray opaque marks extending longitudinally along the catheter.

Although the Xray catheters known and made heretofore have been generally useful for their intended purposes, they have also had certain inherent deficiencies which have prevented their use from being completely satisfactory. For example, this type of catheter which is made by having the X-ray opaque markings painted thereon or by including X-ray opaque material in the varnish or coating compositions used in forming outer layers of the catheters do not stand up well in use because when subjected to sterilization or cleaning, the markings or coatings are in whole or in part destroyed. Also with some known catheters of the X-ray type there has been a problem of precisely defining their position when observed by X-rays because there are portions of such catheters which are not opaque, e. g., the distal end, which may be folded back or bent in a harmful manner without showing up on the X-ray screen. Furthermoreflt is important to have a uniform X-ray shadow show up. so as not to confuse the physician with a broken line, especially with uretheral catheters where small kidney stones might be hidden behind or mistaken for a sepa rate marking.

A principal object of the present invention is to provide X-ray catheters of a new, improved type. Further objects include:

(1) The provision of new, non-absorptive catheters, Which for the most part are transparent to visible light so that it is possible to see through them to ascertain their cleanliness or the like, but which have an integral continuous opaque strip or line running along the entire length of the catheter so as to permit the position of each and every portion of the catheter to be precisely determined within living tissue into which the catheter may be inserted by X-ray observation;

(2) The provision of X-ray catheters which have substantially uniform wall thickness throughout their entire length, but at the same time are double tapered, i. e., have a distal end which tapers down to a small blunt tip and have a rear or outlet end which flairs outwardly to a diameter substantially larger than the diameter of the principal untapered section of the catheter.

Other objects and further scope of applicability of the present invention will become apparent from the detailed description given hereinafter; it should be understood, however, that the detailed description, while indicating preferred embodiments of the invention, is given by way of illustration only, since various changes and modifications Within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

A more complete understanding of the new catheters of this invention and their method of production can be had by reference to the accompanying drawing in which:

Fig. 1 is a plan view of one form of catheter made in accordance with the present invention;

Fig. 2 is an enlarged cross-sectional view of the catheter of Fig. 1, taken along the line 2-2 of Fig. l; I

Fig. 3 is an enlarged cross-sectional view of an extension die used to form the new catheters.

Referring in detail to the drawings, the catheter 2 comprises a generally circular, seamless, non-fibrous tube 4 which tapers down from a main body section 6 of substantially uniform cross-section at the probe or distal end 8 to a tip 10. The funnel or trailing end 12 of the tube 4 flairs or tapers outwardly so that the open end 14 is of substantially larger diameter than the main body portion 6.

One or more inlet openings 16 are provided in the distal end 8 through which fluids may enter the catheter to be conducted through the tube 4 and out the opening 14, or as is known, the funnel end 12 may be attached to a syringe to inject fluids into the patient.

A strip or line 18 runs longitudinally along the entire length of the tube 4 and, as can be seen in Fig. 2, this line is formed by a strip of material which is integral with and embedded in the tube 4, so that the outside 20 and inside 22 of the tube are completely smooth. i

The tube 4 is made from flexible water-proof plastic material and a variety of products are commercially available for this purpose. Examples of usable materials include certain pliable or flexible forms of nylon; polyester plastics; polyethylene; and vinyl polymers, such as vinyl chloride polymers or copolymers with other vinyl esters such as vinyl acetate; vinylidene chloride polymers or the like.

Although it is possible to include X-ray transparent pigment in the plastic material of which tube 4 is formed,

Patented Oct. 28, 8

it i preferable that the plastic material. be unpismeut d so that it is transparent to visible light, making it possible to see through the catheter, to determine if it is clean, or to determine. position of foreign, matter or the like that. might beinit. Ifdesi'red, dyes; can be in.- cluded in, the plastic material to give the catheter a dis;- tinctive color, thus marking it for special uses or other purposes.

Although it is possible: to form the. strip: 1.8 from plastic; material which is compatible with, although chemically difierent from a plastic: material used tov form the main tube 4, this stripv 18' is preferably made from the same plastic material as the tube 4. However, in. the plastic; of; which the strip. 18: is composed, there: is uniformly dispersed a finely powdered X-ray opaquev pigment. Obviously, this pigment should: bev water insoluble and non- Various; materials are available for this purpose, such as. insoluble organic iodine containing compounds, but preferably a bismuth salt is used, e. g., bismuth subnitrate or bismuth oxide.

1 The new catheters are made by: an extrusion procedure. Thus, a bi-orifice tubularextrusion die, such as shown in Fig. 3, is fitted to a double screw extrusion machine or similar device equipped with means for blowing air into the resulting extruded tube through acentral opening 26 in the center of the die 24'. The tubular die 24 has a major orifice 28 which is substantially ring-shaped in cross-section, formed between the inner wall 30 and outer wall 32, and also has a minor orifice 34 which is substantially circularly segmental in cross-section, formed by anarcuate-wa'll portion 36' anda chordal wall portion 38 contiguous with the outer wall 32 of the major orifice 28.

In extruding the tube of which the catheter is formed, the plastic material tocreate the tube 4 is extruded through themajor orifice 28-, while the X-ray opaque pigmented plastic material to form the longitudinal strip 18 is extruded through the minor orifice 34.

With the possible exception of that part of the catheter which comprises the tip 1 0 of the catheter, the catheter should have substantially'a uniform wall thickness throughoutits length. Such uniformity in wall? thickness, in spite of-the tapered ends 8 and 12, is obtained by extrudin'g plastic material through the die 24 in varying quantities per unit time, and at the same time, coordinating the rate of withdrawing the tube away from the die, and also introducing air through the die opening 26, so that the air blowing and withdrawal is coordinated with the change in rate of extrusion of plastic material to maintain a substantially constant wall thickness with varying diameter of tubing.

The-tubing as it' is withdrawn from the extrusion die, can immediately be cut into proper lengths at the points of maximum and minimum taper, or a' continuous length of tapered tubing can be produced from which catheters can subsequently be formed by a series of operations in which the continuous tubing is cut at the points of maximum diameter and then cut at the points of minimum diameter, if open. end catheters; are desired, or heated at these points of minimum diameter so as to close the end of the tube and form a: closed tip 10 if a closed end catheter is required. Thereafter, the required number of inlet openings 16 can be. punched, drilled or melted into the catheter.

The new catheters. of this invention can be used. as roughly or treated as severely as most any other catheters no av ilabl witho t de m nt t the X-r y marked characteristics thereof. Moreover, they can be made not only as double-taper catheters as specifically described and illustrated, but in any other standard shapes or forms in which catheters are produced.

I claim:

1. A non-absorptive catheter whose position within living tissue into which the catheter is inserted may be precisely determined by X-ray observation which consists of a seamless, non-fibrous tube of flexible, waterproof, plastic material having a continuous strip of said plastic material with powdered X-ra-y opaque pigment dispersed therein extending. longitudinally along the entire length thereof, said strip being integral with and embedded in the remainder of the tube, whereby said tube has substantially smooth inner and outer surfaces.

2. A non-absorptive catheter whose position within living tissue into which the catheter is inserted may be preci'sely determined by X-ray observation which consists of a. seamless extruded tube of a vinyl chloride copolymer of substantially uniform thickness throughout, having a continuous strip of'sai'd copolymer with apowdered waterinsoluble bismuth salt pigment dispersed therein extending longitudinally along the entire length thereof, said strip being integral with and embedded in the remainder of the tube whereby said tube has substantially smooth inner and outer surfaces.

3-. A catheter as claimed in claim 1 wherein. said tube, exclusive of said pigmented strip, is transparent both to X-rays and visible light.

4. A non-absorptive catheter whose position within living tissue into which the catheter is inserted may be precisely determined by X-ray' observation whichconsists of an extruded, seamless, non-fibrous tube of flexible, water-proof, plastic material having a continuous strip of X-ray opaque material extending longitudinally along the entire length thereof, said strip being integral with and embedded in the remainder of the tube, whereby said tube has substantially smooth inner and outer surfaces.

5. A non-absorptive catheter whose position Within living tissue into which the catheter is inserted may be precisely determined by X-ray observation which consists of an extruded, seamless-,non-fibrous tube of flexible, waterproof, plastic material having a' continuous strip of X-ray opaque material extending longitudinally along the entire length thereof, said strip being integral with and embedded in the remainder of the tube, whereby said tube has substantially smooth inner and outer surfaces and said tube, exclusive of said X-ray strip, being transparent both to X'-rays and visible light.

ReferencesCitedin the file of. this patent UNITED STATES PATENTS 1,428,381 Lower Sept. 5, 1922 2,212,334 Wallereich Aug. 20, I940 2,561,569 Flynn July 24, 1951 2,688,329 Wallace Sept. 7-, 1954 FOREIGN PATENTS 726,706 Great Britain Mar. 23, I955 REFERENCES Urological Instruments, Eynard, Catalog of C. R. Bard, Inc., Jan. 26', 1940;, page one, #370. (Copy in Division 55.)

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US1428381 *3 Nov 19215 Sep 1922Faultless Rubber CoTubing machine
US2212334 *15 Ago 193620 Ago 1940Mueller & Co VCatheter
US2561569 *10 Ene 194724 Jul 1951Wardlyn CorpMethod of making catheters
US2688329 *19 Mar 19537 Sep 1954American Cystoscope Makers IncCatheter
GB726706A * Título no disponible
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US3094124 *30 Jun 196018 Jun 1963Davol Rubber CoArterial catheter
US3119392 *14 Feb 196128 Ene 1964Zeiss AliceCatheter
US3136310 *18 Ene 19609 Jun 1964Bausch & LombOptical catheter
US3182662 *25 Jul 196211 May 1965Shirodkar Vithal NPlastic prosthesis useful in gynaecological surgery
US3190290 *8 Feb 196222 Jun 1965Brunswick CorpIntercostal catheters
US3217705 *2 May 196216 Nov 1965Billings Orman BDevice for testing internal bleeding
US3227154 *11 May 19624 Ene 1966Galen B CookDiagnostic bag with impressionable outer surface and method of using it
US3228894 *24 Dic 196211 Ene 1966Us Catheter & Instr CorpFluorocarbon tungsten members
US3314430 *22 Jun 196418 Abr 1967Brunswick CorpSump drain catheter
US3336918 *24 Dic 196222 Ago 1967Us Catheter & Instr CorpRadiopaque, urethane-coated catheter and method for coating same
US3608555 *31 Dic 196828 Sep 1971Chemplast IncRadio opaque and optically transparent tubing
US3612038 *3 Feb 196912 Oct 1971Becton Dickinson CoPreformable catheter package assembly and method of preforming
US3618614 *6 May 19699 Nov 1971Scient Tube Products IncNontoxic radiopaque multiwall medical-surgical tubings
US3805301 *28 Jul 197223 Abr 1974Meadox Medicals IncTubular grafts having indicia thereon
US3847157 *18 Jun 197312 Nov 1974J CaillouetteMedico-surgical tube
US3907955 *24 Jul 197323 Sep 1975Aeroquip AgProcess for manufacturing electrically conductive polytetrafluoroethylene tube
US4027659 *21 Nov 19757 Jun 1977Krandex CorporationRadiographic opaque and conductive stripped medical tubes
US4105732 *25 Feb 19778 Ago 1978Krandex Corp.Radiographic opaque and conductive striped medical tubes
US4212304 *7 Abr 197815 Jul 1980Medical Engineering Corp.Uretheral catheter stent
US4330497 *19 Ene 198118 May 1982Sherwood Medical Industries Inc.Method of making grooved plastic medical tubing
US4385635 *15 May 198131 May 1983Ruiz Oscar FAngiographic catheter with soft tip end
US4469483 *25 Ago 19824 Sep 1984Baxter Travenol Laboratories, Inc.Radiopaque catheter
US4588399 *3 Abr 198413 May 1986Shiley IncorporatedCannula with radiopaque tip
US4657024 *19 Ago 198514 Abr 1987Teleflex IncorporatedMedical-surgical catheter
US4669465 *10 Dic 19842 Jun 1987Gv Medical, Inc.Laser catheter control and connecting apparatus
US4722344 *23 May 19862 Feb 1988Critikon, Inc.Radiopaque polyurethanes and catheters formed therefrom
US4790331 *2 Dic 198613 Dic 1988Sherwood Medical CompanyMethod for placement of catheter in a blood vessel
US4883474 *16 Jun 198728 Nov 1989David S. SheridanThoracic catheter
US4981470 *21 Jun 19891 Ene 1991Synectics Medical, Inc.Intraesophageal catheter with pH sensor
US4989608 *28 Abr 19895 Feb 1991Ratner Adam VDevice construction and method facilitating magnetic resonance imaging of foreign objects in a body
US5078701 *5 Oct 19907 Ene 1992Bissell Medical Products, Inc.Wire guided intestinal catheter
US5102401 *22 Ago 19907 Abr 1992Becton, Dickinson And CompanyExpandable catheter having hydrophobic surface
US5165975 *30 Abr 199124 Nov 1992Junkosma Co., Ltd.Contrast medium-containing tube
US5177170 *2 Jul 19925 Ene 1993Miles Inc.Radiopaque polyurethanes
US5346981 *13 Ene 199313 Sep 1994Miles Inc.Radiopaque polyurethanes
US5438985 *25 Ene 19938 Ago 1995Synectics Medical, IncorporatedAmbulatory recording of the presence and activity of substances in gastro-intestinal compartments
US5477854 *16 Sep 199326 Dic 1995Synectics Medical, Inc.System and method to monitor gastrointestinal Helicobacter pylori infection
US5477860 *5 Nov 199226 Dic 1995Synectics Medical, Inc.Catheter for measuring respiration and respiratory effort
US5479935 *21 Oct 19932 Ene 1996Synectics Medical, Inc.Ambulatory reflux monitoring system
US5507289 *23 Mar 199416 Abr 1996Synectics Medical, Inc.System and method to diagnose bacterial growth
US5538512 *8 Jul 199423 Jul 1996Zenzon; Wendy J.Lubricious flow directed catheter
US5551425 *18 Ene 19953 Sep 1996Synectics Medical, Inc.Potential difference and perfusion pressure catheter
US5554138 *12 Dic 199410 Sep 1996MedovationsThoracic catheter with elongated pulling lead
US5657759 *6 Ene 199519 Ago 1997Synectics Medical, IncorporatedMeasurement of gastric emptying and gastrointestinal output
US5730733 *31 May 199624 Mar 1998Scimed Life Systems, Inc.Flow assisted catheter
US5810741 *21 Dic 199522 Sep 1998Synectics Medical AbMethod of measuring respiration and respiratory effort using plural catheters
US5833625 *19 Dic 199510 Nov 1998Synectics Medical AbAmbulatory reflux monitoring system
US5895424 *12 Nov 199620 Abr 1999Mentor CorporationProsthesis having an alignment indicator and method of using same
US5899892 *7 Nov 19974 May 1999Scimed Life Systems, Inc.Catheter having distal fiber braid
US5908413 *3 Oct 19971 Jun 1999Scimed Life Systems, Inc.Radiopaque catheter and method of manufacture thereof
US5919170 *7 Jun 19956 Jul 1999Mentor CorporationUrinary catheter
US5944712 *31 Oct 199631 Ago 1999Medtronic Ave, Inc.Catheter size designation system
US5947939 *14 Mar 19977 Sep 1999Scimed Life Systems, Inc.Flow assisted catheter
US5961511 *28 Oct 19985 Oct 1999Scimed Life Systems, Inc.Catheter having LCP reinforced distal portion
US6036682 *2 Dic 199714 Mar 2000Scimed Life Systems, Inc.Catheter having a plurality of integral radiopaque bands
US6077258 *3 Oct 199720 Jun 2000Scimed Life Systems, Inc.Braided angiography catheter having full length radiopacity and controlled flexibility
US6132372 *1 Abr 199717 Oct 2000Synectics Medical, IncorporatedMeasurement of gastric emptying and gastrointestinal output
US61937053 Sep 199927 Feb 2001Scimed Life Systems, Inc.Flow assisted catheter
US679906726 Dic 200128 Sep 2004Advanced Cardiovascular Systems, Inc.MRI compatible guide wire
US68452592 Ene 200318 Ene 2005Advanced Cardiovascular Systems, Inc.MRI compatible guide wire
US746970025 Jun 200330 Dic 2008Trudell Medical LimitedNebulizing catheter system for delivering an aerosol to a patient
US7472705 *25 Jun 20036 Ene 2009Trudell Medical LimitedMethods of forming a nebulizing catheter
US750721117 Nov 200424 Mar 2009Advanced Cardiovascular Systems, Inc.Guide wire and method of making same
US770424513 Abr 200427 Abr 2010Cook IncorporatedLarge diameter delivery catheter/sheath
US79145171 Nov 200429 Mar 2011Trudell Medical InternationalSystem and method for manipulating a catheter for delivering a substance to a body cavity
US79680388 Mar 201028 Jun 2011Cook Medical Technologies LlcLarge diameter delivery catheter/sheath
US822670218 May 200924 Jul 2012Boston Scientific Scimed, Inc.Prosthesis deployment device with translucent distal end
US853536920 Jul 201217 Sep 2013Boston Scientific Scimed, Inc.Prosthesis deployment device with translucent distal end
US20040084049 *25 Jun 20036 May 2004Trudell Medical LimitedNebulizing catheter system and methods of use and manufacture
US20040084050 *25 Jun 20036 May 2004Trudell Medical Limited.Nebulizing catheter system and methods of use and manufacture
US20050070793 *17 Nov 200431 Mar 2005Pacetti Stephen D.MRI compatible guide wire
US20050283226 *18 Jun 200422 Dic 2005Scimed Life Systems, Inc.Medical devices
DE1170113B *15 Sep 195914 May 1964Peter Zeiss Dr MedSchlingenkatheter zur Entfernung von Harnleitersteinen
DE1965487A1 *30 Dic 196919 Nov 1970Chemplast IncKatheter und Verfahren zu seiner Herstellung
DE2740063A1 *6 Sep 19779 Mar 1978Leveen Harry HBiegsamer schlauch
WO1982000413A1 *19 Jun 198118 Feb 1982Lab AbbottImproved radiopaque medical tubing
WO1984004664A1 *31 May 19836 Dic 1984Oscar Francisco RuizAngiographic catheter with soft tip end
WO1988003421A1 *14 Nov 198619 May 1988Mazzer Giacomo EzioFlexible tubing
WO1990015572A1 *15 Jun 199027 Dic 1990Synetics Medical IncIntraesophageal catheter
WO1994018886A1 *24 Feb 19941 Sep 1994Target Therapeutics IncFlow directed catheter
Clasificación de EE.UU.600/435, 604/529
Clasificación internacionalA61M25/01, A61M25/098, A61M25/095
Clasificación cooperativaA61M25/0108
Clasificación europeaA61M25/01C1