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.

Patentes

  1. Búsqueda avanzada de patentes
Número de publicaciónUS2990605 A
Tipo de publicaciónConcesión
Fecha de publicación4 Jul 1961
Fecha de presentación30 Ene 1957
Fecha de prioridad30 Ene 1957
Número de publicaciónUS 2990605 A, US 2990605A, US-A-2990605, US2990605 A, US2990605A
InventoresDemsyk Paul
Cesionario originalDemsyk Paul
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Method of forming artificial vascular members
US 2990605 A
Resumen  disponible en
Imágenes(1)
Previous page
Next page
Reclamaciones  disponible en
Descripción  (El texto procesado por OCR puede contener errores)

July 4, 1961 P. DEMSYK" METHOD OF FORMING ARTIFICIAL VASCULAR MEMBERS Filed Jan. 30, 1957 United welm 2,990,605 METHOD OF FORMING ARTIFICIAL VASCULAR MEMBERS Paul Demsyk, 576 E. 25th St., Paterson, NJ. Filed Jan. 30, 1957, Ser. No. 637,287

Claims. (Cl. 28 76) .1 1

This invention relates to a method of forming artificial vascular members for implantation'in an animal body, including the body of the human species.

More particularly it relates to sectionsof blood vessels formed artificially of'textile material assuming the form of tubing when distended by blood or other fluid flowing therethrough. V i l One of the principal features of the present invention is that it affords a section of textiletubing which does not nearly or completely collapse when no fluid pressure is applied to the inside thereof, but which remains distended to a very substantial extent when empty.

Textile tubing for implants has hitherto been usually woven upon a loom, for example a loom of the type termed in the textile art Jacquard. The materials employed have usually been the synthetic textiles such as nylon and ethylene glycol te'rephthalic acid polyester (Dacron). Such tubes usually are 12. to 18 inches in length and appear to be two strips of flat tape, one superposed in parallel relation upon the other, and fastened to each other longitudinally alongboth edges or margins so that, up to the very moment when fluid pres sure is applied to the interior thereof, the two strips lie closely adjacent one another, i.e. the tube wallsassume a substantially completely collapsed state. This necessitates that some distention of thetubing be brought about by suitable physical manipulations, just prior to the implantation of the artifact within the biological organism, e.g. by applying super-atmospheric pressure of some fluid, such as air or blood, to the interior of the tubing. o v

The need for such physical manipulations is manifestly detrimental from the viewpoint of demanding precious time and distracting attention from the operative field at a highly critical moment. Likewise there always exists the risk of introducing foreign matter into the tubing, when such manipulations must be'restor-ted to, especially foreign matter which may prove later to have introduced pathogenic organisms into the vascular system, thereby often eventuating in unfortunate sequelae.

One object of this invention is to produce textile tubing for artificial vascular implants, which-tubing shall at all times remain open, or non-collapsed, to a substantial degree.

Another object of this invention is to avoid the necessity of a distending operation, prior to use, in connection with artificial vascular tubing.

A further object of this invention is to provide textile tubing which may assume the form of a Y or other junction shape and which remains open, so as to be ready for instant implantation.

With the above and other objects in view, as will hereinafter appear, the invention consists in the combination and arrangement of parts hereinafter set forth and illustrated in the accompanying drawings from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

Referring to the drawings wherein like reference characters designate like parts throughout the several views:

FIGURE 1 is a plan view of a section of implant tubing as first formed, before being subject to the treatment of this invention.

Patented July 4, 1961.

. 2 t FIGURE 2. is a cross sectional view on an enlatged scale, taken upon the line 2-2 of FIGURE 1. l

FIGURE 3 is a plan view of a tubinghaving inserted therein a forming tube. i FIGURE 4 is a sectional view, taken onthe line 4-4 OfFIGURE 3. j j FIGURE 5 is a diagrammatic view of a-steam chest, as used in this inventionrf e FIGURE dis a cross'sectional view ofafinished im planttubing. l FIGURE 7 is a cross sectional view of a modified form of implant tubing. 1 v a FIGURE 8 is a longitudinal section of a Y shaped implant, having formingtubes therein.

'Referring now to FIGURES l and 2, there is here shown a section of flattened tubing 5, havingselvage margins 6, 6; The appearance is that of two pieces of tape connected together in marginal fashion; From FIGURE 2, it is to be noted that the lumen which such tube must present, when carrying a stream of blood, is substantially completely blocked, instead of being inthe patent state which it is essential that it ultimately assume. The tubing material is preferably Dacron, as this presents the porosity which has been found to be a practical necessity in artificial implants, non-porous implants having usually failed to establishthemselves satisfactorily in a living organism, over an extended period of time.

Referring now to FIGURES 3 and 4, a tube or'rod 8 either hollow or solid, of relatively rigid material, such as metal or glass,of suitable diameter and length, is inserted within the Dacron tube 5, so as fully to distend the Dacron tube to a circular or oval cross section. Stainless steel has been found to be especially desirable as a material for this rigid tube. While a circular cross section is shown, an oval shaped rigid tube may also be employed.

Reference is now additionally made to FIGURE :5, which diagrammatically shows a steam chest 10, sometimes referred to as an autoclave. By dotted lines there is shown within this steam: chest the Dacron tubing 5 having therein the distending rigid tubing 8. It is to be understood that this steam chest will be supplied with the usual ancillary equipment adjuvant to the operation thereof, such as steam gauges, time indication and control means, superheated water vapor and steam supply, exhausts for conden'sed spent steam, and the like. The pressure in this steam chest is preferably not less than fifteen pounds and may go ashigh as twenty pounds.

The temperature found in the steam chest under such condition usually lies between 250? F. and 260 F. The length of treatment should be not less than ten minutes and may beextended up to a maximumof thirty minutes, beyond which time the results are less satisfactory. At the conclusion of the treatment, the usual procedure for'exhausting the steam under pressure takes place and the Dacron tubing together with the enclosed rigid tube 8, is removed from the steam chest. Upon removal of the rigid tube 8 from the Dacron tubing, the latter then assumes a form similar to that shown in FIGURE 6 of the drawings. In other words, it does not remain perfectly round, even though the rigid rod may have been round, but tends to assume an oval shape, with the margins 6 extending somewhat, in a plane at right angles to the shorter axis of the oval.

In FIGURE 7 there is shown an implant which is woven without the marginal portion 6. Such an implant tends to retain a closer approach to the round cross section of the rigid tube 8, when the latter has been removed therefrom.

Reference is now made to FIGURE 8 which shows one method of using this invention is order to construct an implant in the form of a junction. Such junction is usually in the form of a Y as shown in the drawings. The textile tubing is suitably woven and then a rigid tube orrod 20 is placed in the main line and two ancillary tubes 21, 21 are placed in the respective branch lines. The innermost ends of these rods may be shaped as shown in the drawings, so that they will substantially abut one another, without leaving any undue open space between the inner ends of the rods or tubes. 7 a

With this invention if sterilizing is necessary before implanting, the Dacron tube will hold the distended shape and form even though a rigid tube, rod or the like is not used at the elevated temperatures used in sterilizing.

Without further elaboration, the foregoing will so fully explain the invention that othersmay, by applying current knowledge, readily adapt the same for use under various conditions of service. Moreover, it is not indispensable that all the features of the invention be used conjointly since they may be employed advantageously in various combinations and subcombinations.

It is obvious that the invention is not confined solely to the use herein disclosed in connection therewith as it may be utilized for any purpose to which it is adaptable. It is therefore to be understood that the invention is not limited to the specific construction as illustrated and described, as the same is only illustrative of the principles involved which are capable of extended application in various forms, and the invention comprehends all construction within the scope of the appended claims.

What I claim is:

1. The method of forming an artificial vascular implant, consisting of the steps of forming a fabric tube consisting essentially of Dacron and which lies flattened and with collapsed walls when the internal and external pressures are equal, inserting within said fabric tube a rigid rod, having an external diameter only slightly less than the interior diameter of the fabric tube when the latter is distended, subjecting said tube and the rod held therewithin to a temperature of between about 250 F. and about 260 F. in an atmosphere composed chiefly of superheated water vapour and steam for at least ten minutes and not over thirty minutes, restoring said tube and rod to normal atmospheric temperatures and pressure, and removing said rod, whereby said fabric tube remains at least partly opened and with the walls thereof uncollapsed.

2. The method of forming an artificial vascular implant which will remain at least partly distended when the internal and external pressures are equal, consisting of the steps of forming a woven fabric tube consisting of Dacron and normally lying flat with the opposite walls in contact with one another, applying internal pressure to the walls of said tube, so that it assumes a substantially completely distended condition, subjecting the exterior wall of said tube to superheated water vapor and steam at between fifteen and twenty pounds pressure for between ten and thirty minutes, and removing the internal pressure from said tube, whereby the tube remains at least partly distended when no further pressure is applied to the interior thereof.

3. The method according to claim 2, wherein the external superheated water vapor and steam pressure is applied to the tube by temporarily confining the latter within a steam chest.

4. The method of forming an artificial vascular implant in the shape of a Y, consisting of the steps of forming a fabric tube in the shape of a Y, said tube consisting essentially of Dacron and the walls of said tube normally lying in a collapsed position, inserting in the main portion of the Y a relatively rigid rod and in each branch of the Y inserting another respective relatively rigid rod, the abutting ends of all three rods being so shaped as to meet one another without affording any substantial space therebetween, exposing the fabric tube containing said rods to superheated water vapor and steam pressure of from about fifteen to about twenty pounds for from about ten to about thirty minutes, and removing said rigid rods, whereby the Y shaped fabric tube so produced remains at least partly opened when subject to equal pressure within and without.

5. A method of making an artificial vascular implant consisting of forming a normally flat, woven, Dacron tube including two superposed fabric layers joined together at marginal portions of the tube, inserting a rod longitudinally through the space between said fabric layers to distend said normally fiat tube, subjecting the distended tube with the rod therein to an atmosphere comprising superheated water vapour and steam at about fifteen to twenty pounds pressure and 250 F. to 260 F. for between ten and thirty minutes, and then removing said rod from said tube, whereby the fabric layers of the woven Dacron tube will remain separated in the central portions thereof so that the tube will be partly open.

References Cited in the file of this patent UNITED STATES PATENTS 439,451 Ward Oct. 28, 1890 718,378 Painter Jan. 13, 1903 1,596,754 Moschelle Aug. 17, 1926 2,624,341 Wallace Jan. 6, 1953 2,836,181 Tapp May 27, 1958 2,845,959 Sidebotham Aug. 5, 1958 FOREIGN PATENTS 164,179 Australia July 18, 1955 744,735 Great Britain Feb. 15, 1956 OTHER REFERENCES Hufnagel: The Use of Rigid and Flexible Plastic Protheses for Arterial Replacement, Surgery, February 1955, vol. 37, No. 2, pages -174. (Copy in 128-1.)

Edwards and Tapp: Chemically Treated Nylon Tubes as Arterial Grafts, Surgery, July 1955, vol. 38, pages 61-70, publishers, C. V. Mosby Co., St. Louis, Mo. (Copy in Patent Ofiice Library and Division 21 Class 139, subclass 387.)

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US439451 *14 Jul 189028 Oct 1890 Joseph d
US718378 *6 Oct 189813 Ene 1903Gen ElectricInsulating-lining and process of making same.
US1596754 *30 Oct 192317 Ago 1926Moschelle Judson DReenforced tubing
US2624341 *18 Jul 19506 Ene 1953American Cystoscope Makers IncCatheter
US2836181 *17 Ene 195527 May 1958Chemstrand CorpFlexible nylon tube and method for preparing same
US2845959 *26 Mar 19565 Ago 1958Sidebotham John BBifurcated textile tubes and method of weaving the same
AU164179B * Título no disponible
GB744735A * Título no disponible
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US3142067 *16 Feb 196128 Jul 1964William J LiebigSynthetic vascular implants
US3805301 *28 Jul 197223 Abr 1974Meadox Medicals IncTubular grafts having indicia thereon
US4191218 *28 Abr 19784 Mar 1980Albany International Corp.Fabrics for heart valve and vascular prostheses and methods of fabricating same
US4209859 *29 Mar 19781 Jul 1980Meadox Medicals, Inc.Ligament and tendon prosthesis of polyethylene terephthalate and method of preparing same
US4915893 *15 Jul 198310 Abr 1990Medtronic, Inc.Method of preparing polyester filament material
US5110852 *27 Oct 19885 May 1992Rijksuniversiteit Te GroningenFilament material polylactide mixtures
US5489295 *21 May 19936 Feb 1996Endovascular Technologies, Inc.Endovascular graft having bifurcation and apparatus and method for deploying the same
US5824039 *19 Ene 199620 Oct 1998Endovascular Technologies, Inc.Endovascular graft having bifurcation and apparatus and method for deploying the same
US5824047 *11 Oct 199620 Oct 1998C. R. Bard, Inc.Vascular graft fabric
US6077296 *4 Mar 199820 Jun 2000Endologix, Inc.Endoluminal vascular prosthesis
US6090128 *20 Feb 199718 Jul 2000Endologix, Inc.Bifurcated vascular graft deployment device
US6117117 *24 Ago 199812 Sep 2000Advanced Cardiovascular Systems, Inc.Bifurcated catheter assembly
US6156063 *28 May 19985 Dic 2000Endologix, Inc.Method of deploying bifurcated vascular graft
US6165195 *13 Ago 199726 Dic 2000Advanced Cardiovascylar Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US618703611 Dic 199813 Feb 2001Endologix, Inc.Endoluminal vascular prosthesis
US619704917 Feb 19996 Mar 2001Endologix, Inc.Articulating bifurcation graft
US621042216 Feb 20003 Abr 2001Endologix, Inc.Bifurcated vascular graft deployment device
US621043517 Ago 19993 Abr 2001Endovascular Technologies, Inc.Endovascular graft having bifurcation and apparatus and method for deploying the same
US621403815 Sep 199910 Abr 2001Endovascular Technologies, Inc.Method for deploying an endovascular graft having a bifurcation
US622109023 Sep 199924 Abr 2001Advanced Cardiovascular Systems, Inc.Stent delivery assembly
US62210989 Dic 199924 Abr 2001Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US625459310 Dic 19993 Jul 2001Advanced Cardiovascular Systems, Inc.Bifurcated stent delivery system having retractable sheath
US626131611 Mar 199917 Jul 2001Endologix, Inc.Single puncture bifurcation graft deployment system
US62646825 Oct 199924 Jul 2001Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US633119014 Ene 200018 Dic 2001Endologix, Inc.Endoluminal vascular prosthesis
US63615441 Dic 199926 Mar 2002Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US636155515 Dic 199926 Mar 2002Advanced Cardiovascular Systems, Inc.Stent and stent delivery assembly and method of use
US63719788 May 200116 Abr 2002Advanced Cardiovascular Systems, Inc.Bifurcated stent delivery system having retractable sheath
US638321324 Mar 20017 May 2002Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US638712026 Abr 200114 May 2002Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US642856724 Abr 20016 Ago 2002Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US647520822 Ene 20015 Nov 2002Advanced Cardiovascular Systems, Inc.Bifurcated catheter assembly
US64948758 Sep 200017 Dic 2002Advanced Cardiovascular Systems, Inc.Bifurcated catheter assembly
US650020215 Mar 200031 Dic 2002Endologix, Inc.Bifurcation graft deployment catheter
US650883528 Nov 200021 Ene 2003Endologix, Inc.Endoluminal vascular prosthesis
US650883614 Jun 200121 Ene 2003Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US654421915 Dic 20008 Abr 2003Advanced Cardiovascular Systems, Inc.Catheter for placement of therapeutic devices at the ostium of a bifurcation of a body lumen
US657931214 Jun 200117 Jun 2003Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US658239414 Nov 200024 Jun 2003Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcated vessels
US659931520 Nov 200129 Jul 2003Advanced Cardiovascular Systems, Inc.Stent and stent delivery assembly and method of use
US666003022 Dic 20009 Dic 2003Endologix, Inc.Bifurcation graft deployment catheter
US666366528 Feb 200116 Dic 2003Endologix, Inc.Single puncture bifurcation graft deployment system
US66731076 Dic 19996 Ene 2004Advanced Cardiovascular Systems, Inc.Bifurcated stent and method of making
US670944011 Jul 200223 Mar 2004Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US673352326 Jun 200111 May 2004Endologix, Inc.Implantable vascular graft
US674962817 May 200115 Jun 2004Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US678017416 Dic 200224 Ago 2004Advanced Cardiovascular Systems, Inc.Bifurcated catheter assembly
US680285616 Abr 200212 Oct 2004Advanced Cardiovascular Systems, Inc.Bifurcated stent delivery system having retractable sheath
US687522927 Ene 20035 Abr 2005Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US68966998 Oct 200324 May 2005Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US695157212 Ago 20034 Oct 2005Endologix, Inc.Bifurcated vascular graft and method and apparatus for deploying same
US695347530 Sep 200311 Oct 2005Endologix, Inc.Bifurcation graft deployment catheter
US695568816 Jul 200318 Oct 2005Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US709069419 Nov 200315 Ago 2006Advanced Cardiovascular Systems, Inc.Portal design for stent for treating bifurcated vessels
US746531528 Jul 200616 Dic 2008Advanced Cardiovascular Systems, Inc.Portal design for stent for treating bifurcated vessels
US74818377 Oct 200427 Ene 2009Advanced Cardiovascular Systems, Inc.Bifurcated stent delivery system having retractable sheath
US75208958 Abr 200221 Abr 2009Endologix, Inc.Self expanding bifurcated endovascular prosthesis
US77539507 Ago 200713 Jul 2010Advanced Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US78922773 May 200622 Feb 2011Endologix, Inc.Self expanding bifurcated endovascular prosthesis
US79553797 Ago 20077 Jun 2011Abbott Cardiovascular Systems Inc.Stent and catheter assembly and method for treating bifurcations
US795966721 Dic 200614 Jun 2011Abbott Cardiovascular Systems Inc.Catheter assembly and method for treating bifurcations
US80295587 Jul 20064 Oct 2011Abbott Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US803410025 Nov 200311 Oct 2011Endologix, Inc.Graft deployment system
US811885627 Jul 201021 Feb 2012Endologix, Inc.Stent graft
US814753525 Jul 20053 Abr 2012Endologix, Inc.Bifurcation graft deployment catheter
US816792525 Mar 20101 May 2012Endologix, Inc.Single puncture bifurcation graft deployment system
US82162951 Jul 200910 Jul 2012Endologix, Inc.Catheter system and methods of using same
US823604011 Abr 20087 Ago 2012Endologix, Inc.Bifurcated graft deployment systems and methods
US835719211 Mar 201122 Ene 2013Endologix, Inc.Bifurcated graft deployment systems and methods
US849164615 Jul 201023 Jul 2013Endologix, Inc.Stent graft
US852393112 Ene 20073 Sep 2013Endologix, Inc.Dual concentric guidewire and methods of bifurcated graft deployment
US876481218 Ene 20131 Jul 2014Endologix, Inc.Bifurcated graft deployment systems and methods
US880835029 Feb 201219 Ago 2014Endologix, Inc.Catheter system and methods of using same
US882156416 Feb 20122 Sep 2014Endologix, Inc.Stent graft
US883455422 Ago 200616 Sep 2014Abbott Cardiovascular Systems Inc.Intravascular stent
US888282620 Ago 200711 Nov 2014Abbott Cardiovascular Systems Inc.Intravascular stent
US894520228 Abr 20103 Feb 2015Endologix, Inc.Fenestrated prosthesis
US939310016 Nov 201119 Jul 2016Endologix, Inc.Devices and methods to treat vascular dissections
US954983518 Ago 201424 Ene 2017Endologix, Inc.Catheter system and methods of using same
US957910330 Abr 201028 Feb 2017Endologix, Inc.Percutaneous method and device to treat dissections
US968737414 Dic 201627 Jun 2017Endologix, Inc.Catheter system and methods of using same
US97007019 Jul 201211 Jul 2017Endologix, Inc.Catheter system and methods of using same
US975726216 Jul 201312 Sep 2017Endologix, Inc.Stent graft
US20020111675 *16 Abr 200215 Ago 2002Wilson W. StanBifurcated stent delivery system having retractable sheath
US20020165602 *8 Abr 20027 Nov 2002Douglas Myles S.Self expanding bifurcated endovascular prosthesis
US20030093109 *16 Dic 200215 May 2003Mauch Kevin M.Bifurcated catheter assembly
US20040138735 *21 Oct 200315 Jul 2004Shaolian Samuel M.Single puncture bifurcation graft deployment system
US20040204753 *12 Ene 200414 Oct 2004Shokoohi Mehrdad M.Endoluminal vascular prosthesis
US20050043779 *7 Oct 200424 Feb 2005Wilson W. StanBifurcated stent delivery system having retractable sheath
US20060265050 *28 Jul 200623 Nov 2006Grayson MorrisPortal design for stent for treating bifurcated vessels
US20060271163 *3 May 200630 Nov 2006Shokoohi Mehrdad MEndoluminal vascular prosthesis
US20060287713 *3 May 200621 Dic 2006Douglas Myles SSelf expanding bifurcated endovascular prosthesis
US20070112412 *16 Ene 200717 May 2007Endologix, Inc.Endoluminal vascular prosthesis
US20080009829 *30 Jul 200710 Ene 2008Abbott Cardiovascular Systems Inc.Balloon catheter having a branched distal section with secured branches
US20080009932 *7 Jul 200610 Ene 2008Diem Uyen TaStent and catheter assembly and method for treating bifurcations
US20080009933 *21 Dic 200610 Ene 2008Diem Uyen TaCatheter assembly and method for treating bifurcations
US20080051876 *20 Ago 200728 Feb 2008Advanced Cardiovascular Systems, Inc.Intravascular stent
US20080086190 *22 Ago 200610 Abr 2008Diem Uyen TaIntravascular stent
US20080215029 *3 Mar 20084 Sep 2008I-Flow CorporationPlaten pump
US20090012601 *5 Jul 20078 Ene 2009Abbott Cardiovascular Systems, Inc.Stent and catheter assembly and method for treating bifurcations
US20090105806 *23 Oct 200823 Abr 2009Endologix, IncStent
US20110054587 *28 Abr 20103 Mar 2011Endologix, Inc.Apparatus and method of placement of a graft or graft system
US20120071905 *3 Oct 201122 Mar 2012Girard Michael JMethod and apparatus for creating intrauterine adhesions
Clasificaciones
Clasificación de EE.UU.28/143, 623/901, 28/167
Clasificación internacionalA61L27/14, A61F2/06
Clasificación cooperativaA61F2/06, A61L27/14, Y10S623/901
Clasificación europeaA61F2/06, A61L27/14