|Número de publicación||USRE34695 E|
|Tipo de publicación||Concesión|
|Número de solicitud||US 07/968,236|
|Fecha de publicación||16 Ago 1994|
|Fecha de presentación||29 Oct 1992|
|Fecha de prioridad||25 Abr 1986|
|Número de publicación||07968236, 968236, US RE34695 E, US RE34695E, US-E-RE34695, USRE34695 E, USRE34695E|
|Inventores||Craig E. Mar, Lambert J. Diettrich, David W. Morrison|
|Cesionario original||Advanced Cardiovascular Systems, Inc.|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (4), Citada por (39), Clasificaciones (6), Eventos legales (2)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
.Iadd.This is a continuation of the application Ser. No. 07/471,226 which was filed on Jan. 26, 1990, now abandoned. .Iaddend.
This invention pertains generally to the insertion of elements such as catheters into the vascular system, and more particularly to a guide wire and method of manufacturing the same for use in larger vessels as, for example, in the arms, the legs and the carotid arteries.
Guide wires employed in coronary angioplasty are of relatively small diameter because of the relatively small size of the blood vessels and the luminal openings of the dilatation catheters which pass over the guide wires. To facilitate steering or placement within the cardiovascular system, a guide wire should be both relatively flexible toward its distal end and relatively rigid from a torsional standpoint over its entire length. These two desirable properties are somewhat inconsistent and difficult to achieve in practice. Examples of guide wires intended primarily for use in coronary angioplasty are found in U.S. Pat. Nos. 4,554,929 and 4,545,390.
While guide wires designed for coronary angioplasty can, at least in theory, also be employed in the peripheral organs such as the arms and legs, they may not have sufficient torsional rigidity for use in such applications. Another problem with guide wires and dilatation catheters is blood loss between the guide wire and the luminal wall of the catheter. Also, it is difficult to track a catheter with a relatively large luminal opening over a guide wire of relatively small diameter to a desired location. Ideally, the guide wire should fit closely within the luminal opening and loosely enough to permit the catheter to move freely along the wire, a result which is often difficult to achieve in practice.
It is in general an object of the invention to provide a new and improved guide wire.
Another object of the invention is to provide a guide wire in which the guide wire has both high torsional rigidity and good flexibility.
Another object of the invention is to provide a guide wire in which the guide wire fits closely within a dilation catheter and also allows the catheter to be advanced freely.
Another object of the invention is to provide a guide wire in which the guide wire is particularly suitable for use in larger vessels.
These and other objects are achieved in accordance with the invention by providing a guide wire in which a relatively flexible helical coil is positioned over the distal end portion of an elongated shaft which increases in flexibility toward its distal end. The coil also increases in flexibility toward its distal end and is affixed to the shaft at its proximal and distal ends and at an intermediate point near the distal end. Between the proximal end of the shaft and the proximal end of the coil, the shaft is covered with a jacket having an outer diameter substantially equal to the outer diameter of the coil. In one disclosed embodiment, the jacket is formed by heat shrinking a tubular sleeve of polyethylene about the shaft.
The single FIGURE of drawing is an enlarged, fragmented longitudinal sectional view of one embodiment of a guide wire according to the invention.
The guide wire comprises an elongated mandrel or shaft 11 having a relatively rigid proximal end portion and a relatively flexible distal end portion. The distal end portion increases in flexibility toward the distal end. In the embodiment illustrated, the shaft has a generally circular cross-section, and the distal end portion has sections 12, 13 of progressively smaller diameter and a flattened tip section 14 of generally rectangular cross-section. Relatively short conically tapered sections 16, 17 provide smooth transitions between the sections of different diameter. Alternatively, the distal end portion can have a single continuous taper rather than a series of discrete steps in diameter.
In one presently preferred embodiment, the shaft comprises a stainless steel wire which is ground by a centerless grinding process to form the sections of different diameter. Flattened section 14 is formed by rolling the distal tip of the wire after it is ground to the diameter of section 13.
The dimensions of the shaft are selected to provide the desired properties for the guide wire. The proximal end portion is generally on the order of 10-30% of the overall length of the shaft. In one example of a guide wire for use in the peripheral organs, the proximal end of the shaft has a diameter of 0.020 inch, section 12 has a diameter of 0.013 inch, section 13 has a diameter of 0.004 inch, and section 14 has a thickness of 0.002 inch. In this example, the shaft has an overall length on the order of 145-150 cm, section 12 has a length of about 12 cm, section 13 has a length of about 2 cm, and section 14 has a length of about 3 cm. Each of the transitional sections 16, 17 has a length of about 3-6 cm. For a more flexible guide wire, one or more of the sections can be reduced in diameter, or one of the sections of smaller diameter can be increased in length.
The properties of the guide wire can also be changed by employing a greater or lesser number of sections in the distal end portion of the shaft. For example, a section having a diameter of 0.015 inches might be added between the proximal end portion and section 12 in the example given above. This additional section might, for example, have a length on the order of 25 cm.
A relatively flexible helical coil 19 is positioned coaxially of the distal end portion of the shaft. The coil extends from a point prior to the midpoint of the shaft to the distal end of the shaft. The proximal end of the coil is affixed to the shaft by suitable means such as a band of cyanoacrylate adhesive 21, and the distal end of the coil is affixed to the distal end of the shaft. A tip 22 of radiopaque material such as gold is provided at the distal end of the coil, and in the embodiment illustrated, the distal ends of the coil and shaft are held together by the opaque material.
In one presently preferred embodiment, coil 19 is fabricated of a stainless steel wire coated with Teflon. The inside diameter of the coil corresponds to the diameter of the proximal end portion of shaft 11, and with a 0.020 inch shaft, the coil typically has an outside diameter of 0.035 inch. The windings of the coil are closely spaced except in the vicinity of tip section 14 where they are spread apart for increased flexibility and easier shaping. The spread portion of the windings extends about 2.5-3.5 cm back from tip 22 and is aligned with the flattened tip section 14 of the shaft or core 11. Helical coil 19 is also affixed to shaft 11 at an intermediate point 23 near the distal end of the shaft. Point 23 is spaced a short distance (e.g., 7-8 cm) from the distal end, and the connection between the coil and shaft at this point is made by suitable means such as brazing. This connection gives the coil an increased torsional rigidity and isolates the tip portion from the main body of the wire for greater flexibility when sharp bends are encountered.
A tubular sleeve or jacket 26 is mounted on shaft 11 between the proximal end of the shaft and the proximal end of coil 19. This sleeve is preferably fabricated of a heat shrinkable material such as polyethylene or Teflon, and it is shrunk tightly about the shaft. The outside diameter of the jacket is substantially equal to the outside diameter of the coil, thereby giving the jacket a thickness substantially equal to the thickness of the wire forming the coil, so that the guide wire has a substantially uniform diameter throughout its entire length. In a guide wire having an overall length of 145 cm, the jacket might be 45 cm long, and the coil might be 100 cm, with the distal end of the jacket abutting against the proximal end of the coil.
If desired, the tip portion of the guide wire beyond point 23 can be bent to a desired shape to facilitate steering of the guide wire.
In a presently preferred method of manufacture, shaft 11 is ground and rolled to the desired configuration. The heat shrinkable material is placed on the proximal end of shaft 11 and shrunk tightly about the shaft to form jacket 26. Coil 19 is coated with Teflon and placed over the distal end portion of the shaft. The proximal end of the coil is affixed to the shaft by cyanoacrylate adhesive 21, and the distal ends of the coil and shaft are brazed together with the radiopaque material which forms tip 22. The coil and shaft are also brazed together at the intermediate point 23.
The guide wire has a number of important features and advantages. It has a relatively high torsional rigidity and a flexible tip which is isolated from the main body of the wire. This facilitates steering and placement of the wire in the vascular system. The wire has a substantially uniform diameter throughout its entire length, and this minimizes blood loss between the wire and the luminal wall of a catheter advanced along the wire. The jacket on the proximal end of the shaft reduces friction and enhances the appearance of the guide wire.
It is apparent from the foregoing that a new and improved guide wire and method of manufacturing the same have been provided. While only certain presently preferred embodiments have been described in detail, as will be apparent to those familiar with the art, certain changes and modifications can be made without departing from the scope of the invention as defined by the following claims.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3789841 *||15 Sep 1971||5 Feb 1974||Becton Dickinson Co||Disposable guide wire|
|US4538622 *||10 Nov 1983||3 Sep 1985||Advanced Cardiovascular Systems, Inc.||Guide wire for catheters|
|US4554929 *||13 Jul 1983||26 Nov 1985||Advanced Cardiovascular Systems, Inc.||Catheter guide wire with short spring tip and method of using the same|
|US4619274 *||18 Abr 1985||28 Oct 1986||Advanced Cardiovascular Systems, Inc.||Torsional guide wire with attenuated diameter|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US5460187 *||1 Jul 1994||24 Oct 1995||Boston Scientific Corp.||Fluoroscopically viewable guidewire|
|US5607419 *||24 Abr 1995||4 Mar 1997||Angiomedics Ii Inc.||Method and apparatus for treating vessel wall with UV radiation following angioplasty|
|US5673707 *||23 Sep 1994||7 Oct 1997||Boston Scientific Corporation||Enhanced performance guidewire|
|US5682894 *||26 Abr 1996||4 Nov 1997||Orr; Gregory C.||Guide wire|
|US5797856 *||5 Ene 1995||25 Ago 1998||Cardiometrics, Inc.||Intravascular guide wire and method|
|US5830156 *||11 Abr 1997||3 Nov 1998||Cabot Technology Corporation||Slip resistant guidewire|
|US5833682 *||26 Ago 1996||10 Nov 1998||Illumenex Corporation||Light delivery system with blood flushing capability|
|US5865768 *||30 Sep 1996||2 Feb 1999||Medtronic, Inc.||Guide wire|
|US6488637||30 Abr 1996||3 Dic 2002||Target Therapeutics, Inc.||Composite endovascular guidewire|
|US6673025||16 Nov 1999||6 Ene 2004||Advanced Cardiovascular Systems, Inc.||Polymer coated guidewire|
|US6697667||31 May 2001||24 Feb 2004||Advanced Cardiovascular Systems, Inc.||Apparatus and method for locating coronary sinus|
|US6716178||31 May 2001||6 Abr 2004||Advanced Cardiovascular Systems, Inc.||Apparatus and method for performing thermal and laser doppler velocimetry measurements|
|US6746422||22 Ago 2001||8 Jun 2004||Norborn Medical, Inc.||Steerable support system with external ribs/slots that taper|
|US7329223||31 May 2001||12 Feb 2008||Abbott Cardiovascular Systems Inc.||Catheter with optical fiber sensor|
|US7381198||8 Jun 2004||3 Jun 2008||Revascular Therapeutics, Inc.||Steerable distal support system|
|US7532920||31 May 2001||12 May 2009||Advanced Cardiovascular Systems, Inc.||Guidewire with optical fiber|
|US7553305||9 Jun 2005||30 Jun 2009||Enpath Medical, Inc.||Push-pull wire anchor|
|US7628763||24 Sep 2004||8 Dic 2009||Revascular Therapeutics, Inc.||Guidewire for crossing occlusions or stenoses|
|US7783338||9 Ene 2008||24 Ago 2010||Advanced Cardiovascular Systems, Inc.||Catheter with optical fiber sensor|
|US8043312||6 Jun 2005||25 Oct 2011||Revascular Therapeutics Inc.||Guidewire for crossing occlusions or stenoses|
|US8043314||27 Oct 2009||25 Oct 2011||Revascular Therapeutics Inc.||Guidewire for crossing occlusions or stenoses|
|US8056207||5 Jun 2009||15 Nov 2011||Greatbatch Ltd.||Push/pull wire anchor|
|US8162891||20 Nov 2009||24 Abr 2012||Revascular Therapeutics, Inc.||Delivery and exchange catheter for storing guidewire|
|US8353922||23 Sep 2011||15 Ene 2013||Revascular Therapeutics, Inc||Guidewire for crossing occlusions or stenoses|
|US8496680||19 Dic 2012||30 Jul 2013||Revascular Therapeutics Inc.||Guidewire for crossing occlusions or stenoses|
|US8540697 *||11 Oct 2011||24 Sep 2013||Greatbatch Ltd.||Push/pull wire anchor|
|US8657821||14 Nov 2008||25 Feb 2014||Revascular Therapeutics Inc.||Method and system for reversibly controlled drilling of luminal occlusions|
|US8747332||18 Jul 2013||10 Jun 2014||Revascular Therapeutics Inc.||Guidewire for crossing occlusions or stenoses|
|US9113955||26 Feb 2014||25 Ago 2015||Revascular Therapeutics, Inc.||Guidewire for crossing occlusions or stenoses|
|US20040167441 *||26 Feb 2003||26 Ago 2004||Reynolds Brian R.||Composite medical device|
|US20040265796 *||23 Ene 2004||30 Dic 2004||Thomas Briese||Methods and kits for detecting SARS-associated coronavirus|
|US20050119615 *||29 Nov 2004||2 Jun 2005||Norborn Medical, Inc.||Guidewire for crossing occlusions or stenoses|
|US20050228418 *||6 Jun 2005||13 Oct 2005||Revascular Therapeutics Inc.||Guidewire for crossing occlusions or stenoses|
|US20060074442 *||26 Sep 2005||6 Abr 2006||Revascular Therapeutics, Inc.||Guidewire for crossing occlusions or stenoses|
|US20070005008 *||9 Jun 2005||4 Ene 2007||Brian Honebrink||Push-pull wire anchor|
|US20080140101 *||7 Dic 2006||12 Jun 2008||Revascular Therapeutic, Inc.||Apparatus for crossing occlusions or stenoses|
|US20120053569 *||11 Oct 2011||1 Mar 2012||Greatbatch Ltd.||Push/Pull Wire Anchor|
|WO1996008995A1 *||22 Sep 1995||28 Mar 1996||Heart Techn Inc||Enhanced performance guidewire|
|WO1999022643A1 *||30 Oct 1998||14 May 1999||Lake Region Manufacturing Inc||Guidewire with disposition to coil|
|Clasificación de EE.UU.||600/585, 604/528|
|Clasificación cooperativa||A61M2025/09083, A61M25/09033|
|28 Jun 1995||FPAY||Fee payment|
Year of fee payment: 8
|28 Jun 1999||FPAY||Fee payment|
Year of fee payment: 12