Expandable occlusion apparatus
First Claim
1. A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising:
- (a) an elongated outer tubular member having at least one perforation proximate the distal end thereof;
(b) a generally non-elastic, hollow, expander member surrounding said outer tubular member proximate said distal end and sealingly connected to said outer tubular member at longitudinally spaced apart locations on either side of said perforation; and
(c) an elongated inner tubular member of a predetermined diameter less than the inner diameter of said outer tubular member and disposed within the lumen of said outer tubular member and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer and inner tubular members, through said perforation to fill the volume of said expander member and out the distal end of said outer tubular member.
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Accused Products
Abstract
A catheter assembly or catheter attachment for use in treatment of coronary artery disease resulting from atheromatous lesions whereby stenotic lesions can be dilated without interruption to the blood supply distal to the stenotic lesion being treated, the catheter further allowing blood pressure distal to the site to be measured throughout the treatment procedure. In one form of the invention, the catheter assembly comprises first and second coaxial telescoping tubes, the outer tube having a pattern of perforations through its side wall proximate the distal end thereof and an inelastic expander member sealed to its outer surface at spaced apart locations so as to span the pattern of perforations. The patient'"'"'s own blood may be perfused through the lumen of the outer tube between the outer surface of the inner tube and the inner surface of the outer tube and through the pattern of perforations to uniformly expand the inelastic expander member. The inner and outer tubes are tapered at their distal ends so as to facilitate insertion of the catheter assembly through a blood vessel and, by relative longitudinal displacement of the inner tube with respect to the outer tube, the pressure and rate of flow of blood from the open distal end of the catheter can be controlled from its proximal end. In an alternative arrangement, the inner tube is replaced with a cylindrical wire of a predetermined diameter less than the inner diameter of said outer tube. Further, the distal end portion of the outer tube may be made distensible so that it can be made to expand by applying a suitable pressure at the proximal end of the catheter, and the catheter may be provided with a highly flexible guidance pigtail for facilitating the insertions of the instrument into a blood vessel, without interfering with the expanding and perfusing functions of the instrument.
392 Citations
33 Claims
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1. A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising:
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(a) an elongated outer tubular member having at least one perforation proximate the distal end thereof; (b) a generally non-elastic, hollow, expander member surrounding said outer tubular member proximate said distal end and sealingly connected to said outer tubular member at longitudinally spaced apart locations on either side of said perforation; and (c) an elongated inner tubular member of a predetermined diameter less than the inner diameter of said outer tubular member and disposed within the lumen of said outer tubular member and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer and inner tubular members, through said perforation to fill the volume of said expander member and out the distal end of said outer tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A catheter attachment for facilitating coronary transluminal angioplasty/coronary perfusion procedures, comprising:
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(a) an enlongated expander mounting tube having at least one perforation proximate the distal end thereof; (b) a generally non-elastic, hollow, expander member surrounding said elongated expander member proximate said distal end and sealingly connected to said expander mounting tube at longitudinally spaced apart locations on either side of said perforation; and (c) an elongated generally cylindrical member of a predetermined diameter less than the inner diameter of said expander mounting tube and disposed within the lumen of said expander mounting tube and extending from the proximal end thereof beyond the distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said expander mounting tube perfuses between said expander mounting tube and said cylindrical member, through said perforation to fill the volume of said expander member and out the distal end of said expander mounting tube. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A catheter attachment for use in treatment of coronary artery disease, comprising:
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(a) an outer tubular member formed from a distensible, soft plastic material and having a central lumen a distal end and a proximal end and a relatively expandable segment formed thereon displaced a predetermined distance proximal of said distal end; and (b) an elongated generally cylindrical member of a predetermined diameter less than or equal to the inner diameter of said outer tubular member and disposed within the central lumen of said outer tubular member and extending from said proximal end thereof beyond said distal end thereof, the arrangement being such that a fluid introduced at said proximal end of said outer tubular member perfuses between said outer tubular member and said elongated generally cylindrical member to distend said relatively expandable segment to a desired diameter and out said distal end of said outer tubular member. - View Dependent Claims (27, 28, 29, 30)
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31. A catheter comprising, in combination:
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(a) a first, tubular member having an open end; (b) a second member of smaller diameter slidable within said first member to define a lumen between the inner wall of the first member and the outer wall of the second member; (c) valving means carried by said second member near one end thereof for engaging the second end of said first member and preventing access to said lumen lumenn; (d) and flexible guide means extending from the last named means in a direction away from said first member. - View Dependent Claims (32, 33)
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Specification