Catheter having means for controlling the insertion depth
First Claim
1. Cardiovascular catheter apparatus of a size for introduction into a cardiovasuclar system, comprising:
- tube means having distal and proximal ends and a longitudinal axis, adapted for passing a fluid to or from a cardiovascular structure;
said tube means including a flexible, resilient deformable and radially extending depth control flange means, coupled to said tube means near said distal end, for controlling an insertion depth of said tube distal end into said cardiovascular structure, said flange means being constructed such that it is movable from a collapsed to an extended position thereby forming an obtuse angle with respect to said tube means; and
inflatable means, coupled to said tube means between said flange means and said distal end at a distance from said flange means to pinch vascular tissue, which tissue surrounds an opening, between said flange means and said inflatable means.
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Accused Products
Abstract
A catheter having a tube and a depth control flange to prevent the catheter tube from being over inserted. The preferred embodiment is a retrograde coronary sinus cardioplegia solution administration catheter. A depth control flange is coupled to the tube at a predetermined distance from the catheter tip. The flange is a disc made of soft plastic material which prevents over-insertion of the catheter tip when the flange abuts the wall of the atrium. The catheter tube further includes an inflatable balloon located between the flange and the catheter tip. After insertion into the coronary sinus, the balloon is inflated thus pinching the atrium wall between the flange and the balloon to prevent cardioplegia solution from flowing back from the coronary sinus into the atrium. A semi-rigid introducer tube surrounds a portion of the catheter tube and is axially movable with respect thereto. One end of the introducer tube includes a receptacle in which the flange is stored in a collapsed position. The compact apparatus is inserted into the atrium through a purse string opening in the atrium and then the introducer tube is held steady while the catheter tube is pushed toward the coronary sinus. The flange exits from the receptical and opens like an umbrella and engages the wall of the atrium, thus preventing over-insertion of the catheter in the coronary sinus. The catheter tube includes an air passageway used to inflate the balloon, and a fluid passageway used to provide the cardioplegia solution to the coronary sinus.
87 Citations
17 Claims
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1. Cardiovascular catheter apparatus of a size for introduction into a cardiovasuclar system, comprising:
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tube means having distal and proximal ends and a longitudinal axis, adapted for passing a fluid to or from a cardiovascular structure; said tube means including a flexible, resilient deformable and radially extending depth control flange means, coupled to said tube means near said distal end, for controlling an insertion depth of said tube distal end into said cardiovascular structure, said flange means being constructed such that it is movable from a collapsed to an extended position thereby forming an obtuse angle with respect to said tube means; and inflatable means, coupled to said tube means between said flange means and said distal end at a distance from said flange means to pinch vascular tissue, which tissue surrounds an opening, between said flange means and said inflatable means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Cardiovascular catheter apparatus of a size for introduction into a cardiovascular system, comprising:
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tube means having distal and proximal ends and a longitudinal axis, adapted for passing a fluid to or from a cardiovascular structure; said tube including a flexible, resilient depth control flange means, coupled to said tube means near said distal end, for controlling an insertion depth of said tube distal end into said cardiovascular structure, said flange being movable between an extended position where it extends radially from said tube means whereby it forms an obtuse angle with respect to said tube means, and a collapsed position where it is substantially collapsed on said tube means; tubular introducer means, coaxially surrounding and axially movable with respect to said tube means and having an insertion end storing the collapsed flange means, for introducing said tube means distal end into said cardiovascular structure; and inflatable means, coupled to said tube means between said flange means and said distal end at a distance from said flange means to pinch vascular tissue, which tissue surrounds an opening, between said flange means and said inflatable means. - View Dependent Claims (11, 12, 13)
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14. A method of inserting a cardiovascular catheter into a cardiovascular structure, comprising the steps of:
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inserting a catheter tube distal end into an opening in said cardiovasular structure; controlling an insertion depth of said tube distal end by abutting a flexible resilient flange, which flange is fixed to said catheter tube near said distal end, against vascular tissue surrounding said opening; and sealing said catheter tube distal end in said opening by inflating an inflatable balloon, said balloon coupled to said tube between said distal end and said flange at a predetermined distance from said flange, to cause said vascular tissues surrounding said opening to be pinched between the inflated balloon and said flange. - View Dependent Claims (15, 16, 17)
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Specification