Perfusion procedure and apparatus for preventing necrosis following failed balloon angioplasty
First Claim
1. A method for maintaining a blood supply past a stenotic site after failure of a procedure wherein an angioplasty catheter is introduced into a blood vessel of a patient through a guide catheter and a sheath placed in the vessel and on a guide wire extended through the stenotic site, and wherein a vessel occlusion along the guide wire occurs following retraction of the angioplasty catheter from the site, said method comprising the following steps:
- (a) completely removing the angioplasty catheter from the vessel;
(b) introducing a perfusion catheter into the vessel of the patient through said guide catheter and extending a distal end of the perfusion catheter past the vessel occlusion using the guide wire, wherein the sheath placed in the vessel has an extraction port connecting through a proximal segment into the interior of said sheath;
(c) providing means for extracting the patient'"'"'s blood from said extraction port; and
(d) injecting blood into an exterior end of the perfusion catheter such as to maintain a perfusion rate sufficient to prevent ischemia.
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Accused Products
Abstract
A perfusion catheter is used to avoid ischemia in case of failure of a conventional balloon angioplasty procedure on a stenotic blood vessel and a resulting partial or complete occlusion of the vessel. The balloon catheter is first removed from the vessel while the guide wire and the guide catheter are left in place. The perfusion catheter is immediately inserted into the guide catheter and run past the stenosis using the guide wire already in place. Blood is drawn from a side port in the sheath introduced at the point of entry into the vascular system of the patient under normal arterial pressure or after passing through an exterior pump for pressurization and re-injection in the perfusion catheter. Thus, blood flow to the part of the vessel past the occlusion can be reestablished within minutes of angioplasty failure and the patient can be stabilized in preparation for heart surgery.
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Citations
14 Claims
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1. A method for maintaining a blood supply past a stenotic site after failure of a procedure wherein an angioplasty catheter is introduced into a blood vessel of a patient through a guide catheter and a sheath placed in the vessel and on a guide wire extended through the stenotic site, and wherein a vessel occlusion along the guide wire occurs following retraction of the angioplasty catheter from the site, said method comprising the following steps:
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(a) completely removing the angioplasty catheter from the vessel;
(b) introducing a perfusion catheter into the vessel of the patient through said guide catheter and extending a distal end of the perfusion catheter past the vessel occlusion using the guide wire, wherein the sheath placed in the vessel has an extraction port connecting through a proximal segment into the interior of said sheath;
(c) providing means for extracting the patient'"'"'s blood from said extraction port; and
(d) injecting blood into an exterior end of the perfusion catheter such as to maintain a perfusion rate sufficient to prevent ischemia. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification