Apparatus and method for eliminating dislodged thrombus
First Claim
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1. Apparatus for insertion into a blood vessel for eliminating thrombus in the blood vessel, said apparatus comprising:
- a primary thrombolytic fluid delivery system comprising a first group of infusion ports for delivering a first amount of thrombolytic fluid which chemically reacts with an initially whole thrombus structure to cause the thrombus structure to chemically breakdown into several thrombus fragments smaller than the initially whole thrombus structure, and a secondary thrombolytic fluid delivery system, located axially spaced apart from the primary thrombolytic fluid delivery system, comprising a filter member for trapping the several thrombus fragments and a second group of infusion ports located in the filter member for delivering a second amount of thrombolytic fluid which chemically reacts with the several thrombus fragments to cause the several thrombus fragments to further chemically breakdown and completely dissolve in the filter member.
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Abstract
An apparatus (10) for eliminating dislodged thrombus (78) in a blood vessel (12) comprises a catheter (72) having a plurality of infusion ports (90) and a filter (76) attached to the catheter for trapping the dislodged thrombus carried by blood flow in the blood vessel. The infusion ports (90) are disposed within the filter (76) and are operable to deliver a thrombolytic fluid to dissolve the dislodged thrombus (78) trapped in the filter (76).
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Citations
11 Claims
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1. Apparatus for insertion into a blood vessel for eliminating thrombus in the blood vessel, said apparatus comprising:
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a primary thrombolytic fluid delivery system comprising a first group of infusion ports for delivering a first amount of thrombolytic fluid which chemically reacts with an initially whole thrombus structure to cause the thrombus structure to chemically breakdown into several thrombus fragments smaller than the initially whole thrombus structure, and a secondary thrombolytic fluid delivery system, located axially spaced apart from the primary thrombolytic fluid delivery system, comprising a filter member for trapping the several thrombus fragments and a second group of infusion ports located in the filter member for delivering a second amount of thrombolytic fluid which chemically reacts with the several thrombus fragments to cause the several thrombus fragments to further chemically breakdown and completely dissolve in the filter member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for intravascularly eliminating thrombus attached to a wall of a blood vessel, the method comprising the steps of:
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inserting a primary and a secondary thrombolytic fluid delivery system into the blood vessel, the secondary thrombolytic fluid delivery system including a filter basket located downstream from the thrombus and downstream from the primary thrombolytic fluid delivery system;
delivering a first amount of thrombolytic fluid from the primary thrombolytic fluid delivery system to cause the thrombus structure to chemically breakdown into several thrombus fragments smaller than the initially whole thrombus structure;
trapping the several thrombus fragments in the filter basket;
delivering a second amount of thrombolytic fluid from the secondary thrombolytic fluid delivery system to cause the several thrombus fragments to further chemically breakdown and completely dissolve in the filter basket;
collapsing the filter basket; and
retracting the primary and secondary thrombolytic fluid delivery systems from the blood vessel without substantially any thrombus remaining within the filter basket.
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Specification