Thrombectomy catheter system with occluder and method of using same
First Claim
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1. A method for thrombectomy comprising the steps of:
- a. providing a guide catheter, the guide catheter having a distal end and a proximally situated manifold with a hemostasis nut and a lumen, and providing an occluder guidewire tube having a proximal end and a distal end, with a guidewire coil and an occluder at the distal end, and providing a capture catheter, the capture catheter having a distal end with a retractable capture cone and a fluid jet emanator affixed thereto, the fluid jet emanator including at least one proximally directed jet orifice, and a proximally located manifold, the proximally located manifold having an exhaust branch, a high pressure connection branch, and a hemostasis valve adapted for passage of the occluder guidewire tube;
b. advancing the distal end of the guide catheter into a vessel to a position adjacent to and proximal to a thrombus buildup;
c. loading and advancing the distal end of the occluder guidewire tube through the hemostasis nut and into and through the manifold of the guide catheter and thence through the lumen of the guide catheter;
d. advancing the distal end of the occluder guidewire tube, including the guidewire coil and the occluder, beyond the distal end of the guide catheter and through and beyond the thrombus buildup;
e. loading the distal end of the capture catheter, including the retractable capture cone and the fluid jet emanator over the proximal end of the occluder guidewire tube;
f. expanding the occluder to occlude the vessel;
g. positioning the capture catheter to an appropriate position and expandingly deploying the retractable capture cone adjacent to and just beyond the distal end of the guide catheter, thereby isolating the thrombus in the vessel between the deployed retractable capture cone and the expanded occluder;
h. providing and activating a high pressure medium to the fluid jet emanator so as to form rearwardly directed fluid jets;
i. macerating, dislodging, reducing, and breaking up the thrombus with the fluid jets; and
,j. evacuating the macerated, dislodged, reduced and broken-up thrombus.
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Abstract
A thrombectomy catheter system with occluder and method of using same for removal of tissue, such as thrombus and the like, from a vessel in the body. Multiple catheters and an occluder-bearing guidewire tube at a thrombus site provide for expandable deployment of a compliant occluder against the vasculature walls distal to the thrombus. The expanded occluder is maneuvered proximally to urge thrombus into close proximity with a retractable capture cone located distally on a capture catheter where the thrombus is dislodged, entrained, and broken into pieces by the action of a fluid jet emanator and then evacuated through the capture catheter.
168 Citations
24 Claims
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1. A method for thrombectomy comprising the steps of:
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a. providing a guide catheter, the guide catheter having a distal end and a proximally situated manifold with a hemostasis nut and a lumen, and providing an occluder guidewire tube having a proximal end and a distal end, with a guidewire coil and an occluder at the distal end, and providing a capture catheter, the capture catheter having a distal end with a retractable capture cone and a fluid jet emanator affixed thereto, the fluid jet emanator including at least one proximally directed jet orifice, and a proximally located manifold, the proximally located manifold having an exhaust branch, a high pressure connection branch, and a hemostasis valve adapted for passage of the occluder guidewire tube; b. advancing the distal end of the guide catheter into a vessel to a position adjacent to and proximal to a thrombus buildup; c. loading and advancing the distal end of the occluder guidewire tube through the hemostasis nut and into and through the manifold of the guide catheter and thence through the lumen of the guide catheter; d. advancing the distal end of the occluder guidewire tube, including the guidewire coil and the occluder, beyond the distal end of the guide catheter and through and beyond the thrombus buildup; e. loading the distal end of the capture catheter, including the retractable capture cone and the fluid jet emanator over the proximal end of the occluder guidewire tube; f. expanding the occluder to occlude the vessel; g. positioning the capture catheter to an appropriate position and expandingly deploying the retractable capture cone adjacent to and just beyond the distal end of the guide catheter, thereby isolating the thrombus in the vessel between the deployed retractable capture cone and the expanded occluder; h. providing and activating a high pressure medium to the fluid jet emanator so as to form rearwardly directed fluid jets; i. macerating, dislodging, reducing, and breaking up the thrombus with the fluid jets; and
,j. evacuating the macerated, dislodged, reduced and broken-up thrombus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for thrombectomy comprising:
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a. a guide catheter, the guide catheter having a distal end and a proximally situated manifold with a hemostasis nut and a lumen; b. an occluder guidewire tube having a proximal end and a distal end, with a guidewire coil and an occluder at the distal end; and
,c. a capture catheter, the capture catheter having a distal end with a retractable capture cone and a fluid jet emanator affixed thereto, the fluid jet emanator including at least one proximally directed jet orifice, and the capture catheter having a proximally located manifold, the proximally located manifold having an exhaust branch, a high pressure connection branch, and a hemostasis valve adapted for passage of the occluder guidewire tube;
wherewith fluid and thrombus may be isolated in the vasculature between the retractable capture cone, when deployed, and the occluder, when expanded, then disrupted and macerated by action of fluid jets, for removal from the body by suction applied at the retractable capture cone, thereby avoiding undesired release of thrombus portions within the vasculature. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for thrombectomy comprising:
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a. a guide catheter, the guide catheter having a distal end and a lumen; b. an occluder guidewire tube having a proximal end and a distal end, with a guidewire coil and an occluder at the distal end; c. a capture catheter, the capture catheter having a distal end with a retractable capture cone and a fluid jet emanator, the fluid jet emanator affixed to the capture catheter and including a plurality of proximally directed jet orifices, and the capture catheter further having a proximally located manifold, the manifold having an exhaust branch, a high pressure connection branch, and a hemostasis valve, and a lumen communicating between the distal end of the capture catheter and exhaust branch and a high pressure lumen communicating between the high pressure connection branch and the fluid jet emanator affixed to the capture catheter; d. the capture catheter configured to pass through the lumen of the guide catheter, wherein the retractable capture cone is held in a retracted position when inside the lumen of the guide catheter; e. the occluder guidewire tube configured to pass through the lumen of the capture catheter, so that the plurality of proximally directed jet orifices are disposed about the guidewire tube; and
,f. wherewith fluid and thrombus may be isolated in the vasculature between the retractable capture cone, when deployed, and the occluder, when expanded, then disrupted and macerated by action of fluid jets, for removal from the body by suction applied at the retractable capture cone, thereby avoiding undesired release of thrombus portions within the vasculature.
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Specification