Method of removing a thrombus from a large vein
First Claim
1. A method of capturing and removing a thrombus from a large vein in a patient, comprising:
- identifying a large vein having an occlusive thrombus;
selecting a thrombectomy device adapted for percutaneous advancement through the vein, the thrombectomy device comprising a delivery sheath, a self-expanding filter body, and an inner catheter, wherein an agitation member is disposed along a distal end portion of the inner catheter;
inserting the sheath through a peripheral access site and into the vein;
advancing the sheath until a distal end of the sheath is positioned proximal to the thrombus;
deploying the filter body at a location distal to the sheath and proximal to the thrombus, the filter body having a tapered proximal end portion and an open distal end, the filter body having an interior volume shaped to funnel particles toward a center of the filter body, the filter body made from a nickel-titanium alloy and having an exterior surface shaped to conform to an inner wall of the vein;
longitudinally advancing the inner catheter through the sheath and through the filter body such that the agitation member is positioned distal to the filter body;
contacting the thrombus with the agitation member;
moving the agitation member to agitate and disrupt the thrombus;
capturing resulting thrombus particles with the filter body;
applying negative pressure through a central lumen of the sheath for aspirating remaining particles; and
withdrawing the thrombectomy device from the patient and restoring blood flow through the vein.
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Accused Products
Abstract
A method of capturing and removing a thrombus from a large vein is performed using a percutaneous thrombectomy device. The thrombectomy device includes a delivery sheath, a filter body, and an inner catheter provided with an agitation member. The sheath is advanced until a distal end is positioned proximal to the thrombus. The filter body is deployed distal to the sheath and proximal to the thrombus. The filter body preferably has a funnel shape with a tapered proximal end portion and an open distal end. The inner catheter is advanced through the sheath for contacting the thrombus with the agitation member. The agitation member is actuated to disrupt the thrombus. Thrombus particles are captured using the filter body and negative pressure is preferably applied through the sheath. The method is well-suited for treating deep vein thrombosis and does not require the use of thrombolytic drugs.
99 Citations
20 Claims
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1. A method of capturing and removing a thrombus from a large vein in a patient, comprising:
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identifying a large vein having an occlusive thrombus; selecting a thrombectomy device adapted for percutaneous advancement through the vein, the thrombectomy device comprising a delivery sheath, a self-expanding filter body, and an inner catheter, wherein an agitation member is disposed along a distal end portion of the inner catheter; inserting the sheath through a peripheral access site and into the vein; advancing the sheath until a distal end of the sheath is positioned proximal to the thrombus; deploying the filter body at a location distal to the sheath and proximal to the thrombus, the filter body having a tapered proximal end portion and an open distal end, the filter body having an interior volume shaped to funnel particles toward a center of the filter body, the filter body made from a nickel-titanium alloy and having an exterior surface shaped to conform to an inner wall of the vein; longitudinally advancing the inner catheter through the sheath and through the filter body such that the agitation member is positioned distal to the filter body; contacting the thrombus with the agitation member; moving the agitation member to agitate and disrupt the thrombus; capturing resulting thrombus particles with the filter body; applying negative pressure through a central lumen of the sheath for aspirating remaining particles; and withdrawing the thrombectomy device from the patient and restoring blood flow through the vein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of capturing and removing a thrombus for treating deep vein thrombosis, comprising:
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selecting a thrombectomy device sized for percutaneous advancement through a large vein, the thrombectomy device comprising an elongate tubular delivery sheath, a self-expanding filter body formed with a permeable mesh structure, and an inner catheter having an agitation member disposed along a distal end portion thereof; inserting the sheath through a peripheral access site and into the vein; advancing the sheath until a distal end of the sheath is positioned proximal to a thrombus; deploying the self-expanding filter body at a location between the sheath and the thrombus, the filter body having a tapered proximal end portion and an open distal end when in an expanded configuration, the filter body forming an interior volume shaped to funnel particles toward a center of the filter body, the filter body having an exterior surface shaped to contact an inner wall of the vein; longitudinally advancing the inner catheter and agitation member through the sheath and through the filter body; contacting the thrombus with the agitation member; moving the agitation member to agitate and disrupt the thrombus; capturing thrombus particles with the filter body; applying negative pressure through a central lumen of the sheath; and removing the thrombectomy device and restoring blood flow through the vein. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of mechanically capturing and removing a thrombus for treating deep vein thrombosis without using thrombolytic drugs, comprising:
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selecting a thrombectomy device adapted for percutaneous advancement through a large vein, the thrombectomy device comprising a sheath, an outer catheter, a self-expanding filter body, and an inner catheter having an agitation member disposed along a distal end portion thereof; inserting the sheath through a peripheral access site and through the vein until a distal end of the sheath is positioned proximal to a thrombus; advancing the outer catheter in a distal direction for allowing the self-expanding filter body to self-expand from a constrained configuration to an expanded configuration, the filter body having a tapered proximal end portion and an open distal end when in the expanded configuration, the filter body comprising a permeable mesh structure made from a nickel-titanium alloy, the filter body having an exterior surface shaped to contact an inner wall of the vein; advancing the inner catheter through the sheath and through the filter body for contacting the thrombus with the agitation member; actuating the agitation member to disrupt the thrombus; capturing resulting thrombus particles with the filter body; and withdrawing the thrombectomy device from the patient and restoring blood flow through the vein. - View Dependent Claims (19, 20)
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Specification