System and method for treating ischemic stroke
First Claim
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1. A system for removing thromboembolic material from a blood vessel in a patient, the system comprising:
- a catheter proportioned for delivery into a blood vessel, the catheter including a catheter lumen;
a first elongate member, and a receiver on a distal portion of the first elongate member, the receiver formed of a plurality of structural members arranged to form a sleeve having a central lumen, a plurality of the structural members comprising engaging elements extending into the central lumen; and
a second elongate member extendable through the catheter lumen and having a separator element thereon, the separator element shaped such that movement of the separator element into contact with a body of thromboembolic material in a blood vessel separates pieces of thromboembolic material from the body.
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Abstract
A thromboembolic removal system for treating ischemic stroke, including a guide and occlusion catheter, a delivery and aspiration catheter, an aspiration pump, a thromboembolic receiver, and a thromboembolic separator.
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Citations
32 Claims
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1. A system for removing thromboembolic material from a blood vessel in a patient, the system comprising:
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a catheter proportioned for delivery into a blood vessel, the catheter including a catheter lumen;
a first elongate member, and a receiver on a distal portion of the first elongate member, the receiver formed of a plurality of structural members arranged to form a sleeve having a central lumen, a plurality of the structural members comprising engaging elements extending into the central lumen; and
a second elongate member extendable through the catheter lumen and having a separator element thereon, the separator element shaped such that movement of the separator element into contact with a body of thromboembolic material in a blood vessel separates pieces of thromboembolic material from the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for removing thromboembolic material, from a blood vessel in a patient, the method comprising the steps of:
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providing a catheter proportioned for delivery into a blood vessel, the catheter including a catheter lumen, further providing a first elongate member and a receiver on a distal portion of the first elongate member, the receiver formed of a plurality of structural members arranged to form a sleeve having a central lumen, a plurality of the structural members comprising engaging elements extending into the central lumen, and further providing a second elongate member extendable through the catheter lumen and having a separator element thereon;
positioning a sheath within a blood vessel of a patient to be treated, the sheath having an occlusion balloon thereon;
occluding the blood vessel using the occlusion balloon;
determining the likely nature of a body of thromboembolic material within the blood vessel;
if the likely nature of the thromboembolic material is determined to be hard;
positioning the receiver, in the compressed position, within the catheter;
passing the catheter through the sheath into the blood vessel;
extending the receiver from the catheter;
advancing the receiver at least partially over the body of thromboembolic material, causing the body to be received into the central lumen, and causing the engaging elements to engage the body; and
withdrawing the receiver into the sheath;
if the likely nature of the thromboembolic material is determined to be soft;
passing the catheter through the sheath the blood vessel and positioning the catheter proximally of the body of thromboembolic material;
using the aspiration source, aspirating through the catheter lumen to draw thromboembolic material into and through the catheter lumen;
advancing the separator element from the catheter lumen in a distal direction to cause the separator element to contact a portion of the body of thromboembolic material; and
withdrawing the separator element towards the catheter lumen. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32-90. -90. (canceled)
Specification