DEVICES AND METHODS FOR ACCESSING A CEREBRAL VESSEL
First Claim
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1. A system for removing an obstruction, comprising:
- a microcatheter having an outer diameter of 0.025-0.060 inch along a distal portion, the distal portion having a length of at least 10 cm from a distal end of the lumen;
a support catheter which is advanceable over the microcatheter, the support catheter having a distal portion having a lumen with a diameter of less than 0.040 inch and a length of at least 10 cm from a distal end.
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Abstract
The present invention is directed to methods and devices for accessing a cerebral vessel. The system includes a support catheter, which can be advanced into small and tortuous vessels. By advancing the support catheter nearer to the obstruction then can be achieved with conventional guide catheters, the support catheter reduces the likelihood vessel compression and collapse when manipulating a working catheter.
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Citations
28 Claims
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1. A system for removing an obstruction, comprising:
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a microcatheter having an outer diameter of 0.025-0.060 inch along a distal portion, the distal portion having a length of at least 10 cm from a distal end of the lumen; a support catheter which is advanceable over the microcatheter, the support catheter having a distal portion having a lumen with a diameter of less than 0.040 inch and a length of at least 10 cm from a distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A catheter, comprising:
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a body having a braided reinforcement, the braided reinforcement having at least 12 strands forming a diamond braid, the strands being paired together to form six pairs of strands with each strand in the pair extending parallel to the other strand in the pair, wherein at least three of the pairs of strands are wound in one direction and at least three other pairs of strands being wound in an opposite direction; a lumen. - View Dependent Claims (10, 11, 12, 13)
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14. A method of accessing a middle cerebral artery, comprising the steps of:
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providing an obstruction retriever, a microcatheter, a support catheter and a guide catheter; position a distal end of the guide catheter at a position proximal to the MCA; advancing the microcatheter through the guide catheter; and advancing the support catheter over at least the retriever so that a distal end of the support catheter is positioned in the middle cerebral artery. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A method of accessing a cerebral artery, comprising the steps of:
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providing a microcatheter, a support catheter and a guide catheter, positioning a distal end of the guide catheter at a position proximal to the middle cerebral artery; moving the microcatheter through the guide catheter so that a distal end of the micro catheter is positioned in a cerebral artery; and advancing the support catheter over the microcatheter with the support catheter extending through the guide catheter, the support catheter being advanced so that a distal end of the support catheter is positioned between the distal end of the guide catheter and the distal end of the microcatheter. - View Dependent Claims (23, 24, 25)
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26. A catheter, comprising:
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a body having a braided reinforcement, the braided reinforcement having at least 12 independent strands forming a diamond braid, the strands being paired together to form at least six pairs with each strand in the pair extending parallel to the other strand in the pair, each pair of strands including only two strands, wherein at least three of the pairs of strands are wound in one direction and at least three other pairs of strands being wound in an opposite direction, the strands being wound with 30-70 PIC, wherein each strand of each pair of strands extends parallel to the other strand without strands wound in the opposite direction positioned therebetween, and each pair of strands wound in one direction being separated from adjacent pairs of strands wound in the same direction by one pair of strands wound in the opposite direction; a lumen extending through the body having an inner diameter of 0.020 to 0.039 inch. - View Dependent Claims (27, 28)
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Specification