Transseptal puncture apparatus
First Claim
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1. A device for puncturing the atrial septum of a patient, comprising:
- an outer needle comprising a blunt distal end and a lumen longitudinally disposed substantially therethrough;
a solid inner needle axially disposed in the lumen of the outer needle and moveable beyond the distal end of the outer needle, the solid inner needle comprising a first material and further comprising;
a proximal portion;
a distal portion having a proximal section that is more flexible than the proximal portion, the distal portion increasing in flexibility from the proximal section to a distal end and includes a sharp tip configured to pierce the atrial septum; and
an intermediate portion that is substantially straight, is more flexible than the proximal section of the distal portion, and has a circumference substantially equal to or greaterthan that of the proximal section of the distal portion, wherein the intermediate portion includes a second material that is different from the first material.
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Abstract
Devices and methods for performing a transeptal puncture procedure are described. In certain embodiments, the device includes a blunt outer needle, and a second inner needle disposed longitudinally through the lumen of the outer needle, wherein the inner needle is flexible, e.g., has a flexible portion and/or a bend or other non-traumatic conformation at its tip.
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Citations
22 Claims
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1. A device for puncturing the atrial septum of a patient, comprising:
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an outer needle comprising a blunt distal end and a lumen longitudinally disposed substantially therethrough; a solid inner needle axially disposed in the lumen of the outer needle and moveable beyond the distal end of the outer needle, the solid inner needle comprising a first material and further comprising; a proximal portion; a distal portion having a proximal section that is more flexible than the proximal portion, the distal portion increasing in flexibility from the proximal section to a distal end and includes a sharp tip configured to pierce the atrial septum; and an intermediate portion that is substantially straight, is more flexible than the proximal section of the distal portion, and has a circumference substantially equal to or greater than that of the proximal section of the distal portion, wherein the intermediate portion includes a second material that is different from the first material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A device for puncturing the atrial septum of a patient, comprising:
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an outer needle comprising a blunt distal end and a lumen longitudinally disposed substantially therethrough; and a solid inner needle axially disposed in the lumen of the outer needle and moveable beyond the distal end of the outer needle, the solid inner needle comprising a first material and further comprising; a proximal portion having a distal end; an intermediate portion having a proximal shoulder and a distal shoulder and comprising a second material that is different from the first material; and a distal portion having a proximal end abutting the distal shoulder and a sharp tip configured to pierce the atrial septum, the proximal end of the distal portion having a circumference substantially equal to or less than that of the intermediate portion; wherein the flexibility of the intermediate portion from the proximal shoulder to the distal shoulder is greater than the flexibility of the proximal end of the distal portion, and the flexibility of the proximal end of the distal portion is greater than the flexibility of the proximal portion, and wherein the distal portion increases in flexibility from the proximal end of the distal portion to the sharp tip and includes a taper extending to the sharp tip.
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Specification