Medical needle
First Claim
1. In a needle comprising a hollow shaft having opposed distal and proximal ends, the distal end having a cutting surface for insertion into a patient, the needle shaft having a lumen extending from the proximal end of the needle shaft and terminating at an opening on the top of the distal end of the needle shaft;
- the improvement comprising the cutting surface, wherein the cutting surface comprises a sharpened edge and extends along a portion of the bottom of the distal end of the hollow shaft.
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Accused Products
Abstract
A needle comprising a hollow shaft having opposed distal and proximal ends, the hollow shaft having a lumen extending from the proximal end of the shaft and terminating at an opening on a top of and proximal to the distal end of the needle shaft. A cutting surface is at the distal end of the hollow shaft adapted to be inserted into a patient, wherein the cutting surface is on the bottom of the distal end of the hollow shaft.
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Citations
21 Claims
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1. In a needle comprising a hollow shaft having opposed distal and proximal ends, the distal end having a cutting surface for insertion into a patient, the needle shaft having a lumen extending from the proximal end of the needle shaft and terminating at an opening on the top of the distal end of the needle shaft;
the improvement comprising the cutting surface, wherein the cutting surface comprises a sharpened edge and extends along a portion of the bottom of the distal end of the hollow shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A needle comprising:
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a hollow shaft having opposed distal and proximal ends, the hollow shaft having a lumen extending from the proximal end of the shaft and terminating at an opening on a top of and proximal to the distal end of the needle shaft; and
a cutting surface at the distal end of the hollow shaft to be inserted into a patient, wherein the cutting surface comprises a sharpened edge and extends along a portion of the bottom of the distal end of the hollow shaft. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method of installing a catheter in an epidural space of a patient comprising:
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(a) providing a needle comprising a hollow shaft having opposed distal and proximal ends, the distal end having a cutting surface for insertion into a patient, the needle shaft having a lumen extending from the proximal end of the needle shaft and terminating at an opening on the top of the distal end of the needle shaft, wherein the cutting surface comprises a sharpened edge and extends along a portion of the bottom of the distal end of the hollow shaft;
(b) pushing a needle into the epidural space with a cutting surface of the needle substantially parallel to dura fibers of the patient, wherein the needle comprises a substantially straight cutting surface;
(c) feeding a catheter through the needle and into the epidural space;
(d) removing the needle, while holding the catheter stationary; and
(e) securing the catheter.
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17. A needle kit comprising:
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a needle;
a lumen through the needle having a end on a top surface of a distal end of the needle;
a stylet to fit inside the lumen of the needle;
a catheter to fit inside the lumen of the needle; and
a hub to connect to a proximal end of the needle;
the improvement comprising a cutting surface on the needle, wherein the cutting surface comprises a sharpened edge and extends along a portion of a bottom surface of the distal end of the needle. - View Dependent Claims (18, 19, 20)
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21. A needle kit comprising:
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a needle;
a lumen through the needle having a end on a top surface of a distal end of the needle;
a stylet adapted to fit inside the lumen of the needle;
a catheter adapted to fit inside the lumen of the needle; and
a hub adapted to connect to a proximal end of the needle;
the improvement comprising a cutting surface on the needle, wherein the cutting surface is on a bottom surface of the distal end of the needle; and
a spinal needle adapted to fit inside the lumen of the needle.
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Specification