Slotted regional anesthesia needle
First Claim
1. A hypodermic needle device comprising:
- a hypodermic needle having a barrel portion with inner and outer walls and a distal end and an opposed proximal end;
a slot axially directed along the length of said hypodermic needle from said distal end to said opposed proximal end, said slot having a minimum width dimension; and
an instrument having an instrument outer diameter, an instrument distal end and an instrument proximal end, inserted into said hypodermic needle device, said instrument comprising a hollow, cannulated stylet, and said slot minimum width dimension being less than said instrument outer diameter and not less than a dimension through which said hollow cannulated stylet can pass therethrough.
1 Assignment
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Accused Products
Abstract
A hypodermic needle device for administration of anesthesia to a patient'"'"'s epidural space comprising a hypodermic needle having a barrel portion with opposed distal and proximal ends, a hub assembly located at the proximal end of the barrel portion of the needle, through which instruments such as a rigid stylet, or a flexible catheter having a pre-affixed connector, may be introduced into the needle, and a slot formed axially along the length of the needle from the distal end through the hub at the proximal end of the needle. The slot has a minimum width dimension not greater than the outer diameter of a stylet or epidural catheter such that during location of the epidural space, and placement of a catheter in the epidural space, the stylet and catheter will not come out of the needle, yet the needle may be easily removed from the catheter once the catheter is in place, by pulling the catheter through the slot in the needle.
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Citations
7 Claims
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1. A hypodermic needle device comprising:
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a hypodermic needle having a barrel portion with inner and outer walls and a distal end and an opposed proximal end; a slot axially directed along the length of said hypodermic needle from said distal end to said opposed proximal end, said slot having a minimum width dimension; and an instrument having an instrument outer diameter, an instrument distal end and an instrument proximal end, inserted into said hypodermic needle device, said instrument comprising a hollow, cannulated stylet, and said slot minimum width dimension being less than said instrument outer diameter and not less than a dimension through which said hollow cannulated stylet can pass therethrough.
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2. A hypodermic needle device comprising:
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a hypodermic needle having a barrel portion with inner and outer walls and a distal end and an opposed proximal end; a hub assembly located at said opposed proximal end; a slot axially directed along the length of said hypodermic needle device from said distal end through said hub at said opposed proximal end said slot having a minimum width dimension; and an instrument having an instrument outer diameter, an instrument distal end and an instrument proximal end, inserted through said hub into said hypodermic needle device, said instrument comprising a hollow, cannulated stylet, and said slot minimum width dimension being less than said instrument outer diameter, and not less than a dimension through which said hollow cannulated stylet can pass therethrough. - View Dependent Claims (3, 4)
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5. An apparatus for administering regional anesthesia comprising:
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a hypodermic needle having a barrel portion with inner and outer walls and a distal end and an opposed proximal end; a slot axially directed along the length of said hypodermic needle from said distal end to said opposed proximal end, said slot having a minimum width dimension; means for locating the epidural space of a patient using a hollow cannulated stylet inserted within said inner walls of said hypodermic needle; means for identifying said locating of said epidural space and then removing said hollow cannulated stylet and replacing with a flexible catheter; and means for bringing said catheter into fluid communication with a source of liquid anesthesia for administration to a patient. - View Dependent Claims (6, 7)
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Specification