Self contained needle and shield
First Claim
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1. A surgical needle assembly, comprising:
- a hollow housing having a proximal end and a distal end and defining a slot therein, the slot having a medial portion, a distal portion and a proximal portion wherein the medial portion has a width that is less than the width of the distal portion and the proximal portion;
a hub movably disposed in the housing, the hub having a raised latching portion adapted to engage the distal portion of the slot when the hub is distal of the proximal end of the housing and to engage the proximal portion of the slot when the hub is adjacent the proximal end of the housing so as to axially lock the hub with respect to the housing;
a needle with a sharp distal tip and a proximal end affixed to the hub; and
a spring connected to the hub to bias the hub toward the slot.
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Abstract
A surgical needle is disclosed which is made up of two concentric tubes. The inner tube has a sharp tip like a conventional hypodermic or intravenous needle. The inner tube can be retracted into the outer tube after use. In one embodiment, the needle forms part of a catheter assembly. A catheter is mounted coaxially around the both tubes. The inner tube has a latching member attached to the end without the sharp tip. The latching member engages detents on a housing to hold the sharp tip in an extended position or a retracted position. The latching member is provided with a porous plug to assist in venting gases during catheter introduction.
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Citations
7 Claims
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1. A surgical needle assembly, comprising:
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a hollow housing having a proximal end and a distal end and defining a slot therein, the slot having a medial portion, a distal portion and a proximal portion wherein the medial portion has a width that is less than the width of the distal portion and the proximal portion; a hub movably disposed in the housing, the hub having a raised latching portion adapted to engage the distal portion of the slot when the hub is distal of the proximal end of the housing and to engage the proximal portion of the slot when the hub is adjacent the proximal end of the housing so as to axially lock the hub with respect to the housing; a needle with a sharp distal tip and a proximal end affixed to the hub; and a spring connected to the hub to bias the hub toward the slot. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification