EP0730880A1
Expired / Lapsed
EP
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Catheter-advancement actuated needle retracted system
Assignee: Becton Dickinson and Co
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Filing: 1996-02-28
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Granted: —
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Expires: 2016-02-28
Abstract
Abstract A catheter-advancement actuated needle retraction system is disclosed herein. The invention includes a generally hollow barrel that houses a needle hub, which can include a flashback chamber. A needle is affixed to the distal end of the needle hub and is aligned to extend through an opening in the distal end of the barrel. The needle extends through a catheter hub and catheter affixed to the catheter hub. A spring is disposed in the barrel lumen to cooperate with the needle hub to urge the needle hub toward the proximal end of the barrel. A latch actuator is releasably engaged with the catheter hub. A latch which cooperates with the latch actuator is movable between one position which maintains the needle hub adjacent to the distal end of the barrel and a second position allowing the spring to urge the needle hub to the proximal end of the barrel. A mechanism may be provided to cushion the needle hub as it contacts the proximal end of the barrel by the force of the spring.
Inventors
- 👤 Timothy J. Erskine
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61M25/0631; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/3269; A61M5/322; A61M5/3232
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A catheter and needle introducer assembly, comprising: a barrel defining a barrel lumen and having a proximal end and a distal end, the distal end defining a distal wall with an opening extending therethrough; a catheter having a proximal end and a distal end; a catheter hub affixed to the proximal end of the catheter; a needle having a sharp distal tip and a proximal end; a needle hub having a proximal end and a distal end affixed to the proximal end of the needle, the needle hub being disposed in the barrel lumen such that the sharp distal tip of the needle initially extends distally of the distal wall of the barrel through the opening coaxially within the catheter; a spring cooperating with the needle hub to urge the needle hub toward the proximal end of the barrel; a means for retaining the needle hub adjacent to the distal end of the barrel; and a means for allowing the spring to force the needle hub toward the proximal end of the barrel.
Claim 2
Dependent Claim
119 words
The catheter and needle introducer assembly of claim 1 wherein the means for retaining a latch associated with the barrel to initially contact and hold the needle hub adjacent to the distal end of the barrel and to be movable to a position away from contact with the needle hub; and the means for allowing is a latch actuator with a proximal end and a distal end slidably mounted with respect to the barrel and being removably mounted at its distal end to the catheter hub whereby movement of the catheter hub away from the distal end of the barrel causes the latch actuator to cooperate with the latch to remove the latch from contact with the needle hub.
Claim 3
Dependent Claim
89 words
The catheter and introducer needle assembly of claim 1 wherein the means for retaining is a latch associated with the needle hub having an abutment at one end to engage the shoulder in the barrel when the needle hub is adjacent to the distal end of the barrel; and the means for allowing is a latch actuator that cooperates with latch to allow the spring to urge the needle hub toward the proximal end of the barrel when the catheter hub is moved distally with respect to the barrel.
Claim 4
Dependent Claim
87 words
The catheter and introducer needle assembly of claim 1 wherein the means for retaining is a latch associated with the barrel to initially contact and hold the needle hub adjacent to the distal end of the barrel and to be movable to a position away from contact with the needle hub; and the means for allowing is a tab affixed to the extension tube and extending through the slot in the barrel to engage the latch when the catheter is moved distally with respect to the barrel.
Claim 5
Dependent Claim
76 words
The catheter and introducer needle assembly of claim 1 wherein the means for retaining is a keyhole latch having an opening therein defining a small portion and a large portion and disposed about the needle hub; and the means for allowing is a camming rod longitudinally movable with respect to the barrel, the camming rod defining a rail which engages the keyhole latch to move the keyhole latch perpendicular to the movement of the camming rod.
Claim 6
Dependent Claim
61 words
The catheter and needle introducer assembly of any of claims 1-5 wherein the means for allowing includes a pair of longitudinally extending fingers each having a bulbous distal tip and the catheter hub defines a pair of detents formed in its inner wall to cooperate with the bulbous distal tips to removably connect the longitudinally extending fingers to the catheter hub.
Claim 7
Dependent Claim
37 words
The catheter and needle introducer assembly of any of claims 1-6 further comprising a means for cushioning the proximal end of the needle hub when the needle hub is retracted against the proximal end of the barrel.
Claim 8
Dependent Claim
29 words
The catheter and needle introducer assembly of claim 1 wherein the means for cushioning includes a plurality of tines longitudinally extending from the proximal end of the needle hub.
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