US 2003/0171695 A1Published application

Needle assembly

AssigneeBecton, Dickinson and Company

InventorRobert Zurcher

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Abstract

A blood collection needle assembly includes a holder body having a tube receiving chamber and a needle receiving chamber. A proximal needle is mounted to the holder body and projects into the tube receiving chamber. A distal needle is slidably mounted in alignment with the needle receiving chamber. A spring is provided to urge distal needle into the needle receiving chamber, and a trigger is provided for selectively permitting or preventing proximal movement of the distal needle. A transverse passage between the two needles is formed from a transparent material and provides indication of venus axis. The blood collection needle assembly is used to collect a sample of blood in a conventional manner. After collection of the blood, the trigger is actuated to release the distal needle and the spring propels the distal needle in a proximal direction for safe shielding within the needle receiving chamber of the holder body.

Claims8

Dependent claims

A needle holder assembly for collecting samples of fluid, said assembly comprising:

a holder body having opposed proximal and distal ends, a tube receiving chamber extending into said proximal end of said holder body and a needle receiving chamber extending into said distal end of said holder body;
a proximal needle cannula having a distal end mounted to said holder body and a proximal end extending into said tube receiving chamber;
a distal needle cannula having proximal and distal ends, said distal needle cannula being mounted to said holder body for movement between a distal position where said distal end of said distal needle cannula projects beyond said distal end of said holder and a proximal position where substantially all of said distal needle cannula is within said needle receiving chamber of said holder body;
a passage for providing fluid communication between said distal and proximal needle cannula when said distal needle is in said distal position;
a spring for urging said distal needle cannula proximally and into said needle receiving chamber of said holder body;
and
a trigger for releasably holding said distal needle cannula in said distal position and against forces exerted by said spring means.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/365,760Filed 12 Feb 2003
Priority: 11 Mar 2002
Published: 11 Sep 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61B 5/150656
Comprising means to impede repositioning of protection sleeve from covering to uncovering position: semi-automatically triggered, i.e. in which…
A61B 5/15003
Source of blood: for venous or arterial blood
A61B 5/150389
Design of piercing elements: hollow piercing elements, e.g. canulas, needles, for piercing the skin
A61B 5/150473
Design of piercing elements: double-ended needles, e.g. used with pre-evacuated sampling tubes