Fluid sampling apparatus

Details Fluid sampling apparatus Fluid sampling apparatus

1999-01-28

2001-02-27

Hindenburg, Max (Department: 3736)

Surgery

Diagnostic testing

Liquid collection

C600S573000, C604S211000

Reexamination Certificate

active

06193675

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to fluid sampling apparatus generally, and particularly to apparatus for sampling fluid from a puncturable conduit.
BACKGROUND OF THE INVENTION
Various types of apparatus for sampling fluids are known. In particular, various types of blood sampling apparatus are known in the art. The following patent documents are believed to represent the state of the art: U.S. Pat. Nos. 3,877,465; 4,763,648; 4,920,970; 4,934,015; 4,981,140; 5,002,066 & 5,084,034; European Patent Application 88906129.7 and PCT Published Patent Application WO 93/121821.
Often when blood is drawn from a donor and collected in a blood bag, it is desired to test samples of the blood before use thereof. In general, a plurality of tubing segments, which are sausage-like tubing pieces typically about 10 cm long, are attached to the blood bag. In blood bank laboratory tests, each segment is cut open with scissors and the contents are squeezed into a test tube. This can be a rather messy process.
SUMMARY OF THE INVENTION
The present invention seeks to provide improved and easy-to-use fluid sampling apparatus for use with puncturable conduits, which substantially overcomes the disadvantages of the prior art.
There is thus provided in accordance with a preferred embodiment of the present invention, apparatus for sampling fluid from a puncturable conduit, the apparatus including an elongate housing including a conduit puncturing portion and a clamp, the conduit puncturing portion being adapted to receive therein the puncturable conduit, a needle mount mounted in the elongate housing, a needle adapted for flow of fluid therethrough, the needle being fixedly mounted in the needle mount so as to have portions extending outward of the needle mount in opposite directions, a first end of the needle being pointed and protruding into, but not beyond, the conduit puncturing portion, such that the conduit puncturing portion substantially prevents inadvertent engagement of a user's finger with the first end of the needle, and a second end of the needle being in fluid communication with a fluid sampling tube, and wherein the clamp is operative to clamp the puncturable conduit in the conduit puncturing portion, thereby forcing the puncturable conduit towards the first end of the needle and causing the first end to puncture the puncturable conduit.
Additionally in accordance with a preferred embodiment of the present invention, the second end of the needle protrudes into, but not beyond, the elongate housing, such that the elongate housing substantially prevents inadvertent engagement of a user's finger with the second end of the needle.
Further in accordance with a preferred embodiment of the present invention, the conduit puncturing portion includes a conduit interface element which is substantially shaped complementarily to an outer periphery of the conduit.
The second end of the needle may be blunt. Alternatively, in accordance with another preferred embodiment of the present invention, the second end of the needle is pointed, and a puncturable resilient sheath is formed over the second end and onto at least a portion of the needle mount.
Additionally in accordance with a preferred embodiment of the present invention, the needle mount is removably mounted in the elongate housing.
Further in accordance with a preferred embodiment of the present invention, the needle is adhesively mounted in the needle mount.


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