Piercing and sampling probe

Details Piercing and sampling probe Piercing and sampling probe

A - Human Necessities

61

M

A61M 5/162 (2006.01) A61J 1/20 (2006.01) A61M 5/32 (2006.01)

Patent

CA 2134350

A needle for piercing a septum of a vacuum sealed container (34) and through which a measured fluid sample (32) from the container may be withdrawn. The needle comprises: an elongated body (10) with a longitudinal axis, an unobstructed bore (30) therethrough along said axis, a free end (28), and an end region (8) adjacent to said free end (28) which has a slight conical taper toward the free end (28) at a predetermined angle relative to the longitudinal axis. The free end (28) comprises an oblique cut through the conically tapered end region (8) at an angle (36) relative to the longitudinal axis being substantially larger than the predetermined angle of the taper so as to produce an elliptical opening (30) at the free end (28). The elliptical opening (30) lies along a plane to the longitudinal axis producing a toe or tip reduced in height for decreasing the dead volume of the needle.

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