Blood sampling devices

Details Blood sampling devices Blood sampling devices

1997-01-13

1999-06-22

Buiz, Michael

Surgery

Instruments

Cutting, puncturing or piercing

A61B 1734

Patent

active

059138688

ABSTRACT:
A lancet has a needle (2) embedded in a plastics body (1), its tip (3) projecting from the forward end but being initially encased in a cap (4). This cap (4) may be integrally moulded with the body, around the needle tip (3), and be sheared away before use. The needle (2) can be pushed back in relation to the body (1) after use, conveniently by applying the cap (4) to the tip (3), until the tip is safely flush with, or set back with respect to the leading end of the body (1). The rear end of the body (1) has a structure (9) to prevent the rear end of the needle (2) being pushed forwards again. To ensure that the tip disappears, the body (1) may be formed with an intermediate, resiliently flexible bridge (19) stiff enough to remain rigid during pricking. But when the needle (2) is forced back and pressure is also applied to the part of the body forward of the bridge (19), the needle (2) and that forward part move back with respect to the rear part of the body. Then the forward part is released to move forwards, sprung by the bridge (19), leaving the needle held by the rear part.

REFERENCES:
patent: 4889117 (1989-12-01), Stevens
patent: 5324302 (1994-06-01), Crouse
patent: 5385571 (1995-01-01), Morita

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