Blood withdrawal apparatus and method

Details Blood withdrawal apparatus and method Blood withdrawal apparatus and method

1990-06-19

1992-05-19

Mancene, Gene

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604205, 604283, 604905, A61M 3100

Patent

active

051144000

ABSTRACT:
A blood withdrawal apparatus and method in which a blunt cannula or needle penetrates an elastomeric septum into a pressurized flow channel such as an arterial line. After blood is withdrawn into the attached syringe, the needle tip is withdrawn into the septum until an indication is detected, for example by engagement of a detent on a shroud surrounding the cannula or needle with a detent on the housing for the septum. The nurse can then depressurize the syringe by operating the piston and thus prevent blood spurt when the needle tip is subsequently fully withdrawn from the septum.

REFERENCES:
patent: 4022205 (1977-05-01), Tenczar
patent: 4799494 (1989-01-01), Wang
patent: 4865583 (1989-09-01), Tu
patent: 4935010 (1990-06-01), Cox et al.
patent: 4981140 (1991-01-01), Wyatt
patent: 4981469 (1991-01-01), Whitehouse et al.
patent: 4986278 (1991-01-01), Ravid et al.
patent: 4998927 (1991-03-01), Vaillancourt

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