Piercing needle

Details Piercing needle Piercing needle

1992-10-13

1994-03-01

Mancene, Gene

Surgery

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

Treating material introduced into or removed from body...

A61M 5178

Patent

active

052902463

ABSTRACT:
A piercing needle with which a flashback can be reliably confirmed and air can be prevented from remaining in its hub portion. The piercing needle comprises an outer needle having a hub, an inner needle to be inserted into the outer needle, a hub portion of which is adapted to be fitted in the outer needle hub, and a valve disc to close the internal cavity of the outer needle. Side holes are formed in the distal end of the outer needle. The outer needle hub is made in two parts, and is provided with a hydrophobic vent filter near the valve disc to allow the internal cavity of the outer needle hub to communicate with the outer atmosphere.

REFERENCES:
patent: 4149535 (1979-04-01), Volder
patent: 4200096 (1980-04-01), Charvin
patent: 4610665 (1986-09-01), Matsumoto et al.
patent: 4675017 (1987-06-01), Sato
patent: 4682980 (1987-07-01), Suzuki
patent: 4917671 (1990-04-01), Chang
patent: 4935010 (1990-06-01), Cox et al.
patent: 5032116 (1991-07-01), Peterson et al.
patent: 5104389 (1992-04-01), Deem et al.

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