Needle assembly with collapsible and retractable sheath

Details Needle assembly with collapsible and retractable sheath Needle assembly with collapsible and retractable sheath

1994-09-20

1996-04-30

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604198, A61M 532

Patent

active

055120504

ABSTRACT:
A needle cannula is surrounded by a collapsible sheath. The entire sheath can be retracted proximally on the needle cannula into a position where the distal tip of the needle cannula is visible to ensure optimal positioning and orientation for an injection. A spring may urge the entire sheath toward its distal position, and a lock may permit releasably retention of the entire sheath in its retracted proximal position.

REFERENCES:
patent: 4139009 (1979-02-01), Alvarez
patent: 4664654 (1987-05-01), Strauss
patent: 4795432 (1989-01-01), Karczmer
patent: 4998922 (1991-03-01), Kuracina et al.
patent: 5304151 (1994-04-01), Kuracina

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