Needle for membrane penetration

Details Needle for membrane penetration Needle for membrane penetration

1985-07-02

1987-05-19

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604164, A61M 2700

Patent

active

046664386

ABSTRACT:
A needle specifically configured to enhance membrane penetration comprising an inner solid substantially cylindrical body including a longitudinally disposed fluid aspiration channel formed in the upper surface thereof and an outer penetration tip formed on the outer portion of the inner solid substantially cylindricla body, the penetration tip including a longitudinally disposed concave fluid recess extending between a penetration point formed on outer end thereof and the upper surface of the inner solid substantially cylindrical body rearward of the outermost end of the longitudinally disposed fluid aspiration channel and a pair of planar surfaces formed on opposite sides of the penetration tip and the solid substantially cylindrical body, the pair of planar surfaces converging forwardly to the penetration point and diverging upwardly to the outer portion of the longitudinally disposed concave fluid recess to intersect a pair of arcuate cutting edges diverging upwardly and rearwardly from the penetration point.

REFERENCES:
patent: 2711733 (1955-06-01), Jacoby, Jr.
patent: 3030953 (1962-04-01), Koehn
patent: 3308822 (1967-03-01), De Luca
patent: 3352306 (1967-11-01), Hirsch
patent: 3459189 (1969-08-01), Alley et al.
patent: 3788320 (1974-01-01), Dye
patent: 3960153 (1976-06-01), Carey et al.
patent: 4037600 (1977-07-01), Poncy et al.

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