Angiographic control syringe

Details Angiographic control syringe Angiographic control syringe

1993-09-03

1995-01-31

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604225, A61M 500, A61M 5315

Patent

active

053855582

ABSTRACT:
An improved angiographic control syringe for use in high-pressure medical procedures. An oblong locking ring disposed on a plunger stem. The oblong locking ring has two circular end segments at the far opposing ends of the ring, and comprises two flat segments at the narrow diameter opposing sides of the ring. A plurality of grooves are vertically spaced on the upper part of the plunger stem. Notches extend inwardly from the flat segments of the locking ring. The exertion of a pinching force on the circular end segments of the locking ring causes convex radial expansion of the flat segments, thereby permitting detachable engagement of the notches with any groove. The plunger head has a highly angular frustoconical head. The syringe barrel has a less angular frustoconical seat that receives the plunger head when the plunger head is fully depressed within the syringe barrel. Due to the difference between the angle of the plunger head and the angle of the seat, a circular air bubble retention cell is formed between the outer wall of the plunger head and the outer wall of the syringe barrel seat when the plunger is fully depressed.

REFERENCES:
patent: 1569457 (1926-01-01), Carstens
patent: 2856925 (1958-10-01), Helmer et al.
patent: 3752145 (1973-08-01), Runnells et al.
patent: 4444335 (1984-04-01), Wood et al.
patent: 4642102 (1987-02-01), Ohmori
patent: 4654035 (1987-03-01), Ando
patent: 4874385 (1989-10-01), Moran et al.
patent: 5009645 (1991-04-01), Silver et al.

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