Component mixing syringe

Details Component mixing syringe Component mixing syringe

1990-06-05

1992-06-16

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604201, A61M 3700

Patent

active

051221179

ABSTRACT:
A component mixing syringe (2) is used to mix a liquid component (94) with a solid component (96) prior to use. The syringe includes a barrel (4) having a bore (10) with a plunger (20) at one end and a needle (54) at the other. A barrier (14) divides the bore into a far region (16) and a near region (18). The far region is divided into variable volume liquid and air compensating regions (88, 90) which contain the liquid and dry components. The plunger is partially withdrawn from the near region to create a partial vacuum. A pathway formed through the barrier is opened to permit the liquid to rush into the near region to create a relatively violent, turbulent mixing action to effectively mix the two components. The mixing can be further enhanced by moving the plunger along the bore forcing the mixture back and forth between the near and far regions. Once mixed, the pathway between the near and far regions is sealed and a pathway between the needle and the mixture in the near region is opened so that depressing the plunger forces the mixture through the needle.

REFERENCES:
patent: 2675804 (1954-04-01), Krug
patent: 3477431 (1969-11-01), Walecka
patent: 3747812 (1973-07-01), Karman et al.
patent: 4059109 (1977-11-01), Tischlinger
patent: 4668223 (1987-05-01), Grotenhuis
patent: 4755169 (1988-07-01), Sarnoff et al.
patent: 4758230 (1988-07-01), Rycroft
patent: 4841985 (1989-06-01), Wanamaker
patent: 4874377 (1989-10-01), Newgard et al.
patent: 4886495 (1989-12-01), Reynolds
patent: 4931040 (1990-06-01), Haber et al.

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