Pharmaceutical storage and mixing syringe having high pressure a

Details Pharmaceutical storage and mixing syringe having high pressure a Pharmaceutical storage and mixing syringe having high pressure a

1993-10-20

1995-03-07

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604191, 604219, 604237, A61M 3700, A61M 500, A61M 5315

Patent

active

053953266

ABSTRACT:
A hand held syringe has a stationary handle and a moving handle to enable both stored and transported pharmaceuticals to be mixed and injecting the mixed pharmaceuticals under high pressure immediately after mixing through a long needle to a site interior of the body. The syringe is provided for squeeze grip at the stationary and moving handles between fingers and palm and includes a jell storage chamber side-by-side with a diluent storage chamber. Upon initial compression of the handles towards one another against a spring bias, the diluent discharges to the jell mix chamber along a one way path. At the same time, a handle actuated piston with loosely fitting O-ring in the jell mix chamber moves through the jell and introduced diluent effecting mixing movement by allowing the jell and diluent to flow between the piston and jell chamber sidewalls. Flow occurs from the jell chamber by the piston to an expansible chamber delimited by a floating seal. When injection is desired, the syringe is fully expanded against the spring bias and an O-ring on the reciprocating piston is tightened to radially dilate the O-ring to effect sealed wiping of the jell chamber. When full dilation of the O-ring has occurred, the long needle replaces a sealing plug at the distal end of the jell chamber of the syringe and injection occurs under the full squeeze force developed by the digits against the human palm.

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