Method of in vitro testing one-way pressure gradient limiting va

Details Method of in vitro testing one-way pressure gradient limiting va Method of in vitro testing one-way pressure gradient limiting va

1996-10-09

1997-08-12

Millin, Vincent

Surgery

Devices transferring fluids from within one area of body to...

With flow control means

A61M 100

Patent

active

056560265

ABSTRACT:
A method for in vitro testing glaucoma drainage implants including one-way, pressure gradient limiting valves includes the provision of a fluid environment wherein surface tension effects on the valve are minimal or nonexistant, the location of the valve portion of the implant within the fluid environment, and the application of a gradually varying absolute or average pressure gradient having a small fluctuating pressure superimposed thereon against the valve such that the opening and closing pressures associated with the valve and the presence of any reflux through the valve under pressures below valve closing pressure can be readily and reproducibly determined in vitro.

REFERENCES:
patent: 4604087 (1986-08-01), Joseph
patent: 5433701 (1995-07-01), Rubinstein
Prata, Jr, et al., In Vitro/In Vivo Flow Char. of Glaucoma Drain. Impl., Dohney Eye Inst. pp. 894-904.

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