Apparatus for indicating fluid pressure in a conduit

Details Apparatus for indicating fluid pressure in a conduit Apparatus for indicating fluid pressure in a conduit

1997-08-05

2000-01-04

McDermott, Corrine

Surgery

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

Treating material introduced into or removed from body...

604246, 6048901, A61M 3700

Patent

active

060104821

ABSTRACT:
An apparatus for visually indicating fluid flow through a fluid system or apparatus such as a medical infusion device. The apparatus comprises a pair of thin, indicia bearing films disposed in an overlaying relationship. These films are shifted relative to each other by movement of mechanical actuators which are deflected solely by the pressure of the fluid within the fluid conduits of the system of the apparatus. The two films are stacked in closed proximity and are preferably constructed from a substantially transparent flexible material such as mylar. One surface of the inferior film is printed with a plurality of integrated symbols depicting various fluid flow conditions. The superior film functions as a mask over the inferior film and is printed with a pattern of diagonally extending, alternating clear and opaque stripes. The print ratio of the superior film permits viewing at any one time of only one of the symbols printed on the inferior film.

REFERENCES:
patent: 4431425 (1984-02-01), Thompson et al.
patent: 4626243 (1986-12-01), Singh et al.
patent: 5039279 (1991-08-01), Netwick et al.
patent: 5267900 (1993-12-01), Dirr, Jr. et al.

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