Fluid administration apparatus

Details Fluid administration apparatus Fluid administration apparatus

1996-11-22

1998-07-14

Brown, Michael A.

Surgery

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

Treating material introduced into or removed from body...

128DIG12, 604143, A61M 3700

Patent

active

057796785

ABSTRACT:
PCA apparatus has a container with a movable piston dividing the container into a lower chamber for medication liquid and an upper, air-filled chamber. A manually-actuated air pump is connected to the upper chamber so that air can be supplied to the upper chamber to displace the piston and discharge the liquid through a catheter. The air pump has a cylinder containing a plunger with a capillary inlet, to limit the rate at which air can flow into the cylinder and hence be pumped to the upper chamber. The lower chamber is filled through a removable inlet spike connector by pulling up the piston with an actuating rod projecting from the upper end of the container. The rod is frangible so that it can be removed after filling the lower chamber.

REFERENCES:
patent: 3889677 (1975-06-01), Nehring
patent: 4085749 (1978-04-01), Chambron
patent: 4351335 (1982-09-01), Whitney et al.
patent: 4505701 (1985-03-01), Navato
patent: 5024656 (1991-06-01), Gasaway et al.
patent: 5059182 (1991-10-01), Laing
patent: 5098418 (1992-03-01), Maitz et al.
patent: 5312389 (1994-05-01), Theeuwes et al.

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