Adjustable-rate, constant output infusion set

Details Adjustable-rate, constant output infusion set Adjustable-rate, constant output infusion set

1980-06-05

1982-08-10

Pellegrino, Stephen C.

Surgery

Respiratory method or device

Ozone or ion generation

128214C, 137501, A61M 500

Patent

active

043433057

ABSTRACT:
There is provided an adjustable-rate, constant output infusion set connectable in-line in an intravascular infusion system. The infusion set comprises a connector piece connectable to a container for the infusion liquid and a head piece rotatably attached to the connector piece and connectable at its lower end to a tube leading to the infusion recipient. An elastically stretchable diaphragm is interposed between the connector piece and the head piece. The connector piece forms with the diaphragm a first chamber in direct communication with the container via an inlet port, and the head piece forms with the diaphragm a second chamber in direct communication with the recipient via a control port. The head piece is rotatably attachable to the connector piece for adjusting the flow rate therethrough. The set further comprises an annular member interposed between the connector piece and the head piece, and a passageway which connects the first chamber and the second chamber. The diaphragm by virtue of its elasticity maintains a constant pressure drop between the chambers, so that liquid passes the control port at a constant rate of flow, in spite of variations of liquid pressure in the ports.

REFERENCES:
patent: 172163 (1876-01-01), Peebles
patent: 611519 (1898-09-01), Simmance
patent: 2219408 (1940-10-01), Benz et al.
patent: 3357448 (1967-12-01), Martin
patent: 3812876 (1974-05-01), Krieter
patent: 3886968 (1975-06-01), Murrell
patent: 4043332 (1977-08-01), Metcalf
patent: 4078563 (1978-03-01), Tuseth
patent: 4142523 (1979-03-01), Stegeman
patent: 4142524 (1979-03-01), Jassauaua et al.

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