Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-06-20
1996-05-07
Maglione, Corrine M.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
137517, 604256, 604246, 604249, A61M 500
Patent
active
055141102
ABSTRACT:
An intravenous fluid flow control device includes a rigid casing having a fluid entrance and a fluid exit. A portion of the casing has a flow restrictor. A pin is disposed inside the casing and axially movable within the flow restrictor. The pin has an interior passageway and at least one upstream opening for a fluid to pass from the casing fluid entrance to the interior passageway of the pin. The upstream opening is elongated in a direction parallel to a pin longitudinal axis, the pin elongated opening being axially movable within the flow restrictor to variably restrict a flow of the fluid passing through the interior passageway of the pin. The pin has a downstream opening for fluid to pass from the interior passageway of the pin to exit the device. Biasing structure (preferably a spring) biases the pin against a fluid pressure of the fluid entering from the casing fluid entrance to cause the pin elongated opening to move with respect to the fluid restrictor. As the incoming fluid pressure increases to a predetermined value, the fluid flow through the elongated opening also increases. As the fluid pressure further increases above the predetermined value, the elongated opening moves within the fluid restrictor to cause the fluid flow through the elongated opening to decrease.
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Gring N. Kent
Maglione Corrine M.
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