Overpressure device

Details Overpressure device Overpressure device

A - Human Necessities

61

M

340/140.1

A61M 5/00 (2006.01) A61M 5/168 (2006.01)

Patent

CA 1129035

Abstract of the Disclosure An overpressure device is disclosed for use in a liquid infusion set for the purpose of detecting excessive pressures which may occur during infusion. The device comprises a tubular member with an inlet and an outlet, a closed pressure chamber and a bridging portion containing a small bore passage which connects the pressure chamber with the tubular member. In a preferred form, the interconnecting passage takes a tortuous path. An optical sensor positioned on the pressure chamber will detect the presence of liquid at a predetermined position in the chamber, when the liquid rises as a result of excessive pressure in the set, and respond by stopping the flow of liquid in the set.

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