Respiratory flow sensor

Details Respiratory flow sensor Respiratory flow sensor

1997-01-31

1998-06-09

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Using differential pressure

128725, G01F 136

Patent

active

057637920

ABSTRACT:
A respiratory flow sensor to be connected between a breathing tube and an endotracheal catheter, which has a flow channel, an orifice, which is formed by a foil recessed in the flow tube, in which an orifice flap is formed by an incision, and has connections to the flow channel on both sides of the orifice to pick up the pressure difference generated over the orifice. The respiratory flow sensor is reusable and makes possible accurate measurement even at low flow rates and low pneumatic resistance. The foil is a metal foil, which is interrupted by a central incision in the area carrying the orifice flap to form two hinge elements which are narrow compared with the width of the orifice flap. A first flow rectifier is arranged in the flow channel between the orifice flap and the connection for the endotracheal catheter.

REFERENCES:
patent: 3840051 (1974-10-01), Akashi et al.
patent: 3962917 (1976-06-01), Terada
patent: 4083245 (1978-04-01), Osborn
patent: 4993269 (1991-02-01), Guillaume et al.
patent: 5060655 (1991-10-01), Rudolph

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