BLADDER-BASED CUFF FOR MEASURING PHYSIOLOGICAL PARAMETERS

摘要

A cuff (10) for measuring volume and change in volume of a body appendage includes a hollow, rigid tube (20) having an inner surface (20a); and a bladder (30) having an inner surface (30a) and an outer surface (30b), the ends (30c) of the bladder (30) being sealed to the ends (20b) of the tube (20) to create an enclosed internal volume (40a) between the inner surface (30a) of the bladder (30) and the inner surface (20a) of the tube (20) and an external volume (40b) defined by the outer surface (30b) of the bladder (30) and surrounded by the internal volume (40a), the bladder (30) having a normal, relaxed state, in which the internal volume (40a) is filled with a fluid and a retracted state in which the fluid is evacuated from the internal volume (40a).