Gasdurchflussventil und Sphygmomanometer unter Anwendung eines Luftspeise-/Ablassgerätes.

摘要

The gas flow valve enables constant venting and is used with a cuff (3) showing a rapid decrease in venting ability at a predetermined value on a boundary within the pressure range which allows measurement of blood pressure. The gas flow valve has a body (1) made of an elastic material and comprising a wedge-shaped portion formed integrally with a mounting base (1a) so as to have a flat portion with upper and lower surfaces (1b) serving as pressure-responsive surfaces, a linear opening formed at the tip of the wedge-shaped portion, and a passageway (1c) communicating with the opening (1d) and extending in the longitudinal direction within the mounting base and the tip portion. A thin sheet-like member (2) is twisted and disposed in the passageway so that the tip portion (2b) is held by the opening (1d). As a result, the elastic deformation of the gas passageway formed by the gaps in the opening during pressure reduction is promoted by the resiliency of the torsion of the thin sheet-like member. A sphygmomanometer air-feeding/discharging apparatus with the gas flow valve has flexibility for cuffs having various shapes and specifications and enables easy adjustment of the orifice area.