US 4,068,654 A · Blood pressure measuring apparatus and method

Abstract

An instrument for measuring blood pressure by sensing the Korotkoff sounds which prevail only between the systolic and the diastolic points. The instrument used is essentially a hand held device which is held in direct contact with the skin over an artery. The instrument has a pressure-sensitive element which responds to pressure, and a crystal transducer which responds to Korotkoff sounds. A pressure is exerted on the instrument occluding the artery and stopping the Korotkoff sounds, and, as the pressure is reduced and the Korotkoff sounds commence, the crystal transducer senses the vibrations from the artery which vibrations are Korotkoff sounds. The crystal triggers a memory circuit, the contents of which are shown on the digital display. The digital display shows the pressure sensed by the strain gauge at the time the sounds appear at the systolic point and again at the diastolic point.

Claims5

Dependent claims

An instrument for evaluating the circulatory system of an animal by sensing externally applied pressure and by sensing Korotkoff sounds at the systolic and diastolic points comprising,

a body having finger-engaging means thereon,
a detector head supported on said body,
said detector head having skin-engaging means thereon,
a pressure pickup means and a sound-pickup means connected to said skin-engaging means,
a first circuit,
and a second circuit,
said first circuit comprising,
said pressure pickup means and,
a memory means connected to said pressure pickup means,
and a digital numeric display means connected to said memory means,
said second circuit comprising,
said sound pickup means,
means connecting said sound pickup means to said memory means for triggering said memory means to actuate said numeric display means whereby said numeric display means indicates proportional to the pressure exerted on said pressure pickup means at the occurance of each said sound by said pickup.

10 more elements

Dependencies are inferred from the claim text.

Blood pressure measuring apparatus and method

Life of this patent

Blood pressure measuring apparatus and method

Life of this patent

Abstract

Claims5