Surgery – Truss – Pad
Patent
1979-08-27
1981-07-07
Kamm, William E.
Surgery
Truss
Pad
128900, A61B 504
Patent
active
042768861
ABSTRACT:
Apparatus for measuring and recording a patient's blood pressure at various times throughout the day while the patient is unattended, wherein the apparatus includes a circular disk chart and a marking pen having a tip adjacent but normally spaced from one face of the disk. The marking pen is pivotally mounted for movement across the face of the disk in a radial direction and the marking pen is moved in the radial direction when a pressure cuff is inflated on a limb, such as an arm, of the patient. A diaphragm assembly coupled to the cuff is mechanically connected to the marking pen to cause it to pivot in one direction as the cuff is inflated. A microphone carried by the cuff detects Karotkoff sounds as the cuff is deflated. The pulses sensed by the microphone are amplified and used to actuate a driver which energizes a solenoid to attract the marking pen, causing the marking pen to be momentarily moved into engagement with the chart to form dots therein corresponding to the Karotkoff sounds between the systolic and diastolic pressures. A switch responsive to the pivotal movement of the marking pen enables the amplifier and solenoid driver when the cuff is inflated.
REFERENCES:
patent: 1906806 (1933-05-01), Plesch
patent: 2186517 (1940-01-01), Bradford
patent: 2447018 (1948-08-01), Keinath
patent: 3754545 (1973-08-01), Weinstein
Kamm William E.
McGannon John L.
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