Hand-held vital-signals monitor
Complete miniaturized physiological vital-signs monitor displays body temperature, heart rate, and breath rate, and has provision to display blood-pressure data fed from external circuitery.
Rinard, G. A.↗
Engineering topics
Steffen, D. A.
Publications and source records attributed to Steffen, D. A..
Hybrid temperature-monitoring circuit
Hybrid circuit developed for use in hand-held vital signs monitor converts resistance of thermistor probe to 3 1/2 digit BCD (binary-coded-decimal) temperature readout. If used alone circuit can form 'stand alone' temperature monitor or can transmit temperature data via telemetry to data acquisition systems.
Rinard, G. A.↗
Hybrid ECG signal conditioner
Circuit with high common-mode rejection has ability to filter and amplify accepted analog electrocardiogram (ECG) signals of varying amplitude, shape, and polarity. In addition, low power circuit develops standardized pulses that can be counted and averaged by heart/breath rate processor.
Rinard, G. A.↗
Hybrid respiration-signal conditioner
Hybrid impedance-pneumograph and respiration-rate signal conditioner element of hand-held vital signs monitor measures changes in impedance of chest during breathing cycle and generates analog respiration signal as output along with synchronous square wave that can be monitored by breath-rate processor.
Rinard, G. A.↗
Hybrid heart/breath-rate processor
Single hybrid circuit converts time between pulses from ECG signal conditioner of breath-rate signal conditioner to determine heart-rate of respiration-rate output of hand-held vital signs monitor.
Rinard, G. A.↗
Hybrid LCD driver
Display driver for hand-held signs monitor can be configured to operate either 4 digit or, by paralleling four drivers, to operate 16 digit liquid crystal display (LCD).
Rinard, G. A.↗
Hybrid clock generator
Clock driver hybrid for hand-held vital signs monitor generates all frequencies required for operation of vital signs system in compact low power configuration.
Rinard, G. A.↗