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Sturm, R. E.

Publications and source records attributed to Sturm, R. E..

14 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1979

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.↗
NASA NTRS1979

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.↗
NASA NTRS1979

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.↗
NASA NTRS1979

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.↗
NASA NTRS1979

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.↗
NASA NTRS1979

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.↗
NASA NTRS1979

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.↗
NASA NTRS1975

Quantitative three-dimensional dynamic imaging of structure and function of the cardiopulmonary and circulatory systems in all regions of the body

The background for, and design of a third generation, general purpose, all electronic spatial scanning system, the DSR is described. Its specified performance capabilities provide dynamic and stop action three dimensional spatial reconstructions of any portion of the body based on a minimum exposure time of 0.01 second for each 28 multiplanar 180 deg scanning set, a maximum scan repetition rate of sixty 28 multiplane scan sets per second, each scan set consisting of a maximum of 240 parallel cross sections of a minimum thickness of 0.9 mm, and encompassing a maximum cylindrical volume about 23 cm in length and up to 38 cm in diameter.

Sturm, R. E.↗
NASA NTRS1973

Biplane roentgen videometric system for dynamic, 60/sec, studies of the shape and size of circulatory structures, particularly the left ventricle.

An operator interactive video system for the measurement of roentgen angiographically outlined structures is described. Left ventricular volume and three-dimensional shapes are calculated from up to 200 pairs of diameters measured from ventriculograms at the rate of 60 pairs of biplane images per second. The accuracy and reproducibility of volumes calculated by the system were established by analysis of roentgenograms of inanimate objects of known volume and by comparison of left ventricular stroke volumes calculated by the system with the stroke volumes calculated by an indicator-dilution technique and an aortic root electromagnetic flowmeter. Computer-generated display of the large amounts of data obtained by the videometry system is described.

Ritman, E. L.↗
NASA NTRS1971

Effect of varying ventricular function by extrasystolic potentiation on closure of the mitral valve.

Mitral regurgitant indexes were measured by roentgen videodensitometry in anesthetized dogs without thoracotomy before, during and after extrasystolic potentiation of ventricular contraction while the atria and ventricles were driven in normal temporal sequence simultaneously or in such a way as to induce atrial fibrillation. Small amounts of mitral reflux were observed with simultaneous atrial and ventricular driving and with atrial fibrillation in the control measurements before initiation of extrasystolic potentiation. Reflux became negligible during extrasystolic potentiation and increased beyond control levels after termination of extrasystolic potentiation.

Vandenberg, R. A.↗
NASA NTRS1968

Biplane videoangiography.

Description of biplane videoangiographic system for dynamic measurement of left ventricle shape and volume

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