Development of a Korotkov sound processor for automatic identification of auscultatory events. II - Decision logic specifications and operational verification
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Wolthuis, R. A.↗
Engineering topics
Hoffler, G. W.
Publications and source records attributed to Hoffler, G. W..
Lower body negative pressure, experiment M092
Evaluation of orthostatic intolerance has been achieved by the use of lower body negative pressure (LBNP). The LBNP technique, though independent of gravity, simulates its effect by exposing the legs and the lower abdomen to reduced ambient pressures. This LBNP experiment, conducted during the 56-day simulation of the Skylab environment, was designed to supply baseline information on cardiovascular responses to periodic orthostatic stress. Impaired orthostatic tolerance, manifested by the increased heart rate, diminished systolic and pulse pressure, and increased tendency to syncope in the upright position, or during LBNP, was not observed in this experiment.
Johnson, R. L.↗
Automated analysis of blood pressure measurements (Korotkov sound)
Automatic system for noninvasive measurements of arterial blood pressure is described. System uses Korotkov sound processor logic ratios to identify Korotkov sounds. Schematic diagram of system is provided to show components and method of operation.
Golden, D. P.↗
Improved waist seal design for use with lower body negative pressure, LBNP, devices
Waist seal design providing discrete anatomical placement, subject comfort, ingress/egress ease and size accommodation for lower body negative pressure devices
Baker, J. T.↗
Lower body negative pressure as an assay technique for orthostatic tolerance. III - A comparison of the individual response to incremental leg negative pressure vs incremental lower body negative pressure
Human orthostatic tolerance measurement via leg and lower body negative pressure, discussing heart rate and stroke volume variations
Hoffler, G. W.↗
Real-time contourogram as an ECG monitoring technique
Real time contourogram for monitoring ECG waveform data, describing cardiac measurement and data display
Golden, D. P.↗
Lower body negative pressure as an assay technique for orthostatic tolerance. II - A comparison of the individual response to incremental vs. constant levels of LBNP
Incremental lower body negative pressure as assay method for human orthostatic tolerance
Hoffler, G. W.↗
Lower body negative pressure as an assay technique for orthostatic tolerance. I
Human physiological responses to lower body negative pressure /LBNP/, studying presence or absence of change for orthostatic tolerance as function of time
Hoffler, G. W.↗