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Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt

Leslie David Montgomery

Leslie David Montgomery

LDM AssociatesSan Jose, USA
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Montgomery, Leslie David
 et 
Clarence Oloff

Clarence Oloff

San Jose, USA
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Oloff, Clarence
  
17 avr. 2021
Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt's Cover Image
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Publié en ligne: 17 avr. 2021
Pages: 11 - 16
Reçu: 04 janv. 2021
DOI: https://doi.org/10.2478/joeb-2021-0003
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© 2021 Leslie David Montgomery, and Clarence Oloff, published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Graphical technique used to analyze the IPG waveform.
Graphical technique used to analyze the IPG waveform.

Figure 2

Impedance electrode locations on humans and Rhesus monkeys.
Impedance electrode locations on humans and Rhesus monkeys.

Figure 3

Human and Rhesus monkey % volume index change after 4 hr, −6 deg HDT. * Significantly different (P<0.05) than similar segment of human subjects
Human and Rhesus monkey % volume index change after 4 hr, −6 deg HDT. * Significantly different (P<0.05) than similar segment of human subjects

Figure 4

Calf Waveform parameters at 4 hr HDT. * Significantly different (P<0.05) than similar segment of human subjects.
Calf Waveform parameters at 4 hr HDT. * Significantly different (P<0.05) than similar segment of human subjects.

Figure 5

Forearm pulse waveform parameters at 4 hr HDT. No significant differences between Rhesus monkeys and humans.
Forearm pulse waveform parameters at 4 hr HDT. No significant differences between Rhesus monkeys and humans.

Percent calf and forearm pulse waveform parameter indices relative to control values after 4 hours of −6 degrees head down tilt_

GROUP TIME NUMBER RI-M RI-SE DCI-M DCI-SE DSI-M DSI-SE AI-M AI-SE
HUMAN-CALF 240 12 1.000 0.074 1.030 0.096 0.910 0.109 1.048 0.053
RHESUS-CALF 240 8 1.068 0.173 0.754 0.095 0.727 0.107 1.021 0.051
HUMAN-L.ARM 240 12 1.264 0.080 1.087 0.141 1.008 0.099 1.070 0.122
RHESUS-L.ARM 240 8 0.890 0.236 0.967 0.030 0.954 0.047 0.949 0.027

Percent segmental volumes relative to control values after 4 hours of −6 degrees head down tilt_

GROUP TIME NUMBER CAFM CAFSE THIM THISE PELM PELSE
HUMAN 240 12 0.947 0.011 0.976 0.008 1.031 0.037
RHESUS 240 8 0.931 0.037 0.965 0.034 0.997 0.027
Langue:
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Sujets de la revue:
Ingénierie, Génie biologique et génie biomédicale, Électronique biomédicale, Sciences de la vie, Biophysique, Médecine, Génie biomédical, Physique, Spectroscopie et métrologie
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