Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt
Publié en ligne: 17 avr. 2021
Pages: 11 - 16
Reçu: 04 janv. 2021
© 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.Figure 2
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 subjectsFigure 4
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.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 |