Analysis of rabbit intervertebral disc physiology based on water metabolism. II. Changes in normal intervertebral discs under axial vibratory load

Metabolic changes induced by axial vibratory load to the spine were investigated based on water metabolism in normal intervertebral discs of rabbits with or without pentobarbital anesthesia. Tritiated water concentration in the intervertebral discs of unanesthetized rabbits was reduced remarkably by...

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Bibliographic Details
Published in:Spine (Philadelphia, Pa. 1976) Pa. 1976), 1988-11, Vol.13 (11), p.1297-1302
Main Authors: Hirano, N, Tsuji, H, Ohshima, H, Kitano, S, Itoh, T, Sano, A
Format: Article
Language:English
Subjects:
Animals
Body Water - metabolism
Computer Simulation
Intervertebral Disc - blood supply
Intervertebral Disc - metabolism
Male
Rabbits
Regional Blood Flow
Space life sciences
Stress, Mechanical
Stress, Psychological - metabolism
Tritium
Vibration - adverse effects
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Summary:Metabolic changes induced by axial vibratory load to the spine were investigated based on water metabolism in normal intervertebral discs of rabbits with or without pentobarbital anesthesia. Tritiated water concentration in the intervertebral discs of unanesthetized rabbits was reduced remarkably by axial vibration for 30 minutes using the vibration machine developed for this study. Repeated vibratory load for 18 and 42 hours duration showed the recovery of 3H2O concentration of the intervertebral disc without anesthesia. Computer simulation suggested a reduction of blood flow surrounding the intervertebral disc following the vibration stress. However, no reduction of the 3H2O concentration in the intervertebral disc was noted under anesthesia. Emotional stress cannot be excluded as a factor in water metabolism in the intervertebral disc.
ISSN:0362-2436
DOI:10.1097/00007632-198811000-00016