Rheologic changes in venous blood during prolonged sitting.
We examined blood rheologic changes, mainly blood viscosity, during long-term quiet sitting. Samples of blood were obtained from the arm and foot veins of the healthy adult male volunteers before and after 2 h of quiet sitting. Blood viscosity, was immediately determined with an oscillation viscometer, and blood count and blood chemistry were analyzed. We found that the viscosity in blood from a foot vein but not from an arm vein increased significantly after 2 h of sitting. Our results show that 2 h of quiet sitting can increase thrombotic tendency locally in the leg but not systemically and suggests the importance of measuring focal venous blood viscosity.
Hitosugi
M
M
Department of Forensic Medicine, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Tokyo 105-8461, Minato-ku, Japan. hitosugi@jikei.ac.jp
Niwa
M
M
Takatsu
A
A
D000328:Adult; D001809:Blood Viscosity; D006801:Humans; D008297:Male; D011187:Posture; D012307:Risk Factors; D013997:Time Factors; D014680:Veins; D020246:Venous Thrombosis / Q000209:etiology*