Erythrocyte sedimentation rate II. Effects of tilt angle in saline solution.
We have measured the sedimentation curves of swine erythrocytes in a physiological saline solution in inclined glass tubes. The curves are well fitted to the exponential type equation l = a[1 - exp(-bt)] for the tilt angle theta in the range of theta less than 80 degrees and hematocrits from 10 to 50%, where l and t are the medium length along the tube and the elapsed time from the sample injection, respectively. The coefficient a increases with theta and b is proportional to sin theta. The erythrocyte sedimentation rate ESR(theta) = (d l/dt)t----0 determined from the above empirical equation increases with the increase in sin theta roughly linearly. The experimental results are discussed with reference to the Ponder-Nakamura-Kuroda theory and some recent theories.
Dobashi
T
T
Department of Polymer Science, Faculty of Technology, Gunma University, Japan.
Goto
H
H
Sakanishi
A
A
Oka
S
S
D000818:Animals; D001799:Blood Sedimentation; D008955:Models, Cardiovascular; D012965:Sodium Chloride
D012965:Sodium Chloride