title: Erythrocyte sedimentation rate II. Effects of tilt angle in saline solution.
abstract: 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.
authors.affiliation: Department of Polymer Science, Faculty of Technology, Gunma University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Dobashi
authors.forename: H
authors.initials: H
authors.lastname: Goto
authors.forename: A
authors.initials: A
authors.lastname: Sakanishi
authors.forename: S
authors.initials: S
authors.lastname: Oka
mesh_terms: D000818:Animals; D001799:Blood Sedimentation; D008955:Models, Cardiovascular; D012965:Sodium Chloride
chemical_list: D012965:Sodium Chloride