title: Changes in blood rheologic factors following coronary artery surgery.
abstract: Blood rheologic parameters were examined in 16 patients without multiple organ failure 2 weeks after coronary artery surgery. The whole blood viscosity (shear rate = 94.5 sec-1) was unchanged (4.59 +/- 0.53 to 4.56 +/- 0.58 mPa.s) despite a significant decrease in hematocrit (39.8 +/- 4.3 to 37.1 +/- 3.8%, P less than 0.05). The oxygen delivery index (the ratio of hematocrit to whole blood viscosity) was significantly decreased (8.67 +/- 0.35 to 8.18 +/- 0.59%/mPa.s, P less than 0.05). Plasma viscosity (shear rate = 94.5 sec-1) increased significantly (1.60 +/- 0.13 to 1.72 +/- 0.10 mPa.s, P less than 0.01), as did serum levels of globulin (2.8 +/- 0.4 to 3.0 +/- 0.4 g/dl, P less than 0.01), alpha 1-antitrypsin (232 +/- 41 to 308 +/- 60 mg/dl, P less than 0.001), and fibrinogen (381 +/- 81 to 479 +/- 117 mg/dl, P less than 0.001). Total protein and globulin levels showed a good correlation with plasma viscosity, but the fibrinogen concentration demonstrated no correlation. The passage time of a 40% red blood cell suspension (0.5 ml) was shortened significantly from 10.2 +/- 1.1 to 9.2 +/- 1.0 sec (P less than 0.05). These results indicate that an increase in plasma viscosity is important in determining blood rheologic properties 2 weeks after coronary artery surgery.
authors.affiliation: Department of Anesthesiology, Toyokawa City Hospital, Aichi, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kato
authors.forename: N
authors.initials: N
authors.lastname: Tsushima
mesh_terms: D000328:Adult; D000368:Aged; D001682:Biological Availability; D001798:Blood Proteins / Q000032:analysis; D001809:Blood Viscosity; D003326:Coronary Circulation; D003331:Coronary Vessels / Q000502:physiology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D011184:Postoperative Period; D012212:Rheology
chemical_list: D001798:Blood Proteins; D010100:Oxygen