Blood solubilities of volatile anesthetics in cardiac patients

Objective: To determine and compare the effects of hematocrit and serum con stituents on the blood solubilities of volatile anesthetics in different ca rdiac surgical patients. Design: Descriptive Setting: University hospital. Participants: Twenty healthy adult volunteers, 40 adult cardiac patients, a nd 20 pediatric cardiac patients. Measurements and Main Results: Blood/gas partition coefficients of desflura ne, isoflurane, and halothane; hematocrit; and serum concentrations of chol esterol, triglyceride, albumin, and globulin were determined in healthy adu lt volunteers, adult patients with coronary artery disease or rheumatic hea rt disease, and pediatric patients with cyanotic or acyanotic congenital he art disease. Statistical analysis was used to determine the difference in s erum constituents and blood solubility of each anesthetic among volunteers and patients with different cardiac diseases. Triglyceride and blood/gas pa rtition coefficients of the 3 volatile anesthetics in the patients with cor onary artery disease were significantly higher than those in healthy volunt eers and the patients with rheumatic heart disease (p < 0.05). Hematocrits were significantly higher in cyanotic children than acyanotic children (p < 0.05), but the serum constituents and anesthetic solubilities were not dif ferent between the 2 groups (p > 0.05). Conclusion: Patients with coronary artery disease have significantly higher serum triglyceride and blood/gas partition coefficients for desflurane, is oflurane, and halothane than healthy volunteers and patients with rheumatic heart disease. Although cyanotic children have higher hematocrits compared with acyanotic children, no significant difference in anesthetic blood gas solubilities was found between the 2 groups. Copyright (C) 2001 by WB. Sau nders Company.