THE EFFECT OF SPINAL ANESTHESIA ON CARDIAC OUTPUT IN GERIATRIC PATIENTS

摘要

Introduction: In the elder population, anesthesia related morbidity and mortality rates are higher compared to young adults. In the present study, threfrequency of hypotension and changes in cardiac output related to spinal anesthesia among the geriatric patients were aimed to be investigated. Materials and Method: The patients were divided into two groups: group 1 included patients between 65- 79 years of age, group 2 included patients 80 years and older. Systolic blood pressures, diastolic blood pressures and mean blood pressures of the patients were calculated. Heart rates, peripheral oxygen saturation, cardiac output and stroke volumes were determined. Cardiac output and stroke volumes were measured by echocardiography. Five hundred ml colloid fluid was given to all patients in the preoperative period. Following the infusion, systolic blood pressures, diastolic blood pressures, mean blood pressures, heart rates, peripheral oxygen saturation, cardiac output and stroke volume values of the patients were recorded just before patients underwent spinal anesthesia, and at 5, 10, 15 and 20 minutes following spinal anesthesia. Results: There were no differences between the two groups regarding the demographic data. In group 2, the values of Systolic blood pressures, diastolic blood pressures and mean blood pressures were detected to be significantly lower at the 5th minute after spinal anesthesia. There were no differences between the two groups in cardiac output and stroke volume parameters. Conclusion: We found that hypotension was more frequent in patients over the age of 80 than the patients between 65-79. The occurrence of hypotension in over the age of 80 was associated with the decrease in systemic vascular resistance rather than the decrease in cardiac output