Influence of Fasting Duration on Stroke Volume Variation in Patients Undergoing Pulmonary Lobectomy -Morning and Afternoon Cases-

Abstract

  We studied the influence of fasting duration on stroke volume variation (SVV) in patients undergoing pulmonary lobectomy. We enrolled 20 patients. Patients were divided into two groups: patients who underwent surgery in the morning (group A) and patients who underwent it in the afternoon (group B). The difference in fasting duration was 4 hours. We measured cardiac output (CO), cardiac index (CI) and SVV with FloTrac^TM. We also measured blood pressure (BP), heart rate (HR) and central venous pressure (CVP). There were no significant differences between the two groups in BP, HR, CVP, CO, CI, systemic vascular resistance (SVR) and SVV. But SVV was elevated in both groups (group A; 15.4±6.5%, group B; 18.5±6.9%), indicating hypovolemia. Preoperative fasting for 10 and 14 hours in both groups elevated SVV, but the additional 4-hour difference in the fasting duration didn't cause a further change in the SVV.