Does the Transient Decrease in Mixed Venous Oxygen Saturation and Jugular Venous Hemoglobin Saturation During the Rewarming Phase in a Cardiopulmonary Bypass Merely Reflect a Recovery of the Metabolic Rate? A Case Report
Maintaining the balance between oxygen supply and demand during a cardiopulmonary bypass (CPB) is a key issue in the anesthetic management of cardiovascular surgery. Although many reports have described this balance at a constant, low body temperature, little is known about the balance during the cooling and the rewarming phase of CPB. Nakajima et al.  reported that jugular venous hemoglobin saturation (SjO2) decreased during the rewarming phase of CPB, and that rapid rewarming produced a pronounced decrease in SjO2. We analyzed retrospectively the intraoperative changes in SjO2, mixed venous oxygen saturation (SV̄O2), and oxygen consumption (V̇O2) in three patients who underwent reconstruction of the thoracic aorta, two of whom developed postoperative neurological deficits.
KeywordsCardiopulmonary Bypass Blood Lactate Concentration Cooling Phase Mixed Venous Oxygen Saturation Oxygen Debt
Unable to display preview. Download preview PDF.