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Comparison of central venous to mixed venous oxygen saturation in patients with low cardiac index and filling pressures after coronary artery surgery. 2008

Alexandre Yazigi, and Claudine El Khoury, and Samia Jebara, and Fadia Haddad, and Gemma Hayeck, and Ghassan Sleilaty
Department of Anesthesia and Surgical Intensive Care, Hotel-Dieu de France Hospital, Saint Joseph University, Beirut, Lebanon. ritalama@idm.net.lb

OBJECTIVE To evaluate the correlation and agreement between mixed venous oxygen saturation (SvO(2)) and central venous oxygen saturation (ScvO(2)) in patients with low cardiac index and filling pressures after coronary artery surgery. METHODS Prospective observational study. METHODS Tertiary care academic hospital. METHODS Sixty consecutive patients with a cardiac index <2 L/min/m(2) and a pulmonary artery occlusion pressure <12 mmHg after coronary artery surgery were included. METHODS Patients were monitored by a pulmonary artery catheter and a central venous catheter positioned in the superior vena cava. RESULTS SvO(2) and ScvO(2) were simultaneously measured before (T0) and after (T1) normalization of the cardiac index (>2.5 L/min/m(2)) by fluid therapy. Sixty pairs of measures were obtained at T0 and at T1. Bias between SvO(2) and ScvO(2) was -0.6% (T0) and -0.8% (T1). Limits of agreement were from -19.2% to 18% (T0) and from -15.6% to 14% (T1), and the correlation coefficient was 0.463 (T0) and 0.72 (T1). SvO(2) and ScvO(2) changes from T0 to T1 (DeltaSvO(2) and DeltaScvO(2)) were calculated. The bias between DeltaSvO(2) and DeltaScvO(2) was -0.25. Limits of agreement were from -20% to 19.5%, and the correlation coefficient was 0.6. CONCLUSIONS In patients with low cardiac index and filling pressures after coronary artery surgery, ScvO(2) could not be used as a direct alternative for SvO(2). After fluid therapy and normalization of the cardiac index, differences between individual values remained large, and the disagreement between ScvO(2) and SvO(2) changes was significant.

UI MeSH Term Description Entries
D008297 Male Males
D010092 Oximetry The determination of oxygen-hemoglobin saturation of blood either by withdrawing a sample and passing it through a classical photoelectric oximeter or by electrodes attached to some translucent part of the body like finger, earlobe, or skin fold. It includes non-invasive oxygen monitoring by pulse oximetry. Pulse Oximetry,Oximetry, Pulse,Oximetries,Oximetries, Pulse,Pulse Oximetries
D010100 Oxygen An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. Dioxygen,Oxygen-16,Oxygen 16
D011446 Prospective Studies Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group. Prospective Study,Studies, Prospective,Study, Prospective
D011651 Pulmonary Artery The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs. Arteries, Pulmonary,Artery, Pulmonary,Pulmonary Arteries
D001794 Blood Pressure PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS. Systolic Pressure,Diastolic Pressure,Pulse Pressure,Pressure, Blood,Pressure, Diastolic,Pressure, Pulse,Pressure, Systolic,Pressures, Systolic
D002303 Cardiac Output, Low A state of subnormal or depressed cardiac output at rest or during stress. It is a characteristic of CARDIOVASCULAR DISEASES, including congenital, valvular, rheumatic, hypertensive, coronary, and cardiomyopathic. The serious form of low cardiac output is characterized by marked reduction in STROKE VOLUME, and systemic vasoconstriction resulting in cold, pale, and sometimes cyanotic extremities. Low Cardiac Output,Low Cardiac Output Syndrome,Output, Low Cardiac
D002405 Catheterization, Central Venous Placement of an intravenous CATHETER in the subclavian, jugular, or other central vein. Central Venous Catheterization,Venous Catheterization, Central,Catheterization, Central,Central Catheterization,Catheterizations, Central,Catheterizations, Central Venous,Central Catheterizations,Central Venous Catheterizations,Venous Catheterizations, Central
D002407 Catheterization, Swan-Ganz Placement of a balloon-tipped catheter into the pulmonary artery through the antecubital, subclavian, and sometimes the femoral vein. It is used to measure pulmonary artery pressure and pulmonary artery wedge pressure which reflects left atrial pressure and left ventricular end-diastolic pressure. The catheter is threaded into the right atrium, the balloon is inflated and the catheter follows the blood flow through the tricuspid valve into the right ventricle and out into the pulmonary artery. Catheterization, Pulmonary Artery,Swan-Ganz Catheterization,Pulmonary Artery Catheterization,Artery Catheterization, Pulmonary,Artery Catheterizations, Pulmonary,Catheterization, Swan Ganz,Catheterizations, Pulmonary Artery,Pulmonary Artery Catheterizations,Swan Ganz Catheterization
D005260 Female Females

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