Open AccessEffect of thoracic epidural anesthesia on oxygen delivery and utilization in cardiac surgical patients scheduled to undergo off-pump coronary artery bypass surgery: A prospective study
Author(s) -
Sharadaprasad Suryaprakash,
Murali Chakravarthy,
Mamatha Gautam,
Anurag Gandhi,
Vivek Jawali,
TA Patil,
Jayaprakash Krishnamoorthy,
Saurabh Pandey,
Geetha Muniraju
Publication year - 2011
Publication title -
annals of cardiac anaesthesia/annals of cardiac anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 27
eISSN - 0974-5181
pISSN - 0971-9784
DOI - 10.4103/0971-9784.83997
Subject(s) - medicine , anesthesia , cardiac index , oxygenation , prospective cohort study , cardiothoracic surgery , hemodynamics , catheter , cardiac surgery , coronary artery bypass surgery , artery , anesthesiology , surgery , cardiac output
To evaluate the effect of thoracic epidural anesthesia (TEA) on tissue oxygen delivery and utilization in patients undergoing cardiac surgery. This prospective observational study was conducted in a tertiary referral heart hospital. A total of 25 patients undergoing elective off-pump coronary artery bypass surgery were enrolled in this study. All patients received thoracic epidural catheter in the most prominent inter-vertebral space between C7 and T3 on the day before operation. On the day of surgery, an arterial catheter and Swan Ganz catheter (capable of measuring cardiac index) was inserted. After administering full dose of local anesthetic in the epidural space, serial hemodynamic and oxygen transport parameters were measured for 30 minute prior to administration of general anesthesia, with which the study was culminated. A significant decrease in oxygen delivery index with insignificant changes in oxygen extraction and consumption indices was observed. We conclude that TEA does not affect tissue oxygenation despite a decrease in arterial pressures and cardiac output.