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Pulsatile normothermic cardiopulmonary bypass and plasma catecholamine levels
R Zamparelli1, S De Paulis, L Martinelli
1Department of Anaesthesiology and Intensive Care, Università Cattolica del Sacro Cuore, Rome, Italy.
Perfusion
|June 24, 2000
Summary
Pulsatile cardiopulmonary bypass (CPB) may reduce norepinephrine levels during heart surgery. However, this study found no significant clinical benefits from using pulsatile CPB in patients undergoing myocardial revascularization.
Area of Science:
- Cardiology
- Cardiovascular Surgery
- Physiology
Background:
- Myocardial revascularization is a critical cardiac surgery.
- Cardiopulmonary bypass (CPB) is essential for maintaining circulation during the procedure.
- The type of CPB (pulsatile vs. nonpulsatile) may influence physiological responses.
Purpose of the Study:
- To compare plasma catecholamine levels in patients undergoing myocardial revascularization using pulsatile (P) versus nonpulsatile (NP) normothermic cardiopulmonary bypass.
- To investigate the relationship between CPB type and hemodynamic parameters and clinical outcomes.
Main Methods:
- Twenty-eight patients were randomized into two groups: pulsatile CPB (n=15) and nonpulsatile CPB (n=13).
- Plasma epinephrine and norepinephrine levels were measured at seven time points during and after surgery.
- Hemodynamic assessments were conducted at four time points.
Main Results:
- Both groups showed marked increases in epinephrine levels during CPB.
- Norepinephrine levels increased significantly more in the nonpulsatile CPB group compared to the pulsatile group.
- No significant differences were observed in fluid administration, transfusion needs, drug usage, or postoperative complications between the groups.
Conclusions:
- Normothermic pulsatile CPB appears to result in lower norepinephrine levels compared to nonpulsatile CPB.
- The study did not demonstrate a clear clinical benefit associated with reduced norepinephrine levels during the observed postoperative period.