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Reperfusion injury and exhaled hydrogen peroxide
W C Wilson1, P R Laborde, J L Benumof
1Department of Anesthesiology, University of California at San Diego Medical Center 92103-8770.
Anesthesia and Analgesia
|November 1, 1993
Summary
Exhaled hydrogen peroxide (H2O2) was measured in reperfusion lung injury models. Only patients undergoing pulmonary thromboendarterectomy showed increased H2O2, but without correlation to lung injury indicators.
Area of Science:
- Biomedical Science
- Pulmonary Medicine
- Oxidative Stress Research
Background:
- Reactive oxygen species contribute to lung injury during ischemia-reperfusion.
- Measuring exhaled hydrogen peroxide (H2O2) may indicate lung injury.
Purpose of the Study:
- To measure exhaled H2O2 in various human and canine models of reperfusion lung injury.
- To assess the correlation between exhaled H2O2 and lung injury severity.
Main Methods:
- Exhaled H2O2 was collected using a cold glass coil and analyzed spectrophotometrically.
- Studies included cardiopulmonary bypass, pulmonary thromboendarterectomy, lung transplant, and peripheral ischemia models.
- Positive controls included HCl-induced canine lung injury and adult respiratory distress syndrome (ARDS).
Main Results:
- Groups 1 (CPB), 3 (lung transplant), and 4 (peripheral ischemia) showed no significant increase in exhaled H2O2.
- Group 2 (pulmonary thromboendarterectomy) exhibited significantly elevated H2O2 on postoperative Day 2 (P=0.028).
- No correlation was found between H2O2 levels and physiological indicators of lung injury in Group 2.
Conclusions:
- Exhaled H2O2 is not a reliable universal biomarker for reperfusion lung injury across all models.
- Elevated H2O2 in pulmonary thromboendarterectomy patients warrants further investigation.
- The role of oxidative stress in specific reperfusion scenarios requires nuanced understanding.