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Lung function after deep hypothermic cardiopulmonary bypass in infants
Zhao Kang Su1, Yong Sun, Yan Min Yang
1Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Xinua Hospital, Shanghai Second Medical University, Shanghai 200127, People's Republic of China. scmcmud@online.sh.cn
Asian Cardiovascular & Thoracic Annals
|December 19, 2003
Summary
Deep hypothermia with low flow during congenital heart defect repair in infants caused greater pulmonary dysfunction and longer intensive care unit stays compared to circulatory arrest. This highlights potential risks of the low-flow technique.
Area of Science:
- Pediatric Cardiac Surgery
- Neonatal Intensive Care
- Pulmonary Physiology
Background:
- Concerns exist regarding neurologic injury from deep hypothermia with low flow in neonatal cardiac repair.
- Ventricular septal defect and pulmonary hypertension are complex congenital heart defects requiring surgical intervention.
Purpose of the Study:
- To compare pulmonary function after cardiac repair using deep hypothermia with circulatory arrest versus deep hypothermia with low flow in infants.
- To assess the impact of different hypothermic techniques on postoperative pulmonary outcomes.
Main Methods:
- Randomized trial involving 20 infants with ventricular septal defect and pulmonary hypertension.
- Measurement of static pulmonary compliance, airway resistance, and respiratory index.
- Assessments performed pre-cardiopulmonary bypass and at 5 minutes and 2 hours post-cessation.
Main Results:
- Both groups exhibited significant pulmonary dysfunction post-cardiopulmonary bypass.
- Greater impairment in pulmonary compliance and respiratory index was observed in the deep hypothermia with low flow group.
- The low-flow group experienced longer intensive care unit stays.
Conclusions:
- Deep hypothermia with low flow is associated with more significant pulmonary dysfunction in infants undergoing complex congenital heart defect repair.
- Circulatory arrest may offer a safer alternative regarding postoperative pulmonary function.
- Further research is warranted to optimize hypothermic strategies in pediatric cardiac surgery.