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Utility of intra-operative capnogram to detect branch pulmonary artery obstruction following total correction of tetralogy of Fallot.

Authors
Type
Published Article
Journal
Annals of cardiac anaesthesia
0974-5181
Publication Date
Volume
14
Issue
1
Pages
45–47
Identifiers
DOI: 10.4103/0971-9784.74399
PMID: 21196674
Source
Medline

Abstract

Branch pulmonary artery obstruction is one of the prime reasons for re-operation in patients who have undergone repair for tetralogy of Fallot. Branch pulmonary artery obstruction may develop over a period of time due to dilation of right ventricular outflow tract or it may be caused by residual stenosis after inadequate repair. This may lead to differential lung perfusion causing morbidity. Intra-operative capnogram monitoring reveals ventilation-perfusion relationship. We report two cases where the capnogram helped the diagnosis and management of branch pulmonary artery obstruction. We found a redundant patch in the first and an extra length of the homograft in second case which led to the obstruction. However, but for the changes in the intraoperative capnogram, this condition may by far remain undiagnosed considering the fact that it does not produce hemodynamic changes but can lead to postoperative morbidity.

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