Echocardiographic Evaluation of the Change on Pulmonary Blood Flow and Cardiac Function Induced by Capnothorax During One Lung Ventilation

Echocardiographic Evaluation of the Change on Pulmonary Blood Flow and Cardiac Function Induced by Capnothorax During One Lung Ventilation

Video-assisted thoracoscopic extended thymectomy (VATET) is a minimally-invasive method for excision of mediastinal mass instead of open thymectomy. The iatrogenic capnothorax with one-lung ventilation during VATET may cause hemodynamic instability due to the compression of intrathoracic structures. The purpose of this study is to evaluate the effects of capnothorax on the pulmonary blood flow and cardiac function during the VATET by using the transesophageal echocardiography.

Video-assisted thoracoscopic extended thymectomy (VATET) is a minimally-invasive method for excision of mediastinal mass instead of open thymectomy. The iatrogenic capnothorax with one-lung ventilation during VATET may cause hemodynamic instability due to the compression of intrathoracic structures. The purpose of this study is to evaluate the effects of capnothorax on the pulmonary blood flow and cardiac function during the VATET by using the transesophageal echocardiography

Inclusion Criteria:

1. Above 20 years of age.
2. American Society of Anesthesiologists (ASA) Physical Status I, II, III.
3. Thoracic surgical procedure (video-assisted thoracoscopic extended thymectomy )

Exclusion Criteria:

1. Severe functional liver or kidney disease
2. Diagnosed HF ( NYHA class >3)
3. Arrhythmia or received treatment with antiarrhythmic drug .
4. Exceed BMI > 30 kg/ m2
5. COPD
6. Pathologic esophageal lesion (esophageal stricture or varix )
7. Pregnancy