Video-assisted thoracoscopic surgery (VATS) has become a standard technique for addressing all types of thoracic pathology. Insufflation of carbon dioxide (CO2) into the operated chest cavity could increase lung collapse and improve surgical field view. The actual thoracic pressure values may not be identical with the presetting on the insufflator display. This overshoot pressure during VATS may compromise cardiac and pulmonary function. The purpose of this study is to evaluate the effects of intrathoracic pressure overshoot during two-lung ventilation on the hemodynamic and respiratory function and clarify the relative safety of two different techniques of insufflation.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Enrollment
232
After patients were positioned, CO2 was insufflated into right pleural cavity at eight or twenty L/min. during video-assisted thoracoscopic surgery, thoracic pressure, hemodynamic and respiratory parameters were recorded.
thoracic pressure overshoot
Time and value of thoracic pressure overshoot during CO2 insufflation
Time frame: one hour during CO2 insufflation
Hemodynamic change
Hemodynamic changes during each overshoot including Systolic Blood Pressure, Central Venous Pressure and Heart Rate
Time frame: one hour during CO2 insufflation
Respiratory change
Respiratory changes during each overshoot including Peak Inspiratory Pressure, Pressure flat, Arterial Oxygen Saturation and End-tidal Carbon dioxide
Time frame: one hour during CO2 insufflation
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