Early detection of CO2 pneumothorax with continuous spirometry during laparoscopic fundoplication

In two patients, operated on because of gastroesophageal reflux, carbon dioxide pneumothorax developed during laparoscopic Nissen fundoplication. In both instances, decrease of lung compliance and a change of pressure-volume loop configuration, computed and illustrated with on-line spirometry, led quickly to diagnosis of this complication. We conclude that continuous spirometry is valuable as an early indicator of intraoperative pneumothorax.