Acta anaesthesiologica Sinica
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Acta Anaesthesiol. Sin. · Sep 2002
Randomized Controlled Trial Clinical TrialCardiac output measurement during cardiac surgery: esophageal Doppler versus pulmonary artery catheter.
Bolus thermodilution cardiac output (BCO) measurement has been considered as the "gold standard" for cardiac output (CO) measurement. However, it requires placement of a pulmonary artery (PA) catheter, and questions have been raised regarding the risk/benefit ratio of this invasive technique. Furthermore, great variations between measurements have been reported. Continuous thermodilution CO (CCO) measurement is reported to be a better alternative, but it still requires the placement of a PA catheter. Esophageal echo-Doppler ultrasonography (ED) provides non-invasive continuous measurement of CO (ED-CO). This study was thus designed to compare the agreement between ED-CO and both thermodilution techniques (BCO and CCO). ⋯ Esophageal echo-Doppler ultrasonography is a satisfactory alternative for cardiac output measurement because it gives a value in good agreement with CCO measurement. With significant between-measurement variations, the accuracy and precision of BCO are uncertain, and it should not be considered as the "gold standard".
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Acta Anaesthesiol. Sin. · Sep 2002
Randomized Controlled Trial Comparative Study Clinical TrialThe macroscopic changes of tracheal mucosa following tight versus loose control of tracheal tube cuff pressure.
Tracheal mucosal lesions have been reported following intubation anesthesia. This has been mostly attributed to improper cuff pressure leading to ischemic damages of the tracheal mucosa. In this study macroscopic changes of tracheal mucosa at the site of cuff inflation were evaluated endoscopically after "tight method" of cuff pressure control using a special water manometer. ⋯ Tight control of cuff pressure can minimize the incidence and severity of macroscopic lesions of tracheal mucosa at the site of cuff inflation.