Titrated sedation with propofol for medical thoracoscopy: A feasibility and safety study

Abstract

Background: Bispectral index (BIS) is a valuable tool for assessing the depth of sedation and guiding the administration of sedative drugs. We previously demonstrated the benefits of BIS-guided propofol sedation in patients undergoing flexible bronchoscopy. Objective: To examine the feasibility and safety profile of propofol sedation in patients undergoing medical thoracoscopy (MT). Methods: Patients undergoing MT for diagnostic evaluation or treatment of pleuropulmonary diseases were enrolled over a 2-year period. Nurses and chest physicians were trained by anesthetists to provide analgosedation, to detect and correct cardiopulmonary disturbances. The level of sedation was optimized individually by titrating the propofol infusion according to the BIS and clinical evaluation. Patients' clinical data, procedure time, medications and any adverse events were recorded. Results: Fifty-three patients (60% male) with a median age of 62 years (range 19-84 years) underwent MT. The operative procedure lasted a median time of 28 min (range 9-112 min). The median doses of anesthetic drugs were 145 mg of propofol (range 20-410 mg) and 84 μg of fentanyl (range 0-225 μg). Hemodynamic disturbances occurred in 39 patients (bradycardia n = 4, tachycardia n = 12, hypotension n = 34) and required drug administration in only 4 cases. Hypoxemic events (n = 4) resolved upon gentle patient stimulation (verbal command, chin lift, oral cannula). All patients could be discharged from the recovery unit within 105 min after the procedure. Conclusions: BIS-guided propofol sedation is a safe method that might replace midazolam sedation in MT and can be managed by well-trained nonanesthesiologist personnel. Copyright © 2011 S. Karger AG, Basel.