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PLoS By Category | Recent PLoS Articles
Anesthesiology and Pain Management - Respiratory Medicine

Feasibility of Bispectral Index-Guided Propofol Infusion for Flexible Bronchoscopy Sedation: A Randomized Controlled Trial
Published: Wednesday, November 23, 2011
Author: Yu-Lun Lo et al.

by Yu-Lun Lo, Ting-Yu Lin, Yueh-Fu Fang, Tsai-Yu Wang, Hao-Cheng Chen, Chun-Liang Chou, Fu-Tsai Chung, Chih-Hsi Kuo, Po-Hao Feng, Chien-Ying Liu, Han-Pin Kuo

Objectives

There are safety issues associated with propofol use for flexible bronchoscopy (FB). The bispectral index (BIS) correlates well with the level of consciousness. The aim of this study was to show that BIS-guided propofol infusion is safe and may provide better sedation, benefiting the patients and bronchoscopists.

Methods

After administering alfentanil bolus, 500 patients were randomized to either propofol infusion titrated to a BIS level of 65-75 (study group) or incremental midazolam bolus based on clinical judgment to achieve moderate sedation. The primary endpoint was safety, while the secondary endpoints were recovery time, patient tolerance, and cooperation.

Results

The proportion of patients with hypoxemia or hypotensive events were not different in the 2 groups (study vs. control groups: 39.9% vs. 35.7%, p?=?0.340; 7.4% vs. 4.4%, p?=?0.159, respectively). The mean lowest blood pressure was lower in the study group. Logistic regression revealed male gender, higher American Society of Anesthesiologists physical status, and electrocautery were associated with hypoxemia, whereas lower propofol dose for induction was associated with hypotension in the study group. The study group had better global tolerance (p<0.001), less procedural interference by movement or cough (13.6% vs. 36.1%, p<0.001; 30.0% vs. 44.2%, p?=?0.001, respectively), and shorter time to orientation and ambulation (11.7±10.2 min vs. 29.7±26.8 min, p<0.001; 30.0±18.2 min vs. 55.7±40.6 min, p<0.001, respectively) compared to the control group.

Conclusions

BIS-guided propofol infusion combined with alfentanil for FB sedation provides excellent patient tolerance, with fast recovery and less procedure interference.

Trial Registration

ClinicalTrials. gov NCT00789815

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