Document Detail


Effect of noise block using earplugs on propofol sedation requirement during extracorporeal shock wave lithotripsy.
MedLine Citation:
PMID:  21717887     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
OBJECTIVE: To determine effect of noise block using earplugs on reducing propofol infusion needed to maintain a constant bispectral index (BIS) values in patients undergoing extracorporeal shock wave lithotripsy (ESWL).
MATERIAL AND METHOD: Fifty-eight patients (18-65 years) with nephrolithiasis undergoing ESWL, having ASA physical status I or II and have normal hearing function tested by audiometry were enrolled in this randomized, double-blind, controlled trial. Patients were randomized and allocated into two groups: noise blocked group (earplugs inserted into both ears) and control group (earplugs not inserted). Sedation by target-controlled infusion was started with 1.2 mcg/mL of propofol and propofol target concentration was adjusted gradually by 0.2 mcg/ml every 5 minutes intraoperatively to achieve and maintain bispectral index (BIS) values within 75-80% until the procedure finished. Total amount of propofol (mg), BIS values (%), ambient noise level (dB) and patient satisfaction (1-5) were measured.
RESULTS: The amount of propofol infusion needed to maintain a constant BIS index value in patients undergoing ESWL in the noise blocked group was significantly lower than that in the control group (6.91 +/- 2.05 vs. 8.23 +/- 2.16 mg/kg/m2/hr, p = 0.021). Patient satisfaction was similar in both groups (4 [1] vs. 4 [1], p = 0.929).
CONCLUSION: Noise diminution in ambient operating room can reduce the amount of propofol needed to maintain light sedation during ESWL.
Authors:
Supaporn Tharahirunchot; Suwanna Tatiyapongpinij; Ketchada Uerpairojkit
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Medical Association of Thailand = Chotmaihet thangphaet     Volume:  94 Suppl 2     ISSN:  0125-2208     ISO Abbreviation:  J Med Assoc Thai     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-07-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7507216     Medline TA:  J Med Assoc Thai     Country:  Thailand    
Other Details:
Languages:  eng     Pagination:  S103-7     Citation Subset:  IM    
Affiliation:
Department of Anesthesiology, Rajavithi Hospital, College of Medicine, Rangsit University, Bangkok, Thailand. supabura@windowslive.com
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