Document Detail

Use of active noise cancellation devices in caregivers in the intensive care unit.
MedLine Citation:
PMID:  10809298     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Recent development of noise cancellation devices may offer relief from noise in the intensive care unit environment. This study was conducted to evaluate the effect of noise cancellation devices on subjective hearing assessment by caregivers in the intensive care units. DESIGN: Randomized, double-blind. SETTING: Adult medical intensive care unit and pediatric intensive care unit of a teaching hospital. SUBJECTS: Caregivers of patients, including nurses, parents, respiratory therapists, and nursing assistants from a medical intensive care unit and pediatric intensive care, were enrolled in the study. INTERVENTION: Each participant was asked to wear the headphones, functional or nonfunctional noise cancellation devices, for a minimum of 30 mins. MEASUREMENTS: Subjective ambient noise level was assessed on a 10-point visual analog scale (VAS) before and during headphone use by each participant. Headphone comfort and the preference of the caregiver to wear the headphone were also evaluated on a 10-point VAS. Simultaneously, objective measurement of noise was done with a sound level meter using the decibel-A scale and at each of nine octave bands at each bedspace. RESULTS: The functional headphones significantly reduced the subjective assessment of noise by 2 (out of 10) VAS points (p < 0.05) in environments of equal objective noise profiles, based on decibel-A and octave band assessments. CONCLUSION: Noise cancellation devices improve subjective assessment of noise in caretakers. The benefit of these devices on hearing loss needs further evaluation in caregivers and critically ill patients.
S Akhtar; C G Weigle; E Y Cheng; R Toohill; R J Berens
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Critical care medicine     Volume:  28     ISSN:  0090-3493     ISO Abbreviation:  Crit. Care Med.     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-05-25     Completed Date:  2000-05-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0355501     Medline TA:  Crit Care Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1157-60     Citation Subset:  AIM; IM    
Department of Anesthesiology, Yale University School of Medicine, USA.
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MeSH Terms
Cross-Over Studies
Double-Blind Method
Ear Protective Devices* / statistics & numerical data
Equipment Design
Intensive Care*
Noise / prevention & control*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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