Background
Exposure to noise levels greater than 85 decibels [dB] is associated with increased incidence of hearing loss. However, the risk that occupational noise exposure poses to orthopedic shoulder and elbow (S&E) surgeons is poorly understood. This study aims to (1) quantify the noise exposure of S&E surgeons in the operating room to determine if they are exposed to harmful noise levels and (2) identify which procedures pose the greatest risk of noise-induced hearing loss.
Methods
Intraoperative audio recordings were collected during S&E procedures via a wearable microphone worn under standard sterile surgical garb. S&E procedures were characterized as open reduction and internal fixation, arthroscopic soft tissue procedures, open soft tissue procedures, and arthroplasty. The highest sound pressure level (maximum dB levels [MDLs]) and the average dB level projected over an 8-h period (time-weighted average) were reported. The percentage of allowable daily noise dose was reported as “dose,” and the measured dose projected for over 8-h was reported as “projected dose.”
Results
We collected 116 recordings consisting of 65 arthroplasties, 5 open reduction and internal fixation, 11 open soft tissue procedures (distal bicep tendon repairs), and 35 arthroscopic soft tissue procedures. The average MDL was greater than the average control MDL for all S&E procedures and ranged from 88.7 to 112.6 dB. Shoulder arthroplasty had the highest average dose (1.4%), projected dose (8.4%), and time-weighted average (64.6 dB).
Conclusion
All recorded procedure types exposed surgeons to MDLs greater than 85 dB. Shoulder arthroplasty demonstrated the highest average exposure to harmful doses of noise and appears to pose the greatest risk for occupational noise exposure. Strategies should be considered to minimize the risk of noise-induced hearing loss amongst surgeons.
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