Noise in the operating room coincides with surgical difficulty

Area of Science:

• Anesthesiology and Perioperative Medicine
• Surgical Outcomes Research
• Healthcare Management and Policy

Background:

• Operating room (OR) noise is a known distractor for surgical teams and linked to adverse postoperative outcomes.
• The precise relationship between OR noise, surgical difficulty (objective vs. subjective), and complications remains unclear.

Purpose of the Study:

• To investigate the association between intraoperative noise levels, objective and subjective surgical difficulty, and postoperative complications.
• To determine whether noise is a direct cause of complications or a marker of underlying surgical complexity.

Main Methods:

• Noise levels were measured prospectively during 294 operations across four Swiss hospitals.
• Objective surgical difficulty was quantified using the Physiological and Operative Severity Score for the enUmeration of Mortality and Morbidity (POSSUM), operation duration, and surgical approach.
• Subjective difficulty and distraction were assessed via team questionnaires, with complications tracked for 30 days post-surgery.

Main Results:

• Postoperative complications occurred in 38% of procedures.
• Significantly higher noise levels were observed in objectively and subjectively more difficult operations and those with complications.
• Multivariable analysis indicated that subjective difficulty was associated with noise and complications, while objective surgical difficulty independently predicted both noise and complications.

Conclusions:

• Intraoperative noise acts as a surrogate marker for surgical difficulty.
• Objective surgical difficulty is a key predictor of both operating room noise and subsequent postoperative complications.