Human Factors: Do They Impact Surgical Performance?

Human factors in surgery relate to the environmental, organisational, and human factors that can impact performance in the operating theatre. This study assesses whether various factors such as music, counting backwards, and attempting to do simultaneous tasks impact surgical time and performance.

Ten orthopaedic surgical staff were asked to guide a metal loop around a metal maze in a 'don't buzz the wire' game. The primary outcomes were the course completion time and the number of times the loop touched the wire. They were asked to do the course four times: one control run, with music, whilst counting backwards from a hundred in increments of three, and whilst simultaneously verbalising the steps of a dynamic hip screw (DHS) fixation.

The average time to complete the course for the control was 33.8 seconds. This was similar to when music was played (33.4 seconds) but increased when counting backwards (38.7 seconds) and verbalising the steps of a DHS (69.8 seconds, p = 0.0039). The average number of touches for the control was 4.3. Similar findings were obtained when counting backwards (four touches), but the number of touches decreased when music was played (2.2 touches). The average number of touches increased to 10.6 when verbalising the steps of a DHS (p = 0.0078).

Human factors can affect surgical performance, and an awareness of this is vital to take necessary steps to minimise the impact this has on behaviour and performance in the operating theatre.