January 19, 2015

Crossover study of the effects of coffee consumption on simulated laparoscopy skills

V Quan et al, 2015, Crossover study of the effects of coffee consumption on simulated laparoscopy skills, International Journal of Surgery, published online ahead of print.


Aims: To observe the effect of caffeine on performing laparoscopic skills in novices in a simulated setting.

Background:  Coffee is consumed almost ubiquitously by surgeons not just as a stimulant but also socially in the well-rested individual. It’s therefore worth investigating its potentially negative effect on performance of surgical skills as it is known that coffee has psychomotor effects.

Methods: This is a single-blind crossover study in which 31 novices were tested under three different conditions: decaffeinated, 100mg caffeine and 200mg caffeine. Candidates were asked to perform 3 repetitions of task 3, 6, 7 and 8 using the Lap Mentor™ (Simbionix®). Outcomes measured were completion time, accuracy, number of movements and total path length. The candidates were crossed over to the other caffeine doses on a different day.

Results: 20 candidates completed the study, mean age 21.3 years, with 10 males and 10 females. Candidates performed tasks 7 and 8 faster in the decaffeinated group than the caffeinated groups with significant differences between decaffeinated and 100mg caffeine (p-value=0.001, 0.019 respectively) and decaffeinated and 200mg in task 8(p-value=0.042). Total path length was significantly less in the decaffeinated group in tasks 7 and 8 and total number of movements was less in tasks 3, 7 and 8.

Conclusion: Caffeine had no marked effect on accuracy, but had a negative effect on task economy (hand movements, total path length and completion time).

Modtag nyhedsbrev

Ja tak, jeg vil gerne modtage nyhedsbrev, når der er noget nyt om kaffe og helbred.