Background

Coffee is a widely consumed beverage. Surgeons often drink coffee before performing surgery. Caffeine intake leads to tremor which might have a negative effect on surgeons’ fine motor skills.

Methods

A double-blinded parallel-group trial was conducted in order to investigate if caffeinated coffee intake has a negative effect on laparoscopic skills and increases tremor, regardless of previous coffee consumption. 118 participants were selected during a congress of the German Society of Surgery. Exclusion criteria were immaturity and no given consent. Participants and investigators were blinded. Participants were randomized with a 1:1 allocation into interventional group receiving caffeinated coffee or placebo group receiving decaffeinated coffee. The motor skills were tested with two validated laparoscopic exercises at a laparoscopy simulator (LapSim®) before and 30 min after coffee intake. Data on influencing factors were recorded in a standardized questionnaire and tested for equal distribution in both groups. In both exercises four parameters were recorded: left and right hand path length and angular path. Their differences and the resulting effect scores were calculated for both groups as primary outcome to test which group showed greater improvement on the second round of exercises. Registration number DRKS00023608, registered retrospectively.

Results

Fifty nine subjects were assigned to each the interventional (54 analyzed) and placebo group (53 analyzed) with 11 drop outs. There was no significant difference between the placebo and interventional group in the two exercises in effect score 30 min after coffee intake [mean (SD); 38.58 (10.66) vs. 41.73 (7.40) and 113.09 (28.94) vs. 116.59 (25.63)]. A significant improvement from first to second measurement in the first exercise could be observed for both groups, demonstrating the training effect.

Conclusion

In our study, we verified that additional caffeinated coffee intake, e.g., during a coffee break, does not lead to deterioration of laparoscopic fine motor skills.

中文翻译：

---

茶歇对腹腔镜检查技能没有影响：一项随机双盲安慰剂对照平行组试验

背景

咖啡是一种广泛饮用的饮料。外科医生在进行手术前经常喝咖啡。摄入咖啡因会导致震颤，这可能会对外科医生的精细运动技能产生负面影响。

方法

进行了一项双盲平行组试验，以调查摄入含咖啡因的咖啡是否会对腹腔镜检查技能产生负面影响并增加震颤，无论以前是否喝过咖啡。在德国外科学会的一次代表大会上选出了 118 名参与者。排除标准为不成熟且未给予同意。参与者和研究人员被蒙蔽了双眼。参与者以 1:1 的比例随机分配到接受含咖啡因咖啡的干预组或接受不含咖啡因的咖啡的安慰剂组。在摄入咖啡之前和之后 30 分钟，在腹腔镜模拟器 (LapSim®) 上通过两次经过验证的腹腔镜练习来测试运动技能。影响因素的数据记录在标准化问卷中，并在两组中进行平均分布测试。在这两个练习中，记录了四个参数：左手路径长度和右手路径长度和角度路径。计算两组的差异和由此产生的效果分数作为主要结果，以测试哪一组在第二轮练习中表现出更大的进步。注册号DRKS00023608，追溯注册。

结果

59 名受试者被分配到干预组（54 名已分析）和安慰剂组（53 名已分析），其中 11 名退出。在咖啡摄入后 30 分钟的两个练习中，安慰剂组和干预组之间的效果评分没有显着差异 [平均值 (SD); 38.58 (10.66) 与 41.73 (7.40) 和 113.09 (28.94) 与 116.59 (25.63)]。可以观察到两组在第一次练习中从第一次测量到第二次测量的显着改善，证明了训练效果。

结论

在我们的研究中，我们验证了额外摄入含咖啡因的咖啡，例如，在喝咖啡期间，不会导致腹腔镜精细运动技能的恶化。