Organization Team of the Skills Lab of the German Society of Surgery (DGCH), Berlin, Germany.
Department of General Surgery, Philipps University Marburg, Marburg, Germany.
Surg Endosc. 2022 May;36(5):3533-3541. doi: 10.1007/s00464-021-08675-9. Epub 2021 Aug 30.
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.
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.
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.
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.
咖啡是一种广泛饮用的饮料。外科医生在手术前经常喝咖啡。咖啡因摄入会导致震颤，这可能对外科医生的精细运动技能产生负面影响。
为了研究咖啡因摄入是否会对腹腔镜技能产生负面影响并增加震颤，无论之前是否喝咖啡，我们进行了一项双盲平行组试验。在德国外科学会大会期间，选择了 118 名参与者。排除标准为不成熟和未给予同意。参与者和研究者均处于盲态。参与者按照 1:1 的比例随机分为干预组（饮用含咖啡因的咖啡）或安慰剂组（饮用脱咖啡因的咖啡）。在腹腔镜模拟器（LapSim®）上进行了两项经过验证的腹腔镜练习，在饮用咖啡前和 30 分钟后测试运动技能。在标准化问卷中记录了影响因素的数据，并在两组中测试了其均等分布。在两项练习中，记录了四个参数：左手和右手的路径长度和角度路径。计算了两组的差异和由此产生的效果评分，作为主要结果，以测试哪个组在第二轮练习中表现出更大的改善。注册号 DRKS00023608，事后注册。
每组 59 名受试者被分配到干预组（54 名分析）和安慰剂组（53 名分析），各有 11 名脱落。在咖啡摄入后 30 分钟，两组在第二项练习中的效果评分差异无统计学意义[平均值（标准差）；38.58（10.66）vs. 41.73（7.40）和 113.09（28.94）vs. 116.59（25.63）]。两组在第一项练习中均观察到从第一次测量到第二次测量的显著改善，这证明了训练效果。
在我们的研究中，我们验证了额外摄入含咖啡因的咖啡，例如在喝咖啡休息期间，不会导致腹腔镜精细运动技能的恶化。
