Clark Anna E, Shaw Caroline J, Bello Fernando, Chalouhi Gihad E, Lees Christoph C
Queen Charlotte's and Chelsea Hospital Imperial Healthcare NHS Trust London UK.
Institute of Reproductive and Developmental Biology, Department of Metabolism, Digestion and Reproduction Imperial College London London UK.
Australas J Ultrasound Med. 2020 Aug 2;23(3):183-193. doi: 10.1002/ajum.12221. eCollection 2020 Aug.
To investigate and compare the effect of simulator training on quantitative scores for ultrasound-related skills for trainees with novice level ultrasound experience and expert ultrasound operators.
Three novice (comprising of 11, 32, 23 participants) and one expert (10 participants) subgroups undertook an ultrasound simulation training session. Pre- and post-training test scores were collected for each subgroup. Outcome measures were as follows: mean accuracy score for obtaining the correct anatomical plane, percentage of correctly acquired target planes, mean number of movements, time to achieve image, distance travelled by probe and accumulated angling of the probe.
The novices showed improvement in image acquisition after completion of the simulation training session with an improvement in the rate of correctly acquired target planes from 28-57% to 39-83%. This was not replicated in the experts. The novice's individual ratios based on pre- vs. post-training metrics improved between 1.7- and 4.3-fold for number of movements, 1.9- and 6.7-fold for distance, 2.0- and 5.2-fold for time taken and 1.8- and 7.3-fold for accumulated angling. Among the experts, there was no relationship between pre-training simulator metrics and years of ultrasound experience.
The individual simulation metrics suggest the sessions were delivered at an appropriate level for basic training as novice trainees were able to show demonstrable improvements in both efficiency and accuracy on the simulator. Experts did not improve after the simulation modules, and the novice scores post-training were similar to those of experts, suggesting the exercises were valid in testing ultrasound skills at novice but not expert level.
调查并比较模拟器训练对超声经验处于新手水平的学员以及专业超声操作员的超声相关技能定量评分的影响。
三个新手亚组（分别由11名、32名、23名参与者组成）和一个专家亚组（10名参与者）参加了超声模拟训练课程。收集每个亚组训练前和训练后的测试分数。结果测量指标如下：获得正确解剖平面的平均准确度分数、正确获取目标平面的百分比、平均动作次数、获取图像的时间、探头移动的距离以及探头的累计角度。
新手在完成模拟训练课程后图像采集能力有所提高，正确获取目标平面的比例从28%-57%提高到39%-83%。专家组未出现这种情况。基于训练前与训练后指标，新手的个人比率在动作次数方面提高了1.7至4.3倍，在距离方面提高了1.9至6.7倍，在获取图像时间方面提高了2.0至5.2倍，在累计角度方面提高了1.8至7.3倍。在专家中，训练前模拟器指标与超声经验年限之间没有关系。
个体模拟指标表明，这些课程对于基础训练的难度设置是合适的，因为新手学员在模拟器上的效率和准确性都有明显提高。专家在模拟模块训练后没有进步，新手训练后的分数与专家相似，这表明这些练习对于测试新手而非专家水平的超声技能是有效的。
