A non-living, effective model for microvascular training

Abstract Purpose: To introduce a nonliving microvascular training model based on vessels diameter and feasibility. Methods: We dissected ten oxen tongues, and divided the pedicles into three-thirds: proximal, middle and distal. We measured the external vessels diameter in all regions. We performed a descriptive statistical analysis. Three students (two beginner level and one intermediate level) performed this training. We evaluated the confidence, according Likert scale. Results: We dissected all oxen tongues, each tongue showed two parallel pedicles. Each pedicle was located at 1.5 - 2.0 cm from the midline. Proximal median artery and vein diameter were 3.9 ± 0.7, and 5.04 ± 1.44mm, respectively. In the middle third, the mean artery diameter was 3.3 ± 0.4mm, and the vein diameter was 3.5 ± 0.9mm. The distal third showed a mean artery diameter of 2.0 ± 0.42mm, and a vein diameter of 2.4 ± 0.82mm. The students performed ten anastomoses. This study showed a higher confidence level (CL) (p=0.03) than the pre training CL assessment. Conclusion: This study suggested a feasible non-animal model for microsurgical training process for beginners and intermediate trainees.

摘要

研究目的：旨在介绍一款基于血管管径参数的非活体微血管训练模型，并验证其应用可行性。

方法：本研究解剖10个牛舌标本，将其血管蒂分为近段、中段与远段三部分；对各区域的血管外径进行测量，并开展描述性统计分析。招募3名学员（2名入门级、1名进阶级）参与本训练，采用李克特（Likert）量表对其操作信心进行评估。

结果：所有牛舌标本均成功解剖，每侧牛舌可见两条平行的血管蒂，每条血管蒂距中线1.5~2.0 cm。近段正中动脉与静脉的管径分别为3.9±0.7 mm与5.04±1.44 mm；中段动脉平均管径为3.3±0.4 mm，静脉平均管径为3.5±0.9 mm；远段动脉平均管径为2.0±0.42 mm，静脉平均管径为2.4±0.82 mm。学员共完成10例血管吻合操作。本研究结果显示，学员术后操作信心水平较训练前显著提升（p=0.03）。

结论：本研究证实，该非活体模型可用于入门级与进阶段显微外科手术学员的训练，具备良好的应用可行性。