A 3D transparent spinal canal model that can be used for teaching the specific gravity of different drug solutions in subarachnoid block

Zhao Yuanyu; Pan Naifan; Sun Xufang; Liu Chang; Guan Huiwen; Feng Junjie; Cheng Shengquan; Zhang Xiao; Zhang Chuncheng

doi:10.3969/j.issn.2096-4293.2024.04.016

Abstract：Objective To evaluate whether the lumen mold of the human transparent spinal canal invented by the Department of Anesthesiology of the Second Hospital of Jilin University using 3 D printing technology could meet the needs of teaching the proportion of different drug solutions in subarachnoid block.Methods Nineteen residents of grade 2021 in the anesthesia department of the hospital were selected for teaching and training on subarachnoid block.On the experimental platform of a 3 D human transparent spinal canal model,an electronic pump was used to pump quantitative methylene blue at a uniform speed to stain local anesthetic solutions of different specific gravities.The diffusion patterns of the drugs were observed and recorded,and the established survey questionnaire content was completed.Results Through the 3 D printed transparent spinal canal experimental platform,the diffusion law of local anesthetics of different specific gravities was intuitively observed.The light specific gravity chemical solution spreaded to the head and caudal side along the side wall attached to the upper side of the lumen in a fusiform shape,and the diffusion range and speed were wider and faster than the equal specific gravity and heavy specific gravity.The equal specific gravity chemical solution was evenly distributed and diffused in the lumen of the tube,but the diffusion range was smaller than the heavy and light specific gravity solutions.For the heavy specific gravity chemical solution,the range was fusiform.It mostly accumulated on the sacrococcygeal side,and spreaded to the lower part when changing the position.84.2%of the residents believed that the model made up for the shortcomings of video teaching,89.5%of the residents believed that the model teaching improved the understanding of spinal anesthesia puncture operation,and the drug diffusion demonstrated by the model was easier to understand,and 94.7%of the residents recommended the model for future spinal anesthesia teaching.Conclusion The diffusion of local anesthetic solutions of different specific gravities in the transparent spinal canal model is obvious,which meets the needs of teaching the specific gravity of different chemical solutions in lumbar anesthesia.