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Stapedectomy in sheep: an animal model for surgical training.

机译:绵羊的骨切除术:一种用于手术训练的动物模型。

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摘要

HYPOTHESIS AND BACKGROUND: : Stapedectomy is a surgical technique that requires progressive training. The external and middle ear of sheep have a close resemblance to the human and have been previously used as surgical training models. In our project we describe the anatomy of the middle and external ear in sheep focusing on surgical landmarks and technique in order to determine whether the sheep's ear is an adequate model for stapedectomy training. MATERIALS AND METHODS: : We reviewed the literature on sheep anatomy and use of sheep as an otologic surgical model. Macroscopic sections as well as temporal bone computed tomography were obtained. Stapedectomy was performed on 40 sheep, using 4 mm platinum piston prosthesis, by first year residents. RESULTS: : Most of the structures in the sheep's middle ear are similar to those in humans although their size is about two thirds smaller. Incus long process is shorter, thicker, and closer to the malleus body, making the piston insertion and adjustment more difficult. The median surgical time of stapedectomy was reduced from 70 (52,5-100,3) minutes to 39,5 (35,5-48) minutes after completing training. There was also a reduction in rate of complications (flap disruption, incus dislocation, and footplate mobilization). CONCLUSION: : Sheep ears constitute a cheap, easy to obtain and anatomically adequate model for stapedectomy training.
机译:假设和背景::稳定切除术是一种需要进行渐进训练的手术技术。绵羊的外耳和中耳与人类非常相似,并以前被用作外科训练模型。在我们的项目中,我们描述了绵羊中中耳和外耳的解剖结构,专注于手术地标和技术,以确定绵羊的耳朵是否是骨切除术训练的适当模型。材料和方法::我们回顾了有关绵羊解剖结构以及将绵羊用作耳科手术模型的文献。获得了宏观切片以及颞骨计算机断层扫描。第一年居民使用4毫米白金活塞假体进行了40羊切除术。结果::绵羊中耳中的大多数结构与人类中的大多数结构相似,尽管它们的大小较小三分之二。 incus漫长的过程较短,更厚,并且更靠近麦芽体体,使活塞插入和调节更加困难。完成训练后的39,5(35,5-48)分钟,将骨切除术的中位手术时间从70分钟(52,5-100,3)分钟缩短。并发症率也降低了(瓣破坏,incus脱位和脚踏板动员)。结论::绵羊耳朵构成了一种廉价,易于获得和解剖学上的足够模型,可用于骨切除术训练。

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