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Abstract：
Elastic stable intramedullary nailing (ESIN) internal fixation is used clinically to treat pathological fractures of bone cysts in children. However, one of the most important complications was removal difficulty. In this study, we aim to analyse the factors which can influence ESIN removal in healed bone cysts in children. From April 2014 to November 2020, the clinical data of 49 children who underwent elastic stable intramedullary nail removal for pathological fractures of the bone cysts in our hospital were retrospectively analysed. The following data, including age, sex, pathological fracture site, with bone graft, number of ESINs, ESIN indwelling time, and extraosseous length of ESIN were collected, and univariate analysis and logistic regression analysis was performed. The frequency of difficulty in ESIN extraction was 44.90% (22/49). The univariate logistic regression analysis showed that age,ESIN indwelling time,with bone garft and extraosseous length of ESIN may be correlated with the difficulty in removing ESIN (P < 0.05), while sex, pathological fracture site, number of ESIN may not be correlated with the difficulty in removing ESIN (P > 0.05).The multivariate logistic regression analysis showed that the ESIN indwelling time was the independent influencing factor for difficulty in removing ESIN (P < 0.05). The factors influencing the ESIN removal in healed bone cysts in children include over 11.79 years old, the long indwelling time of the ESIN(over 10.5 months),with bone graft and short extraosseous length of ESIN(≤ 0.405 cm). These factors influencing ESIN removal in healed bone cysts in children should be considered.
摘要：
弹性稳定髓内钉(ESIN)内固定在临床上用于治疗儿童骨囊肿病理性骨折。然而,最重要的并发症之一是切除困难.在这项研究中,我们旨在分析影响儿童骨囊肿愈合中ESIN去除的因素。回顾性分析2014年4月至2020年11月我院收治的49例骨囊肿病理性骨折患者行弹性稳定髓内钉拔除术的临床资料。以下数据,包括年龄,性别,病理骨折部位，用植骨，ESIN的数量,ESIN留置时间,并收集了ESIN的骨外长度，进行单因素分析和logistic回归分析。ESIN提取困难的频率为44.90%(22/49)。单因素Logistic回归分析显示,年龄,ESIN留置时间,骨钩和骨外长度的ESIN可能与去除ESIN的难度有关（P<0.05），而性爱,病理骨折部位，ESIN数量可能与ESIN去除难度无关(P>0.05)。多因素logistic回归分析显示,ESIN留置时间是ESIN去除困难的独立影响因素(P<0.05)。影响已愈合的儿童骨囊肿中ESIN去除的因素包括11.79岁以上，ESIN的长留置时间(超过10.5个月)，植骨和骨外长度短的ESIN（≤0.405cm）。应考虑影响儿童愈合骨囊肿中ESIN去除的这些因素。
