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IntroductionVascularized fibular autografts (VFA) are used in the oncologic skeletal reconstructions of long bones, alone or combined with massive bone allografts (MBA). Data regarding the role of imaging in assessing these complex skeletal reconstructions are lacking, and have mainly focused on Computed Tomography (CT). Our aim was to evaluate if early conventional radiography (CR) findings are correlated with the outcome of these skeletal reconstructions.Materials and methodsAll consecutive patients who underwent oncologic resection of lower limbs long bones followed by VFA reconstruction were included in this single-center retrospective study. We compared the CR obtained immediately after surgery with the CR at the 6-month control, as well as the CR at 6 months with the CT at 6 months when available. The following scores were assigned to the VFA: 0 (unchanged), 1 (osteopenia-cortical bone thinning), 2 (increase in bone density-cortical thickening). We then investigated whether this score correlated with the implant outcome within 12 months (optimal integration, suboptimal integration, integration requiring further surgery or lack of integration) using Kaplan-Meier and Cox regression analyses, considering the occurrence of integration and the duration time before the surgical removal of the whole bone reconstruction.ResultsForty-five patients were included (32 men [71.1%], mean age 14.6 years), 26 affected by osteosarcoma, 14 by Ewing sarcoma, 3 by adamantinoma and 2 operated for the failure of previous reconstructions for bone sarcoma. VFA changes on 6-month CR were significantly associated with optimal integration of the implants (log-rank P = 0.0137, multivariate Hazard ratio = 7.62, 95% confidence interval = 1.13–51.25). None of the other clinical and surgical features were associated with the implant outcome. The findings on 6-month CR and CT follow-up were not significantly different. CT at 6 months was available in 36 patients (80.0%).ConclusionThe assessment of VFA morphological changes on CR performed at 6 months can predict the outcome of the skeletal implant. This data should be considered for clinical decision-making, selecting patients requiring additional images (CT), and possible subsequent revision surgical procedures. 相似文献
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目的 对比磁共振弥散加权成像(MRI-DWI)与动态增强磁共振成像(DCE-MRI)对眼眶肿瘤的诊断价值。方法 收集聊城市眼科医院2019年6月~2020年12月80例眼眶肿瘤患者的临床资料,分为良性组(n=23)和恶性组(n=57)。比较两组MRI DWI参数、DCE MRI参数。以病理结果为金标准,分析MRI DWI、DCE MRI诊断眼眶肿瘤的效能。结果 恶性组表观扩散系数(ADC)低于对照组,恶性组血管外细胞外间隙百分比(Ve)、速率常数(Kep)、容积转换常数(Ktrans)高于良性组(P<0.05);两组时间 信号曲线(TIC)分型比较差异有统计学意义(P<0.05)。MRI-DWI、DCE-RI诊断眼眶肿瘤的准确度、特异度、灵敏度、阳性预测值、阴性预测值比较,差异无统计学意义(P>0.05)。〖HTH〗结论 〖HTK〗MRI-DWI、DCE-MRI均可有效诊断眼眶肿瘤,临床应综合评估量化指标及图像,以提高诊断准确度。 相似文献
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目的了解某三甲综合医院患者门诊预约精准性及其影响因素,比较正确预约与错误预约患者在预约可及性因素上的差异,寻找提高门诊预约精准性的干预点。方法采用现场调查法,于2021年6月14—21日在四川省成都市某三甲综合医院对70例门诊患者进行面访调查。结果门诊预约精准性低,错误预约患者占36.75%。单因素分析显示,预约精准性正向影响因素包括医疗保险保障度(P=0.004)、线下信息可及度(P=0.049)以及医务人员推荐依从度(P<0.001),负向影响因素包括网络信息依从度(P=0.012)、传统媒体信息可及度(P=0.024)以及自媒体推荐依从度(P<0.001);二分类非条件logistic回归分析显示,预约精准性与听从医务人员推荐正相关(P=0.002),与听从自媒体推荐负相关(P=0.014)。结论医疗机构需要加强宣传力度、丰富宣传内容,提高患者就诊的可及性;建议加强网络及传统媒体虚假医疗信息整治力度能改变门诊患者预约精准性低的现况。 相似文献
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《Journal of cranio-maxillo-facial surgery》2022,50(8):609-614
The aim of this study is to compare the accuracy of maxilla positioning in orthognathic surgery with the use of custom-made devices (cutting guides and patient-fitted osteosynthesis plates) comparing to CAD/CAM splints.A prospective randomized study was performed. Patients with dentofacial deformities undergoing orthognathic surgery were compared, using customized guides (experimental group) vs. CAD/CAM surgical splints (control group) for the repositioning of the upper maxilla. Preoperative and postoperative CT scans were used to compare positioning and fixation of the maxilla in the three planes of space.A total of 30 patients were included in the study (15 patients in each study group). The mean error obtained with customized guides was 0.8 mm (range 0.1–1.9) in the anterior-posterior axis, 0.4 mm (range 0–1.4) in the vertical axis and 0.2 mm (range 0–1.1) in the horizontal axis. There were statistically significant differences in the anterior-posterior and vertical axes in favour of the customized implants, whereas there were no differences in the horizontal plane. Furthermore, there was a mean reduction of the operative time of 36.5 min in the experimental group.Within the limitations of the study it seems that patient specific surgical guides should be preferred when accuracy of repositioning of the maxilla and saving operative time are the priority. 相似文献
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