RESUMO
Objective To evaluate the application of a self-designed handy body position scaffold in the fluoroscopy for lower limb surgery.Methods We reviewed the intraoperative X-ray films of 161 patients with lower limb fracture who had undergone intraoperative fluoroscopy using our self-made handy body position scaffold during surgery from October 2013 to May 2017.They were 105 males and 56 females,aged from 10 to 91 years (mean,39.7 years).There were 42 femoral fractures of middle or lower shaft,12 fractures of medial or lateral condyle or tibial plateau,96 tibiofibular fractures,7 ankle fractures and 4 foot fractures.The operation time,intraoperative fluoroscopy time,intraoperative bleeding,rate and time of fracture union,and complications were recorded.Results All the 161 patients completed intraoperative fluoroscopy and radiography uneventfully,indicating that the handy body position scaffold effectively maintained the body position of the affected ipsilateral lower limb.The body position scaffold was slightly deviated due to one overweight (121 kg) patient when the knee joint was flexed 90°,but the fluoroscopy and radiography was completed after adjustment of the C-arm roentgenographic machine.The operation time averaged 71.5 minutes (from 28 to 119 minutes),the X-ray exposure time 9.8 seconds (from 6 to 31 seconds),and the intraoperative bleeding 157.2 mL (from 80 to 500 mL).The 161 patients obtained follow-up for 5 to 22 months (average,14.1 months).The rate of primary union was 97.5％ (157/161).The time for fracture union averaged 8.8 weeks (from 4 to 17 weeks).Fracture nonunion occurred in one case,and delayed union in 3 cases.The final follow-ups revealed normal functional recovery of the affected knees and ankles,but no limb shortening,or no rotational,lateral or anteroposterior angulation deformity.Conclusion In the lower limb surgery,the intraoperative fluoroscopy can be completed better with the aid of our self-designed handy body position scaffold that prevents movement of the affected lower limb and lowers the risk of radiation exposure.
RESUMO
The purpose of this study was to found a three dimensional anatomical model of normal knees in Chinese and to carry out measurements of the relating parameters with this model. Three dimensional CT scan of 18 normal Chinese (36 knees) were acquired. All the cases were divided into three groups according to the height of each individual (156～165cm, 166～175cm, 176～185cm), with each group consisting of 6 individuals (12 knees). Data of the 6 ipsilateral knees were integrated to create a typical three dimensional anatomical model. Altogether 15 parameters including the linear and the angular indices were measured through this model. The results showed: (1) Most anatomical characteristics of the knee of typical Chinese population could be covered by the 3 D model we established; (2) There were stable positive relationships between different linear parameters and between the linear parameters and the body height; (3) The angular parameters were comparatively independent. This well developed 3 D model could provide a reliable method on the measurements of the knee geometry in Chinese people.