[Objective]To compare the surgical efficacy of distal locking screw placement among conventional mechanical guide(CMG),two pin fluoroscopy(TPF)and domestic visual electromagnetic navigation system(EMN).[Methods]A retrospective study was per-formed on 45 adult patients who received interlocking intramedullary nailing for femoral shaft fractures from January 2018 to July 2022.Ac-cording to the doctor-patient communication,the patients were divided into a CMG,TPF and EMN groups,with 15 cases in each group.The operative efficacy of the three groups was compared.[Results]All patients in the 3 groups had operation performed successfully.The CMG,TPF and EMC group were recorded in terms of operation time[(150.5±39.5)min vs(118.3±31.4)min vs(113.3±29.5)min,P=0.008],total length of the distal incision[(5.2±0.3)cm vs(4.0±0.3)cm vs(4.1±0.2)cm,P＜0.001],distal locking time[(39.3±12.3)min vs(32.1±7.7)min vs(30.1±6.1)min,P=0.020],fluoroscopy times for distal locking[(8.1±2.6)times vs(10.3±2.4)times vs(4.3±1.0)times,P＜0.001],and the success rate of the first screw placement of the distal hole(66.7％vs 80.0％vs 100％,P=0.042).The VAS scores for pain of the CMG,TPF and EMC groups were[(4.8±0.7)vs(3.7±0.7)vs(3.5±0.6),P＜0.001]one week after surgery,while which became not statistically signif-icant among the three groups at the latest follow-up(P＞0.05).[Conclusion]Compared with the conventional mechanical guide,both two pin fluoroscopy and visual electromagnetic navigation system do improve operation efficacy in shortening the time of distal screw placement and shortening the total operation time.
NETL
NSTL
万方数据
