Correlation between lower limb alignment and risk factors of patellofemoral pain syndrome in young men / 中国组织工程研究

BACKGROUND:The risk factors for patellofemoral pain syndrome are still unclear and research on risk factors is gradually becoming a hot topic in order to improve the therapeutic outcome of this disease. OBJECTIVE:To investigate the relationship between lower limb alignment and patellofemoral pain syndrome in young male runners. METHODS:In the same running population,21 patients with bilateral knee pain,29 patients with single knee pain and 20 normal runners were collected from January 2021 to July 2022.Full-length X-ray examination of both lower limbs in standing position was performed in all subjects.The lateral distal femoral angle,medial tibial proximal angle,joint line congruence angle,hip-knee-ankle angle,and knee physical valgus angle were measured and statistically analyzed. RESULTS AND CONCLUSION:There was no significant difference in the parameters between the left and right knees in each group(P>0.05).Compared with the normal group,no significant changes in lateral distal femoral angle,medial tibial proximal angle,joint line congruence angle,and hip-knee-ankle angle were observed in the single knee pain group and double knee pain group,while the knee physical valgus angle was significantly increased in these two groups(P<0.05).To conclude,increased knee physical valgus angle may be a risk factor for patellofemoral pain syndrome.

Analysis of influence factors of long-term efficacy of different fusion combined with pedicle fixation for lunbar spondylolysis / 中国医师进修杂志

Objective To analyze the influence factors of long-term efficacy of different fusion combined with pedicle fixation for lumbar spondylolysis.Methods The surgical and postoperative follow-up data of 196 cases with lumbar spondylolysis were analyzed retrospectively.Age,gender,body mass index ( BMI ),disease course,preoperative Japanese orthopaedic association (JOA) score,fusion segments,fusion method,immediate postoperative recovery rate and postoperative functional exercise,which might affectlong-term operation efficacy,were selected to undergo single-factor analysis and multivariate regression analysis.Results All the patients were followed up for 5-9 years and 5.4 years for average,163 cases got excellent or good curative effect,the rate of excellent and good effect was 83.2％( 163/196);33 cases got poor efficacy.There was no cerebrospinal membrane tear,cerebrospinal fluid leakage,infection,fracture fixation and other complications happened after operation.Single-factor analysis showed that disease course,BMI,preoperative JOA score and postoperative functional exercise had obvious relation with long-term efficacy (P ＜ 0.05 ) ;while age,fusion method,fusion segments,immediate postoperative recovery rate and gender had no significant relation with long-term efficacy (P ＞ 0.05).Multivariate regression analysis showed that disease course,preoperative JOA score,postoperative functional exercise were important factors influencing long-term efficacy (OR =1.423,2.089,1.320,P=0.023,0.012,0.034).Conclusions Disease course,preoperative JOA score,postoperative functional exercise are important factors influencing long-term efficacy of surgery for patients with lumbar spondylolysis.

Correlation of MR tomographic findings and microvascular decompression treatment of the neurovascular compressions of the cranial nerves / 中华放射学杂志

Objective To explore the correlation of the operation effects of the miorovascular decompression(MVD) and the findings on magnetic resonance tomographic angiography(MRTA) in patients of neurovascular compression of the cranial nerves.Methods Two hundred and twenty three patients treated with the microvascular decompression were analyzed retrospectively.They were grouped and graded according to the vessel compression on the cranial nerves.The compression were grouped as none, moderate and severe, and the operation effects were graded as Ⅰ ( complete relief), Ⅱ ( partial relief) and Ⅲ ( no relief).The operation effects grades were correlated according to the compression groups by Kruskal-Wallis test and the operation effects between each two of the groups were compared using Nemenyi test.P < 0.05 was defined as statistic significant.Results Of the 53 cases of non-compression group, 31 cases were graded as Ⅰ , 13 cases were graded as Ⅱ and 9 cases were graded as Ⅲ, according to the operation-effects of the decompression.Of the 110 cases of moderate group,95 cases were grade as Ⅰ , 11 cases were graded as Ⅱ and 4 cases were graded as Ⅲ.Of the 60 cases of severe group, 48 cases were graded as Ⅰ, 7 cases were graded as Ⅱ and 5 cases were graded as Ⅲ.There were statistic significance among the three groups,where χ2= 16.84 and P <0.05.The mean rank of the non-compression, the moderate and the severe group was 134.21,102.37 and 110.4 ,respectively.The difference of the mean ranks between the non-compression group and the moderate group was 31.84, and between the non-compression and the severe group was 24.17, respectively, where P < 0.05 both.Conclusions There was close relationship between the findings on magnetic resonance tomographic angiography and the operation effects of the MVD.The operation effects of patients with moderate and severe vessel compression were much better than the non-compression group.MRTA is helpful for MVD surgical indication and its prognosis.