Objective:To investigate the correlation between the set mechanical angle(MA)by using an auxiliary photography device and the actual knee flexion angle(FA)in axial X-ray imaging for patellofemoral joint,so as to provide a theoretical basis for applying a self-developed dynamic adjustment device to achieve precisely dynamic radiography for patellofemoral joint,and to optimize diagnostic protocols of imaging for patellar dislocation,subluxation,etc..Methods:A prospective experimental design was adopted,which enrolled 96 healthy volunteers(40 males,56 females)whose age was 18-65 years old(mean age:32.6 years old).Using a self-developed dynamically auxiliary radiography device for axial position of patellofemoral joint,and the MA was set at 90°,120°,135°,150°,and 160°,and the corresponding FA was measured.At the same time,the gender,age,body mass index(BMI),thigh circumference,and calf circumference were also recorded.Statistical analysis was performed using SPSS 25.0 software.One-sample t-test was applied to analyze the difference value between MA and FA(MA-FA).Pearson correlation analysis and multiple linear regression analysis were conducted to conduct correlation analysis for the distribution characteristics of FA under different MA values,the FA and each anthropometric indicator.Results:FA showed a linear relationship with MA,BMI,thigh circumference,calf circumference,and gender.The regression equation was:FA=62.031+0.511×MA+0.489×BMI+0.189×thigh circumference-0.445×calf circumference+4.67×gender(R2=0.82,P<0.001).When MA was set at 90°,The actual FA was(112.21±4.7)° that was significantly larger than MA(90°),and the difference was significant(t=46.26,P<0.001).When MA was set at 120°,the actual FA was(126.19±6.43°),which was significantly greater than MA(120°)(t=9.42,P<0.001).When MA was set at 135°,there was not significant difference between FA and MA(P>0.05).When MA was set at 150°,the actual FA was(141.44±4.42°)that was significantly smaller than MA(150°),and the difference was significant(t=-18.97,P<0.001).When MA was set at 160°,the actual FA was(148.55±5.33°)that was significantly smaller than MA(160°),and the difference was significant(t=-21.03,P<0.001).BMI,thigh circumference,and calf circumference were the main factors of influencing the difference between MA and FA.Conclusion:Using the self-developed dynamic auxiliary radiography device for axial position of patellofemoral joint can construct a mathematical model to accurately predict,regulate and control the knee flexion angle,which can realize standardization for dynamic radiography on patellofemoral joint,and has significant clinical value in improving the diagnostic accuracy for imaging of patellar dislocation and subluxation.

Objective:To investigate the correlation between the set mechanical angle(MA)by using an auxiliary photography device and the actual knee flexion angle(FA)in axial X-ray imaging for patellofemoral joint,so as to provide a theoretical basis for applying a self-developed dynamic adjustment device to achieve precisely dynamic radiography for patellofemoral joint,and to optimize diagnostic protocols of imaging for patellar dislocation,subluxation,etc..Methods:A prospective experimental design was adopted,which enrolled 96 healthy volunteers(40 males,56 females)whose age was 18-65 years old(mean age:32.6 years old).Using a self-developed dynamically auxiliary radiography device for axial position of patellofemoral joint,and the MA was set at 90°,120°,135°,150°,and 160°,and the corresponding FA was measured.At the same time,the gender,age,body mass index(BMI),thigh circumference,and calf circumference were also recorded.Statistical analysis was performed using SPSS 25.0 software.One-sample t-test was applied to analyze the difference value between MA and FA(MA-FA).Pearson correlation analysis and multiple linear regression analysis were conducted to conduct correlation analysis for the distribution characteristics of FA under different MA values,the FA and each anthropometric indicator.Results:FA showed a linear relationship with MA,BMI,thigh circumference,calf circumference,and gender.The regression equation was:FA=62.031+0.511×MA+0.489×BMI+0.189×thigh circumference-0.445×calf circumference+4.67×gender(R2=0.82,P<0.001).When MA was set at 90°,The actual FA was(112.21±4.7)° that was significantly larger than MA(90°),and the difference was significant(t=46.26,P<0.001).When MA was set at 120°,the actual FA was(126.19±6.43°),which was significantly greater than MA(120°)(t=9.42,P<0.001).When MA was set at 135°,there was not significant difference between FA and MA(P>0.05).When MA was set at 150°,the actual FA was(141.44±4.42°)that was significantly smaller than MA(150°),and the difference was significant(t=-18.97,P<0.001).When MA was set at 160°,the actual FA was(148.55±5.33°)that was significantly smaller than MA(160°),and the difference was significant(t=-21.03,P<0.001).BMI,thigh circumference,and calf circumference were the main factors of influencing the difference between MA and FA.Conclusion:Using the self-developed dynamic auxiliary radiography device for axial position of patellofemoral joint can construct a mathematical model to accurately predict,regulate and control the knee flexion angle,which can realize standardization for dynamic radiography on patellofemoral joint,and has significant clinical value in improving the diagnostic accuracy for imaging of patellar dislocation and subluxation.

Objective:To analyze the classification and influencing factors of post-intensive care syndrome in family members of critically ill children, so as to provide reference for developing targeted intervention strategies.Methods:Using cross-sectional survey methods, the family members of critically ill children from January 2022 to June 2023 in the First Affiliated Hospital of Sun Yat-sen University were selected as research objects by convenience sampling method. The general information questionnaire, Pittsburgh Sleep Quality Index(PSQI), Fatigue Assessment Instrument(FAI), Hospital Anxiety and Depression Scale(HADS), and Impact of Event Scale-Revised(IES-R) were used for investigation, respectively.Results:Finally, 131 family members of critically ill children were included in the present study, 37 males, 94 females, aged 28-67 (39.47 ± 8.55) years. The incidence of PICS-F were 77.9% (102/131), the scores of PSQI, FAI, anxiety, depression and IES-R were (7.95 ± 3.39), (3.42 ± 1.34), (14.02 ± 5.47), (14.10 ± 5.54), (39.14 ± 7.92) points, respectively. The types of PICS-F in respondents were divided into four subtypes: sleep disturbance type were 42 cases accounting for 32.1%, stress disturbance type were 17 cases accounting for 13.0%, PICS-F high risk type were 40 cases accounting for 30.5%, PICS-F low risk type were 32 cases accounting for 24.4%. The length of ICU hospitalization was a common influencing factor for sleep disturbance type ( OR=0.103, 95% CI 0.020-0.520), stress disturbance type ( OR=0.073,95% CI 0.011-0.467), and PICS-F high risk type ( OR=0.115, 95% CI 0.022-0.589), all P<0.05. The per monthly income was a common risk factor for sleep disturbance type ( OR=5.510, 95% CI 1.193-5.445) and PICS-F high risk type ( OR=9.302, 95% CI 1.435-2.306), both P<0.05; the relationship with children was a specific risk factor for sleep disturbance type ( OR=0.083, 95% CI 0.009-0.734, P<0.05); the APACHEⅡscore was a specific risk factor for PICS-F high risk type ( OR=0.091, 95% CI 0.014-0.586, P<0.05). Conclusions:There are four latent profiles of PICS-F in family members of critically ill children, medical staff should establish targeted interventions according to the characteristics of different PICS-F classes.

Objective To improve the operation method of rupture of Achilles tendon for decreasing complication. Methods Total 39cases with closed rupture of Achilles tendon were selected in this study. Short incision was made at achilles tendon wall, reveal and anneal the broken ends, using Kirschner wire and steel-wire to make rectangle frame ,intradermic fixation of fracture away from the broken ends, then sutured ends with rarities and smoothing,functional exercise after 6weeks ankle rest position fixation. Results According to the Arner Lindholm evaluation system,the treatment outcome were excellent in 34 cases ,and good in 5cases. No complication including re-rupture skin ,tendon necrosis and infection were found after operation. Conclusion Repaired closed rupture of Achilles tendon with short incision and rectangle frame, assisted with ankle rest position fixation after operation wasa worthy way for treating closed rupture of a chilles tendon.