1.Application of Simple Drawing Line Puncture Combined With Visual Articular Process Arthroplasty Technique in Lateral Foraminoscopy
Xiaoqiang LIU ; Jiayi LUO ; Changwei GU ; Kaixiang LI ; Zhanghua ZHONG ; Xiangjun ZHAO ; Ruibing LI ; Hongwei WANG
Chinese Journal of Minimally Invasive Surgery 2025;25(4):227-232
Objective To explore the application value of simple drawing line puncture combined with visual articular process arthroplasty in lateral foraminoscopy.Methods A retrospective analysis was performed on 89 patients with single-segment lumbar disc herniation treated with lateral foraminoscopy from May 2019 to December 2022,including traditional transforaminal endoscopic spine system(TESSYS)technology(conventional group,35 cases)and simple drawing line puncture combined with visual articular process arthroplasty(modified group,54 cases).The fluoroscopy times,puncture time,and operation time of the two groups were compared.The Visual Analogue Score(VAS),Oswestry Disability Index(ODI),and MacNab criteria were used to evaluate the surgical effect at 3 d after surgery and at the last follow-up.Results All the operations were successfully completed without conversion to open surgery.In the conventional group,there was 1 case of L4 nerve root injury,who was considered intraoperative nerve root compression injury.There was no abnormality in lower limb muscle strength after surgery,but hyperalgesia and numbness in the innervated cutaneous area accompanied by nocturnal cramps.The patient was given treatment with pregabalin,mecobalamin,vitamin B1 and B6 for 2 months,and returned to normal at 1 year of follow-up.The other cases had no complications such as dural injury,abdominal organ injury,or incision infection.Recurrence occurred in 1 case in the conventional group and 2 cases in the modified group,and all the 3 cases occurred within 3 months after operation.Among them,2 patients had severe symptoms and underwent endoscopic revision again,and the other patient improved after conservative treatment.Compared with the conventional group,the puncture times[(1.8±0.7)times vs.(7.5±1.1)times,t=27.543,P=0.000].fluoroscopy times[(5.7±1.8)times vs.(23.2±2.2)times,t=41.235,P=0.000]and operation time[(72.7±7.2)min vs.(92.7±7.7)min,t=12.317,P=0.000]in the modified group were significantly reduced or shortened,and there was no significant difference in postoperative hospital stay[(3.2±0.6)d vs.(3.3±0.6)d,t=0.062,P=0.951]between the two groups.The conventional group was followed up for(14.0±1.3)months and the modified group was followed up for(13.6±1.2)months.There were no significant differences in VAS scores[(1.5±0.6)points vs.(1.6±0.7)points,t=0.751,P=0.455].ODI[(10.8±3.4)%vs.(11.8±3.9)%,t=1.284,P=0.202].and excellent and good rate of MacNab criteria[100%(54/54)vs.100%(35/35),Z=-0.981,P=0.327]between the two groups at the last follow-up.Conclusions Simple drawing line puncture combined with visual articular process arthroplasty can significantly improve the accuracy of intervertebral foramen aspiration,with simple operation,reduced X-ray exposure for doctors and patients,shortened operation time,and improved surgical safety.It is worthy of promotion and application in percutaneous foraminoscopy.
2.Efficacy of intelligent temperature-pressure-controlled flexible ureteroscopy combined with negative-pressure suction sheath lithotripsy in the treatment of ≤2.5 cm upper urinary tract stones
Xiaofu WANG ; Yunxiang ZHANG ; Xinyu SHI ; Yongli ZHAO ; Changbao XU ; Changwei LIU ; Haiyang WEI ; Xinghua ZHAO
Journal of Modern Urology 2025;30(4):311-314
Objective: To investigate the efficacy and safety of intelligent temperature-pressure-controlled flexible ureteroscopy combined with negative-pressure suction sheath lithotripsy in the treatment of upper urinary tract stones ≤2.5 cm. Methods: The clinical data of 225 patients with ≤2.5 cm upper urinary tract stones treated with this surgical method in our department during Aug. 2023 and Jul. 2024 were retrospectively analyzed. The patients were divided into the dual-control group (n=36) and conventional group (n=189) according to whether or not the intelligent temperature and pressure control device was used during operation. In the dual-control group,the intraoperative temperature and pressure in the renal pelvis were monitored and controlled in real time by the temperature and pressure sensors distributed at the end of the ureteral soft lens. The perioperative parameters,stone-removal rate,complication rate and renal function were compared between the two groups. Results: All operations were successfully completed in both groups. The postoperative procalcitonin (PCT) level [(22.75±5.85) ng/L vs. (29.08±6.60) ng/L,P=0.001],difference in the white blood cell (WBC) level [(0.24±2.12)×10
cells/L vs. (1.19±2.17)×10
cells/L,P=0.016],incidence of fever (2.8% vs. 16.9%,P=0.028) and overall complication rate (5.6% vs. 19.6%,P=0.042) were significantly lower in the dual-control group than in the conventional group,while the stone-clearance rate was slightly higher (88.9% vs. 82.5%,P=0.346),with no significant difference. Conclusion: For upper urinary tract stones ≤2.5 cm,intelligent temperature-pressure-controlled ureteroscopy combined with negative-pressure suction sheath lithotripsy has a satisfactory stone-removal rate and a low rate of complications,which is worthy of clinical promotion.
3.The value of whole exome sequencing in the etiological diagnosis and treatment of urolithiasis
Yongli ZHAO ; Changbao XU ; Xiaofu WANG ; Xinyu SHI ; Changwei LIU ; Wuxue LI ; Danhua LIU ; Hongen XU
Chinese Journal of Urology 2025;46(10):739-744
Objective:To evaluate the role of whole exome sequencing(WES)in the etiological diagnosis and precision medicine management of patients with urolithiasis.Methods:We conducted a retrospective review of 21 patients with urolithiasis and pathogenic gene mutations identified by WES at The Second Affiliated Hospital of Zhengzhou University between April 2019 and March 2025. The cohort included 13 males and 8 females,with a mean age of(18.9 ± 11.1)years;18 patients were under 25 years old. Clinical presentations included nephrocalcinosis(8 patients)and urinary tract calculi(13 patients),with five patients exhibiting extra-renal manifestations such as renal tubular acidosis and hyperaldosteronism. Stone composition analysis identified calcium oxalate(16 patients),cystine(4 patients),and carbonate apatite(1 patient). Metabolic abnormalities were prevalent,including hypocitraturia(11 patients),hyperoxaluria(8 patients),and hypercalciuria(7 patients),with eight patients presenting two or more concurrent disorders. All patients underwent WES and comprehensive metabolic evaluation. Sequencing was performed on an Illumina Hiseq4000 platform,achieving a mean depth of > 100× and coverage of > 98% in target regions. Variants were classified according to the American College of Medical Genetics and Genomics(ACMG)guidelines.Results:WES identified 12 distinct genes across autosomal recessive(9 genes: AGXT, GRHPR, ATP6V1B1, SLC12A1, KCNJ1, SLC3A1, SLC7A9, SLC34A3, WFS1),autosomal dominant(2 genes: CASR, ADCY10),and X-linked recessive(1 gene: CLCN5)inheritance patterns. Genotype-phenotype correlations revealed mutations associated with primary hyperoxaluria(8 patients),hypercalciuria(7 patients),and renal malformation due to a WFS1 mutation(1 patient). A positive genetic diagnosis was achieved in 100% of patients with either urinary oxalate > 1 000 μmol/24 h or cystine stones. 8 patients received a diagnosis of hereditary stone disease at their first presentation(non-delayed group),while 13 experienced a mean diagnostic delay of(9.6 ± 3.9)years. The delayed diagnosis group had a significantly older age at initial stone onset[(10.2 ± 5.3)years vs.(6.8 ± 3.1)years, P = 0.03]and a higher incidence of impaired renal function(6 patients vs. 1 patient, P = 0.04). Analysis of diagnostic delay by gene subgroup showed delays in 2/4 patients with cystinuria[ SLC3A1/ SLC7A9;(8.2 ± 3.5)years],5/8 with primary hyperoxaluria[ AGXT/ GRHPR;(10.5 ± 4.1)years],5/7 with hypercalciuria-related genes[ CASR/ ADCY10/ SLC12A1/ KCNJ1/ SLC34A3;(9.8 ± 3.8)years],and 1/2 with other genes[ ATP6V1B1/ WFS1/ CLCN5;(7.6 ± 2.2)years]. Among 32 mutation sites detected,21 were classified as pathogenic/likely pathogenic and 11 as variants of uncertain significance. Four novel mutations were identified: ATP6V1B1(presenting with renal tubular acidosis,nephrocalcinosis,and hypocitraturia), WFS1(presenting with renal malrotation,hydronephrosis,and stones without metabolic abnormalities), SLC12A1(presenting with Bartter syndrome type 1,chronic renal insufficiency,hypercalciuria,hypocitraturia,alkalosis,and hyperaldosteronism),and SLC3A1(presenting with bilateral renal stones and cystinuria). Conclusions:WES is crucial in identifying the underlying etiology of urolithiasis and can guide targeted treatment. We recommend early WES for patients with an initial stone presentation before age 25,those with nephrocalcinosis,or those with abnormal metabolic workups to facilitate precise diagnosis and preventive care.
4.Application of Simple Drawing Line Puncture Combined With Visual Articular Process Arthroplasty Technique in Lateral Foraminoscopy
Xiaoqiang LIU ; Jiayi LUO ; Changwei GU ; Kaixiang LI ; Zhanghua ZHONG ; Xiangjun ZHAO ; Ruibing LI ; Hongwei WANG
Chinese Journal of Minimally Invasive Surgery 2025;25(4):227-232
Objective To explore the application value of simple drawing line puncture combined with visual articular process arthroplasty in lateral foraminoscopy.Methods A retrospective analysis was performed on 89 patients with single-segment lumbar disc herniation treated with lateral foraminoscopy from May 2019 to December 2022,including traditional transforaminal endoscopic spine system(TESSYS)technology(conventional group,35 cases)and simple drawing line puncture combined with visual articular process arthroplasty(modified group,54 cases).The fluoroscopy times,puncture time,and operation time of the two groups were compared.The Visual Analogue Score(VAS),Oswestry Disability Index(ODI),and MacNab criteria were used to evaluate the surgical effect at 3 d after surgery and at the last follow-up.Results All the operations were successfully completed without conversion to open surgery.In the conventional group,there was 1 case of L4 nerve root injury,who was considered intraoperative nerve root compression injury.There was no abnormality in lower limb muscle strength after surgery,but hyperalgesia and numbness in the innervated cutaneous area accompanied by nocturnal cramps.The patient was given treatment with pregabalin,mecobalamin,vitamin B1 and B6 for 2 months,and returned to normal at 1 year of follow-up.The other cases had no complications such as dural injury,abdominal organ injury,or incision infection.Recurrence occurred in 1 case in the conventional group and 2 cases in the modified group,and all the 3 cases occurred within 3 months after operation.Among them,2 patients had severe symptoms and underwent endoscopic revision again,and the other patient improved after conservative treatment.Compared with the conventional group,the puncture times[(1.8±0.7)times vs.(7.5±1.1)times,t=27.543,P=0.000].fluoroscopy times[(5.7±1.8)times vs.(23.2±2.2)times,t=41.235,P=0.000]and operation time[(72.7±7.2)min vs.(92.7±7.7)min,t=12.317,P=0.000]in the modified group were significantly reduced or shortened,and there was no significant difference in postoperative hospital stay[(3.2±0.6)d vs.(3.3±0.6)d,t=0.062,P=0.951]between the two groups.The conventional group was followed up for(14.0±1.3)months and the modified group was followed up for(13.6±1.2)months.There were no significant differences in VAS scores[(1.5±0.6)points vs.(1.6±0.7)points,t=0.751,P=0.455].ODI[(10.8±3.4)%vs.(11.8±3.9)%,t=1.284,P=0.202].and excellent and good rate of MacNab criteria[100%(54/54)vs.100%(35/35),Z=-0.981,P=0.327]between the two groups at the last follow-up.Conclusions Simple drawing line puncture combined with visual articular process arthroplasty can significantly improve the accuracy of intervertebral foramen aspiration,with simple operation,reduced X-ray exposure for doctors and patients,shortened operation time,and improved surgical safety.It is worthy of promotion and application in percutaneous foraminoscopy.
5.The value of whole exome sequencing in the etiological diagnosis and treatment of urolithiasis
Yongli ZHAO ; Changbao XU ; Xiaofu WANG ; Xinyu SHI ; Changwei LIU ; Wuxue LI ; Danhua LIU ; Hongen XU
Chinese Journal of Urology 2025;46(10):739-744
Objective:To evaluate the role of whole exome sequencing(WES)in the etiological diagnosis and precision medicine management of patients with urolithiasis.Methods:We conducted a retrospective review of 21 patients with urolithiasis and pathogenic gene mutations identified by WES at The Second Affiliated Hospital of Zhengzhou University between April 2019 and March 2025. The cohort included 13 males and 8 females,with a mean age of(18.9 ± 11.1)years;18 patients were under 25 years old. Clinical presentations included nephrocalcinosis(8 patients)and urinary tract calculi(13 patients),with five patients exhibiting extra-renal manifestations such as renal tubular acidosis and hyperaldosteronism. Stone composition analysis identified calcium oxalate(16 patients),cystine(4 patients),and carbonate apatite(1 patient). Metabolic abnormalities were prevalent,including hypocitraturia(11 patients),hyperoxaluria(8 patients),and hypercalciuria(7 patients),with eight patients presenting two or more concurrent disorders. All patients underwent WES and comprehensive metabolic evaluation. Sequencing was performed on an Illumina Hiseq4000 platform,achieving a mean depth of > 100× and coverage of > 98% in target regions. Variants were classified according to the American College of Medical Genetics and Genomics(ACMG)guidelines.Results:WES identified 12 distinct genes across autosomal recessive(9 genes: AGXT, GRHPR, ATP6V1B1, SLC12A1, KCNJ1, SLC3A1, SLC7A9, SLC34A3, WFS1),autosomal dominant(2 genes: CASR, ADCY10),and X-linked recessive(1 gene: CLCN5)inheritance patterns. Genotype-phenotype correlations revealed mutations associated with primary hyperoxaluria(8 patients),hypercalciuria(7 patients),and renal malformation due to a WFS1 mutation(1 patient). A positive genetic diagnosis was achieved in 100% of patients with either urinary oxalate > 1 000 μmol/24 h or cystine stones. 8 patients received a diagnosis of hereditary stone disease at their first presentation(non-delayed group),while 13 experienced a mean diagnostic delay of(9.6 ± 3.9)years. The delayed diagnosis group had a significantly older age at initial stone onset[(10.2 ± 5.3)years vs.(6.8 ± 3.1)years, P = 0.03]and a higher incidence of impaired renal function(6 patients vs. 1 patient, P = 0.04). Analysis of diagnostic delay by gene subgroup showed delays in 2/4 patients with cystinuria[ SLC3A1/ SLC7A9;(8.2 ± 3.5)years],5/8 with primary hyperoxaluria[ AGXT/ GRHPR;(10.5 ± 4.1)years],5/7 with hypercalciuria-related genes[ CASR/ ADCY10/ SLC12A1/ KCNJ1/ SLC34A3;(9.8 ± 3.8)years],and 1/2 with other genes[ ATP6V1B1/ WFS1/ CLCN5;(7.6 ± 2.2)years]. Among 32 mutation sites detected,21 were classified as pathogenic/likely pathogenic and 11 as variants of uncertain significance. Four novel mutations were identified: ATP6V1B1(presenting with renal tubular acidosis,nephrocalcinosis,and hypocitraturia), WFS1(presenting with renal malrotation,hydronephrosis,and stones without metabolic abnormalities), SLC12A1(presenting with Bartter syndrome type 1,chronic renal insufficiency,hypercalciuria,hypocitraturia,alkalosis,and hyperaldosteronism),and SLC3A1(presenting with bilateral renal stones and cystinuria). Conclusions:WES is crucial in identifying the underlying etiology of urolithiasis and can guide targeted treatment. We recommend early WES for patients with an initial stone presentation before age 25,those with nephrocalcinosis,or those with abnormal metabolic workups to facilitate precise diagnosis and preventive care.
6.Acute Myocardial Infarction and Syncope Caused by Interarterial Subtype of a Coronary Artery Originating From Anomalous Aorta:a Case Report
Chong PAN ; Chongjian LI ; Quanhe WANG ; Hongzhao YOU ; Changwei WU ; Hongliang ZHANG ; Zhenyan ZHAO ; Fenghuan HU ; Yongjian WU
Chinese Circulation Journal 2024;39(9):917-919
Interarterial subtype of coronary artery with anomalous aortic origin is a rare and congenital cardiovascular malformation,manifested by chest pain and syncope after exertion or activity,which can lead to decreased cardiac contractility,myocardial infarction,and even sudden death.Here we report a case of an adolescent patient,who presented with chest pain during activity accompanied by syncope and lost consciousness.Initially diagnosed with acute myocardial infarction,the patient was subsequently diagnosed as interarterial subtype of a coronary artery originating from anomalous aorta after echocardiography,coronary angiography,coronary CT angiography examinations.After anomalous coronary artery correction and coronary angioplasty,the paitent recovered well.
7.Relationship of serum FAK and F ABP4 levels with myocardial injury and cardiac function in elderly patients with acute myocardial infarction
Chengcheng ZHAO ; Chunpu GUAN ; Changwei HUANG ; Jing LI ; Shikun ZHANG
Chinese Journal of Geriatric Heart Brain and Vessel Diseases 2024;26(3):284-287
Objective To explore the analysis of the relationship of the serum levels of focal adhe-sion kinase(FAK)and fatty acid-binding protein 4(FABP4)with myocardial injury and cardiac function in elderly patients with acute myocardial infarction(AMI).Methods A total of 211 AMI patients admitted to our hospital from January 2020 to April 2023 were enrolled and assigned into the AMI group,while another 60 healthy volunteers who took routine physical examinations in our hospital during the same period served as the control group.The serum FAK and FABP4 lev-els were compared between the two groups.Multivariate logistic regression analysis was employed to identify influencing factors associated with AMI,and ROC curve was plotted to assess the pre-dictive efficacy of the serum FAK and FABP4 levels for AMI in the elderly population.Pearson correlation analysis was conducted to explore the relationship between serum FAK and FABP4 levels and myocardial injury as well as cardiac function.Results The AMI group exhibited signifi-cantly elevated serum FAK,FABP4,CK-MB,cTnⅠ and CK levels,and larger LVESD and LVEDD,but lower LVEF when compared with the control group(P<0.05,P<0.01).For the AMI patients,the serum FAK and FABP4 levels were positively correlated with CK-MB,cTnⅠ and CK levels,as well as LVESD and LVEDD,and negatively with LVEF(P<0.05).Multivariate logistic regression analysis revealed that both serum levels of FAK(OR=2.872,95%CI:2.230-3.698,P=0.000)and FABP4(OR=2.667,95%CI:1.713-4.154,P=0.000)were influencing factors for AMI.ROC analysis indicated that the cut-off value of FAK level for diagnosing AMI was 25.60 pg/L,with an AUC value of 0.801(95%CI:0.750-0.852).Similarly,the cut-off value of FABP4 in the diagnosis was 23.22 pg/L,with an AUC value of 0.760(95%CI:0.707-0.812).Combined FAK and FABP4 levels yielded,with an AUC value of 0.899(95%CI:0.839-0.918).Conclusion Serum FAK and FABP4 levels are abnormally high in the elderly patients with AMI,which is closely related to myocardial injury and cardiac function.The two indicators alone or in combination can effectively predict the occurrence of AMI.
8.Construction and internal validation of a nomogram for predicting the risk of positive prostate biopsy in MRI-negative patients
Xinyu SHI ; Shuo WANG ; Haiyang WEI ; Tianhe ZHANG ; Changwei LIU ; Xiaofu WANG ; Xinghua ZHAO ; Changbao XU
Journal of Modern Urology 2023;28(9):805-809
【Objective】 To establish a nomogram model for predicting the risk of positive prostate biopsy in MRI-negative patients, and to perform the internal validation. 【Methods】 We retrospectively analyzed the clinical data of 197 MRI-negative patients who underwent prostate biopsy at our hospital, analyzed the independent predictors of positive prostate biopsy with univariate and multivariate logistic regression analysis, constructed the nomogram model and conducted internal validation. 【Results】 Multivariate logistic regression analysis showed age (P=0.003), digital rectal examination (DRE)(P=0.005), total prostate-specific antigen (tPSA) (P=0.001) and prostate volume (PV)(P<0.001) were independent risk factors of MRI-negative but prostate biopsy-positive results. The nomogram model based on all variables was established. The area under the receiver operating characteristic (ROC) curve (AUC) was 0.862, which was greater than that of tPSA (AUC=0.739), PV(AUC=0.711) and DRE(AUC=0.666) (all P<0.05). The average absolute error of the model was 1.1% after 500 internal resampling, indicating that the prediction of positive prostate biopsy was consistent with the actual situation. 【Conclusion】 The age, DRE, tPSA and PV were independent predictors of positive prostate biopsy in MRI-negative patients. The nomogram model has a good prediction performance.
9.Effects of feedback teaching based on dynamic cases on teaching quality of practice nurses in the department of neurosurgery
Xuan ZHAO ; Yao WANG ; Changwei SHAO ; Hailin REN ; Chao LIN
Chinese Journal of Medical Education Research 2022;21(11):1584-1587
Objective:To explore the effects of feedback teaching based on dynamic cases on teaching quality of practice nurses in the department of neurosurgery.Methods:A total of 69 practice nurses from the Department of Neurosurgery in the First Affiliated Hospital of Nanjing Medical University were enrolled as the research subjects between January 2019 and August 2020, of which 33 practice nurses between January and October 2019 were selected as the control group and the other 36 practice nurses between November 2019 and August 2020 were selected as the observation group. The control group used routine teaching, while the observation group adopted feedback teaching based on dynamic cases. The assessment scores, practice effect, nursing job satisfaction, and the incidence of nursing errors after teaching were compared between the two groups. SPSS 24.0 was used for Chi-square test and t-test. Results:After teaching, the scores of each assessment (teaching rounds, health education, specialist nursing operations, morning questions, basic operations, and theoretical assessment) in the observation group were significantly higher than those in the control group, and the scores of disease change recognition ability, independent work ability, communication ability and teamwork ability were significantly higher than those in the control group ( P<0.05). After 1 week, 2 weeks, 3 weeks and 4 weeks of teaching, the teaching satisfaction in the observation group was significantly higher than that in the control group ( P<0.05). The total incidence of nursing errors in the observation group 2.78%(1/36) was significantly lower than that in the control group 27.27(9/33)( P<0.05). Conclusion:Feedback teaching based on dynamic cases can effectively improve the teaching quality of practice nurses in the department of neurosurgery, improve nursing job satisfaction, and reduce the risk of nursing errors.
10.Early efficacy comparison of proximal femoral bionic nail and proximal femoral nail anti-rotation in the treatment of intertrochanteric fracture in the elderly
Dong LIN ; Changqing CHEN ; Sheng WANG ; Changwei XIE ; Zhongshuai GUO ; Xinhua CUI ; Ze ZHAO
Chinese Journal of Trauma 2022;38(11):1027-1035
Objective:To compare the early efficacy of proximal femoral bionic nail (PFBN) and proximal femoral nail anti-rotation (PFNA) in the treatment of intertrochanteric fracture in the elderly.Methods:A retrospective cohort study was conducted to analyze the clinical data of 45 elderly patients with intertrochanteric fracture treated at First Affiliated Hospital of Henan Polytechnic University from March 2020 to December 2021, including 13 males and 32 females; aged 70-96 years [(78.6±7.3)years]. According to the AO classification, there were 10 patients with type 31-A1, 16 type 31-A2 and 19 type 31-A3. There were 20 patients treated with PFBN (PFBN group) and 25 with PFNA (PFNA group). The operation time, intraoperaive blood loss, bone healing time, and time to full weight-bearing were compared between the two groups. The tip-apex distance, distance from tail of lag screw to lateral side of intramedllary nail, proximal femoral length and femur neck-shaft angle were compared between the two groups at day 1 postoperatively and at the last follow-up, and their amount of changes between the two time points were also measured. Harris hip score was evaluated at 3, 6 months postoperatively and at the last follow-up. Complications were observed as well.Results:All patients were followed up for 6-21 months [(14.7±3.6)months]. There were no significant differences in operation time, intraoperative blood loss and bone healing time between the two groups (all P>0.05). The time to full weight-bearing was significantly earlier in PFBN group [(7.9±1.2)weeks] than that in PFNA group [(9.1±0.9)weeks] ( P<0.05). At day 1 postoperatively and at last follow-up, the tip-apex distance was (23.4±1.7)mm and (23.3±1.6)mm in PFBN group ( P>0.05), and was (24.5±2.1)mm and (24.3±2.3)mm in PFNA group ( P>0.05); the distance from tail of lag screw to lateral side of intramedllary nail was (8.1±1.1)mm and (11.8±0.9)mm in PFBN group ( P<0.01), and was (7.7±1.0)mm and (12.6±1.6)mm in PFNA group ( P<0.01); the proximal femoral length was (91.3±1.6)mm and (88.5±2.6)mm in PFBN group ( P<0.01), and was (91.4±2.0)mm and (87.6±2.0)mm in PFNA group ( P<0.01); the femur neck-shaft angle was (127.2±2.9)°and (125.7±3.0)° in PFBN group ( P>0.05), and was (128.5±3.0)° and (127.2±3.2)° in PFNA group ( P>0.05). There were no significant differences in the above indicators between the two groups at day 1 postoperatively and at the last follow-up (all P>0.05). The amount of changes in the tip-apex distance and femur neck-shaft angle were (-0.2±0.1)mm and (-1.6±0.7)° in PFBN group, similar with (-0.2±0.2)mm and (-1.5±1.0)° in PFNA group (all P>0.05). However, the amount of changes in the distance from tail of lag screw to lateral side of intramedllary nail and proximal femoral length were (3.6±1.4)mm and (2.7±1.2)mm in PFBN group, significantly lower than (5.2±1.1)mm and (4.0±1.1)mm in PFNA group (all P<0.01). There were no significant differences in Harris hip score between the two groups at 3, 6 months postoperatively or at the last follow-up (all P>0.05). PFBN group had 1 patient with fracture displacement, 2 with compression screw backup and 2 with thigh pain. PFNA group had 1 patient with fracture displacement and 4 with thigh pain. Conclusion:For elderly patients with intertrochanteric fracture, PFBN provides not only earlier full weight-bearing, but also stronger stability of fracture fixation than PFNA.

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