OBJECTIVE To investigate the result of human immunodeficiency virus(HIV)screening for the people visiting to a three-A hospital of Sichuan Province and analyze the prevalence of complications with hepatitis B virus(HBV)infection,hepatitis C virus(HCV)infection and Treponema pallidum(TP)infection in the emerging HIV infection patients.METHODS The result of HIV screening for the people who visited to Ziyang Central Hos-pital from Jan.1,2020 to Dec.31,2024 and the test results of HBV,HCV and TP for the emerging HIV infec-tion patients were collected and were summarized and statistically analyzed by SPSS.0 software.RESULTS Totally 289 891 case-times were tested for HIV,1529 cases were previously diagnosed with HIV,465 of whom were tested posi-tive for the first time,there was significant difference in the positive rate of test for the first time among the 5 years(x2=15.998,P=0.003).Totally 353 cases were confirmed positive among the 465 primary positive screening cases.Among the emerging HIV infection patients,the positive rate was higher in the male than in the female(x2=141.141,P＜0.001),and the positive rate was high among the population aged more than 40 year old(x2=11.448,P＜0.001),mi-grant workers(x2=270.110,P＜0.001)and low education level population(x2=25.911,P＜0.001).The detection rate of gp41 was up to 100.00％in strip type testing.The analysis of the ratio of relative light unit(RLU)to Cutoff val-ue(COI)in the initial screening experiment showed that when COI was greater than 50,all of the confirmed tests were positive,when COI ranged between 1 and 5,the false positive rate was 97.06％.The incidence of complica-tion with HBV infection in the emerging HIV infection patients was increased year by year(x2=20.355,P＜0.001),and the incidence of complication with HCV infection was increased in recent two years(x2=10.690,P=0.030).CONCLUSIONS There is no obvious rise of positive rate of HIV screening among the people visiting to the hospital in recent 5 years.The sensitivity of the primary screening of clinical laboratory is high without posi-tive missing test.The positive rates of HBV and HCV are increased among the emerging HIV infection patients.

Objective:To develop a machine learning prediction model based on peripheral blood indicators for assessing 30-day mortality risk in elderly patients diagnosed with hemophagocytic lymphohistiocytosis (HLH).Methods:A retrospective cohort study was conducted, enrolling elderly patients (age≥65 years) diagnosed HLH at the First Affiliated Hospital of Nanjing Medical University between January 1, 2015, and November 30, 2023. Demographic characteristics, clinical manifestations, and laboratory parameters at admission were collected. The study included 204 elderly HLH patients with a median age of 70 (68-75) years, comprising 134 males (65.69%) and 70 females (34.31%). Using computer-generated random numbers, the data was randomly divided into the training and validation cohorts at a 7∶3 ratio. Based on 30-day survival outcomes, patients in the training cohort were categorized into the death and survivor groups. Predictive variables were screened through univariate analysis and the Boruta algorithm, with prediction models constructed using 11 machine learning algorithms. Model performance was evaluated using the following metrics: area under the receiver operating characteristic curve (AUC), accuracy, sensitivity, specificity, positive predictive value, negative predictive value, F1-score, calibration curve, and decision curve analysis. SHAP analysis was employed for model interpretation.Results:Comparison between the death and survivor groups in the training cohort identified 25 significant indicators ( P<0.05) through univariate analysis. Boruta algorithm-based screening further identified nine predictive variables: urea, ferritin, creatinine (CREA), D-dimer (D-D), platelet (PLT), activated partial thromboplastin time (APTT), aspartate aminotransferase (AST), creatine kinase (CK), and alanine aminotransferase (ALT). Among the 11 algorithms, the top five models by AUC in the training cohort were: XGBoost(AUC=1.000), AdaBoost(AUC=1.000), GBDT(AUC=1.000), DT(AUC=0.967), and RF(AUC=0.945). In the validation cohort, the top five performers by AUC were: RF(AUC=0.812), LR(AUC=0.792), LightGBM(AUC=0.769), AdaBoost(AUC=0.746), and GBDT(AUC=0.742). Thus, the RF model demonstrated optimal performance. SHAP analysis indicated urea as the most significant contributor to prediction outcomes. Conclusion:A machine learning model based on routine laboratory indicators can accurately predict the 30-day mortality risk in elderly HLH patients.

OBJECTIVE To investigate the result of human immunodeficiency virus(HIV)screening for the people visiting to a three-A hospital of Sichuan Province and analyze the prevalence of complications with hepatitis B virus(HBV)infection,hepatitis C virus(HCV)infection and Treponema pallidum(TP)infection in the emerging HIV infection patients.METHODS The result of HIV screening for the people who visited to Ziyang Central Hos-pital from Jan.1,2020 to Dec.31,2024 and the test results of HBV,HCV and TP for the emerging HIV infec-tion patients were collected and were summarized and statistically analyzed by SPSS.0 software.RESULTS Totally 289 891 case-times were tested for HIV,1529 cases were previously diagnosed with HIV,465 of whom were tested posi-tive for the first time,there was significant difference in the positive rate of test for the first time among the 5 years(x2=15.998,P=0.003).Totally 353 cases were confirmed positive among the 465 primary positive screening cases.Among the emerging HIV infection patients,the positive rate was higher in the male than in the female(x2=141.141,P＜0.001),and the positive rate was high among the population aged more than 40 year old(x2=11.448,P＜0.001),mi-grant workers(x2=270.110,P＜0.001)and low education level population(x2=25.911,P＜0.001).The detection rate of gp41 was up to 100.00％in strip type testing.The analysis of the ratio of relative light unit(RLU)to Cutoff val-ue(COI)in the initial screening experiment showed that when COI was greater than 50,all of the confirmed tests were positive,when COI ranged between 1 and 5,the false positive rate was 97.06％.The incidence of complica-tion with HBV infection in the emerging HIV infection patients was increased year by year(x2=20.355,P＜0.001),and the incidence of complication with HCV infection was increased in recent two years(x2=10.690,P=0.030).CONCLUSIONS There is no obvious rise of positive rate of HIV screening among the people visiting to the hospital in recent 5 years.The sensitivity of the primary screening of clinical laboratory is high without posi-tive missing test.The positive rates of HBV and HCV are increased among the emerging HIV infection patients.

Objective:To develop a machine learning prediction model based on peripheral blood indicators for assessing 30-day mortality risk in elderly patients diagnosed with hemophagocytic lymphohistiocytosis (HLH).Methods:A retrospective cohort study was conducted, enrolling elderly patients (age≥65 years) diagnosed HLH at the First Affiliated Hospital of Nanjing Medical University between January 1, 2015, and November 30, 2023. Demographic characteristics, clinical manifestations, and laboratory parameters at admission were collected. The study included 204 elderly HLH patients with a median age of 70 (68-75) years, comprising 134 males (65.69%) and 70 females (34.31%). Using computer-generated random numbers, the data was randomly divided into the training and validation cohorts at a 7∶3 ratio. Based on 30-day survival outcomes, patients in the training cohort were categorized into the death and survivor groups. Predictive variables were screened through univariate analysis and the Boruta algorithm, with prediction models constructed using 11 machine learning algorithms. Model performance was evaluated using the following metrics: area under the receiver operating characteristic curve (AUC), accuracy, sensitivity, specificity, positive predictive value, negative predictive value, F1-score, calibration curve, and decision curve analysis. SHAP analysis was employed for model interpretation.Results:Comparison between the death and survivor groups in the training cohort identified 25 significant indicators ( P<0.05) through univariate analysis. Boruta algorithm-based screening further identified nine predictive variables: urea, ferritin, creatinine (CREA), D-dimer (D-D), platelet (PLT), activated partial thromboplastin time (APTT), aspartate aminotransferase (AST), creatine kinase (CK), and alanine aminotransferase (ALT). Among the 11 algorithms, the top five models by AUC in the training cohort were: XGBoost(AUC=1.000), AdaBoost(AUC=1.000), GBDT(AUC=1.000), DT(AUC=0.967), and RF(AUC=0.945). In the validation cohort, the top five performers by AUC were: RF(AUC=0.812), LR(AUC=0.792), LightGBM(AUC=0.769), AdaBoost(AUC=0.746), and GBDT(AUC=0.742). Thus, the RF model demonstrated optimal performance. SHAP analysis indicated urea as the most significant contributor to prediction outcomes. Conclusion:A machine learning model based on routine laboratory indicators can accurately predict the 30-day mortality risk in elderly HLH patients.

Objective To investigate the application effect of electromagnetic navigation bedside nasoenteral intubation technology in elderly bedridden patients.Methods A total of 92 elderly patients with tube feeding in bed in a tertiary A hospital in Beijing from June 2021 to December 2022 were selected by convenience sampling method,and they were divided into an experimental group and a control group with 46 patients in each group by random number table method.The experimental group adopted the electromagnetic navigation bedside nasoenteral catheterization technique and the control group adopted the blind catheterization method.The total success rate of catheterization,the success rate of the first catheterization,the time taken for catheterization,the proportion of catheter tip reaching jejunum,and the incidence of catheter-related complications were compared between the 2 groups.Results There were no shedding cases in both groups.The success rate of total catheterization was 95.7％in the experimental group and 80.4％in the control group.The success rate of first catheterization was 95.7％in the experimental group and 71.7％in the control group.The time taken for catheterization was(12.37±4.19)min in the experimental group and(19.22±5.48)min in the control group.The proportion of catheter tip reaching the jejunum was 60.9％in the experimental group and 28.3％in the control group.The above data were compared between the 2 groups,and the differences were statistically significant(P＜0.05).In terms of the incidence of catheter-related complications,the incidence of epistaxis in the experimental group was 6.5％and it was 21.7％in the control group,and the difference was statistically significant(P=0.036).The positive rate of fecal occult blood test was 2.2％in the experimental group and 17.4％in the control group,and the difference was statistically significant(P=0.030).There was no significant difference in the incidence of nausea,vomiting and abdominal distension between the 2 groups(P＞0.05).No serious complications such as catheter ectopic placement,pneumothorax and perforation occurred in the 2 groups.Conclusion The application of electromagnetic navigation bedside nasoenteral intubation technology for elderly bedridden patients has a high success rate and takes a short time,which can improve the proportion of catheter tip reaching the jejunum and reduce the incidence of epistaxis and fecal occult blood test.

[This corrects the article DOI: 10.1016/j.apsb.2021.07.006.].

Objective:To investigate the safety and efficacy of short-segment fixation covering the fractured vertebrae via posterior intermuscular approach plus percutaneous kyphoplasty (PKP) through the outer upper edge of the base of the fractured vertebral pedicle in the treatment of osteoporotic thoracolumbar burst fracture.Methods:A retrospective case series study was used to analyze the clinical data of 56 patients with osteoporotic thoracolumbar burst fracture admitted to Ningbo No.6 Hospital from January 2018 to February 2021, including 24 males and 32 females; aged 56-72 years [(63.5±4.6)years]. All patients underwent short-segment fixation covering the fractured vertebrae via posterior intermuscular approach combined with PKP through the outer upper edge of the base of the fractured vertebral pedicle. The operation time, intraoperative blood loss, hospitalization day and surgery-related complications were recorded. The visual analogue score (VAS) of back pain, ratios of the anterior, middle and posterior height of the fractured vertebrae and kyphotic Cobb angle were compared before operation, at postoperative 2 days and at the final follow-up.Results:All patients were followed up for 12-28 months [(14.5±2.2)months]. The operation time was 55-85 minutes [(62.0±12.1)minutes], intraoperative blood loss was 80-150 ml [(94.0±18.5)ml], and hospitalization day was 5-9 days [(7.4±1.1)days]. Based on CT examination at postoperative 2 days, there were 2 patients with paravertebral cement leakage, 2 with intervertebral space leakage and 1 with intracanal leakage, but none reported associated clinical symptoms. No implant failure or fractures of adjacent segments was detected during the follow-up period. The VAS was significantly decreased from preoperative (7.5±1.2)points to (3.2±0.8)points at postoperative 2 days ( P<0.01), and the score was further lowered to (2.2±0.8)points at the final follow-up when compared with that at postoperative 2 days ( P<0.01). The ratios of the anterior, middle and posterior height of the fractured vertebrae and kyphotic Cobb angle were significantly improved at postoperative 2 days [(89.5±13.2)%, (85.8±7.9)%, (89.5±9.0)% and (5.6±3.2)°] when compared with those before operation [(48.9±11.8)%, (61.9±11.9)%, (79.9±9.8)% and (26.3±5.6)°] (all P<0.01). Slight losses were observed in the ratios of the anterior, middle and posterior height of the fractured vertebrae and kyphotic Cobb angle at the final follow-up [(87.0±12.7)%, (82.1±7.8)%, (88.6±10.0)% and (5.4±3.2)°], but not significantly different from those at postoperative 2 days (all P>0.05). Conclusion:Short-segment fixation covering the fractured vertebrae via posterior intermuscular approach plus PKP through the outer upper edge of the base of the fractured vertebral pedicle can safely and effectively treat osteoporotic thoracolumbar burst fracture, for it can significantly improve back pain, restore the height of the fractured vertebrae and correct the kyphotic deformity.

Given the opposing effects of Akt and AMP-activated protein kinase (AMPK) on metabolic homeostasis, this study examined the effects of deletion of Akt2 and AMPKα2 on fat diet-induced hepatic steatosis. Akt2–Ampkα2 double knockout (DKO) mice were placed on high fat diet for 5 months. Glucose metabolism, energy homeostasis, cardiac function, lipid accumulation, and hepatic steatosis were examined. DKO mice were lean without anthropometric defects. High fat intake led to adiposity and decreased respiratory exchange ratio (RER) in wild-type (WT) mice, which were ablated in DKO but not Akt2−/− and Ampkα2−/− mice. High fat intake increased blood and hepatic triglycerides and cholesterol, promoted hepatic steatosis and injury in WT mice. These effects were eliminated in DKO but not Akt2−/− and Ampkα2−/− mice. Fat diet promoted fat accumulation, and enlarged adipocyte size, the effect was negated in DKO mice. Fat intake elevated fatty acid synthase (FAS), carbohydrate-responsive element-binding protein (CHREBP), sterol regulatory element-binding protein 1 (SREBP1), peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α), peroxisome proliferator-activated receptor-α (PPARα), PPARγ, stearoyl-CoA desaturase 1 (SCD-1), phosphoenolpyruvate carboxykinase (PEPCK), glucose 6-phosphatase (G6Pase), and diglyceride O-acyltransferase 1 (DGAT1), the effect was absent in DKO but not Akt2−/− and Ampkα2−/− mice. Fat diet dampened mitophagy, promoted inflammation and phosphorylation of forkhead box protein O1 (FoxO1) and AMPKα1 (Ser485), the effects were eradicated by DKO. Deletion of Parkin effectively nullified DKO-induced metabolic benefits against high fat intake. Liver samples from obese humans displayed lowered microtubule-associated proteins 1A/1B light chain 3B (LC3B), Pink1, Parkin, as well as enhanced phosphorylation of Akt, AMPK (Ser485), and FoxO1, which were consolidated by RNA sequencing (RNAseq) and mass spectrometry analyses from rodent and human livers. These data suggest that concurrent deletion of Akt2 and AMPKα2 offers resilience to fat diet-induced obesity and hepatic steatosis, possibly through preservation of Parkin-mediated mitophagy and lipid metabolism.

Objective To assess the effects of axial spinous process-muscle-vascellum complex transplantation for posterior atlantoarial fusion.Methods Data of 27 cases with altantoarial disease who were treated by posterior atlantoarial fusion using axial spinous process-muscle-vascellum complex transplantation from June 2015 to June 2016 were retrospectively analyzed.There were 19 males and 8 females aged from 9 to 68 years old (mean,41.0±15.4 years old).Two cases were diagnosed with atlanto-axial instability.Fourteen cases were diagnosed with atlas fracture and eleven cases were diagnosed atlanto-axial fracture.All the 27 patients suffered from neck pain or limitations of cervical motion.All patients were assessed clinically by atlantoaxial reduction and bone graft fusion.The pre-operative and post-operative atlanto-dens interval (ADI),visual analogue scale (VAS),Japanese Orthopaedic Association scores (JOA),improvement rate of JOA score and axial symptoms were measured and statistically analyzed.Complications were recorded.Clinical outcome of latest follow-up was evaluated by X-ray and CT scan.Results The time of operation was 2.0-2.5 h and blood loss was 150-300 ml.All the patients were followed-up for 9 to 18 months (mean,11.5±2.1 months).The VAS of neck pain improved from 3.6±2.7 (range,2.0-5.0) pre-operatively to 1.4±0.2 (range,0-2.0) 12 months postoperatively (P=0.000).The JOA score improved from 11.7± 1.9 (range,10.0-15.0) pre-operatively to 15.3±0.6 (range,14.0-17.0)12 months post-operatively (P=0.000).The improvement rate of JOA score at the latest follow-up was 54.1％± 12.4％,including 23 cases (85.19％) excellent,and 4 cases (14.81％) good.The results of axial symptoms were no-symptom in 22 cases (81.48％) and mild symptoms in 5 cases (18.52％).Postoperative cervical spine X-ray and CT showed that the sagittal cervical spine alignment was restored.There was statistically significant difference between ADI of 4.3±1.1 mm (range,3.9-4.5 mm) pre-operatively to 2.5± 0.4 mm (range,2.1-2.6 mm) 12 months post-operatively,which was improved significantly (P=0.000).There were no complications found during the follow-up.Conclusion The application of axial spinous process-muscle-vascellum complex transplantation for posterior atlantoaxial fixation can preserve the dynamic function of muscles and reduce the postoperative pain,as well as avoid donor site morbidity.

Objective To explore the biomechanical properties of posterior occipital condyle screws compared with common occipitocervical fusion internal fixation and it's impacts upon stress of hypoglossal canals.Methods Finite element models based on the occipitocervical CT data of one 28-year-old male healthy volunteer were built,including normal model,instability model,internal fixation model by occipital condyle screws,internal fixation model by occipital plate screws,and internal fixation model by transarticular screws.Fifty N gravity and 1.5 N · m torque were exerted upon the surface of occipital bone so that the models could perform lateral bending,flexion,extension,and rotational motions.The motion range and stress distribution of internal fixation were compared under varying conditions among different occipitocervical fusion models.In addition,the impact of occipital condyle screw upon hypoglossal canals was examined.Results Compared with instability model,the motion range in the internal fixation model by occipital condyle screws declined by 96.8％,95.6％,95.0％ and 98.5％ respectively in lateral bending,flexion,extension and rotation.In the internal fixation by occipital plate screws,the motion range decreased by 96.3％,95.7％,98.4％ and 99.6％ respectively.In the internal fixation by transarticular screws,the motion range exhibited a decline of 95.7％,94.0％,94.3％ and 98.9％,respectively.The stress peaks in the occipital condyle screw were 192.4 MPa,201.6 MPa and 187.6 MPa under lateral bending,flexion,and rotation conditions,respectively.The stress peaks in the occipital plate screw were 279.6 MPa,213.7 MPa,and 154.1 MPa,respectively.The stress peaks in the transarticular screw were 232.4 MPa,220.9 MPa,and 224.5 MPa,respectively.The stress impact peak of occipital condyle screw on the hypoglossal canals wall was 12.96 MPa,and the content deformationunder the hypoglossal canal was 0.64％.Conclusions The occipital condyle screw internal fixation has similar stability with common occipitocervical fusion fixations.The occipital condyle screw has more uniform stress distribution and less effect on the hypoglossal canals,and hence is safe and reliable as anchor point on the cranial side in occipitocervical fusion.