BACKGROUND: Several randomized controlled studies have suggested that the prophylactic use of proton pump inhibitors (PPIs) in intensive care unit (ICU) patients could not reduce the incidence of gastrointestinal bleeding (GIB) and may increase adverse events such as intestinal infection and pneumonia. Gut microbiota may play a critical role in the process. PPIs have been widely prescribed for GIB prophylaxis in patients with acute coronary syndrome (ACS). This study aimed to determine the short-term effects of PPI and histamine-2 receptor antagonist (H2RA) treatment on gut microbiota of ACS patients. METHODS: The study was designed as a single-blind, multicenter, three-parallel-arm, randomized controlled trial conducted at three centers in Beijing, China. We enrolled ACS patients at low-to-medium risk of GIB and randomized (2:2:1) them to either PPI ( n = 40), H2RA ( n = 31), or control group ( n = 21). The primary outcomes were the alterations in gut microbiota after 7 days of acid suppressant therapy. Stool samples were collected at baseline and 7 days and analyzed by 16S ribosomal RNA (rRNA) gene sequencing. RESULTS: There were no significant changes in the diversity of gut microbiota after the short-term use of acid suppressants, but the abundance of Fusobacterium significantly increased and that of Bifidobacterium significantly decreased, especially in PPI users. In addition, the abundance of some pathogenic bacteria, including Enterococcus and Desulfovibrio, was significantly elevated in the PPI users. The fecal microbiota of the PPI users included more arachidonic acid metabolism than that of control group. CONCLUSIONS: PPIs may increase the risk of infection by adversely altering gut microbiota and elevating arachidonic acid metabolism, which may produce multiple proinflammatory mediators. For ACS patients at low-to-medium risk of GIB, sufficient caution should be paid when acid-suppressant drugs are prescribed, especially PPIs. REGISTRATION www.chictr.org.cn (ChiCTR2000029552).
Humans ; Proton Pump Inhibitors/therapeutic use* ; Acute Coronary Syndrome/microbiology* ; Female ; Gastrointestinal Microbiome/drug effects* ; Male ; Middle Aged ; Histamine H2 Antagonists/therapeutic use* ; Aged ; Single-Blind Method

Objective To investigate the serum levels of homocysteine(HCY)and cystatin C(Cys-C)in patients with antineutrophil cytoplasmic antibody(ANCA)-associated vasculitis(AAV)associated renal injury,and to explore the diagnostic value of combined detection of HCY and Cys-C in ANCA-associated renal injury.Methods We selected 70 ANCA-positive patients with renal injury admitted to the Department of Nephrology in our hospital from January 2016 to January 2019.Another 48 patients with ANCA-positive but not complicated with renal injury were in simple ANCA positive group while 50 patients with physical examination who came to the hospital during the same period were in control group.Healthy patients served as the control group.By comparing the differences in the test results of different groups,the area under the curve(AUC)of each test index for ANCA-positive renal injury was determined,and the correlation and diagnostic value of combined detection of HCY and Cys-C for ANCA-related renal injury were calculated.Results The levels of HCY and Cys-C in the ANCA positive combined with renal injury group,the pure ANCA positive group,and the control group differed significantly(P＜0.05).The positive rates of HCY and Cys-C in the two groups were significantly different(P＜0.05).The sensitivity and specificity of HCY and Cys-C in combination for the diagnosis of ANCA-positive related renal injury were significantly higher than those of the above indicators alone(P＜0.05).ROC curve results showed that HCY combined with Cys-C had a better diagnosis for patients with positive ANCA and associated renal injury and a higher correlation.Conclusion HCY combined with Cys-C is closely correlated to ANCA-related renal injury,and the combined detection has a positive effect on the diagnosis of patients with ANCA-positive related renal injury,and has guiding value for the treatment of patients.

Objective:To determine the total and age-specific cut-off values of total prostate specific antigen (tPSA) and the ratio of free PSA divided total PSA (fPSA/tPSA) for screening prostate cancer in China.Methods:Based on the Chinese Colorectal, Breast, Lung, Liver, and Stomach cancer Screening Trial (C-BLAST) and the Tianjin Common Cancer Case Cohort (TJ4C), males who were not diagnosed with any cancers at baseline since 2017 and received both tPSA and fPSA testes were selected. Based on Cox regression, the overall and age-specific (＜60, 60-＜70, and ≥70 years) accuracy and optimal cut-off values of tPSA and fPSA/tPSA ratio for screening prostate cancer were evaluated with time-dependent receiver operating characteristic curve (tdROC) and area under curve (AUC). Bootstrap resampling was used to internally validate the stability of the optimal cut-off value, and the PLCO study was used to externally validate the accuracy under different cut-off values.Results:A total of 5 180 participants were included in the study, and after a median follow-up of 1.48 years, a total of 332 prostate cancer patients were included. In the total population, the tdAUC of tPSA and fPSA/tPSA screening for prostate cancer were 0.852 and 0.748, respectively, with the optimal cut-off values of 5.08 ng/ml and 0.173, respectively. After age stratification, the age specific cut-off values of tPSA in the <60, 60-<70, and ≥70 age groups were 3.13, 4.82, and 11.54 ng/ml, respectively, while the age-specific cut-off values of fPSA/tPSA were 0.153, 0.135, and 0.130, respectively. Under the age-specific cut-off values, the sensitivities of tPSA screening for prostate cancer in males <60, 60-70, and ≥70 years old were 92.3%, 82.0%, and 77.6%, respectively, while the specificities were 84.7%, 81.3%, and 75.4%, respectively. The age-specific sensitivities of fPSA/tPSA for screening prostate cancer were 74.4%, 53.3%, and 55.9%, respectively, while the specificities were 83.8%, 83.7%, and 83.7%, respectively. Both bootstrap's internal validation and PLCO external validation provided similar results. The combination of tPSA and fPSA/tPSA could further improve the accuracy of screening.Conclusion:To improve the screening effects, it is recommended that age-specific cut-off values of tPSA and fPSA/tPSA should be used to screen for prostate cancer in the general risk population.

Objective:To determine the total and age-specific cut-off values of total prostate specific antigen (tPSA) and the ratio of free PSA divided total PSA (fPSA/tPSA) for screening prostate cancer in China.Methods:Based on the Chinese Colorectal, Breast, Lung, Liver, and Stomach cancer Screening Trial (C-BLAST) and the Tianjin Common Cancer Case Cohort (TJ4C), males who were not diagnosed with any cancers at baseline since 2017 and received both tPSA and fPSA testes were selected. Based on Cox regression, the overall and age-specific (＜60, 60-＜70, and ≥70 years) accuracy and optimal cut-off values of tPSA and fPSA/tPSA ratio for screening prostate cancer were evaluated with time-dependent receiver operating characteristic curve (tdROC) and area under curve (AUC). Bootstrap resampling was used to internally validate the stability of the optimal cut-off value, and the PLCO study was used to externally validate the accuracy under different cut-off values.Results:A total of 5 180 participants were included in the study, and after a median follow-up of 1.48 years, a total of 332 prostate cancer patients were included. In the total population, the tdAUC of tPSA and fPSA/tPSA screening for prostate cancer were 0.852 and 0.748, respectively, with the optimal cut-off values of 5.08 ng/ml and 0.173, respectively. After age stratification, the age specific cut-off values of tPSA in the <60, 60-<70, and ≥70 age groups were 3.13, 4.82, and 11.54 ng/ml, respectively, while the age-specific cut-off values of fPSA/tPSA were 0.153, 0.135, and 0.130, respectively. Under the age-specific cut-off values, the sensitivities of tPSA screening for prostate cancer in males <60, 60-70, and ≥70 years old were 92.3%, 82.0%, and 77.6%, respectively, while the specificities were 84.7%, 81.3%, and 75.4%, respectively. The age-specific sensitivities of fPSA/tPSA for screening prostate cancer were 74.4%, 53.3%, and 55.9%, respectively, while the specificities were 83.8%, 83.7%, and 83.7%, respectively. Both bootstrap's internal validation and PLCO external validation provided similar results. The combination of tPSA and fPSA/tPSA could further improve the accuracy of screening.Conclusion:To improve the screening effects, it is recommended that age-specific cut-off values of tPSA and fPSA/tPSA should be used to screen for prostate cancer in the general risk population.

Objective:To investigate the major considerations of domestic orthopaedic trauma surgeons in China when they diagnose and treat Mason type Ⅱ radial head fractures.Methods:A questionnaire survey was conducted from January 15, 2022 to January 16, 2022 using the convenience sampling method among domestic orthopedic trauma surgeons in China. The survey covered the surgeons' basic information, evaluation of Mason type Ⅱ radial head fractures, treatment preferences, and surgical indications recognized.Results:The present survey retrieved 474 eligible questionnaires. 358 surgeons (75.5%, 358/474) believed that the Morrey modified classification for Mason type Ⅱ radial head fracture could properly guide their diagnosis and treatment. 460 surgeons (97.0%, 460/474) believed that diagnosis of the fracture should be based on a combination of elbow X-ray and elbow CT examinations. Young age (80.2%, 380/474), dominant side involvement (66.2%, 314/474), concomitant ipsilateral upper limb injury (78.7%, 373/474), large fracture displacement (67.7%, 321/474), separation of fracture fragments from the main bone (91.6%, 434/474), and fracture involvement area >30% (81.6%, 387/474) were the main factors considered by the orthopedic trauma surgeons when they chose surgical treatment. Large fracture displacement (71.7%, 340/474), especially large articular steps (83.5%, 443/474), separation of fracture fragments from the main bone (75.9%, 360/474), and limited forearm rotation or joint clicking (82.7%, 392/474) found during physical examination were recognized as surgical indications for Mason type Ⅱ fracture by orthopedic trauma surgeons.Conclusion:Domestic orthopedic trauma surgeons in China prefer surgical treatment for Mason type Ⅱ radial head fractures with loss of cortical contact and large displacement, especially large articular steps.

Objective:To investigate the current status and developing trends of study of adult radial head fracture and its treatment.Methods:The literature related to radial head fracture from January 2010 to September 2022 was reviewed through Web of science database. A bibliometric method and visualization software were used to study all the data collected and the 100 most-cited studies related to the treatment of radial head fracture to understand the research status, related cooperation, research trends and research hotspots in the field of adult radial head fracture.Results:A total of 387 studies were included, with a citation frequency of 4,982 times, an average citation frequency of 12.9 times for each study, and an H index of 36. The most studies were published in 2020 (38 studies). The citation frequency increased year by year, reaching the highest (783 times) in 2019. For the 100 most-cited studies, the citation frequency was 2,235 times, and the average citation frequency was 22.4 times for each study. The United States (100 studies), Harvard University (30 studies), Journal of Shoulder and Elbow Surgery (69 studies), and Ring D (19 studies) were, respectively, the most contributing country/region, institution, journal, and author. The country/region, institution, and author that participated the most in the collaboration were, respectively, the United States, Amphia Hospital, and Eygendaal D. Radial head fractures of Mason types Ⅱ and Ⅲ and combined with other elbow fractures and dislocations have attracted the intense attention since 2010. The current research hotspots are combined injuries and radial head prosthesis. Conclusion:Analysis of the bibliometric characteristics of the literature related to adult radial head fracture since 2010 displays the current research status and research hotspots to help following researchers to fully understand the historical development and recent hotspots in the field of adult radial head fracture.

Objective:To analyze the correlation between paraspinal muscle parameters and the angle of degenerative thoracolumbar segmental kyphosis.Methods:From November 2021 to April 2023, a total of 90 female patients with lumbar degenerative disease who underwent surgical treatment in the Department of Spine Surgery, Beijing Jishuitan Hospital were retrospectively analyzed. The average age was 67.62±4.98 years (range, 60-80 years), and the average height was 1.58±0.05 m (range, 1.48-1.70 m). Weight 63.79±9.13 kg (range, 47-90 kg), body mass index 25.48±3.35 kg/m 2 (range, 18.37-36.05 kg/m 2). The angle of kyphosis of the thoracolumbar segments was 6.65°±10.38° (range, -17.34° to 9.34°). Disease diagnosis: 32 cases of lumbar disc herniation and 58 cases of lumbar spinal stenosis. Frontal and lateral radiographs of the thoracolumbar segments in the standing position were taken to measure the angle of kyphosis of the thoracolumbar segments; quantitative CT of the thoracolumbar segments and Osirix software were used to measure the parameters of the paravertebral muscles at the levels of T 12, L 3, and L 5, including paravertebral muscle cross-sectional area, skeletal muscle area, and tissue density, the proportion of fat infiltration, and the height-corrected skeletal muscle area index. The correlation between paraspinal muscle parameters and the angle of thoracolumbar segmental kyphosis was analyzed, and the factors affecting the angle of thoracolumbar segmental kyphosis were analyzed using multiple linear regression. Results:Correlation analysis showed a negative correlation between the angle of thoracolumbar segmental kyphosis and the tissue density of T 12 skeletal muscle ( r=-0.303, P=0.004) and L 5 skeletal muscle ( r=-0.219, P=0.038). Age was negatively correlated with T 12 skeletal muscle tissue density ( r=-0.263, P=0.012), T 12 height-corrected skeletal muscle area index ( r=-0.221, P=0.036), T 12 paravertebral muscle cross-sectional area ( r=-0.280, P=0.007), L 3 skeletal muscle tissue density ( r=-0.266, P=0.011) and L 5 skeletal muscle tissue density ( r=-0.290, P=0.006). There was no correlation between bone mineral density and paravertebral muscle parameters ( P>0.05). Multiple linear regression showed that T 12 skeletal muscle tissue density ( β=-1.125, P<0.001), T 12 fat-infiltrated proportion ( β=-0.849, P=0.001), L 3 skeletal muscle tissue density ( β=0.996, P<0.001), and L 3 fat-infiltrated proportion ( β=0.496, P=0.020) were independent factors influencing the angle of thoracolumbar segmental kyphosis . Conclusion:T 12 and L 3 paraspinal muscle density and fat-infiltrated proportion are independent factors affecting the angle of thoracolumbar kyphosis. The smaller the density and fat-infiltrated proportion of T 12 paraspinal muscle, and the larger the density and fat-infiltrated proportion of L 3 paraspinal muscle, the larger the angle of thoracolumbar kyphosis.

Objective:To evaluate the precision of robot-assisted axis pedicle screw placement and to evaluate the factors influencing the accuracy of the placement.Methods:The medical records of 27 consecutive patients who underwent posterior internal fixation of the upper cervical spine for atlantoaxial instability with intraoperative robot-assisted axis pedicle screw placement from January 2017 to December 2020 at Beijing Jishuitan Hospital were retrospectively analyzed. T The cohort comprised 10 males and 17 females, aged 41.3±16.6 years (range 12-75 years), with a body mass index (BMI) of 23.0±2.9 kg/m 2 (range 18.9-30.0 kg/m 2). There were 16 cases of traumatic atlantoaxial instability and 11 cases of atlantoaxial instability caused by deformity. The accuracy of robot-assisted axis pedicle screw placement was evaluated by postoperative CT using Gertzbein-Robbins scale. Factors potentially affecting placement accuracy were initially identified via univariate analysis, with significant factors ( P<0.200) subsequently analyzed through multivariate modeling using generalized estimating equations. Results:A total of 49 axis pedicle screws were placed in 27 patients, with 35 (71.4%) in Gertzbein-Robbins scale grade A, 12 (24.5%) in grade B, 2 (4.1%) in e grade C, and 0 in grades D and E. The clinically acceptable rate (Gertzbein-Robbins grades A and B) was 95.9%. No patient experienced vascular or neurologic injury due to screw displacement. The results of univariate analysis showed no statistical significance for patient factors (age, gender, BMI, preoperative cervical curvature, and causes of atlantoaxial instability); no statistical significance for the surgical factors of tracker position, screw position, screw type, and screw placement approach ( P>0.05), and a statistically significant difference for the difference between the effective width of the axis pedicle and the screw diameter ( t=3.484, P<0.001). The results of multifactorial analysis showed that tracker fixation to the Mayfield frame in robot-assisted axis pedicle screw placement over the axis spinous process resulted in more accurate screw placement [ OR=83.231, 95% CI(3.898, 1776.952), P=0.005]; and the greater the difference between the effective width of the axis pedicle and the diameter of the screw, the greater the accuracy of screw placement [ OR=5.330, 95% CI(1.648, 17.243), P=0.005]. Conclusion:Robot-assisted axis pedicle screw placement is both precise and safe. Securing the tracker to the Mayfield clamp rather than the axis spinous process enhances the accuracy of screw placement. A greater discrepancy between the axis pedicle's effective width and the screw diameter decreases the likelihood of cortical violation. Preoperative planning, including the selection of appropriate screw types and adjusting the trajectory in three dimensions to maximize the difference between the pedicle's effective width and the screw diameter, can mitigate the risk of cortical breach and subsequent vascular and neurological injury.

Objective To monitor the susceptibility of clinical isolates to antimicrobial agents in tertiary hospitals in major regions of China in 2022.Methods Clinical isolates from 58 hospitals in China were tested for antimicrobial susceptibility using a unified protocol based on disc diffusion method or automated testing systems.Results were interpreted using the 2022 Clinical &Laboratory Standards Institute(CLSI)breakpoints.Results A total of 318 013 clinical isolates were collected from January 1,2022 to December 31,2022,of which 29.5％were gram-positive and 70.5％were gram-negative.The prevalence of methicillin-resistant strains in Staphylococcus aureus,Staphylococcus epidermidis and other coagulase-negative Staphylococcus species(excluding Staphylococcus pseudintermedius and Staphylococcus schleiferi)was 28.3％,76.7％and 77.9％,respectively.Overall,94.0％of MRSA strains were susceptible to trimethoprim-sulfamethoxazole and 90.8％of MRSE strains were susceptible to rifampicin.No vancomycin-resistant strains were found.Enterococcus faecalis showed significantly lower resistance rates to most antimicrobial agents tested than Enterococcus faecium.A few vancomycin-resistant strains were identified in both E.faecalis and E.faecium.The prevalence of penicillin-susceptible Streptococcus pneumoniae was 94.2％in the isolates from children and 95.7％in the isolates from adults.The resistance rate to carbapenems was lower than 13.1％in most Enterobacterales species except for Klebsiella,21.7％-23.1％of which were resistant to carbapenems.Most Enterobacterales isolates were highly susceptible to tigecycline,colistin and polymyxin B,with resistance rates ranging from 0.1％to 13.3％.The prevalence of meropenem-resistant strains decreased from 23.5％in 2019 to 18.0％in 2022 in Pseudomonas aeruginosa,and decreased from 79.0％in 2019 to 72.5％in 2022 in Acinetobacter baumannii.Conclusions The resistance of clinical isolates to the commonly used antimicrobial agents is still increasing in tertiary hospitals.However,the prevalence of important carbapenem-resistant organisms such as carbapenem-resistant K.pneumoniae,P.aeruginosa,and A.baumannii showed a downward trend in recent years.This finding suggests that the strategy of combining antimicrobial resistance surveillance with multidisciplinary concerted action works well in curbing the spread of resistant bacteria.

Objective To investigate the distribution and antimicrobial resistance profiles of the common pathogens isolated from urine from 2015 to 2021 in the CHINET Antimicrobial Resistance Surveillance Program.Methods The bacterial strains were isolated from urine and identified routinely in 51 hospitals across China in the CHINET Antimicrobial Resistance Surveillance Program from 2015 to 2021.Antimicrobial susceptibility was determined by Kirby-Bauer method,automatic microbiological analysis system and E-test according to the unified protocol.Results A total of 261 893 nonduplicate strains were isolated from urine specimen from 2015 to 2021,of which gram-positive bacteria accounted for 23.8％(62 219/261 893),and gram-negative bacteria 76.2％(199 674/261 893).The most common species were E.coli(46.7％),E.faecium(10.4％),K.pneumoniae(9.8％),E.faecalis(8.7％),P.mirabilis(3.5％),P.aeruginosa(3.4％),SS.agalactiae(2.6％),and E.cloacae(2.1％).The strains were more frequently isolated from inpatients versus outpatients and emergency patients,from females versus males,and from adults versus children.The prevalence of ESBLs-producing strains in E.coli,K.pneumoniae and P.mirabilis was 53.2％,52.8％and 37.0％,respectively.The prevalence of carbapenem-resistant strains in E.coli,K.pneumoniae,P.aeruginosa and A.baumannii was 1.7％,18.5％,16.4％,and 40.3％,respectively.Lower than 10％of the E.faecalis isolates were resistant to ampicillin,nitrofurantoin,linezolid,vancomycin,teicoplanin and fosfomycin.More than 90％of the E.faecium isolates were ressitant to ampicillin,levofloxacin and erythromycin.The percentage of strains resistant to vancomycin,linezolid or teicoplanin was＜2％.The E.coli,K.pneumoniae,P.aeruginosa and A.baumannii strains isolated from ICU inpatients showed significantly higher resistance rates than the corresponding strains isolated from outpatients and non-ICU inpatients.Conclusions E.coli,Enterococcus and K.pneumoniae are the most common pathogens in urinary tract infection.The bacterial species and antimicrobial resistance of urinary isolates vary with different populations.More attention should be paid to antimicrobial resistance surveillance and reduce the irrational use of antimicrobial agents.