Objective The aim of the study is to establish an automatic method for the recognition of common midges based on artificial intelligence technology.Methods Wing images of three species of midges from Zhuhai port,including Culicoides oxystoma,C.peregrinus,and Lasiohelea taiwanai were subjected to develop a reliable automatic recognition method based on a deep learning method.The VGG convolutional neural network model based on the PaddlePaddle framework and the BP neural network model based on Matlab software with manual design features were involved for image recognition.Results Automatic recognition based on VGG model and BP model were established with the prediction accuracy of the test set in the VGG model and BP model was 100.0%and 94.7%,respectively,with no significant difference(P>0.05).Conclusions The artificial intelligence technology can achieve reliable species recognition based on image recognition of midge wings.

Objective To summarize the epidemiological and clinical features of infectious diseases of the central nervous system(CNS)by a single-center analysis.Methods A retrospective analysis was conducted on the data of 1247 cases of CNS infectious diseases diagnosed and treated in the First Medical Center of PLA General Hospital from 2001 to 2020.Results The data for this group of CNS infectious diseases by disease type in descending order of number of cases were viruses 743(59.6％),Mycobacterium tuberculosis 249(20.0％),other bacteria 150(12.0％),fungi 68(5.5％),parasites 18(1.4％),Treponema pallidum 18(1.4％)and rickettsia 1(0.1％).The number of cases increased by 177 cases(33.1％)in the latter 10 years compared to the previous 10 years(P<0.05).No significant difference in seasonal distribution pattern of data between disease types(P>0.05).Male to female ratio is 1.87︰1,mostly under 60 years of age.Viruses are more likely to infect students,most often at university/college level and above,farmers are overrepresented among bacteria and Mycobacterium tuberculosis,and more infections of Treponema pallidum in workers.CNS infectious diseases are characterized by fever,headache and signs of meningeal irritation,with the adductor nerve being the more commonly involved cranial nerve.Matagenomic next-generation sequencing improves clinical diagnostic capabilities.The median hospital days for CNS infectious diseases are 18.00(11.00,27.00)and median hospital costs are ￥29,500(￥16,000,￥59,200).The mortality rate from CNS infectious diseases is 1.6％.Conclusions The incidence of CNS infectious diseases is increasing last ten years,with complex clinical presentation,severe symptoms and poor prognosis.Early and accurate diagnosis and standardized clinical treatment can significantly reduce the morbidity and mortality rate and ease the burden of disease.

Objective To observe the sedative and analgesic effects of bupivacaine hydrochloride injection combined with neostigmine methylsulfate injection in critically ill patients after general anesthesia operation.Methods Acute and critical patients who were to undergo general anesthesia were randomly divided into control group and treatment group.Two groups received general anesthesia combined with epidural block anesthesia.After operation,the control group was continuously pumped 0.75％bupivacaine hydrochloride injection 45 mL through the epidural catheter,the treatment group was given 2 μg·kg-1 neostigmine methylsulfate injection on the basis of continuous pumping of bupivacaine injection through epidural catheter in the control group.Comparing the pain numerical rating scale(NRS)for 12 h,24 h,48 h,and 72 h of postoperative analgesia and the Ramsay sedation scores(Ramsay),hemodynamic index and safety in the two groups.Results Treatment group were enrolled 32 cases,2 cases dropped out,and 30 cases were finally included in the statistical analysis.Control group were enrolled 32 cases,2 cases dropped out,and 30 cases were finally included in the statistical analysis.The 12-hour Ramsay in the control group and the treatment group were(2.62±0.46)and(2.58±0.51)points;the 24-hour Ramsay were(2.32±0.45)and(2.27±0.39)points;the 48-hour Ramsay were(2.12±0.36)and(2.04±0.32)points;and the 72-hour Ramsay were(1.68±0.34)and(1.57±0.29)points,respectively;the 12-hour NRS were(1.64±0.26)and(1.53±0.28)points;the 24-hour NRS were(2.14±0.37)and(2.23±0.34)points;the 48-hour NRS were(2.57±0.39)and(2.44±0.42)points;the 72-hour NRS were(2.89±0.46)and(2.61±0.51)points,respectively.The NRS score at 72 h after operation in the treatment group was significantly lower than that in the control group(P＜0.05).The 12 h heart rate(HR)in the control group and treatment group were(75.90±6.45)and(75.42±6.24)time·min-1;24 h HR were(76.37±6.28)and(76.43±5.34)times·min-1,48 h HR(78.57±5.14)and(76.95±5.27)time·min-1;72 h HR were(76.49±4.41)and(78.17±4.64)time·min-1,respectively.The 12 h mean arterial pressure(MAP)in the control group and treatment group were(94.34±7.86)and(95.24±7.45)mmHg;24 h MAP were(95.71±7.55)and(96.56±7.29)mmHg;48 h MAP were(96.58±7.36)and(97.64±7.69)mmHg;72 h MAP were(97.63±8.15)and(96.77±8.53)mmHg,respectively the differences of the above indexes between the control group and the treatment group were not statistically significant(all P＞0.05).The extubation time of control group and treatment group were(63.42±16.34)and(59.56±17.27)h,respectively,with no statistical significance(P＞0.05).The adverse drug reactions of two groups were nausea and vomiting,use of rescue analgesics 12 h after surgery,and wound infection.The incidences of postoperative adverse drug reactions in the control group and the treatment group were 26.67％and 23.33％,respectively,with no statistical significance(P＞0.05).Conclusion Bupivacaine hydrochloride injection combined with neostigmine methylsulforte injection can significantly enhance the epidural analgesia effect in acute and critical patients undergoing general anesthesia,and the safety is better.

Objective To observe the sedative and analgesic effects of bupivacaine hydrochloride injection combined with neostigmine methylsulfate injection in critically ill patients after general anesthesia operation.Methods Acute and critical patients who were to undergo general anesthesia were randomly divided into control group and treatment group.Two groups received general anesthesia combined with epidural block anesthesia.After operation,the control group was continuously pumped 0.75％bupivacaine hydrochloride injection 45 mL through the epidural catheter,the treatment group was given 2 μg·kg-1 neostigmine methylsulfate injection on the basis of continuous pumping of bupivacaine injection through epidural catheter in the control group.Comparing the pain numerical rating scale(NRS)for 12 h,24 h,48 h,and 72 h of postoperative analgesia and the Ramsay sedation scores(Ramsay),hemodynamic index and safety in the two groups.Results Treatment group were enrolled 32 cases,2 cases dropped out,and 30 cases were finally included in the statistical analysis.Control group were enrolled 32 cases,2 cases dropped out,and 30 cases were finally included in the statistical analysis.The 12-hour Ramsay in the control group and the treatment group were(2.62±0.46)and(2.58±0.51)points;the 24-hour Ramsay were(2.32±0.45)and(2.27±0.39)points;the 48-hour Ramsay were(2.12±0.36)and(2.04±0.32)points;and the 72-hour Ramsay were(1.68±0.34)and(1.57±0.29)points,respectively;the 12-hour NRS were(1.64±0.26)and(1.53±0.28)points;the 24-hour NRS were(2.14±0.37)and(2.23±0.34)points;the 48-hour NRS were(2.57±0.39)and(2.44±0.42)points;the 72-hour NRS were(2.89±0.46)and(2.61±0.51)points,respectively.The NRS score at 72 h after operation in the treatment group was significantly lower than that in the control group(P＜0.05).The 12 h heart rate(HR)in the control group and treatment group were(75.90±6.45)and(75.42±6.24)time·min-1;24 h HR were(76.37±6.28)and(76.43±5.34)times·min-1,48 h HR(78.57±5.14)and(76.95±5.27)time·min-1;72 h HR were(76.49±4.41)and(78.17±4.64)time·min-1,respectively.The 12 h mean arterial pressure(MAP)in the control group and treatment group were(94.34±7.86)and(95.24±7.45)mmHg;24 h MAP were(95.71±7.55)and(96.56±7.29)mmHg;48 h MAP were(96.58±7.36)and(97.64±7.69)mmHg;72 h MAP were(97.63±8.15)and(96.77±8.53)mmHg,respectively the differences of the above indexes between the control group and the treatment group were not statistically significant(all P＞0.05).The extubation time of control group and treatment group were(63.42±16.34)and(59.56±17.27)h,respectively,with no statistical significance(P＞0.05).The adverse drug reactions of two groups were nausea and vomiting,use of rescue analgesics 12 h after surgery,and wound infection.The incidences of postoperative adverse drug reactions in the control group and the treatment group were 26.67％and 23.33％,respectively,with no statistical significance(P＞0.05).Conclusion Bupivacaine hydrochloride injection combined with neostigmine methylsulforte injection can significantly enhance the epidural analgesia effect in acute and critical patients undergoing general anesthesia,and the safety is better.

BACKGROUND: Patients with atrial fibrillation (AF) and prior stroke history have a high risk of cardiovascular events despite anticoagulation therapy. It is unclear whether catheter ablation (CA) has further benefits in these patients. METHODS: AF patients with a previous history of stroke or systemic embolism (SE) from the prospective Chinese Atrial Fibrillation Registry study between August 2011 and December 2020 were included in the analysis. Patients were matched in a 1:1 ratio to CA or medical treatment (MT) based on propensity score. The primary outcome was a composite of all-cause death or ischemic stroke (IS)/SE. RESULTS: During a total of 4.1 ± 2.3 years of follow-up, the primary outcome occurred in 111 patients in the CA group (3.3 per 100 person-years) and in 229 patients in the MT group (5.7 per 100 person-years). The CA group had a lower risk of the primary outcome compared to the MT group [hazard ratio (HR) = 0.59, 95% CI: 0.47-0.74, P < 0.001]. There was a significant decreasing risk of all-cause mortality (HR = 0.43, 95% CI: 0.31-0.61, P < 0.001), IS/SE (HR = 0.73, 95% CI: 0.54-0.97, P = 0.033), cardiovascular mortality (HR = 0.32, 95% CI: 0.19-0.54, P < 0.001) and AF recurrence (HR = 0.33, 95% CI: 0.30-0.37, P < 0.001) in the CA group compared to that in the MT group. Sensitivity analysis generated consistent results when adjusting for time-dependent usage of anticoagulants. CONCLUSIONS In AF patients with a prior stroke history, CA was associated with a lower combined risk of all-cause death or IS/SE. Further clinical trials are warranted to confirm the benefits of CA in these patients.

Objective: To investigate current use of oral anticoagulant (OAC) therapy and influencing factors among coronary artery disease (CAD) patients with nonvalvular atrial fibrillation (NVAF) in China. Methods: Results of this study derived from "China Atrial Fibrillation Registry Study", the study prospectively enrolled atrial fibrillation (AF) patients from 31 hospitals, and patients with valvular AF or treated with catheter ablation were excluded. Baseline data such as age, sex and type of atrial fibrillation were collected, and drug history, history of concomitant diseases, laboratory results and echocardiography results were recorded. CHA₂DS₂-VASc score and HAS-BLED score were calculated. The patients were followed up at the 3rd and 6th months after enrollment and every 6 months thereafter. Patients were divided according to whether they had coronary artery disease and whether they took OAC. Results: 11 067 NVAF patients fulfilling guideline criteria for OAC treatment were included in this study, including 1 837 patients with CAD. 95.4% of NVAF patients with CAD had CHA₂DS₂-VASc score≥2, and 59.7% of patients had HAS-BLED≥3, which was significantly higher than NVAF patients without CAD (P<0.001). Only 34.6% of NVAF patients with CAD were treated with OAC at enrollment. The proportion of HAS-BLED≥3 in the OAC group was significantly lower than in the no-OAC group (36.7% vs. 71.8%, P<0.001). After adjustment with multivariable logistic regression analysis, thromboembolism(OR=2.48,95%CI 1.50-4.10,P<0.001), left atrial diameter≥40 mm(OR=1.89,95%CI 1.23-2.91,P=0.004), stain use (OR=1.83,95%CI 1.01-3.03, P=0.020) and β blocker use (OR=1.74,95%CI 1.13-2.68,P=0.012)were influence factors of OAC treatment. However, the influence factors of no-OAC use were female(OR=0.54,95%CI 0.34-0.86,P=0.001), HAS-BLED≥3 (OR=0.33,95%CI 0.19-0.57,P<0.001), and antiplatelet drug(OR=0.04,95%CI 0.03-0.07,P<0.001). Conclusion: The rate of OAC treatment in NVAF patients with CAD is still low and needs to be further improved. The training and assessment of medical personnel should be strengthened to improve the utilization rate of OAC in these patients.
Humans ; Female ; Male ; Atrial Fibrillation/drug therapy* ; Coronary Artery Disease/complications* ; Anticoagulants/therapeutic use* ; Platelet Aggregation Inhibitors/therapeutic use* ; Risk Factors ; China ; Administration, Oral ; Stroke

Objective: To investigate the lifespan of erythrocytes in megaloblastic anemia (MA) patients. Methods: A prospective cohort study analysis. Clinical data from 42 MA patients who were newly diagnosed at the Department of Hematology, Lanzhou University Second Hospital from January 2021 to August 2021 were analyzed, as were control data from 24 healthy volunteers acquired during the same period. The carbon monoxide breath test was used to measure erythrocyte lifespan, and correlations between erythrocyte lifespan and laboratory test indexes before and after treatment were calculated. Statistical analysis included the t-test and Pearson correlation. Results: The mean erythrocyte lifespan in the 42 newly diagnosed MA patients was (49.05±41.60) d, which was significantly shorter than that in the healthy control group [(104.13±42.62) d; t=5.13,P=0.001]. In a vitamin B₁₂-deficient subset of MA patients the mean erythrocyte lifespan was (30.09±15.14) d, and in a folic acid-deficient subgroup it was (72.00±51.44) d, and the difference between these two MA subsets was significant (t=3.73, P=0.001). The mean erythrocyte lifespan after MA treatment was (101.28±33.02) d, which differed significantly from that before MA treatment (t=4.72, P=0.001). In MA patients erythrocyte lifespan was positively correlated with hemoglobin concentration (r=0.373), and negatively correlated with total bilirubin level (r=-0.425), indirect bilirubin level (r=-0.431), and lactate dehydrogenase level (r=-0.504) (all P<0.05). Conclusions: Erythrocyte lifespan was shortened in MA patients, and there was a significant difference between a vitamin B₁₂-deficient group and a folic acid-deficient group. After treatment the erythrocyte lifespan can return to normal. Erythrocyte lifespan is expected to become an informative index for the diagnosis and treatment of MA.
Humans ; Longevity ; Clinical Relevance ; Prospective Studies ; Erythrocytes ; Anemia, Megaloblastic ; Folic Acid ; Bilirubin ; Vitamins

Objective: Explore the association between atrial fibrillation (AF) reoccurrence and new-onset ischemic stroke (IS) in patients with nonvalvular AF, and explore whether there is a high-risk period of IS after recurrent episodes of AF. Methods: A nested case-control study design was used. A total of 565 nonvalvular AF patients with new-onset IS after a follow-up of at least 2 years in the China-AF cohort were enrolled as the case group, and 1 693 nonvalvular AF patients without new-onset IS were matched as the control group at a ratio of 1∶3. Frequency and types of recurrent AF in the previous 1 or 2 years were compared between two groups, and the adjusted associations of AF reoccurrence with new onset IS were explored using conditional logistic regression analysis. The proportion of recurrent AF was compared between the case period and control period, and conditional logistic regression analysis was performed to calculate adjusted associations of case-period AF with IS. Results: The nested case-control study design results showed that the proportion of at least one record of recurrent AF in the previous 1 year was higher in the case group than in the control group (72.0% vs. 60.8%, P<0.05), and the recurrent AF was positively correlated with new-onset IS (adjusted OR=1.80, P<0.001). Similar results were also observed in the previous 2 years period. The case-crossover study design analysis showed that among 565 patients with new-onset IS, recurrent AF in the case period was positively correlated with IS (adjusted OR=1.61, P=0.003). Conclusion: Recurrent AF is associated with IS, and there may be a high-risk period of IS after recurrent episodes of AF.
Humans ; Atrial Fibrillation/epidemiology* ; Case-Control Studies ; Cross-Over Studies ; Ischemic Stroke ; China/epidemiology*

Objective: Explore the association between atrial fibrillation (AF) reoccurrence and new-onset ischemic stroke (IS) in patients with nonvalvular AF, and explore whether there is a high-risk period of IS after recurrent episodes of AF. Methods: A nested case-control study design was used. A total of 565 nonvalvular AF patients with new-onset IS after a follow-up of at least 2 years in the China-AF cohort were enrolled as the case group, and 1 693 nonvalvular AF patients without new-onset IS were matched as the control group at a ratio of 1∶3. Frequency and types of recurrent AF in the previous 1 or 2 years were compared between two groups, and the adjusted associations of AF reoccurrence with new onset IS were explored using conditional logistic regression analysis. The proportion of recurrent AF was compared between the case period and control period, and conditional logistic regression analysis was performed to calculate adjusted associations of case-period AF with IS. Results: The nested case-control study design results showed that the proportion of at least one record of recurrent AF in the previous 1 year was higher in the case group than in the control group (72.0% vs. 60.8%, P<0.05), and the recurrent AF was positively correlated with new-onset IS (adjusted OR=1.80, P<0.001). Similar results were also observed in the previous 2 years period. The case-crossover study design analysis showed that among 565 patients with new-onset IS, recurrent AF in the case period was positively correlated with IS (adjusted OR=1.61, P=0.003). Conclusion: Recurrent AF is associated with IS, and there may be a high-risk period of IS after recurrent episodes of AF.
Humans ; Atrial Fibrillation/epidemiology* ; Case-Control Studies ; Cross-Over Studies ; Ischemic Stroke ; China/epidemiology*

Objective: To explore the relationship between fasting blood glucose level and thromboembolism events in patients with non-valvular atrial fibrillation (NVAF). Methods: This was an observational study based on data from a multicenter, prospective Chinese atrial fibrillation registry cohort, which included 18 703 consecutive patients with atrial fibrillation (AF) in 31 hospitals in Beijing from August 2011 to December 2018. Patients were divided into 5 groups according to status of comorbid diabetes and fasting glucose levels at admission: normal blood glucose (normal glucose group), pre-diabetes group, strict glycemic control group, average glycemic control group and poor glycemic control group. Patients were followed up by telephone or outpatient service every 6 months. The primary follow-up endpoint was thromboembolic events, including ischemic stroke and systemic embolism. The secondary endpoint was the composite endpoint of cardiovascular death and thromboembolic events. Kaplan-Meier survival analysis and multifactorial Cox regression were used to analyze the correlation between fasting glucose levels and endpoint events. Results: The age of 18 703 patients with NVAF was (63.8±12.0) years, and there were 11 503 (61.5%) male patients. There were 11 877 patients (63.5%) in normal blood glucose group, 2 023 patients (10.8%)in pre-diabetes group, 1 131 patients (6.0%) in strict glycemic control group, 811 patients in average glycemic control group and 2 861 patients(4.3%) in poor glycemic control group. Of the 4 803 diabetic patients, 1 131 patients (23.5%) achieved strict glycemic control, of whom 328 (29.0%) were hypoglycemic (fasting blood glucose level<4.4 mmol/L at admission). During a mean follow-up of (51±23) months (up to 82 months), thromboembolic events were reported in 984 patients (5.3%). The survival curve analysis of Kaplan Meier showed that the incidence rates of thromboembolic events in normal glucose group, pre-diabetes group, strict glycemic control group, average glycemic control group and poor glycemic control group were 1.10/100, 1.41/100, 2.09/100, 1.46/100 and 1.71/100 person-years, respectively (χ²=53.0, log-rank P<0.001). The incidence rates of composite endpoint events were 1.86/100, 2.17/100, 4.08/100, 2.58/100, 3.16/100 person-years (χ²=72.3, log-rank P<0.001). The incidence of thromboembolic events and composite endpoint events in the other four groups were higher than that in the normal blood glucose group (P<0.001). Multivariate Cox regression analysis showed that compared with normal glucose group, the risk of thromboembolism increased in pre-diabetes group(HR=1.23, 95%CI 1.00-1.51, P=0.049), strict glycemic control group(HR=1.32, 95%CI 1.06-1.65, P=0.013) and poor glycemic control group(HR=1.26, 95%CI 1.01-1.58, P=0.044). Conclusion: Both high or low fasting glucose may be an independent risk factor for thromboembolic events in patients with NVAF.
Aged ; Atrial Fibrillation/complications* ; Blood Glucose/analysis* ; Fasting ; Humans ; Male ; Middle Aged ; Prospective Studies ; Thromboembolism/etiology*