Traditional manual testing of ventilator performance is labor-intensive, time-consuming, and prone to errors in data recording, making it difficult to meet the current demands for testing efficiency in the development and manufacturing of ventilators. Therefore, in this study we designed an automated testing system for essential performance parameters of ventilators. The system mainly comprises a ventilator airflow analyzer, an automated switch module for simulated lungs, and a test control platform. Under the control of testing software, this system can perform automated tests of critical performance parameters of ventilators and generate a final test report. To validate the effectiveness of the designed system, tests were conducted on two different brands of ventilators under four different operating conditions, comparing tidal volume, oxygen concentration, and positive end expiratory pressure accuracy using both the automated testing system and traditional manual methods. Bland-Altman statistical analysis indicated good consistency between the accuracy of automated tests and manual tests for all respiratory parameters. In terms of testing efficiency, the automated testing system required approximately one-third of the time needed for manual testing. These results demonstrate that the designed automated testing system provides a novel approach and means for quality inspection and measurement calibration of ventilators, showing broad application prospects.
Ventilators, Mechanical/standards* ; Equipment Design ; Humans ; Automation

Entamoeba histolytica and Giardia lamblia are two types of parasites that can cause intestinal infections in humans. Patients can be transmitted through the ingestion of food and drinking water contaminated with cysts, and present symptoms such as abdominal pain and diarrhea after infection. If Entamoeba histolytica infection is not actively and effectively treated, patients may also present with clinical manifestations such as purulent and bloody stools and colonic ulcers. This study reports a diarrhea case with concurrent infection of Entamoeba histolytica and Giardia lamblia. During the diagnostic process, the parasites were rapidly detected using the direct saline smear method. Subsequently, iodine staining and iron hematoxylin staining techniques were employed to meticulously observe the internal structures and morphological features of the parasites under a microscope, enabling successful identification of the parasite species. The diagnostic process in this case suggests that laboratory personnel should further enhance their ability to recognize the morphological characteristics of cysts and trophozoites of Entamoeba histolytica and Giardia lamblia, providing an effective basis for the clinical differential diagnosis between Entamoeba histolytica infection and ulcerative colitis.

OBJECTIVE: To explore the genetic etiology for a child presenting with motor retardation, language delay, intellectual disability, and dysmorphic features. METHODS: A child presented at Linyi People's Hospital in June 2022 was selected as the study subject. Clinical data of the child was collected. Peripheral blood samples were obtained from the child and her parents. Following extraction of genomic DNA, whole-exome sequencing (WES) was carried out. Candidate variant was validated by Sanger sequencing. Amniotic fluid samples were obtained from the mother's subsequent pregnancies for prenatal diagnosis. This study has been reviewed and approved by the Medical Ethics Committee of Linyi People's Hospital (Ethics No.: 2019-134). RESULTS: The proband was a 2-year-old girl showing developmental delays in motor, language, and intellectual domains, strabismus, hypertelorism, hearing impairment, obesity, and brachymesophalangy of the fifth finger. Magnetic resonance imaging revealed abnormalities of the white matter. Chromosomal microarray analysis (CMA) identified a 15q26.3 duplication (chr15:101562020_102060896 × 3) inherited from her mother. WES has uncovered a heterozygous c.1931A>G (p.Tyr644Cys) variant in the FBXO11 gene. Sanger sequencing confirmed the variant to be de novo in origin. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), the variant was classified as likely pathogenic. Prenatal diagnosis revealed that the fetuses from the mother's second and third pregnancies did not harbor the same variant. CONCLUSION The c.1931A>G (p.Tyr644Cys) variant of the FBXO11 gene probably underlay the abnormal phenotype in the child. Based on its genotype and phenotype, the proband was diagnosed with Intellectual developmental disorder with dysmorphic facies and behavioral abnormalities.
Humans ; Female ; Intellectual Disability/genetics* ; Child, Preschool ; F-Box Proteins/genetics* ; Protein-Arginine N-Methyltransferases/genetics* ; Exome Sequencing

Objective:To explore the genetic etiology for a child presenting with motor retardation, language delay, intellectual disability, and dysmorphic features.Methods:A child presented at Linyi People′s Hospital in June 2022 was selected as the study subject. Clinical data of the child was collected. Peripheral blood samples were obtained from the child and her parents. Following extraction of genomic DNA, whole-exome sequencing (WES) was carried out. Candidate variant was validated by Sanger sequencing. Amniotic fluid samples were obtained from the mother′s subsequent pregnancies for prenatal diagnosis. This study has been reviewed and approved by the Medical Ethics Committee of Linyi People′s Hospital (Ethics No.: 202402-H-034).Results:The proband was a 2-year-old girl showing developmental delays in motor, language, and intellectual domains, strabismus, hypertelorism, hearing impairment, obesity, and brachymesophalangy of the fifth finger. Magnetic resonance imaging revealed abnormalities of the white matter. Chromosomal microarray analysis (CMA) identified a 15q26.3 duplication (chr15: 101562020_102060896×3) inherited from her mother. WES has uncovered a heterozygous c. 1931A>G (p.Tyr644Cys) variant in the FBXO11 gene. Sanger sequencing confirmed the variant to be de novo in origin. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), the variant was classified as likely pathogenic. Prenatal diagnosis revealed that the fetuses from the mother′s second and third pregnancies did not harbor the same variant. Conclusion:The c. 1931A>G (p.Tyr644Cys) variant of the FBXO11 gene probably underlay the abnormal phenotype in the child. Based on its genotype and phenotype, the proband was diagnosed with Intellectual developmental disorder with dysmorphic facies and behavioral abnormalities.

Porcine hemagglutinating encephalomyelitis virus(PHEV),a betacoronavirus with a sin-gle-stranded,positive-sense RNA genome,is an important pathogen in the swine industry.It causes porcine hemagglutinating encephalomyelitis(PHE),presenting with symptoms such as vomiting,diarrhea,neurological symptoms,and respiratory distress,particularly in piglets.The virus is asso-ciated with high mortality rates and growth stunting in subclinical cases.PHEV has a well-docu-mented global distribution,with occurrences reported across Europe,South America,North Amer-ica,and East Asia,posing a considerable challenge to the swine industry.This review aims to pro-vide a comprehensive overview of PHE's virological characteristics,epidemiology,clinical and pathological manifestations,mechanisms of infection and pathogenicity,and the current state of di-agnostic techniques.It further evaluates advancements in vaccine and antiviral development,along-side comprehensive prevention and control strategies,contextualized within the framework of the latest foundational research.

Objective To explore the therapeutic effect of precise disconnection of pargastric varices guided by endoscopic ultrasound in the treatment of esophagogastric variceal bleeding.Method A retrospective analysis was conducted on 20 patients with cirrhosis esophagogastric variceal bleeding treated with endoscopic ultrasound-guided precise disconnection of pargastric varices from January 1,2024 to December 31,2024.The efficacy was analyzed.Result All 20 patients successfully completed the precise disconnection of pargastric varices under the guidance of endoscopic ultrasound.The injection of tissue gel combined with the placement of spring coils(14 cases)and the injection of tissue gel alone(4 cases)successfully blocked the pargastric varices.All patients did not experience perforation,esophageal and cardia stenosis,massive bleeding,septicemia,or ectopic embolization.One patient who received tissue gel alone had slight bleeding from the pargastric varices after surgery and improved after 3 days of treatment to reduce portal vein pressure.Another one patient who received tissue gel alone had a low-grade fever and normal body temperature after 3 days of anti-infection treatment.Conclusion Precise disconnection of pargastric varices under the guidance of endoscopic ultrasound has a good therapeutic effect on esophagogastric variceal bleeding,with fewer complications such as ectopic embolization,massive bleeding,infection,and perforation.However,close follow-up observation is still needed to address the issue of pargastric varices.

Lens injury is an important etiological factor in the reduction of visual function following ocular trauma.Currently, there are no clear standards for the classification of lens injury, and comprehensive diagnostic tools are lacking.This deficiency leads to numerous controversies and challenges in critical areas, such as diagnosis and preoperative evalution, timing of surgery, surgical strategy, and assessment of postoperative prognosis.Tomographic imaging technology, such as computed tomography, magnetic resonance imaging, optical coherence tomography, has introduced a new dimension to the evaluation of lens injury, which is crucial for assessing the transparency, texture, location, morphology, and integrity of the lens, as well as the zonules and nearby intraocular structures.However, the use of tomographic imaging technology is somewhat limited due to the limitations of relying on a single method.With the ongoing advancement of imaging technologies and the rapid development of big data and artificial intelligence, tomographic imaging will become an increasingly essential tool in the future management of lens injury.Our expert group reviewed the epidemiological characteristics and classification of lens injury and the major challenges currently faced in the diagnosis and treatment of lens injury, and provided expert recommendations mainly focusing on the application, shortcomings and limitations of current tomographic imaging technology in the diagnosis and treatment of lens injury, and future development directions.

Objective:To investigate the prevalence and risk factors of cornea guttata in patients with age-related cataract.Methods:A cross-sectional study was conducted.A total of 1 472 patients aged 50-89 years with complete medical records, who were diagnosed with age-related cataract and to undergo surgery, were enrolled at Peking University People's Hospital from August 2018 to July 2019.The presence of guttata was determined according to the specular microscopy images and the overall prevalence of guttata was calculated, as well as the prevalence rates of different gender, eye, and age distribution.Patients were divided into a guttata group (96 cases 130 eyes) and a non-guttata group (1 376 cases 2 814 eyes), and the differences in general information between groups were compared.The corneal endothelial cell density (CD), coefficient of variation of cell size (CV), fraction of hexagonal cells (6A), axial length (AL), white to white (WTW), anterior chamber depth, and corneal vertex thickness were compared between the two groups, and only the right eye of the patient with both eyes affected was included for analysis.The risk factors of guttata were analyzed by multivariate logistic regression.Differences in influencing factors among different guttata grades were compared, and the differences in biometric parameters of each eye in both eyes of guttata patients were compared.This study adhered to the Declaration of Helsinki, and the study protocol was approved by the Ethics Committee of Peking University People's Hospital (No.2023PHB198-001).Results:Of the 1 472 patients, 96(6.52%) patients had cornea guttata.The prevalence rate of guttata in males was 4.04%, which was significantly lower than 8.20% in females ( χ2=10.058, P=0.002).The average age of patients in the guttata group was (71.19±8.57) years old, with 24 males and 72 females, including 62 patients with monocular guttata and 39 patients with isolated guttata.Multivariate logistic regression analysis showed that female (odds ratio [ OR]=2.124, 95% confidence interval [ CI]: 1.306-3.455), greater AL ( OR=1.201, 95% CI: 1.083-1.332), shallow anterior chamber depth ( OR=0.439, 95% CI: 0.252-0.766), and greater corneal vertex thickness ( OR=1.008, 95% CI: 1.001-1.015) were risk factors for guttata.There were statistically significant differences in the proportion of monocular guttata and biocular guttata among different grades groups, and between isolated guttata and non-isolated guttata ( χ2=25.492, 15.362; both P<0.05).Differences in CD and corneal vertex thickness among different grades groups were statistically significant ( F=3.264, 5.784; both P<0.05).The CD was significanty higher and the corneal vertex thickness was significantly thinner in the grade 1 than in the grade ≥3 (both P<0.017).There was no statistically significant difference in binocular CD, CV, 6A, AL, WTW, anterior chamber depth, and corneal vertex thickness between both eyes of monocular or binocular guttata patients (all P>0.05). Conclusions:The risk factors of guttata include female, long AL, shallow anterior chamber depth, and thick corneal vertex thickness.The guttata grade of monocular guttata and isolated guttata patients is lower.With the increase of grade, the corneal vertex thickness increases.There is no difference in ocular structure between both eyes of guttata patients.

Objective:To screen potential comorbid genes shared between inflammatory bowel disease(IBD)and colorectal cancer(CRC),and to explore the relationship between the key gene a disintegrin and metalloprotease 8(ADAM8)and the pathogenesis of IBD and CRC,as well as the underlying mechanisms.Methods:Transcriptomic data and corresponding clinical information for IBD and CRC were downloaded from the GEO database and TCGA database.Differential expression analysis,prognostic gene screening,and intersection analysis were performed to identify shared genes.Multiple datasets were used to analyze and validate the expression patterns of ADAM8 in IBD and CRC and its correlation with clinicopathological features.Survival analysis was conducted to evaluate the prognostic value of ADAM8 in CRC.Functional and pathway enrichment analyses were conducted to explore the potential mechanisms by which ADAM8 influences CRC progression.The correlation between ADAM8 and tumor microenvironment components was further assessed using tumor microenvironmental algorithms.The database data was validated by detecting the expression in Chinese CRC tissues using immunohistochemistry(IHC).Results:ADAM8 was identified as a potential shared comorbidity gene in IBD and CRC.ADAM8 was significantly upregulated in both IBD and CRC tissues(all P<0.01),and its high expression was associated with disease progression(P<0.01).CRC patients with high ADAM8 expression had shorter overall survival(OS)(P<0.05 or P<0.01).ADAM8 was also significantly highly expressed in Chinese CRC tissues(P<0.01).Pathway analysis revealed that ADAM8 expression was closely linked to immune cell migration,cytokine production,and immune receptor interactions.Additionally,ADAM8 expression positively correlated with immune cell infiltration,including neutrophils and macrophages(P<0.01 or P<0.001).Conclusion:ADAM8 is highly expressed in IBD and CRC tissues and is closely associated with patient prognosis,disease progression,and immune cell infiltration.It holds promise as a common therapeutic target for both diseases.

Objective To analyze the influencing factors of chronic liver failure in patients with primary hepatic carcinoma(PHC)before intervention,and to establish and evaluate a nomogram risk prediction model.Methods A retrospective analysis was conducted by collecting general data and clinical test data within 24 hours of admission for PHC patients.Univariate analysis and Lasso regression were used for variable selection,followed by multivariate logistic regression analysis to identify independent influencing factors for CLF before PHC intervention,leading to the establishment of a nomogram risk prediction model.The model was evaluated using the Hosmer-Lemeshow test,receiver operating characteristic(ROC)curve,calibration curve,clinical decision curve,and clinical impact curve.Result A total of 353 cases of PHC patients were collected,including 153 cases in the liver failure group and 200 cases in the non-liver failure group,with a prevalence rate of 43.3％.Variables selected by Lasso regression included gastrointestinal bleeding,prothrombin time(PT),albumin(ALB),total bilirubin(TBIL),and gamma glutamyl transferase(GGT).Multivariate logistic regression analysis showed that gastrointestinal bleeding(OR=13.549,95％CI:2.899～63.322,P=0.001),PT(OR=1.599,95％CI:1.282～1.995,P＜0.001),TBIL(OR=1.016,95％CI:1.006～1.025,P=0.002),and GGT(OR=1.002,95％CI:1.000～1.003,P=0.028)were independent risk factors for chronic liver failure prior to PHC intervention,leading to the establishment of a nomogram risk prediction model.The Hosmer Lemeshow test showed that the model had a good fit(x2=6.152,P＞0.05);the area under ROC was 0.902(0.869-0.934),with a sensitivity of 80.4％and a specificity of 87.5％.The calibration curve indicated that the model predicts chronic liver failure prior to PHC intervention with good consistency.Clinical decision curve analysis and clinical impact curve analysis showed that the model has good clinical utility within a certain threshold range.Conclusion Gastrointestinal bleeding,PT ≥16.05s,TBIL≥37.80 mmol/L,and GGT≥ 99.00 U/L are independent risk factors for the occurrence of chronic liver failure before PHC intervention.The established nomogram risk prediction model has certain clinical application value in predicting the risk of chronic liver failure before PHC intervention.