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 investigate the levels and clinical significance of serum microRNA(miR)-651 and miR-630 in patients with cervical cancer.Methods From June 2017 to May 2020,108 cervical cancer patients accepted by our hospital were collected as the cervical cancer group.Meantime,100 cervical intraepithelial neoplasia(CIN)patients treated in our hospital were regarded as the CIN group,and 110 healthy individuals who underwent physical examination were regarded as the control group.Real-time fluorescence quantitative PCR(qRT-PCR)was applied to detect serum levels of miR-651 and miR-630,while analyzing the relationship between serum miR-651 and miR-630 as well as clinical features and prognosis of patients.Results The serum levels of miR-651 and miR-630 in the cervical cancer group and CIN group were obviously lower than those in the control group(P<0.05),while the serum levels of miR-651 and miR-630 in the cervical cancer group were obviously lower than those in the CIN group(P<0.05).The expression levels of serum miR-651 and miR-630 were positively corre-lated(r = 0.542,P<0.05).The serum levels of miR-651 and miR-630 were related to HPV infection,differentia-tion,lymph node metastasis,and FIGO staging(P<0.05).The overall survival rate of patients with low levels of miR-651 and miR-630 was lower than that of patients with high levels.Cox regression analysis showed that,HPV infection,degree of differentiation,lymph node metastasis,FIGO staging,miR-651,and miR-630 were all influ-encing factors for the prognosis of cervical cancer patients(P<0.05).Conclusion The serum levels of miR-651 and miR-630 in cervical cancer patients decrease,which are related to HPV infection,differentiation,lymph node metastasis,FIGO staging,and prognosis.

Objective:To investigate the incidence and mortality of breast cancer in tumor registration areas of Shanxi Province in 2019.Methods:A cross-sectional study was conducted. The tumor registration data reported by 13 tumor registration areas in Shanxi Province in 2019 were collected, and the overall incidence and mortality of breast cancer were analyzed. The stratified analysis was conducted by gender and region, and the incidence, mortality, accumulation rate (0-74 years old), age-specific incidence rate, age-specific mortality rate, Chinese population standardized rate and world population standardized rate were calculated. The standard population was based on the 2000 China population census standard population composition and Segi world standard population composition.Results:In 2019, there were 871 new cases of breast cancer in the tumor registration areas of Shanxi Province, with an incidence rate of 17.83/100 000, and 202 deaths, with a mortality rate of 4.13/100 000. The age-specific incidence of breast cancer was at a low level in 0-25 years old, it increased rapidly after 30 years old, and reached a peak in people aged 60 years old. The age-specific mortality showed a slow rising trend with the increase of age, and increased rapidly in people over 75 years old. The age-specific incidence and mortality of breast cancer in female were higher than those in male. Although the general trend of change concerning urban and rural age-specific incidence was similar, the trend of change concerning urban and rural age-specific mortality had their own characteristics. In 4 urban tumor registration areas, the highest male and female Chinese population standardized incidence rates were found in Yuci District of Jinzhong City (0.62/100 000) and Yangquan City (41.86/100 000). Male Chinese population standardized mortality rate was 0/100 000, and the highest female Chinese population standardized mortality rate was found in Yangquan City (12.62/100 000). In 9 rural tumor registration areas, the highest male and female Chinese population standardized incidence rates were found in Jishan County (2.59/100 000) and Pingding County (36.42/100 000). The highest Chinese population standardized mortality rates were found in Yuanqu County (0.89/100 000) and Jishan County (4.82/100 000).Conclusions:Women, urban area people and middle-aged and elderly people are the foci of breast cancer prevention and control in Shanxi Province.

Objective:To explore expression and prognostic value of oncostatin M(OSM)in endometrial cancer and to analyze relationship between OSM expression and immune cell infiltration in endometrial cancer tissues.Methods:OSM expression in pan-can-cer was analyzed by TIMER database,OSM expression in endometrial cancer and normal tissues was compared,and survival analysis for patients with different OSM expression was performed;relationship between OSM expression and immune cell infiltration was analyzed by TIMER and TISIDB,and ssGSEA algorithm was used to calculate difference in abundance of immune cell infiltration in samples with different OSM expression;GSEA software was applied to perform enrichment analysis;clinical tissue samples were collected for validation.Results:OSM expression was higher in endometrial cancer tissues than that in normal endometrial tissues(P=4.1e-28),and endometrial cancer patients with high OSM expression had prolonged recurrence-free survival(RFS)(P=0.004 8).OSM expression was positively correlated with abundance of immune cell infiltration and genetic markers of immune cells(P<0.05).OSM was mainly enriched in immune-related signaling pathways.OSM expression was higher in endometrial cancer tissues than normal and atypical hyperplastic tissues(P=0.016 9).Proportions of immune cell markers CD4,CD8,and CD68 were increased in tumor tissues with high OSM expression(all P<0.05),which were positively correlated with OSM expression.Conclusion:OSM is highly expressed in endometrial cancer tissues and correlated with prognosis;OSM expression is positively correlated with immune cell infiltration level and can be used as a biomarker for immunotherapy and prognosis.

ObjectiveTo establish the fingerprint of seven commercially available Yangyin Qingfei preparations， to quantitatively analyze the index components， to evaluate their quality uniformity with multivariate statistical analysis， and to explore the quality differences among different dosage forms. MethodA total of 33 batches of commercially available 7 kinds of Yangyin Qingfei preparations were analyzed by high performance liquid chromatography（HPLC）， the fingerprints were established and the common peaks were identified. Paeoniflorin， verbascoside， harpagoside， glycyrrhizic acid and paeonol were selected as the indicators of quality attributes to quantitatively analyze 33 batches of preparations. Based on the administration methods of Yangyin Qingfei preparations， the daily intake was calculated and the radar charts were poltted， and cluster analysis and principal component analysis were used to explore the quality differences of 7 kinds of Yangyin Qingfei preparations and the quality uniformity among different batches of the same dosage form. ResultThe similarity of fingerprints of 7 dosage forms was 0.248-0.956， suggesting that there were significant differences among different dosage forms of Yangyin Qingfei preparations， and a total of 15 common peaks were calibrated， of which peak 7， peak 8， peak 11， peak 13 and peak 15 were paeoniflorin， verbascoside， harpagoside， glycyrrhizic acid and paeonol， respectively. The radar plots showed that the average total daily intake of large honeyed pills and water honeyed pills was the highest， and the uniformity of pill components was better. The quality of 33 batches of samples was divided into poor quality and high quality by cluster analysis. Principal component analysis showed that the uniformity and dosage form of different dosage forms were significantly different， the oral liquid had the best quality homogeneity with the minimum dispersion. And the content of paeonol in different dosage forms was significantly different， which was the key component of quality control of Yangyin Qingfei preparations. ConclusionYangyin Qingfei large honeyed pills and water honeyed pills show high content and good uniformity， which are relatively preferred dosage forms. Different preparation processes have a great influence on the content of paeonol， and its quality control should be emphasized during production. This study provides a scientific method for the comparison of product quality of different dosage forms of traditional Chinese medicine prescriptions， which is helpful for the development of preferred dosage forms of different prescriptions， and provides a reference for efficient use of medication in the clinical practice.

ICU acute respiratory distress syndrome has a high morbidity and mortality rate, and these patients usually need mechanical ventilation to maintain their respiratory function during treatment. However, improper setting of mechanical ventilation parameters may lead to ventilator-induced lung injury (VILI). In order to effectively prevent the occurrence of VILI, ARDSnet recommends the use of a protective ventilation strategy with low tidal volume and limited airway plateau pressure. However, from the perspective of ventilator energy transfer, VILI is actually the result of a combination of respiratory parameters such as tidal volume, airway pressure, and respiratory rate. The mechanical power well reflects the combined effect of the above parameters and is increasingly becoming a hot topic in clinical research. In this review paper, the definitions of mechanical energy and mechanical power were introduced, and the calculation methods of mechanical power under different respiratory modes are summarized. Moreover, the clinical studies related to mechanical power and VILI and further exploration of the safety threshold of mechanical power are reviewed. It is expected to provide new ideas for the future clinical development of personalized mechanical ventilation strategies and the effective prevention of VILI.

Objective:To evaluate the performance of rural practitioners of endoscopic cleaning and disinfection participating in the Early Diagnosis and Treatment Program for Upper Gastrointestinal Cancers and to analyze the influencing factors.Methods:The questionnaires for skill assessment were designed based on the skill scheme and clinical practice of the Early Diagnosis and Treatment Program for Upper Gastrointestinal Cancers in rural China, and the App Early diagnosis, Early treatment was used as the examination platform. The practitioners in 539 county hospitals from 25 provinces participating in the program in 2019 were assessed for techniques and skills for endoscopic cleaning and disinfection and the excellence rate was calculated. Multivariate logistic regression model was used to analyze the influencing factors for the examination. Results:A total of 1 671 endoscopic cleaning and disinfection practitioners participated in the assessment with the score of 73.41±16.60. The passing rate was 85.82%, and the excellence rate was 44.94%. Among all questions, the correct rate of "opportunistic screening flow chart" was the highest (98.21%), and that of "the evaluation index for mass screening" was the lowest (57.89%). The multivariate logistic regression analysis showed that the excellence rate was high in practitioners who had a bachelor degree or above ( OR=1.627,95% CI:1.319-2.007, P<0.001), the career for 5 to <15 years (5 to <10 years: OR=1.329,95% CI:1.045-1.689, P=0.020; 10 to <15 years: OR=1.384,95% CI:1.026-1.867, P=0.033), working in eastern and central regions (eastern regions: OR=3.476,95% CI:2.368-5.103, P<0.001;central regions: OR=4.028,95% CI:2.679-6.057, P<0.001) and with full understanding of the screening scheme ( OR=1.547,95% CI:1.246-1.921, P<0.001) . Conclusion:Practitioners on the Early Diagnosis and Treatment Program for Upper Gastrointestinal Cancers in rural China have mastered the basic screening scheme and skills for endoscopic cleaning and disinfection. The education background, duration of the career, area and understanding of screening scheme are influencing factors for the excellence rate of endoscopic cleaning and disinfection.

Objective:To evaluate the efficacy and safety of standardized dust mite allergen subcutaneous immunotherapy (SCIT) in children with allergic rhinitis (AR) during treatment.Methods:A total of 283 children with AR diagnosed with definite dust mite allergy and completed 2 to 3 years of SCIT who attended the Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, from August 2019 to October 2021 were included, including 205 males and 78 females, with a mean age of 10.8 years. The total nasal symptoms score (TNSS), symptom medication score (SMS), rhinoconjunctivitis quality of life questionnaire (RQLQ) and visual analogue scale (VAS) before and after 2 to 3 years′ treatment were recorded, and the differences before and after treatment were compared. Adverse reactions during SCIT were recorded to evaluate its safety. SPSS 22.0 software was used for statistical analysis.Results:The overall effectiveness rate during SCIT in 283 children with AR was 89.4% (253/283). Compared with baseline, all symptom scores, medication scores and quality of life scores were significantly lower after 2 to 3 years of SCIT (all P<0.05). Further group comparisons showed positive efficacy in patients with different clinical characteristics, including age, gender, smoking status, family history of AR, symptom severity, mono-or poly-allergy, and second immunization, with no statistically significant differences between groups (all P>0.05). A total of 12 735 injections were administered during the SCIT, and a total of 213 (1.67%) injections of local adverse reactions occurred, mainly in the initial treatment phase, and the diameter of the local air mass was mostly 5 to 20 mm; 71 (0.56%) injections of systemic adverse reactions occurred, mainly in the initial treatment phase, and most of them were grade 1 reactions with no serious systemic adverse reaction such as shock. Conclusion:Standardized dust mite SCIT has a good safety profile and definite efficacy in treating AR children with different clinical characteristics. It can significantly improve all symptoms, reduce the use of symptomatic drugs and improve their quality of life.

Objective:To investigate the efficacy and safety of dermal anchoring method combined with low energy electron beam irradiation in the removal of chest wall keloids.Methods:Clinical data of patients with medium and large-sized chest wall keloids treated in Plastic Surgery Department of Sun Yat-sen Memorial Hospital of Sun Yat-sen University from May 2015 to May 2021 were analyzed retrospectively. The keloid was completely removed from the superficial fascia layer, and a small patch of scar dermis tissue was retained in the center of the keloid. When the cutting edge was sutured, the above-mentioned dermis tissue was anchored to achieve tension reduction. Then low energy electron beam irradiation treatment was carried out within 24 h after surgery, with an irradiation range of 5-10 mm from the incision edge and a subcutaneous depth of 2 cm. The lesions were irradiated for 3 times, with a 24 h interval between each exposure. The total irradiation dose was 20 Gy. The width, severity of hyperplasia (expressed in height), and recurrence of keloids at 3, 6, and 12 months after surgery were recorded. Patient satisfaction was evaluated one year after surgery (with a total score of 10 points, 0-3 points of dissatisfaction, 4-7 points of general satisfaction, 8-10 points of great satisfaction), and the incidence of radiation complications was observed. SPSS 25.0 software was used for statistical analysis of the data, with measurement data represented by Mean±SD. Repeated measurement analysis of variance was conducted for the same variable at different periods, and counting data was represented by %. χ2 test was used for group comparison. P<0.05 indicated the difference with statistical significance. Results:A total of 39 patients with 39 scars were included. There were 15 males and 24 females, aged (30.9±9.5) years. The preoperative scar width was (43±5) mm (rang 38-48 mm), and the scar volume was 20.0 mm×38.0 mm×7.5 mm-80.0 mm×48.0 mm×1.6 mm. After the surgery, the wound showed a mild protrusion with minimal exudation, and the wound was dry and clean after irradiation. The scar width at 3, 6, and 12 months after surgery was (1.3±0.5), (1.8±0.5), and (2.9±0.5) mm, respectively, with statistically significant difference ( P<0.01); the severity of scar hyperplasia was (0.9±0.3), (1.3±0.3), and (1.8±0.3) mm, with statistically significant difference ( P<0.01); the recurrence rates of keloids were 12.8% (5 cases), 23.1% (9 cases), and 25.6% (10 cases), respectively, with no statistically significant difference ( P>0.05). The patient satisfaction score at 1 year after surgery was 2-10, average of 7. There were 4 cases (10%) of dissatisfaction, 10 cases (26%) of general satisfaction, 25 cases (64%) of great satisfaction. No radiotherapy complications occurred. Conclusion:Dermal anchoring method combined with low energy electron beam irradiation can achieve good therapeutic effects in the removal of chest wall keloids. The recurrence rate of keloids is low, and patient satisfaction is high.