Indirect energy metabolism measurement is the gold standard for providing nutritional support for critical illness. The accuracy of the measurement data directly affects the outcome of the disease. In order to study the influence of sampling delay on the accuracy of energy metabolism measurement under mechanical ventilation, the Matlab/Simulink platform and respiratory electrical model were used for simulation and quantitative analysis. The results show that the error of indirect energy metabolism measurement increases with the increase of sampling delay, the error of sampling delay in mechanical ventilation mode is larger than that of spontaneous breathing, and the error of sampling delay in PCV mode of mechanical ventilation is larger than that in VCV mode. Therefore, there should be different sampling delay compensation strategies under severe mechanical ventilation and its different control modes.
Computer Simulation ; Critical Illness ; Energy Metabolism ; Humans ; Respiration, Artificial

ObjectiveNecrotizing fasciitis (NF) has a high rate of deterioration and rapid progress, and the mortality rate is still high even after receiving treatment. The study was to explore evaluation value of serum procalcitonin (PCT), C-reactive protein (CRP) and plasma albumin (ALB) and prealbumin (PA) in the prognosis of patients with perianal necrotizing fasciitis (NF).MethodsAll data and detection data of serum PCT, CRP and plasma ALB, PA at admission from 41 perianal NF patients admitted to Hefei first people's Hospital Group from May 2009 to August 2019 were retrospectively collected. The death status was statistically analyzed. The patients in this group were divided into survival group and non-survival group, and the predictive value of various indicators on the prognosis of NF was evaluated. ResultsThe ratio of male to female was 9.25∶1. There were multiple complications, and diabetes mellitus was most common (41.46%). The patients with mixed infection and negative bacterial culture accounted for 12.20% and 17.07%, respectively. There were many kinds of bacteria detected out. Klebsiella pneumoniae (20.45%), Escherichia coli (15.91%) and streptococcus (15.91%) were common. All underwent one or more surgical treatments, with mortality of 17.07%. There was no significant difference between survival group and death group in gender, complications, microbiological test results, operation status within 6h or and nutrition support (P>0.05), while there were significant differences in time from onset to admission, proportion of patients in ICU, serum PCT and CRP, plasma ALB and PA and proportion of patients undergoing vacuum sealing drainage (VSD) (P<0.05). Logistic multivariate regression analysis showed that long duration from onset to admission, staying in ICU, high serum PCT and CRP, low plasma ALB and PA, and no conducting VSD were risk factors of poor prognosis (P<0.05). Serum PCT, CRP and plasma ALB, PA predict the prognosis receiver operating characteristic(ROC) curve, the area under the curve is 0.859, 0.811, 0.802, 0.747; the area under the curve of the four indicators combined prediction is 0.926.ConclusionThere are certain features in terms of gender, complications and microorganisms in perianal NF patients. Death risk is high. In addition, serum PCT and CRP, plasma ALB and PA are also related with prognosis, which can be applied as biochemical indexes for prognosis evaluation.

Lime sulfur is a common bactericide with strong alkalinity, and is highly corrosive to humans and animals. It is rare for lime sulfur poisoning clinically. This article discusses the clinical manifestations of a patient who was poisoned by oral lime sulfur. After the poisoning, the mucosa of the lips and pharynx broke, fever, and pulmonary inflammation quickly appeared. The pulmonary CT showed slight interstitial changes in both lungs. Through high flow oxygen inhalation, fluid infusion, drainage, maintenance of water and electrolyte balance, protection of important organ functions, and other symptomatic support and treatment, as well as control of blood pressure, blood sugar, maintenance of circulatory function and other targeted measures, the patient's condition gradually improved.
Animals ; Humans ; Calcium Compounds ; Sulfides ; Poisoning

A lung diffusion function detection system is designed. Firstly, the controllable collection of air, test gas source and calibration gas source was based on single-breath method measurement principle. Secondly, pulmonary diffusing capacity for carbon monoxide (D_lCO) was calculated by gas concentration measured by the non-dispersive infrared sensor to measure, the gas flow measured by the differential pressure sensor, and the temperature, humidity and atmospheric pressure sensors to test and evaluate the quantitative detection and evaluation of lung diffusion function. Moreover, a preliminary verification of the lung diffusion function detection system was implemented, and the results showed that the error of the lung carbon monoxide diffusion and the alveolar volume did not exceed 5%. Therefore, the system has high accuracy and is of great value for early screening and accurate assessment of COPD.
Carbon Monoxide ; Lung ; Pulmonary Diffusing Capacity/methods*

Fibronectin extra-domain B (ED-B) has been a good target in new drug development, several relevant antibody drugs are in phase Ⅱ or Ⅲ clinical trials for metastatic melanoma, soft-tissue sarcoma and so on. Some data of phase Ⅱ clinical trials shows that ED-B antibody drugs (L19-IL2 and L19-TNF α) for melanoma are significantly superior to PD-1 antibody drugs. This article describes several aspects of ED-B, such as biological characteristics, the development of targeted drugs, and the potential therapeutic applications, including modifying protein drug structure, constructing fusion protein, expanding indications, developing companion diagnostics and individual treatments. We also discuss how to promote original innovation in drug discovery, which might help to find new development focus.

Non-alcoholic fatty liver disease (NAFLD) is a very common chronic liver disease in clinic, which can further develop into liver fibrosis, cirrhosis, eventually hepatocellular carcinoma and liver failure. Limonin is a natural triterpenoid compound containing furan rings. Previous studies have found that limonin has good anti-inflammatory, analgesic and liver protective functions. However, the mechanism of action of limonin on NAFLD has not been clarified. Based on the background, C57BL/6J male mice were fed with high fat diet (HFD) to establish NAFLD model (the experiment was approved by the Animal Ethics Committee of Hefei University of Technology, the approval number is HFUT20220429001), and limonin was added to the mice for administration by intragastric administration (i.g.). The results showed that HFD can induce typical NAFLD phenotypes, including impaired liver function, increased fat accumulation, and increased serum aspartate amino transferase (AST), alanine transaminase (ALT) and alkaline phosphatase (ALP) levels in mice. Mice were treated with limonin (50 and 100 mg·kg^-1) for 10 weeks, and it was found that limonin could restore dyslipidemia and improve fat accumulation in liver cells of mice. In addition, we conducted in vitro experiments with human hepatoma cell line HepG2 cells, and found that limonin can promote the expression of oxidative metabolism and autophagy related genes and inhibit apoptosis in HepG2 cells. Mechanistically, limonin improves high-fat food-induced NAFLD by promoting the expression of oxidative metabolism genes transcriptional coactivator of peroxisome proliferator activating receptor γ (PPARγ) (PGC1α) and carnitine palmitoyl transferase 1 alpha (CPT1α) through peroxisome proliferator activates receptor alpha (PPARα). These results indicate that limonin can inhibit apoptosis, promote autophagy and improve NAFLD by promoting oxidative metabolism of fatty acids through PPARα.

Objective : To explore the differences of serum inflammatory cytokines and tyrosine kinase with immunoglobulin and epidermal growth factor homology domains⁃2(Tie⁃2) levels between patients with first⁃episode schizophrenia and healthy people , and the correlation with clinical symptoms . Methods : A total of 168 participants were recruited , including 86 patients with first⁃episode schizophrenia (patient group) and 82 healthy people ( control group) . Demographic data , Positive and Negative Symptom Scale (PANSS) and Brief Psychiatric Rating Scale (PANSS) were collected at baseline . Serum inflammatory cytokines and Tie⁃2 levels were determined by MesoScale Discovery (MSD) . Results : Compared with the control group , the levels of serum interleukin (IL) Ⅳ1β and IL⁃4 in the patient group increased (P < 0. 05) , while the level of Tie⁃2 decreased (P < 0. 05) . IL⁃1β level in the patient group was positively correlated with the total score of BPRS , the score of BPRS hostility factor and the score of PANSS positive scale factor (P < 0. 05) . The positive score of PANSS and the total score of BPRS in the patient group had a positive effect on IL⁃1β level (P < 0. 05) . PANSS negative scale factor score , general psychopathological scale factor score and total score of PANSS in patient group also had positive effects on Tie⁃2 level (P < 0. 05) . IL⁃1β level in the patient group could effectively predict the severity of clinical symptoms in patients with first⁃episode schizophrenia at the critical level of 2 127. 076 pg/L , with specificity of 0. 675 and sensitivity of 0. 639 . The AUC of IL⁃1β and Tie⁃2 were 0. 836 1 and 0. 646 2 , respectively . Conclusion The levels of IL⁃1β , IL⁃4 and Tie⁃2 in patients with first⁃episode schizophrenia are different from those in healthy people . IL⁃1β levels in patients with first⁃episode schizophrenia are correlated with part of clinical symptoms . IL⁃1β and Tie⁃2 levels in the patient group may be influencing factors with high sensitivity and specificity in predicting the severity of clinical symptoms in patients with first⁃episode schizophrenia .

Objective To analyze the correlation between detection of influenza pathogenic subtypes and epidemic situation in Hefei City during the surveillance years of 2015-2021, and to provide references for developing influenza prevention and control strategies. Methods The relevant data of influenza-like illness (ILI) surveillance, influenza etiology, and outbreak/cluster outbreaks reported from influenza surveillance sentinel hospitals in Hefei City from 2015 to 2021 in the China Influenza Surveillance Information System were analyzed. The statistical analysis was carried out. Results A total of 3 332 553 outpatient and emergency visits in 2 sentinel hospitals were reported in Hefei City from 2015 to 2021, of which 139,082 were ILI cases, accounting for 4.17%. The monthly proportion ranged from 1.60% to 7.15%. A total of 14 663 ILI specimens were submitted for detection, the submission rate was 10.54%, and the positive rate of influenza virus detection was 11.30%. There was no correlation between the proportion of monthly influenza like cases and the detection rate (r_s=0.176, P=0.107). The composition ratio of each subtype of influenza virus varied greatly, showing diversified seasonality, and the epidemic strains changed constantly. The Victoria subtype (BV subtype) was dominant (40.21%). There was a moderate correlation between the positive rate of ILI in sentinel hospitals and the number of outbreaks per month (r_s=0.696, P=0.000). There was a strong correlation between the monthly number of outbreaks and the detection rate (r_ss=0.696, P=0.000). There was a strong correlation between influenza A virus H3 subtype and BV subtype (r_{s -H3}=0.686, P=0.030; r_{s -BV}=0.632, P=0.000). There was a moderate correlation between the new A1 subtype and B Yamagata subtype (r_{s -new A H1}=0.481, P=0.000 0; r_{s -BY}=0.515, P=0.000). Conclusion There are two epidemic peaks in spring and winter in Hefei. Influenza subtypes are diverse. The results of ILI etiology can predict the outbreaks of different subtypes of influenza. Prediction and surveillance should be used for influenza control and outbreak management in a timely manner.

Abstract This paper summarizes the psychological impacts of passive social media use on adolescents by systematically reviewing the existing domestic and foreign literature about passive social media use. The results showed that the psychological impacts of passive social media use included cognitive outcomes (self concept clarity, self esteem), affective outcomes (depression, anxiety, envy, loneliness), subjective well being (life satisfaction), more types of social media (social short form video), detailed information on forms of passive use, as well as possible impacts (positive psychological, social, and behavioral outcomes) on teenagers and college students should be exlpored by utilizing multiple methods(longitudinal study, the grounded theory) are expected in future studies.

Objective: Stress and cognitive impairment are common postoperative complications in elder patients who have undergone hip surgery. The objective of the work is to evaluate the effects of remimazolam supplemented to combined general anesthesia in improving stress and cognitive performance. Methods: A total of 120 patients were included to receive a low dose of remimazolam (0.1 mg/kg/h) intravenously combined with general anesthesia or general anesthesia alone during hip surgery. Assessments were used for evaluating cognitive and psychological performance respectively before surgery (T0), 24 h (T5), and 72 h (T6) after surgery. Physiological parameters including mean artery pressure, heart rate, and blood oxygen levels (SpO2) were measured at T0, 30 min after anesthesia (T1), and completion of surgery (T2). Stress indexes including serum cortisol and norepinephrine levels were measured at T0, T5, and T6. The visual analog scale pain scores were also acquired at 6 h after surgery, 12 h after surgery, and T6. Serum interleukin-6 and tumor necrosis factor-α levels were acquired at T0, T2, and T6. Results: Heart rate and SpO2 levels in the combination group were significantly improved compared to the control group. Serum cortisol and norepinephrine levels were the highest at T1 and decline over time until T5 in both groups, the two stress indexes of the combination group were significantly lower at T1 and T2. Conclusion Remimazolam supplemented to combined general anesthesia demonstrated significant benefit in reducing stress and cognitive dysfunction in elder patients who underwent hip surgery.