Objective To propose a new spectrophotometric method for determination of trace formaldehyde. Methods The method was based on the sensitive effect of formaldehyde in the system of cobaltous sulfate with ethylenediamine in sulfuric acid medium. Results The stable system of cobaltous sulfate with ethylenediamine could be kept seven days at least. Formaldehyde in the linear concentration range of 0.10-3.6 ?g/ml was determined with a detection limit of 0.16 ?g/ml, and the correlation coefficient was 0.997 6. Conclusion This method is simple, quick and has a high sensitivity and a good reproducibility. It has been applied to measure the given formaldehyde in tap water and free formaldehyde in UF resin with satisfactory results.

Acetaminophen(APAP)is the most wideIy-used anaIgesic drug cIinicaIIy. It is aIso the most risky agent for hepatotoxicity. It has been wideIy used as a modeI drug to study mechanisms of chemicaI-induced Iiver injury and to test the hepatoprotective potentiaI of chemicaIs. This review summa-rized the intraceIIuIar events of acetaminophen-induced hepatotoxicity,incIuding metaboIic activation, ceIIuIar damage,c-Hun N-terminaI kinase pathway,and modified metaboIism function,and additionaIIy focused on the roIe of infIammatory factors and ceIIs in APAP hepatotoxicity,as weII as protection strate-gies of chemicaIs and naturaI products.

Objective To enrich the knowledge in large gastric folds. Methods We investigated 45 cases of large gastric folds in ten years (1990 - 2001) retrospectively. All cases were examined endo-scopically and histologically. Some of them were examined by endoscopic ultrasonography and upper gastrointestinal barium. Results Of 45 cases with large gastric folds there were 30 cases with gastritis (66. 7% ) , seven with malignant tumors( 15. 6% ) (five with gastric carcinoma and two with malignant lymphoma) , four with Menetrier disease(8. 9% ) , two with systemic lupus erythematosus, one each with Billroth II anastomosis and gastric ulcer. The diseases including tumors, Menetrier disease and connective tissue diseases were located in gastric fundus and/or body . Conclusion The diseases located in upper stomach have more clinical significance. All of endoscopic ultrasonography, upper gastrointestinal barium and endoscopic mucosal resection are helpful in differential diagnosis of the large gastric folds.

Objective To investigate the polarization of Th1/Th2/Th3cell function of dermatomyositis/polymyositis(DM/PM).Methods The culture supernatant levels of IL-4,IFN-?,TGF-?1that were produced by the peripheral blood mononuclear cells(PBMC)were detected by Sandwich ELISA in23DM/PM patients(DM18,PM5)and17healthy subjects.Results The level of IFN-?(168.17?218.35ng/mL)produced by PBMC from the patients of DM/PM was significantly lower than that from normal controls(380.61?299.13ng/mL)(P0.05),and normal controls(231.64?83.92)(P

A direct current glow discharge mass spectrometry ( GD-MS) for the determination of Li, Be, Na, Mg, Si, P, K, Ca, Ti, V, Cr, Mn, Co, Ga, Sr, Mo, Ag, Cd, Sn, Sb, W and Pb in nickel-zinc ferrites was developed. Copper powder as the conductive medium was evenly mixed with nickel-zinc ferrites powder for tableting, and then the impurity elements in nickel-zinc ferrites were determined by GD-MS. The influence of sample preparation and the glow discharge conditions including discharge current, discharge voltage, discharge gas flow rate and pre-sputter time on discharge stability and analysis sensitivity were investigated. The mass spectrometry interferences of analytes were investigated, as well as appropriate isotopes were selected. Most of the mass spectrometry interferences were avoided by measuring in medium resolution mode and high resolution mode. Total signal of Fe, Ni, Zn, O and Cu normalization was adopted, and the impurity elements in nickel-zinc ferrites were calculate in subtraction. The results showed that the detection limits for the investigated elements were in the range of 0. 001-0. 29 μg/g, the relative standard deviations of each element were within 3 . 5%-18 . 6%. The analysis results were consistent with those obtained by inductively coupled plasma mass spectrometry.

Objective:To explore the influence of intensive analgesia on the incidence of post-traumatic stress disorder (PTSD) in acute trauma patients, and to develop new ideas for the prevention and treatment of PTSD.Methods:From January 2018 to November 2019, a prospective study was conducted on trauma patients who visited the Emergency Center of Affiliated Hospital of Xuzhou Medical University and met the enrollment criteria. The patients were divided into the intensive analgesia group (< 4) and non-intensive analgesia group (≥ 4) according to the mean pain score in 30 days. The epidemiological data, trauma-related parameters, analgesic schemes, VAS score, PCL-5 score, HADS score and incidence of PTSD of enrolled patients were collected. Appropriate statistical methods were used to analyze differences among the indicators between the two groups.Results:Eighty-four acute trauma cases were included in the study, 39 cases in the intensive analgesia group and 45 in the non-intensive analgesia group. There was no significant difference in baseline data between the two groups (all P>0.05). The incidence rate of PTSD and PCL-5 score of patients in the intensive analgesia group were all significantly lower than those in the non-intensive analgesia group in 1 month after the trauma (all P< 0.05). The HADS anxiety and depression scores of patients in the intensive analgesic group were significantly lower than those in the non-intensive analgesic group (all P< 0.05). All the analgesics were converted into the dosage of dezocine for comparison. The total dosage of analgesics (dezocine) used in patients of the intensive analgesia group was significantly higher than that in the non-intensive analgesia group within 30 days after injury ( P< 0.05). Conclusion:In the acute trauma patients, intensive analgesia after trauma can significantly reduce the incidence of PTSD as well as improve anxiety and depression symptoms.

Objective:To investigate the relationship between the changes in inflammatory markers levels and the onset of post-traumatic stress disorder (PTSD) in the early stage of acute trauma..Methods:From January 2018 to June 2020, patients with acute trauma who were admitted to the Affiliated Hospital of Xuzhou Medical University were selected as subjects. Peripheral venous blood was collected on admission, on the 3rd and 7th day after trauma for routine blood test, C-reactive protein (CRP) and procalcitonin (PCT). The neutrophil to lymphocyte ratio (NLR) was calculated. The PCL-5 scale was used to evaluate PTSD symptoms one month later. The patients were divided into the PTSD group and non-PTSD group with the score of 38 as the boundary. The change rule of NLR in the PTSD group and the non-PTSD group were analyzed.Results:Ninety-one trauma patients were enrolled, including 23 patients in the PTSD group and 68 patients in the non-PTSD group. Compared with the healthy control group, the NLR of 91 trauma patients on admission, on the 3rd and 7th day were significantly higher (all P< 0.01). The NLR of the PTSD group was increased on the 7th day after trauma, which was significantly higher than that of the non-PTSD group ( P= 0.025). The non-PTSD group showed a decreasing trend, of which NLR on the 7th day was significantly lower than that on admission ( P= 0.001). In addition, high level of NLR on the 7th day after trauma (β= 0.206, P= 0.01) was a risk factor for PTSD onset. Conclusions:Dynamic monitoring of the changes in NLR after acute trauma would be of great clinical value to early warning of PTSD.

Objective:To investigate the diagnostic value of conventional endoscopy (CE) and endoscopic ultrasonography (EUS) for invasion depth prediction of superficial gastric cancer.Methods:A total of 84 patients with superficial gastric cancer underwent both CE and EUS before treatment at Beijing Shijitan Hospital from January 2011 to December 2019. The patients were divided into CE affirmation group (47 cases) and CE non-affirmation group (37 cases) according to the endoscopist′s affirmation in the results of CE. Diagnostic accuracy of each method was compared with the histology of the resected specimen. And influential factors for the diagnosis were analyzed.Results:The overall accuracy in determining the invasion depth of superficial gastric cancer was 73.8% (62/84) for CE and 81.0% (68/84) for EUS respectively ( P=0.092). In CE affirmation group, the diagnostic accuracy of CE was significantly higher than that in the CE non-affirmation group [93.6% (44/47) VS 48.7% (18/37), χ2=21.656, P<0.001]. Twenty (23.8%) of 84 lesions were over-staged by CE, dignosed as surgical candidates, and 8 (40.0%) of the over-staged diagnosis were modified by additional EUS assessment. Multivariate logistic analysis showed that influential factors associated with observer affirmation included uneven surface of lesion ( OR=5.076, 95% CI: 1.628-15.821, P=0.005), margin elevation ( OR=3.831, 95% CI: 1.238-11.857, P=0.020) and undifferentiated carcinoma ( OR=6.887, 95% CI: 1.882-25.204, P=0.004). Conclusion:For patients of CE affirmation in the invasion depth, the diagnostic accuracy is high. For those of non-affirmation, additional EUS can improve the diagnostic accuracy and help to develop a more appropriate regime.

Objective To investigate the basic status of healthcare-associated infection(HAI)in a hospital,and provide evidence for strengthening HAI management.Methods A cross-sectional study was conducted to investi-gate the prevalence rates of HAI in all hospitalized patients at 0 ∶00 -24∶00 of May 7,2014.Results A total of 2 262 patients were supposed to be investigated,while 2 253 (99.60%)patients were actually investigated,586 of whom (26.01%)came from pulmonary hospital(specialized in tuberculosis)affiliated to the general hospital.53 patients devel-oped 58 times of HAI,prevalence rate and case prevalence rate was 2.35% and 2.57% respectively;1 073 patients devel-oped 1 265 times of community-acquired infection (CAI),prevalence rate and case prevalence rate was 47.63% and 56.15% respectively.Rates of HAI and CAI were high in intensive care unit(ICU,21.28%)and pulmonary hospital (99.49%)respectively;the main infection site was lower respiratory tract,which accounting for 46.55%(n =27)and 69.72%(n=882)respectively.The major pathogens causing HAI were gram-negative bacteria(n = 19),and the major pathogens causing CAI were Mycobacteria(n=141)and fungi (n=89).The rate of antimicrobial usage and etiological ex-amination was 34.80%(n=784 )and 81.48%(n=550 )respectively.Conclusion In order to prevent cross infection of tuberculosis and reduce the incidence of HAI,lower respiratory tract and ICU should be one of the key infection sites and departments of HAI surveillance,treatment and management of patients with tuberculosis should be stand-ardized,professional precaution of health care workers should be enhanced.

Objective To investigate the prevalence of nutritional risk and malnutrition,and the application of nutrition support in hospitalized patients with surgically treated gynecologic malignant tumors.Methods 237 hospitalized patients with malignant tumors receiving surgery in Department of Gynecology of Beijing Hospital from January 1 to December 31,2013 were continuously sampled.Nutritional Risk Screening 2002 (NRS 2002) was performed in the morning the day after admission.NRS 2002 score ≥ 3 was considered indicating nutritional risk.Malnutrition was judged in accordance with NRS 2002.The application of postoperative nutrition support was recorded.Results The nutritional risk screening was applicable in all the patients (100％).The prevalence of malnutrition was 5.1％ (12/237) in the whole study population,9.2％ in the elderly (≥65 years),significantly higher than that in the patients ＜ 65 years (2.7％) (P =0.034).The nutritional risk rate was 21.1％ (50/237),which was 29.9％ in the patients ≥ 65 years and significantly lower in the patients ＜ 65 years (16.0％) (P =0.014).The nutritional risk rate in the patients with ovarian and endometrial cancers was higher the rate in those patients with vaginal and vulvar cancer was lower.47 patients (19.8％)received postoperative nutrition support,all being parenteral nutrition,including total parenteral nutrition in 13 patients (5.5％) and single transfusion (providing two or more than two amongs glucose,fat emulsion,andi amino acids) in 34 (14.3％).Tube feeding was not applied in all the patients.33 cases (66％) in the 50 patients with nutritional risk were supported by parenteral nutrition,while 14 cases (7.5％) in the 187 patients without nutritional risk were supported by parenteral nutrition.Conclusions There is nutritional risk in the patients with gynecology malignant tumors,the rate of which is higher in elderly patents (≥ 65 years) than in the patients of other age groups.Therefore,attention must be paid to ensure adequate postoperative nutrition support in the elderly patients.