ObjectiveTo study the HIF-1α expression in rats with paraquat poisoning (PQP).MethodsNinety-six healthy SD rats were randomly (random number) divided into 2 groups ( n =48 in each group) : PQP group and control group. The PQP group was further divided into six subgroups as per thedifferent intervals after Paraquat intoxication. Samples from 6 PQP subgroups and control group were taken at 0 h, and 2 h, 6 h, 12 h, 24 h, 48 h, 72 h and 120 h after paraquat administration. Aarterial blood wascollected for blood gas analysis, and the sections of lung tissue were stained with hematoxyhn-eosin and masson's trichrome to detect the trichrome positive area, and HIF-1α was detected by immunohistochemistryAll data were processed with one-factor analysis of variance and Pearson correlation analysis. ResultsTwo hours after paraquat poisoning, the levels of HIF-1α protein and the collagen were both significantly upregulated in the lung tissue in rats with paraquat poisoning. However, the hypoxemia existed until 72h.There was correlation between levels of Masson's trichrome positive area and HIF-1α positive area (r =0. 819, P ＜0. 05 ). There was correlation between the levels of lactic acid in blood gas analysis and HIF-1α positive area (r=0. 761, P＜0. 05. But there was no correlation between levels ofPO2 and HIF-1α positive area (r=-5.24, P＞0. 05). ConclusionsThe level of HIF-1α was up-regulated in rats with paraquat poisoning and it was not associated with hypoxemla.

Objective To evaluate the effect on inflammatory mediators and mechanism of dynamic factors on lung injury in a dog model of acute respiratory distress syndrome (ARDS). Method The ARDS dog model was duplicated by instillation hydrochloric acid. The dogs were randomly (random number) divided into six groups: (1) normal control group (N group); (2) ARDS group (M group); (3) low VT (6 mL/kg) at respiratory rate 30, low inspiratory flow 6 mL/(kg·s). (4) large VT (20 mL/kg) at respiratory rate 30, high inspiratory flow 20 mL/kg·s.(5) large VT (20 mL/kg) at respiratory rate 15, high inspiratory flow 17 mL/(kg·s). (6) large VT (20 mL/kg) at respiratory rate 15, low inspiratory flow 10 mL/(kg·s). All the dogs were killed after 4 h ventilation. TNF-α、IL-8, p38 MAPK and NF-κB activity in the lung were measured. Results The expression of IL-8 protein in B and C groups was much higher than that of other groups ( P < 0.01) . There was no significant difference among M, A and D groups (P > 0.05). The gray scale ratio of B group was obviously higher than that of other groups (P < 0.01), except C group (P > 0.05). There was no significant changes among M, A and D groups in TNF-α protein contents. p38 MAPK value of positive staining of B group was the strongest, significantlyhigher than that of D group ( P < 0.01) .The expression of p38 MAPK in B and C groups was much higher than other groups (P <0.01). NF-κB activity in B group (33.56±2.85%) was significantly higher than that in A (10.35±0.6%)、D(7. 11 ± 0.47%)group, but there was no difference between B and C group (30.87 ± 1.16%). Conclusions Ventilation at high tidal volume, high inspiratory flow rate, high respiratory rate could activate p38 MAPK and increase the activity of NF-κB with the result of aggravating the release of inflammatory mediators. p38 MAPK and NF-κB activation are the major mechanisms in the development of VILI.

OBJECTIVE:To evaluate the status quo of the use of antiallergic drugs.METHODS:The antiallergic drugs used during 2004～ 2006 in the inpatient pharmacy including the non-surgery department,surgery department and pediatric department of our hospital were analyzed statistically in respect of kinds,consumption sum and DDDs.RESULTS:The antiallergic drugs had a fluctuation in consumption sum and DDDs,showing a reduction in 2006.No significant change was noted in the structure of drug use.CONCLUSION:More and more new antiallergic drugs went on the market,but the application still gives priority to the cheaper kinds.

Objective To study the expression of eukaryotic translation initiation factor 4E(eIF4E)in the pathological scars and its probable role in the pathogenesis of pathological scars.Methods Immunohistochemiscal technique was performed to detect the expression and distribution of eIF4E protein in hypertrophic scars(14 cases),keloids(25 cases),mature scars(20 cases)and normal skins(20 cases).Reverse transcription polymerase chain reaction(RT-PCR)was used to detect the eIF4E mRNA level in hypertrophic scars(7 cases),keloids(8 cases),mature scars(8 cases)and normal skins(8 cases).Results Thepositive rate of eIF4E protein expression was remarkably significant difference between normal scars and pathological scars(P＜0.05).The level of eIF4E mRNA in pathological scars 1.73±0.31was higher than that in control group 0.99±0.28.There was significant difference between two groups (P＜O.05).Conclusions The expression of eIF4E is increased in pathological scar.eIF4 E expression is closely associated with the development of pathological scar.Therefore,eIF4E overexpression may play an important role in the proliferation of fibroblasts and in the pathogenesis of pathological scar.

OBJECTIVEStudy on the diagnostic accuracy and value of cell block and tissue fragment preparations collected from lung fine needle aspiration (FNA).

METHODSA total of 187 FNA (22G) samples from the lungs with matched histological diagnosis were studied. Among them, the diagnosis made by depending on 124 cell block and fragment preparations were analyzed in comparing retrospectively with the diagnosis of 187 cases by smear preparations.

RESULTS(1) Of the 124 cell blocks cases, 89 cases were true positives, 22 cases were true negatives, 13 cases were false negatives and no false positives. Of the 187 smears cases, the figure were 136, 30, 19 and 2 cases respectively. The diagnostic accuracy of cell blocks was 87.3% in sensitivity, 100% in specificity, 89.5% in overall accuracy. The figures for smears were 87.7%, 93.8% and 88.8% respectively. (2) For malignant tumours, the histological typing accuracy of cell blocks was 93.3% (83/89), and to be 67.9% (91/134) by diagnosis depending on the smears (P < 0.01). For the benign lesions, the figures were 86.4% (19/22) and 60% (18/30) respectively (P < 0.05). (3) It was possible to obtain many minisections for further studies from cell blocks. Immunoperoxidase staining on minisections was reliable and agreed with those on the surgical specimens.

CONCLUSIONSThe diagnostic accuracy of cell block is high, particularly in histological typing which approaches to that of the diagnosis made depending on the postoperative specimens. A combined use of smears and cell block is recommended which may raise further the diagnostic accuracy.

Adolescent ; Adult ; Aged ; Biopsy, Needle ; Female ; Histocytological Preparation Techniques ; Humans ; Lung Neoplasms ; classification ; pathology ; Male ; Middle Aged

AIM　To investigate the effect of frozen recombinant staphylokinase on the hemostatic and fibrinolytic systems in healthy volunteers, in order to obtain reliable evidence for the possibility of further clinical application. METHOD　r-Sak had been taken intravenously by 20 cases of healthy volunteers in different dosages (1 mg, 2.5 mg, 5 mg, 10 mg, 15 mg). The clinical hemorrhagic manifestations were observed and a set of hemostatic tests(BT, BPC, ATPP, PT, TT, Fg) and fibrinolytic tests (PL∶A,α2-PI∶A, FDP, D-D) monitored before and after injection.　RESULT　Four of 20 volunteers showed slight hemorrhagic tendency on mucocutaneous area (3/4 from gingivea and 2/4 at the sites of injection). It stopped spontaneously. None of them showed visceral bleeding. There were no significant changes in hemorrhagic and coagulative phases. Only 4 of them showed slight abnormal changes in D-D. It was supported that r-Sak was a highly selective fibrirolytic agent without significant influence in human hemostatic and coagulatic system. CONCLUSION　The specific ranges of doseges, r-Sak is a relatively safe and well tolerated agent for healthy people. Further clinical study is still needed for the suitable dosage for clinical application.

Objective To investigate the relationship between the serum level of vancomycin and its clinical efficacy as well as adverse reactions in adult patient so as to provide recommendations for clinical management. Methods An open observational research was performed from 1st July 2013 to 31st December 2017 in Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, which recruited the adult patients who were infected with Gram positive (G+) bacteria and treated with vancomycin. The initial dose was decided by the patient's creatinine clearance rate, and the treating dose was directed by the serum drug concentration and the patient's clinical response. By recording the associated clinical information (pathogen eradication, blood test results, adverse reactions, etc.), the clinical outcome and adverse reactions for vancomycin to treat G+bacterial infections were analyzed. Results Eighty-nine cases who meet research standards were finally recruited, with 67.42% of male patients, and an average age of (50.5±17.9) years. The most common type of infection was bloodstream infection (61.80%), followed by low respiratory infection (17.98%). Infections caused by Staphylococcus aureus accounted for 39.33%. The bacterial eradication rate was 89.89% (80/89) and the total effective rate was 77.53% (69/89). The effective rate was 80.30% (53/66) with minimum inhibitory concentration (MIC) < 2 mg/L vs. 69.57% (16/23) with MIC ≥ 2 mg/L, the difference was not statistically significant (χ2= 1.129, P = 0.288). The effective rate was 72.92% (35/48) with trough levels <10 mg/L vs. 82.93% (34/41) with trough levels ≥ 10 mg/L, the difference was not statistically significant (χ2= 1.272, P = 0.259). There were 4 cases of vancomycin associated nephrotoxicity, the incidence of nephrotoxicity was 4.49%, and the vancomycin serum trough levels were 17.22-28.53 mg/L. There were 33 cases of liver dysfunction, and elevated γ-glutamine transferase, alkaline phosphatase and aspartate aminotransferase were most common. There were 2 cases of neutropenia and 2 patients appeared rash during vancomycin period. Conclusions Treatment outcomes were similar regardless of vancomycin MIC and serum trough level. The incidence of vancomycin associated nephrotoxicity rises apparently when serum trough level is over 15 mg/L. Clinical Trial Registry Chinese Clinical Trail Registry, ChiCTR-OPC-16007920.

Objective:To compare and analyze the clinical features of patients with severe coronavirus disease 2019 (sCOVID-19) and severe community acquired pneumonia (sCAP) who meet the diagnostic criteria for severe pneumonia of the Infectious Diseases Society of America/American Thoracic Society (IDSA/ATS).Methods:A retrospective comparative analysis of the clinical records of 116 patients with sCOVID-19 admitted to the department of critical care medicine of Wuhan Third Hospital from January 1, 2020 to March 31, 2020 and 135 patients with sCAP admitted to the department of critical care medicine of Shanghai First People's Hospital from January 1, 2010 to December 31, 2017 was conducted. The basic information, diagnosis and comorbidities, laboratory data, etiology and imaging results, treatment, prognosis and outcome of the patients were collected. The differences in clinical data between sCOVID-19 and sCAP patients were compared, and the risk factors of death were analyzed.Results:The 28-day mortality of sCOVID-19 and sCAP patients were 50.9% (59/116) and 37.0% (50/135), respectively. The proportion of arterial partial pressure of oxygen/fraction of inspired oxygen (PaO 2/FiO 2)≤250 mmHg (1 mmHg ≈ 0.133 kPa) in sCOVID-19 patients was significantly higher than that of sCAP [62.1% (72/116) vs. 34.8% (47/135), P < 0.01]. The possible reason was that the proportion of multiple lung lobe infiltration in sCOVID-19 was significantly higher than that caused by sCAP [94.0% (109/116) vs. 40.0% (54/135), P < 0.01], but the proportion of sCOVID-19 patients requiring mechanical ventilation was significantly lower than that of sCAP [45.7% (53/116) vs. 60.0% (81/135), P < 0.05]. Further analysis of clinical indicators related to patient death found that for sCOVID-19 patients PaO 2/FiO 2, white blood cell count (WBC), neutrophils (NEU), neutrophil percentage (NEU%), neutrophil/lymphocyte ratio (NLR), total bilirubin (TBil), blood urea nitrogen (BUN), albumin (ALB), Ca 2+, prothrombin time (PT), D-dimer, C-reactive protein (CRP) and other indicators were significantly different between the death group and the survival group, in addition, the proportion of receiving mechanical ventilation, gamma globulin, steroid hormones and fluid resuscitation in death group were higher than survival group. Logistic regression analysis showed that the need for mechanical ventilation, NLR > 10, TBil > 10 μmol/L, lactate dehydrogenase (LDH) > 250 U/L were risk factors for death at 28 days. For sCAP patients, there were significant differences in age, BUN, ALB, blood glucose (GLU), Ca 2+ and D-dimer between the death group and the survival group, but there was no significant difference in treatment. Logistic regression analysis showed that BUN > 7.14 mmol/L and ALB < 30 g/L were risk factors for 28-day death of sCAP patients. Conclusions:The sCOVID-19 patients in this cohort have worse oxygen condition and symptoms than sCAP patients, which may be due to the high proportion of lesions involving the lungs. The indicators of the difference between the death group and the survival group were similar in sCOVID-19 and sCAP patients. It is suggested that the two diseases have similar effects on renal function, nutritional status and coagulation function. But there were still differences in risk factors affecting survival. It may be that sCOVID-19 has a greater impact on lung oxygenation function, inflammatory cascade response, and liver function, while sCAP has a greater impact on renal function and nutritional status.

The global coronavirus disease 2019 epidemic is still in a pandemic state. Aging population with underlying diseases is prone to become severe, and have a higher mortality. The treatment capacity of the critical care department directly determines the treatment success rate of critical illness. At present, there is still a certain gap between domestic and foreign countries in intensive care unit (ICU), which is not only in the allocation of medical staff, but also in the beds and settings. The current medical model cannot fully meet the needs of development. The experience and lessons of many major public health emergencies suggested that " dual track of peace and war" approach in discipline construction of critical care is the best medical model. Following the concept of "combination of peace and war", strengthening the discipline construction of critical care department in municipal and district designated hospitals, allocating reasonable standard ICU, step-down ICU and combat readiness ICU, establishing rapid response team, and strengthening regular training and scientific management may be the key measures to deal with the epidemic.

Objective To evaluate the efficacy of patient-controlled brachial plexus block with different concentrations of dexmedetomidine mixed with ropivacaine for analgesia after elbow joint surgery.Methods One hundred patients of both sexes,aged 18-64 yr,weighing 45-75 kg,of American Society of Anesthesiologists physical status Ⅰ or Ⅱ,undergoing elbow joint surgedyy,were divided into 4 groups (n =25 each) using a random number table method:different concentrations of dexmedetomidine mixed with ropivacaine groups (DR1-3 groups) and ropivacaine group (group R).An analgesia pump was connected at the end of surgery and patient-controlled brachial plexus block was performed.The patient-controlled analgesia (PCA) solution contained 0.5 μg/ml dexmedetomidine and 0.2％ ropivacaine in group DR1,0.75 μg/ml dexmedetomidine and 0.2％ ropivacaine in group DR2,1 μg/ml dexmedetomidine and 0.2％ ropivacaine in group DR3 and 0.3％ ropivacaine in group R.All the drugs were diluted to 400 ml in normal saline in each group.The PCA pump was set up to deliver 3 ml bolus dose with a 20-min lockout interval and background infusion at 5 ml/h.Parecoxib 0.6 mg/kg was intravenously injected as a rescue analgesic.The visual analogue scale (VAS) scores at rest and during movement (voluntary and continuous passive movement) were recorded at the end of surgery and 12,24,36,48 and 72 h after surgery.The number of successfully delivered doses,the number of attempt and postoperative consumption of parecoxib were recorded.The elbow flexion angle during voluntary and continuous passive movement was recorded.The development of motor block and drug-related adverse reactions was also recorded.Results There was no significant difference in VAS scores at rest at each time point among the four groups (P＞0.05).Compared with group R,the VAS scores during movement,the number of attempts,the number of successfully delivered doses and parecoxib consumption were significantly increased in DR1 and DR2 groups,the elbow flexion angle during voluntary and continuous passive mnovement was significantly decreased in group DR1,the elbow flexion angle during continuous passive movement was significantly decreased in group DR2,and the elbow flexion angle during voluntary movement was significantly increased (P＜0.05),and no significant change was found in the other parameters in group DR3 (P＞0.05).Compared with group DR1,the VAS scores during movement were significantly decreased,the number of attempts,the number of successfully delivered doses and parecoxib consumption were decreased,and the elbow flexion angle during voluntary and continuous passive movement was increased in DR2 and DR3 groups (P＜0.05).Compared with group DR2,the VAS scores during movement were significantly decreased,the number of attempts,the number of successfully delivered doses and parecoxib consumption were decreased,and the elbow flexion angle during voluntary and continuous passive movement was increased in group DR3 (P＜0.05).No motor block was found in DR1,DR2,and DR3 groups,and the incidence of motor block was significantly higher in group R than in the other three groups (P＜0.05).The hemodynamics was stable and no drug-related adverse reactions were found in the perioperative period in the four groups.Conclusion Patient-controlled brachial plexus block with dexmedetomidine 1 μg/ml mixed with 0.2％ ropivacaine can provide satisfactory analgesia and is helpful in improving prognosis for the patients undergoing elbow joint surgery.