Objective To analyze the change in the concentration of IL-17 and IL-10 inflammatory factors among the deadaptation personnel who returned from the plateau.Methods A total 21 healthy males were investigated who averaged 25 years in age, lived permanently in the plains (200 m), and once stayed to the plateau (Lasha) for 6 months.Their venous blood was collected at three time points:the day before ascending to the plateau(control), the second day after return to the plains(d2) and the 30th day(d30), respectively.Their serum was seperated from the whole blood and the level of IL-17A and IL-10 was detected by ELISA method.Results The concentration of IL-17A and the IL-17A/IL-10 ratio were significant increased at d2 and d30, respectively, compared with control (P<0.05).Compared with d2, IL-17A and the IL-17A/IL-10 ratio were decreased obviously at d30(P <0.05).The level of IL-10 at d2 and d30 was significantly reduced compared with control ( P <0.05), but increased at d30 compared with d2.Correlative analysis showed that there was a negative correlation in the levels of IL-10 and IL-17A between control, d2 and d30, respectively (r1=0.948, P<0.05;r2=0.969, P<0.05;r3=0.972, P<0.05).A significant negative correlation was observed in the alteration levels of IL-10 and IL-17A between the three groups(r4=-0.793, P<0.05; r5=-0.756, P<0.05). Conclusion The concentration of inflammatory factors among the plateau deadaptation patients is imbalanced, but it is gradually reduced with time.The mechanism is still not clear.

Objective:To systematically review the therapeutic effect of continuous high positive end-expiratory pressure (PEEP) ventilation in patients with non-acute lung injury/acute respiratory distress syndrome (non-ALI/ARDS) under general anesthesia mechanical ventilation in the intensive care unit (ICU).Methods:PubMed, JBI Evidence-based Nursing Center Library, Cochrane Library, Embase, Medline, Wanfang Date, CNKI and VIP Database were searched for randomized controlled trials (RCT) and clinical controlled trials (CCT) using different levels of PEEP for the treatment of patients (uncombined ALI/ARDS) in ICU. The search period was from January 1st, 1990 to November 30th, 2018. Compared with the control group, the experimental group was treated with relatively high levels of PEEP ventilation. Outcome indicators were hospital mortality or 28-day mortality, partial oxygen pressure, and incidence of ARDS, atelectasis, and lung infections, etc. The RevMan 5.3 software was used for Meta-analysis.Results:Twelve articles were included, all of which were RCT studies; with 2 Chinese articles and 10 English articles. Meta-analysis showd that there was no statistically significant difference in the effect of different levels of PEEP on the mortality of patients [hospital mortality: odds ratio ( OR) = 1.06, 95% confidence interval (95% CI) was 0.57 to 1.96, P = 0.85; 28-day mortality: OR = 0.34, 95% CI was 0.09 to 1.32, P = 0.12]. Compared with low PEEP, persistently high PEEP could increase the patient's partial oxygen pressure [weighted mean difference ( WMD) = 48.27, 95% CI was 22.56 to 73.97, P = 0.000 2], prevent the occurrence of ARDS ( OR = 0.32, 95% CI was 0.13 to 0.82, P = 0.02), and decrease the incidence of lung infection ( OR = 0.52, 95% CI was 0.30 to 0.89, P = 0.02), but there was no significant difference in the incidence of atelectasis between the two groups ( OR = 0.69, 95% CI was 0.23 to 2.06, P = 0.51). Conclusion:In the treatment of patients in ICU with non-ALI/ARDS under general anesthesia mechanical ventilation, using relatively high levels of PEEP (10-16 cmH 2O, 1 cmH 2O = 0.098 kPa) instead of low levels of PEEP (≤8 cmH 2O) can significantly increase the partial oxygen pressure and significantly reduce the incidences of ARDS and lung infection.