ObjectiveTo observe the effect of preoperative hyperbaric oxygen (HBO) pretreatment on systemic inflammatory response after extracorporeal circulation. MethodsA total of 30 patients who were going to receive mitral or aortic valve replacement were randomly allocated into a control group (group C, n=15) and a pretreatment group (group P, n=15).Three sessions of HBO pretreatments were given to the patients in the group P before operation. The changes of serum concentration of inflammatory factors including tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-10, P-selectin, intercellular adhesion molecule (ICAM)-1, heat shock protein (HSP)-70 between the two groups were compared at four time points:before incision of skin (T1), 30 min after ECC(T2), 1 h (T3) and 24 h (T4) after the end of ECC. ResultsThere was no statistical difference in the serum concentration of IL-6,TNF-α, P-selectin, ICAM-1, IL-10, and HSP-70 at T1 between the two groups (P>0.05). The level of all inflammatory factors ascended in first and descended at last in both groups, which reached a peak at T3 and descended at T4. But the serum concentration at T4 was still higher than the level at T1 (P<0.05). There was a statistical difference in serum level of HSP-70 between T4 and T1 (373.3±96.7 pg/ml vs. 316.3±55.5 pg/ml, P<0.05). There were statistical differences in serum concentration of IL-6 (141.5±25.9 pg/ml vs. 119.2±31.8 pg/ml), HSP-70 (449.8±48.3 pg/ml vs. 373.3±96.7 pg/ml), and IL-10 (64.2±8.2 pg/ml vs. 90.3±14.2 pg/ml) between the group C and the group P at T4 (P<0.05). There was no statistical difference between the two groups in postoperative ICU stay time and thoracic drainage. While time of postoperative ventilation in the group P was shorter than that in the group C with a statistical difference (11.4±5.6 days vs. 15.8±5.1 days, P<0.05). ConclusionHyperbaric oxygen pretreatment before operation can abate the bad inflammatory response after heart valve replacement surgery to some extent and strengthen the anti-inflammatory protection, thereby favoring the reduction in postoperative complications.
ObjectiveTo evaluate the quality, status of clinical practice guidelines on stomatology in China and discuss existing problems, so as to provide references for developing evidence-based guidelines. MethodsComprehensive search was conducted up to January 2014 for relevant clinical practice guidelines on stomatology, and the retrieval date was January 30th, 2014. After data extraction from eligibility guidelines, the quality was evaluated using the AGREE Ⅱ instrument and then descriptive analysis was performed. ResultsFinally a total of 18 guidelines were included, of which, 13 were for oral and maxillofacial surgery diseases. Based on the AGREE Ⅱ instrument, the average scores on the six domains were as follows:71.1% for scope and purpose, 40.1% for stakeholder involvement, 28.8% for rigor of development, 71.5% for clarity of presentation, 42.6% for applicability, and 8.6% for editorial independence. ConclusionThe overall quality of clinical practice guidelines on stomatology in China is relatively poor, only a few diseases are concerned, and no evidence-based guideline has been developed so far. However, considered the limitations of this study, the results of this study is only for a reference.
ObjectiveTo investigate the knowledge related to evidence-based medicine (EBM) in the medical students of Hubei University of Medicine using a cross-sectional survey approach. MethodsWe conducted an investigation on 600 medical students (extracted by stratified random sampling) from different majors and different grades who were at school using a pre-designed questionnaire from May 10th to May 12th, 2013. The data were analyzed with Microsoft Excel 2007. ResultsA total of 545 valid questionnaires were recovered with an effective recovery rate of 90.8%. The results showed that 58.5% of the participants heard of EBM for the first time or once heard of it but knew nothing; 38.2% had learnt some knowledge about EBM. However, only 3.3% were familiar with it; all the participants suggested EBM teaching should be performed. ConclusionThe knowledge related to EBM in the medical students of Hubei University of Medicine is low. However, their study attitude towards EBM is pretty good. The level of EBM teaching needs to be improved.