Objective To evaluate the efficacy and safety of tropisetron for the prevention of postoperative nausea and vomi -ting (PONV) after general anesthesia .Methods We searched the PubMed ,EBSCO ,Cochrane ,CNKI and Weipu database to identi-fy randomized controlled trials (RCT ) about tropisetron in preventing PONV after general anesthesia .The methodological quality of the included RCT was assessed and data were extracted .The meta-analyses were performed by Rev Man5 .0 software .Results A total of 18 RCT met the inclusion criteria ,involving 2 901 patients .All RCT were randomized double-blind experiments .The results of meta-analyses showed that :(1)tropisetron could significantly decrease the incidence of PONV after general anesthesia ,[OR =0 .43 ,95% CI(0 .33 - 0 .57)] ,the efficacy in later period [OR = 0 .41 ,95% CI(0 .25 - 0 .65)] was better than that in earlier period [OR = 0 .66 ,95% CI(0 .44 - 0 .98)] ;(2)compared with tropisetron ,the combination of tropisetron and dexamethasone could signifi-cantly decrease the incidence of PONV [OR = 0 .37 ,95% CI(0 .22 - 0 .64)] ;(3)compared with granisetron or ondansetron ,tropise-tron could not significantly decrease the incidence of PONV ,the OR was [OR = 1 .08 ,95% CI(0 .68 - 1 .73)] and [OR = 0 .77 ,95%CI(0 .27 - 2 .21)] respectively ;(4)compared with dexamethasone ,tropisetron could not significantly decrease the incidence of PONV [OR = 1 .06 ,95% CI(0 .49 - 2 .30)] .Conclusion Tropisetron can significantly decrease the incidence of PONV after general anesthesia .It has also the advantage of decreasing incidence of the incidence of PONV combined with other non-5 HT-3 receptor in-hibitor such as dexamethasone .

Objective A meta-analysis was conducted to figure out the effects of anesthetic methods on postoperative myocardial infarction in noncardiac surgery patients.Methods We searched PubMed, Embase, Ovid, Cochrane Library, Google scholar, CNKI, Wang-fang data and VIP Database (by September 2016) to identify relevant studies that focused on the effect of intrathecal blockade on postoperative myocardial infarction and mortality in non-cardiac surgery.Meta-analysis was performed using software of RevMan 5.3.Results A total of 21 859 patients from 10 RCTs were enrolled.The meta-analysis showed that there were no differences in myocardial infarction within 7 postoperative days (OR=0.44, 95%CI 0.13-1.46, P=0.18) or 30 days (OR=1.49, 95%CI 0.89-2.49, P=0.13) and all-cause mortality (OR=1.26, 95%CI 0.84-1.88, P=0.26) between epidural anesthesia combined with general anesthesia and general anesthesia.Furthermore, there were no differences in myocardial infarction within postoperative 7 days (OR=1.14, 95%CI 0.31-4.17, P=0.84) and all-cause mortality within postoperative 30 days (OR=0.88, 95%CI 0.43-1.79, P=0.73) between spinal anesthesia alone and general anesthesia alone.Conclusion Intrathecal blockade cannot affect the incidence of myocardial infarction and mortality in high-risk cardiac patients undergoing intermediate or high-risk non-cardiac surgery.

Objective:To assess the effect of patient-controlled intravenous analgesia (PCIA) with different postoperative analgesics on prognosis after colorectal surgery. Methods:A total of 460 colorectal cancer patients (TNMⅠ-Ⅱ) who underwent elective surgery within January 2010 to December 2012 in Chongqing Cancer Hospital were randomly divided into five groups for PCIA with sufentanil, dezocine, butorphanol, morphine, and tramadol. We evaluated the analgesic efficacy, detected NK cell activity and Th1/Th2 ratio from peripheral blood, and observed short-term complications and long-term cancer recurrence and metastasis. Healthy volunteers served as the control group. Results:The morphine group displayed a VAS score of less than 3 in the rest state and showed the longest hospital stay and the highest incidence of pruritus (P<0.05). The incidence of postoperative nausea and vomiting was the highest in the tramadol group (P<0.05). NK cel activity and Th1/Th2 ratio decreased in al experimental groups after surgery. NK activity and Th1/Th2 ratio returned to the control level 7 days after surgery in the tramadol and sulfentanil groups and 14 days after surgery in the dezocine and butorphanol groups (P>0.05), whereas those in the morphine group remained low (P<0.05). The incidences of cancer recurrence and metastasis were ranked as follows:morphine>butorphnol>dezocine>sufentanil>tramadol. Conclusion:Tramadol and sufentanil used in PCIA after colorectal surgery could facilitate the recovery of immune function and reduced the incidence of recurrence and metastasis.