Objective To compare the effectiveness of P6 stimulation and sham stimulation/ drug intervention on prevention of postoperative nausea and vomiting (PONV). Methods We searched PubMed (1990 to 2010), OVID (1990 to 2010), EBSCO (1990 to 2010), The Cochrane Library (1996 to 2010), PNAI (1990 to 2010), Hight Wirepres (1990 to 2010), and Chinese Digital Hospital Library (www.chkd.cnki.net) (1999 to 2010) to identify randomized controlled trials (RCTs) about P6 stimulation and sham stimulation/drug intervention on prevention of PONV. The methodological quality of the included studies was assessed and the data was extracted according to the Cochrane Reviewer’s Handbook 4.2.2. Meta-analyses were performed using RevMan 4.2 software. Results A total of 21 studies were included. The results of meta-analyses indicated that: (1) Compared with sham stimulation, P6 stimulation could be effective in preventing postoperative nausea (beginning to termination) (Plt;0.000 01), postoperative early nausea (lt;after surgery 6 h) (P=0.000 6) and postoperative late nausea (gt;after surgery 6 h) (P=0.001). (2) Compared with sham stimulation, P6 stimulation could be effective in preventing postoperative vomiting (beginning to termination) (Plt;0.0.000 1) and postoperative early vomiting (P=0.002), but as to postoperative late vomiting (gt;after surgery 6 h), P6 stimulation had no effective preventive effect (P=0.08). (3) Compared with the drug intervention, P6 stimulation had little effect on preventing postoperative nausea (P=0.29) and vomiting (P=0.15). Conclusion Compared with sham stimulation, P6 stimulation can be effective in preventing postoperative early nausea and vomiting as well as postoperative late nausea, but not effective in preventing postoperative late vomiting. In comparison with drugs, a large number of clinical trials are needed to prove P6 stimulation can replace drugs to prevent postoperative nausea and vomiting.
ObjectiveTo systematically review the efficacy and safety of oxycodone versus morphine for postoperative intravenous self-control analgesia (PCIA). MethodsWe searched databases including PubMed, EMbase, The Cochrane Library (Issue 8, 2015), CBM, CNKI, VIP, WanFang Data from inception to August 2015, to collect randomized controlled trials (RCTs) about oxycodone versus morphine for postoperative PCIA. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Then, meta-analysis was performed using RevMan 5.3 software.ResultsSeven RCTs involving 826 patients were included. The results of meta-analysis showed that: there were no significant differences in postoperative analgesia at the points of 2 h, 3 h, 4 h, 8 h, 12 h, 24 h, 36 h and 48 h after surgery (2 h: MD=0.20, 95%CI –0.18 to 0.58, P=0.30; 3 hresting state: MD=–0.51, 95%CI –2.27 to 1.26, P=0.57; 3 hdynamic state: MD=–0.46, 95%CI –2.23 to 1.40, P=0.63; 4 h: MD=0.00, 95%CI –0.25 to 0.25, P=0.99; 8 h: MD=0.10, 95%CI –0.16 to 0.36, P=0.46; 12 h: MD=–0.34, 95%CI –0.85 to 0.17, P=0.19; 24 h: MD=–0.13, 95%CI –0.43 to 0.17, P=0.41; 36 h: MD=0.10, 95%CI –0.28 to 0.48, P=0.60; 48 h: MD=–0.13, 95%CI –0.36 to 0.09, P=0.25). The incidences of postoperative vomiting (OR=0.23, 95%CI 0.08 to 0.63, P=0.005), nausea (OR=0.27, 95%CI 0.08 to 0.86, P=0.03), respiratory depression (OR=0.15, 95%CI 0.04 to 0.53, P=0.003) and skin pruritus (OR=0.19, 95%CI 0.05 to 0.66, P=0.009) in the oxycodone group were lower than those in the morphine group. In addition, there were no significant differences of the incidences of headache, dizzy and shiver between two groups.ConclusionCompared with morphine, oxycodone has the same analgesia effect for PCIA, however, the incidences of adverse reactions are lower. Due to the limited quality and quantity of included studies, the above results are needed to be validated by more high quality studies.
Objective To evaluate the effectiveness and safety of dexmedetomidine for postoperative sedation in cardiac patients. Methods Such databases as PubMed, EBSCO, Springer, Ovid, The Cochrane Library, CBM, CNKI, VIP and WanFang Data were searched electronically from the date of their establishment to May 2012, and other relevant journals and references of the included literature were also searched manually. Two reviewers independently screened the studies in accordance with the inclusion and exclusion criteria, extracted data and assessed methodology quality. Then the meta-analysis was performed using RevMan 5.1software. Results A total of 8 randomized controlled trials (RCTs) involving 1 157 patients were included. The Jadad scores of 7 RCTs were more than 3, and only 1 RCT scored 2. The results of meta-analysis showed that compared with the control group, dexmedetomidine significantly raised peripheral oxygen saturation (RR=0.90, 95%CI 0.31 to 0.49, P=0.003), decreased the incidence of average heart rate (RR=–5.86, 95%CI –7.31 to −4.40, Plt;0.000 01), ventricular tachycardia (RR=0.27, 95%CI 0.08 to 0.88, P=0.03), delirium (RR=0.28, 95%CI 0.16 to 0.48, Plt;0.000 01) and postoperative hyperglycemia (RR=0.57, 95%CI 0.38 to 0.85, P=0.006), and reduced the number of patients who needed vasoactive agents such as epinephrine (RR=0.53, 95%CI 0.29 to 0.96, P=0.04) and β-blocker (RR=0.60, 95%CI 0.38 to 0.94, P=0.03). However, it failed to shorten the time of both ICU stay (RR=−1.24, 95%CI −4.35 to 1.87, P=0.43) and mechanical ventilation (RR=−2.28, 95%CI −5.13 to 0.57, P=0.12), increase mean artery pressure (RR=−2.78, 95%CI −6.89 to 1.34, P=0.19), and well control postoperative nausea, vomiting and atrial-fibrillation. There were no significant differences between the two groups in myocardial infarction, acute cardiac failure, acute kidney failure, and mortality rate. Conclusion For postoperative sedation in cardiac patients, dexmedetomidine can effectively stabilize hemodynamic indexes, and reduce tachycardia, delirium, postoperative hyperglycemia and vasoactive agents. However, it has no marked influence on the prognosis. For the quantity and quality limitation of included studies, this conclusion needs to be proved by performing more high quality and large sample RCTs.
Objective To systematically evaluate the effect of epidural analgesia on prognosis after intestinal surgery. Methods Such databases as PubMed, EBSCO, Springer, Ovid and CNKI were searched to identify randomized controlled trials (RCTs) about the effects of epidural analgesia on prognosis after intestinal surgery published from 1985 to 2010. The methodological quality of the included RCTs was assessed and the data was extracted according to the Cochrane Handbook, and then the meta-analyses were conducted by using RevMan 5.0 software. Results Ten RCTs involving 506 patients were included. The results of meta-analyses showed that compared with the patient controlled analgesia (PCA), the patient controlled epidural analgesia (PCEA) significantly reduced the waiting time for having first flatus, first defecation, and the length of hospital stay (MD= –1.07, 95%CI –1.63 to –0.50; MD= –0.63, 95%CI –1.19 to –0.08; MD= –1.36, 95%CI –2.28 to –0.44; respectively), lowered the frequency of vomiting on the first and second day after operation (OR=0.33, 95%CI 0.13 to 0.82; OR=0.3, 95%CI 0.13 to 0.84; respectively), and obviously declined the visual analog scale (VAS) scores of rest pain on the first, second and third day after operation (MD= –26.60, 95%CI –33.06 to –20.15; MD= –25.98, 95%CI –30.98 to –20.97; MD= –15.59, 95%CI –27.29 to –3.88; respectively), and the VAS scores of motion pain on the first, second and third day after operation (MD= –26.00, 95%CI –36.00 to –16.00; MD= –27.89, 95%CI –35.70 to –20.08; MD= –11.79, 95%CI –21.28 to –2.30; respectively). There were no significant differences between the two groups in the incidence of urinary tract infection, urinary retention, anastomotic leak and ileus. Conclusion PCEA significantly reduces the waiting time for having first flatus and first feces, the length of hospital stay, the VAS scores of pain, and the incidence of postoperative vomiting.