Wei Li

Sun Yat-Sen University, Guangzhou, Guangdong Sheng, China

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Publications (4)0 Total impact

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    ABSTRACT: Percutaneous radiofrequency ablation (PRFA) is a new and effective microinvasive operation for small hepatocellular carcinoma, but the effect of local anesthesia or single analgesic injection as regular anesthesia is unsatisfied. This study was to evaluate the efficacy and safety of continuous intravenous infusion of remifentanyl combined with propofol as total intravenous anesthesia during PRFA. Sixty patients scheduled for PRFA were randomized into remifentanyl group (R) and fentanyl group (F). Each group contained 30 patients. Group R received remifentanyl infusion at the dose of 0.1 microg x kg(-1) x min(-1) by micro pump; group F received bolus intravenous injection of fentanyl at 1.5 microg x kg(-1) before operation. Anesthesia was maintained with propofol. The mean arterial pressure (MAP), heart rate (HR), pulse oxygen saturation (SPO2), respiration rate (RR), partial pressure of carbon dioxide in artery (PaCO2) and recovery time were measured and recorded by monitor. The limb movement, apnea, body movements, and chest wall rigidity were recorded during operation. The recovery time of group R was significantly shorter than that of group F [(5.0+/-1.8) min vs. (10.7+/-3.0) min, P<0.001]; the total consumption of propofol was less in group R than in group F [(172.0+/-37.3) mg vs. (330.3+/-61.2) mg, P<0.001]. Group R had less cases with limb movement (5 cases vs. 12 cases) but more cases with apnea (12 cases vs. 6 patients) as compared with group F. Total intravenous anesthesia with remifentanyl and propofol for PRFA is safe and reliable. Respiratory depression should be monitored instantly and strictly.
    Ai zheng = Aizheng = Chinese journal of cancer 03/2007; 26(3):322-4.
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    ABSTRACT: Ulinastatin is a kind of broad- spectrum hydrolase inhibitors purified from urine of healthy males.There was no data showing whether ulinastatin could affect alveolar inflammatory reactions.This study was designed to investigate the changes of pulmonary alveolar interleukin-8 during one lung ventilation (OLV) in surgery and the effects of ulinastatin on alveolar IL-8. Sixty patients,ASA II- III,who underwent lobectomy, were randomly divided into two groups [30 patients in each group,surgery group(II) and control group (I)].Patients in surgery group were treated with ulinastatin 5,000 u/kg preoperatively. Alveolar IL-8 was harvested by bronchoalveolar lavage at 0, 1, and 2 hours after one lung ventilation and at the end of surgery. The changes of concentration of IL-8 in bronchoalveolar lavage fluid were analyzed statistically. (1)Alveolar interleukin 8 was significantly higher at 2 hours after OLV [(160.85+/-46.58)ng/L] than before OLV [(128.26+/-35.35)ng/L] in control group. The results indicated that OLV and/or the stimulation of surgery could induce the pulmonary inflammatory reaction. (2)The concentrations of alveolar IL-8 at 2 hours [(140.32+/-41.25)ng/L] after OLV and at the end of surgery [ (156.74+/-43.58) ng/L] were significantly lower in surgery group than those in control group [(160.85+/-46.58)ng/L and (172.41+/-52.60)ng/L] respectively(P< 0.05). Ulinastatin could alleviate the pulmonary alveolar inflammatory reactions in OLV.
    Ai zheng = Aizheng = Chinese journal of cancer 10/2003; 22(10):1074-6.
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    ABSTRACT: Morphine has been proved to inhibit human immune system, and large dose of fentanyl also decrease the activation of natural killer cells. This study was designed to investigate the effects of different doses of fentanyl on T-lymphocyte subpopulations and natural killer cells during esophageal cancer surgery under general anesthesia. Forty-five patients with esophageal cancer were randomly divided into 3 groups (I, II,III) with 15 cases in each group respectively. The doses of fentanyl in three groups were 5, 10, and 20 microg/kg, respectively. Central venous blood samples (6 ml) were collected before anesthesia, 24 hours and 48 hours after the operation, respectively. Monoclonal antibodies assay was used to identify T cells and NK cells. The counts of CD3(+) (T%) (Group I 50.30+/-8.42, Group II 48.53+/-9.62, GroupIII 46.58+/-8.56), CD4(+) (T%) (Group I 30.04+/-7.24, Group II 28.67+/-7.52, Group III 26.65+/-6.55),and NK cells (Group I 3.26+/-1.62, Group II 3.01+1.56, GroupIII 3.01+/-1.54) in three groups decreased significantly at 24 hours after surgery (P< 0.01). The decrease at 48 hours after surgery were more significant in groupIII (CD3(+) 48.89+/-9.82, CD4(+) 22.64+/-6.02, NK Cells 3.41+/-1.88) than in group I(CD3(+) 57.32+/-9.13, CD4(+) 35.62+/-5.98, NK cells 5.96+/-1.08) and group II(CD3(+) 55.62+/-10.21, CD4(+) 34.24+/-6.85, NK cells 6.04+/-1.09) (P< 0.05). There was no statistical significance in the counts of CD3(+), CD4(+), and NK cells between the time of 48 hours after the operation and preoperation in group I and group II. Fentanyl, as a kind of opiate drug, could contribute to the immunosuppression, and large-dose fentanyl administration would be more effective in suppression of immunity function than small dose fentanyl.
    Ai zheng = Aizheng = Chinese journal of cancer 07/2003; 22(6):634-6.
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    ABSTRACT: Morphine is a widely used analgesic in management of postoperative pain with well documented analgesic properties and side effects. Tramadol, a new synthetic mu-opioid receptor agonist, little is known about its efficacy and side effects when administered in epidural for pain relief. The aim of this study is to compare the efficacy and side effects of tramadol, morphine versus their combination for postoperative analgesia. One hundred and twenty patients undergoing abdominal cancer surgery were assigned to one of three groups randomly, tramadol group (Group T, n = 40), morphine group(Group M, n = 40) and combination of tramadol and morphine group(group T + M, n = 40), for postoperative analgesia. In group T, 12 mg/kg tramadol and 0.125% bupivacaine 100 ml were used for 48 h postoperative analgesia. In group M, 0.12 mg/kg morphine and 0.125% bupivacaine 100 ml; and in group T + M, 6 mg/kg tramadol, 0.12 mg/kg morphine and 0.125%. Bupivacaine 100 ml were used for postoperative analgesia. Efficacy was assessed by comparing visual analogue scale(VAS), Bruggman comfort score (BCS), global satisfaction score (GSS) at several time points over 48 hours. Possile adverse events were recorded. There is no significant difference among three groups in VAS, but in group T, there are more patients whose VAS > 5 score than those in group M and group T + M. BCS; GSS in group T + M are lower than that in group T and group M. The occurrence rate of nausea and vomiting in group T + M are lower than that in group M. The efficacy of tramadol in epidural postoperative analgesia is similar to that of morphine, but varied from patient to patient, so the dose of tramadol should be individualized. Combination of tramadol and morphine can provide effective analgesia for postoperative pain and cause little adverse effect, especially reduce the occurrence rate of nausea and vomiting.
    Ai zheng = Aizheng = Chinese journal of cancer 07/2002; 21(7):794-6.