Objective To determine the difference between target and measured concentration of remifentanil given by target-controlled infusion (TCI) and evaluate the performance of a new type Ⅰ TCI system for Chinese. Methods Thirty-six ASA Ⅰ or Ⅱ patients aged 40-60 yr weighing 50-70 kg undergoing elective lung resection were randomly divided into 2 groups according to target remifentanil concentration: group Ⅰ 6 ng ? ml-1 and group Ⅱ 8 ng?ml-1. The patients were premedicated with intramuscular midazolam 0.05 mg?kg-1 and atropine 0.5 mg. Anesthesia was induced with remifentanil and propofol both given by TCI. The target concentration of propofol (effect-site concentration) was set at 3 ?g?ml-1 and remifentanil (plasma concentration) at 6 or 8 ng? ml-1. When the patients lost consciousness, vecuronium 0.1 mg?kg-1 was given i. v. to facilitate intubation. The patients were mechanically ventilated and PETCO2 was maintained at 30-40 mm Hg. Anesthesia was maintained with TCI of propofol and remifentanil and intermittent i. v. boluses of vecuronium. Target plasma concentration of remifentanil remained unchanged during anesthesia. BIS value was maintained at 45-55 by modifying target propofol concentration. Arterial blood samples were taken before and 5, 10, 20, 40, 60, 90 and 120 min after TCI remifentanil was started for determination of blood remifentanil concentration by high performance liquid chromatography.The performance error (PE) was determined for each measured blood remifentanil concentration. The performance in the population was determined by median absolute performance error (MDAPE), median performance error (MDPE) and the wobble (the median absolute deviation of each PE from the MDPE). Results The measured concentrations (Cm) of remifentanil were significantly lower than the target plasma concentration (Cp) at5, 10, 20 min of TCI in both groups ( P

0 05), only T 8 level decreased significantly in group Ⅲ (P

OBJECTIVE:To develop a RP-HPLC method for determining serum concentration of propofol METHODS:Using ODS C18 column as fixed phase,a mixture of methanol and water(75∶25) as mobile phase,excitation wavelength 270nm,emission wavelength 295nm RESULTS:The linear range was 0 0 375～8 0?g/ml,r=0 9 996 The within-day and between-day RSDs were less than 5%,the average recovery was 83 98% CONCLUSION:This is a good method to monitor propofol serum concentration

Objective To investigate the effect and safety of combined spinal-epidural analgesia (CSEA) with different doses of ropivacaine during labor. Methods One hundred ASA Ⅰ -Ⅱ full term primigravidae were randomly divided into 5 groups: group Rl (n =20), R2 (n =21), R3 (n = 21), group Y ( n = 19) and group C ( n = 20) . When the external cervical os was dilated to 3-4cm lumbar puncture was performed at L2-3 or L3-4 with a special CSE needle. 0.75% ropivacaine 0.33ml (2.5mg), 0.5ml (3.75mg) or 0.67ml (5mg) was added to 5% glucose with a total volume of 2.5ml and injected into subarachnoid space in group R1, R2 and R3 respectively. When subarachnoid block was wearing off, patient controlled-epidural analgesia (PCEA) with 0.175% ropivacaine was started (background infusion 6ml/h, bolus 2ml, lock-out time 15min) . In group Y patients received only PCEA with 0.175% ropivacaine and in group C patients received neither CSEA nor PCEA and served as control. Level of pain (VAS scores), degree of motor block (modified Bromage scores), Apgar scores and neurological and adaptive capacity scores (NACS), the progress of labor, the amount of ropivacaine used and side effects were recorded and compared. Blood samples were taken from umbilical vein for blood gas analysis immediately after delivery. Results Demographic data were comparable between groups and there were no significant differences in the progress of labor, Apgar score, NACS and blood gases of umbilical venous blood between groups. The onset of analgesia was significantly faster in group R1, R2 and R3 than that ingroup Y(P

Objective We sought to summarize the experience in nursing the patients of Robertsonian translocation receiving pre-implantation genetic diagnosis (PGD).Methods Thirty-eight patients with Robertsonian translocation received PGD.These patients received health education and psychological nursing except for routine therapy and nursing.Results All these patients had no obvious negative emotion and complied with the therapy.Nine patients were successfully pregnant and pregnancy rate was 23.7％,7 of them delivered healthy neonates.Conclusions Health education,psychology nursing together with controlled ovarian stimulation,egg retrieval and embryonic transplantation can reduce negative emotion,improve compliance of therapy,and benefit the process of PGD and clinical outcomes.

Objective To compare the effects of fentanyl,sufentanil and remifentanil on the immune function of dendritic cells in human umbilical cord blood.Methods Human umbilical cord blood mononuclear cells were obtained by density gradient centrifugation and seeded in 24-well plates with a density of 1 × 106/ml (2ml/hole).The cells were randomly divided into 7 groups (n =15 each):control group (group C),fentanyl 1.0 ng/ml group (group F1),fentanyl 5.0 ng/ml group (group F5),sufentanil 0.1 ng/ml group (group S1),sufentanil 0.5 ng/ml group (group S5),remifentanil 1.0 ng/ml group (group R1),and remifentanil 5.0 ng/ml group (group R5).The cells were incubated for 10 days in serum-free culture medium containing 50 ng/ml recombinant human granulocyte colony stimulating factor,10 ng/ml recombinant human interleukin-4 or the corresponding concentration of fentanyl,sufentanil or remifentanil,and then 50 ng/ml recombinant human tumor necrosis factor alpha was added to the culture medium and the cells were incubated for another 4 days in the seven groups.Three holes in each group were chosen and the cell morphology was examined with inverted microscope.Six holes in each group were chosen for determination of the concentration of IL-12 in the supernatant and expression of CD80/CD86.Six holes in each group were chosen for measurement of the cell viability.Results Compared with group C,the concentration of IL-12 and cell viability were significantly decreased and the expression of CD80/CD86 was down-regulated in groups F5,S1,S5,R1 and R5 (P ＜ 0.05).The concentration of IL-12,cell viability and expression of CD80/CD86 were significantly lower in groups S1 and R1 than in group F1 (P ＜ 0.05).Compared with group F5,the concentration of IL-12 was significantly decreased in group S5,and the concentration of IL-12 and cell viability were significantly decreased and the expression of CD80/CD86 was down-regulated in group R5 (P ＜ 0.05).The concentration of IL-12 and cell viability were significantly lower in group R1 than in group S1 (P ＜ 0.05).The concentration of IL-12,cell viability and expression of CD80/CD86 were significantly lower in group R5 than in group S5 (P ＜ 0.05).Conclusion Remifentanil has stronger inhibitory effect on the immunological function of dendritic cells in human umbilical cord blood than sufentanil,and the inhibitory effect of sufentanil is stronger than that of fentanyl.

Objective To investigate the effect of malignant tumor on neuromuscular block of cisatracurium. Methods Sixty ASA Ⅰ or Ⅱ patients with head and neck neoplasms (15 cases with benign tumor, 45 with malignant tumor), aged 18-64 yr, were randomly divided into 4 groups ( n = 15 each): Ⅰ benign tumor group (group B,3 × ED95 ); Ⅱ -Ⅳ different dose cisatracurium group (group C1 (2 × ED95 ), C2 (3 × ED95 ) and C3 (4 ×ED95)). Neuromuscular block was assessed with accelerograph F (TOF-watch SX). Single stimulation of ulnar nerve was used. Anesthesia was induced with TCI of propofol (target plasma concentration 3 μg/ml) and remifentanil (target effect-site concentration 3 ng/ml). Tracheal intubation was facilitated with cisatracurium 0.15 mg/kg in group B, and with cisatracurium 0.10, 0.15 and 0.20 mg/kg in group C1, C2 and C3 respectively. The onset time, clinical duration, time for recovery of T/Tc to 75 % and recovery index were recorded. Results The clinical duration, time for recovery of T/Tc to 75 % and recovery index were significantly longer in group C2 than in group B (P ＜ 0.05). The onset time was significantly shorter, while the clinical duration and time for recovery of T/Tc to 75% were significantly longer in group C2 and C3 than in group C1 , and in group C3 than in group C2 ( P ＜0.05) .Conclusion The duration of action and recovery times of cisatracurium were prolonged in patients with malignant tumor.

Objective To investigate the effects of fentanyl and remifentanil on the viability of human adenocarcinoma cell line A549.Methods Human adenocarcinoma A549 cells cultured in logarithmic growth phase were seeded in 75 ml culture bottles or 96-well plates.After being cultured for 24 h,the cells were randomly divided into 9 groups (n =30 each):4 fentanyl groups (groups F1-4 ),4 remifentanil groups (groups RF1-4 ) and control group (group C).Groups F1-4 were exposed to fentanyl with the final concentrations of 0.5,5.0,50.0 and 500.0 ng/ml respectively.Groups RF1-4 were exposed to remifentanil with the final concentrations of 0.5,5.0,50.0 and 500.0 ng/ml respectively.The viability of the cells was determined by methyl thiazolyl tetrazolium assay after being incubated for 24,48 and 72 h.The cell cycle progression and apoptosis were determined by flow cytometry after being incubated for 24 h.Results Compared with group C,the viability of A549 cells were gradually decreased at 72 h of incubation,the proportion of the cells in S phase was gradually decreased at 24 h of incubation,and the proportion of the cells in G2/M phase and apoptotic rate were gradually increased in groups F2-4 and in groups RF2-4 ( P ＜ 0.05).Conclusion Fentanyl and remifentanil with the final concentration ≥5 ng/ml can inhibit the viability of human adenocarcinoma cell line A549 in a dose-independent manner by inducing cell apoptosis and cell cycle arrest in G2/M phase.

Aim To investigate the effects of 6% hydroxyethyl starch 130/0.4(6%HES 130/0.4)and Ringer's solution resuscitation on early lung injury in hemorrhagic shock rats and its mechanisms.Methods Twenty-four male SD rats were divided into 4 groups:sham,Ringer's solution(RS),two HES groups(H1,H2).Group H1,H2 received HES 33,50 ml·kg~(-1) and Ringer's solutions respectively after 90-minute shock(the dose of Ringer's solutions was 3 times as muchas the maximum shed blood volume minus the dose of HES).Blood samples were taken from artery for blood analysis and the expression of CD11b/CD18 at T_0,T_1,T_4,T_5.The lungs were removed for ultrastructure examination.Results PaO_2 increased in group H1 at T_(1～5) and group H2 at T_5 as compared with T_0.PaCO_2 decreased in all the resusitation groups.The ultrastructure was basically normal except that the mitochondria changed slightly in group H1.In group H2,the perinuclear space was dilated slightly and the rough endoplasmic reticulum expanded slightly,and the degranulation was observed.Compared with group RS,the expressions of CD11b and CD18 decreased at T_4,T_5;compared with group H1,the expressions of CD11b and CD18 in group H2 increased.Conclusions Treatment with 6%HES(130/0.4)33 ml·kg~(-1)and Ringer's solution can attenuate hemorrhagic shock,and the resuscitation reduces lung injury through inhibition of expressions of CD11b and CD18.

Objective To investigate the effects of sufentanil,remifentanil and fentanyl oH cellular immune function in patients undergoing radical resection of esophageal cancer.Methods Forty-five ASA Ⅰ or Ⅱpatients aged 45-64 yr undergoing radical resection of esophageal cancer were randomly divided into 3 groups(n=15 each):sufentanil group(SF);remifentanil group(RF)and fentanyl group(F).The patients were premedicated with iv atropine 0.5 mg.Anesthesia was induced with midazolam 0.04 mg/kg,propofol TCI(CT=3μg/ml)and TCI of sufentanil,remifentanil or fentanyl(CT=0.5,5 and 5 ng,ml respectively in the 3 groups).Endobronchial intubation was facilitated with vecuronium 0.1 mg/kg.The patients were mechanically ventilated.PETCO2 was maintained at 30-40 mm Hg.Anesthesia was maintained with inhalation of sevoflurane(0.7-1.5 MAC)and TCI of sufentanil,remifentanil or fentanyl(CT=0.5,5 and 5 ng/ml respectively).Venous blood samples were taken from peripheral vein before anesthesia(T0,baseline),60 min after skin incision(T1),immediately(T2),24 h(T3)and 72 h(T4)after the end of operation for determination of the expression of CD3+,CIM+,CD8+on T cells and CD3-CD16+CD56+on natural killer cells by flow cytometry,CD4+/CD8+ratio,serum concentrations of IL-2 and IL-10 by ELISA.Results Compared with the baseline values,the CD4+T-lymphocytes and CIM+/CD8+ratio were significantly decreased at T2,while the CD3-CD16+CD56+NK cells were significantly increased in all 3 groups.The CD3+T-lymphocytes were significantly decreased at T2 as compared to the baseline value at T0 in SF and RF groups.The CIM+and CD3+T-lymphocytes were significantly decreased at T3 as compared with the baseline value in all 3 groups.Serum IL-2 concentration was significantly higher at T3 in SF group than in RF group.Serum IL-10 concentration was sismficantly higher at T4 in RF group than in SF group.Conclusion Sufentanil,remifentanil and fentanyl can depress cenular immune function to some extent in patients undergoing radical resection of esophageal cancer.