Airway reactions and emergence times in general laryngeal mask airway anaesthesia: a meta-analysis.

BACKGROUND: Desflurane's short emergence time supports fast track anaesthesia. Data on the rate of upper airway complications and emergence time when desflurane is used with laryngeal mask airway (LMA) are controversial and limited. OBJECTIVES: To compare recovery time variables and the rates of upper airway adverse events in patients with an LMA undergoing general surgery with desflurane, sevoflurane, isoflurane or propofol anaesthesia. DESIGN: A systematic review and meta-analysis of randomised controlled trials (RCTs). DATA SOURCES: A systematic search for eligible RCTs in Embase (Elsevier) and in PubMed (National Library of Medicine) databases up to September 2013. ELIGIBILITY CRITERIA: RCTs investigating the rates of cough overall, cough at emergence, laryngospasm, time to eye opening, time to removal of the LMA, time to respond to command and time to state date of birth in patients with an LMA, during emergence from desflurane, sevoflurane, isoflurane or propofol anaesthesia. RESULTS: Thirteen RCTs were included and analysed. We found a strong interstudy variability. There was no difference in the rates of upper airway events between desflurane and sevoflurane or between desflurane and a control group consisting of all the other anaesthetics combined. Comparing desflurane (n = 284) with all other anaesthetic groups (n = 313), the risk ratio [95% confidence interval (95% CI)] was 1.12 (0.63 to 2.02, P = 0.70). Cough at emergence was only measured in patients receiving desflurane (n = 148) and sevoflurane (n = 146): the risk ratio (95% CI) was 1.49 (0.55 to 4.02, P = 0.43). Laryngospasm was rare and there was no significant difference in its incidence when desflurane (n = 262) was compared with all other anaesthetics combined (n = 289; risk ratio 1.03; 95% CI 0.33 to 3.20, P = 0.96). The times of all emergence variables were significantly faster in the desflurane group than in all other groups. CONCLUSION: When using an LMA, upper airway adverse reactions in association with desflurane anaesthesia were no different from those noted with sevoflurane, isoflurane or propofol anaesthesia. Emergence from general anaesthesia with desflurane is significantly faster than all the other anaesthetics. Due to interstudy variations and the small size of the trials, further large-scale, multicentre studies are required to confirm or refute the results of this meta-analysis.

Reduced P-selectin expression on circulating platelets after prolonged cold preservation in renal transplantation.

The uremic state in patients with terminal renal insufficiency is accompanied by a bleeding tendency connected with platelet dysfunction. Prolonged cold ischemia and inflammatory interactions between leukocytes, platelets and endothelial cells contribute to ischemia-/reperfusion (I/R) injury and may impair long-term graft survival. We evaluated the influence of the duration of cold preservation time on the expression of platelet GPIIb/IIIa and P-selectin and on the formation of leukocyte-platelet complexes after kidney transplantation. Fourteen patients undergoing kidney transplantation were divided into group I with long preservation time (26.6 +/- 1.9 h) and group II with short preservation time (8 +/- 6.1 h). Five venous blood samples (3 ml) were taken before induction of anesthesia, 12 h, 2, 7 and 14 d after transplantation. Surface expression of the GPIIb/IIIa, P-selectin and the percentage of platelet-granulocyte complexes were quantified by flow cytometry. Additionally blood from seven healthy volunteers was analyzed. GPIIb/IIIa and P-selectin expression on circulating platelets were significantly decreased in the long and the short-term graft preservation group compared with healthy volunteers. A significantly reduced P-selectin expression was found in the long-term preservation group compared with the short-term group. The percentage of platelet-granulocyte complexes also decreased in both preservation groups in the first 2 d after reperfusion and remained in this state in the long-term preservation group. Reduced expression of P-selectin on circulating platelets may be an indicator of I/R injury after prolonged kidney graft preservation.

The effect of propofol on respiratory burst of polymorphonuclear leukocytes of different preparation / 中华麻醉学杂志

Objective To study the effect of propofol on the respiratory burst (RB) of polymorphonuclear leukocytes (PMNL) and determine the difference between the result of two methods of PMNL preparation (Ficoll method vs. whole blood method) . Methods PMNLs prepared with Ficoll solution or with whole blood were incubated with two concentrations of propofol (therapeutic concentration and 10 times this concentration) .E coli, N-formyl-methionyl-leucylphenylalanine (FMLP) or phorbol-myristate acetate (PMA) was employed to stimulate the respiratory burst of PMNL and the percentage of PMNL with RB was detected by flow cytometry. Results In the Ficoll group 6 ?g?ml-1 and 60?g?ml-1 propofol significantly decreased the RB activity of PMNL stimulated with FMLP (P