Objective To investigate the effect of penehyclidime hydrochloride as the preanesthetic medication for general anesthesia, and also to provide evidence for clinical practice. Methods We searched The Cochrane library (2007, Issue 3), MEDLINE (1966 to 2007), EMBASE (1988 to 2007), CBM (1978 to 2007), VIP (1989 to 2007) and CNKI (1994 to 2007). Randomised trials comparing penehyclidime hydrochloride with other drugs were collected. Quality assessment and data extraction were performed. Results A total of 23 trials were included, and the quality of all studies was low. Among them, 11 trials compared penehyclidime hydrochloride with atropine, of which only 2 measured the airway secretion volume and indicated that the airway secretion volume was smaller in the penehyclidime hydrochloride group than that in the atropine group (WMD –8.00, 95%CI –8.16 to –7.85, Plt;0.000 01). Twelve trials compared penehyclidime hydrochloride with scopolamine, of which only 2 measured the airway secretion volume and revealed no significant difference between the two groups (WMD –17.07, 95%CI –45.49 to 11.35, P=0.24). Three trials compared penehyclidime hydrochloride with placebo, which showed that the airway secretion volume was smaller in the penehyclidime hydrochloride group than that in the placebo group (WMD –10.60, 95%CI –13.64 to –7.56, Plt;0.000 01). No significant adverse drug reactions were found. Conclusion Current evidence suggested that penehyclidime hydrochloride was not inferior to other drugs in decreasing airway secretion and keeping heart rate stable.
Objective To observe the effects of epidural anaesthesia (EA) and general anaesthesia (GA) on the changes of plasma epinephrine (E) and norepinephrine (NE) during laparoscopic cholecystectomy (LC). Methods Thirty patients undergoing elective LC were randomly divided into GA group (n＝15) and EA group (n＝15). The concentrations of plasma NE and E were measured at the following phases: before anaesthesia, before introducing pneumoperitoneum, during pneumoperitoneum, and at the end of operation. Results In EA group, the concentrations of NE weren′t significantly different at each phase, the concentrations of E significantly increased before and during pneumoperitoneum (Ｐ＜0.05) and returned to the baseline at the end of operation (Ｐ＞0.05). In GA group, the concentrations of NE and E didn′t change significantly before pneumoperitoneum, but increased during pneumoperitoneum (Ｐ＜0.05) and E didn′t return to the baseline at the end of operation (Ｐ＜0.05). The E concentrations of EA group was higher than that of GA group before pneumoperitoneum, but the NE concentration of EA group was lower than that of GA group during pneumoperitoneum (Ｐ＜0.05). Conclusion Both groups has significant stress reaction, but the stress reaction of EA group is weaker than that of GA group during LC.