Effects of oral premedication with clonidine on stress response during tracheal extubation / 中国临床药理学与治疗学

AIM: To investigate the effect of premedication with clonid in e on the concentrations of catecholamine (CA), angiotention Ⅱ (AⅡ), cortisol a nd carbohydrate metabolism during tracheal extubation. METHODS: Twenty-two patients scheduled for general anesthesia with tracheal intubation were randomly divided into two groups: clonidine group and control group. Oral p remedication with clonidine 5 ?g?kg -1 was taken in clonidine group 6 0 min before anesthesia induction in addition to some common premedication in bo th groups. The change of hemodynamics,arterial plasma concentrations of CA, A Ⅱ, cortisol, blood sugar and lactic acid were measured before anesthesia, befor e intubation and 1,2,5, 10 min after tracheal extubation, respectively. RESULTS: The levels of CA, AⅡ, cotisol, blood sugar and lactic acid were significantly increased during tracheal extubation in both groups,but the levels in control group were higher than those in clonidine group. The change of hemodynamics was more stable in clonidine group than that in control group. CONCLUSION: Oral premedication with clonidine can alleviate stress response during tracheal extubation.

Influence of oral premedication clonidine on the stress response during cardiopulmonary bypass / 中华麻醉学杂志

To investigate the effect of premedication with clonidine on the concentrations of plasma catecholamine (CA), renin, angiotension Ⅱ (A Ⅱ ) and carbohydrate metabolism during eardiopulmonary bypass (CPB). Method: Twenty patients scheduled for cardiac surgery were randomly divided into two groups: clonidine group and control group. Oral premedication with clonidine 5?g?kg~(-1) was taken in colndine group 60 rain before anesthesia in duction in addition to common same premedication in both groups. Arterial plasma concentrations of CA,renin, AⅡ, blood suger, pyruvic acid, lactic acid were measured before anesthesia, before CPB, 30,60,90 and 120 min following CPB and 30 rain after CPB. Result: The levels of CA, blood suger, pyruvic acid and lactic acid increased significantly during CPB in both groups, but were higher markedly in control group than those in clonidine group (P