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  • Title: [Evaluation of the synergism between ketorolac and morphine in the treatment of postoperative pain].
    Author: Casali R, Girardi G, Mediati RD, Livi P, Novelli GP.
    Journal: Minerva Anestesiol; 1995 Dec; 61(12):501-7. PubMed ID: 8919987.
    Abstract:
    BACKGROUND: The aim of the study is to determine what concentration of ketorolac and morphine administered together i.v. achieve best synergic effect between NSAID antiinflammatory and opioids analgesic properties. DESIGN: Randomized comparative study was carried out on 180 patients, ASA II-IV, undergoing major general surgery, in an University Clinic. METHODS: Postoperative pain therapy by i.v. PCA: group 1 morphine 0.75 mg.ml + ketorolac 0.75 mg.ml; group 2 morphine 0.50 mg.ml + ketorolac 1.50 mg.ml; group 3 morphine 0.25 mg.ml + ketorolac 1.50 mg.ml; in saline solution. Initial bolus: 2 ml. Continuous infusion 1.5 ml.h. Demand bolus: 0.2 ml. Lockout time: 30 minutes. Evaluations included: pain intensity (T0, T3, T18); total amount of infused drugs (T18); number of valid demands and attempts (T18); amount of autoadministered analgesic drugs in percent of highest available amount (T18); side effects (T18); patient's judgment. DATA ANALYSIS: ANOVA and Student's "t"-test. RESULTS: A statistically significant reduction of pain intensity was found after 3 and 18 hours in the three groups, no differences were found among the groups. Group 2 required an amount of autoadministered drugs significantly lower than other groups. Rare side effects. Patient's judgment was generally positive. CONCLUSIONS: Results suggest a greater synergetic effect between morphine and ketorolac in concentrations used in group 2.
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