RESUMEN
Objective To explore effect of CYP3A4 gene polymorphism and genetic testing on the efficacy of fentanyl in patients with extensive burns.Methods A prospective randomized controlled study, 149 patients with extensive burns were picked from Feburary to July in 2015.Patients were randomly divided into matched group ( n=56 ) and experimental group ( n=93 ) . The matched group was treated with fentanyl 5 g/kg to finish implementation of anesthesia induction.Depends on the gene detection results, the patients in experimental group were treated with 6 g/kg, 5 g/kg or 4 g/kg fentanyl.The VAS score at different time after operation in the experimental group and the control group were compared , and the dosage of fentanyl was observed.Patients whose VAS score was greater than 7 should treated with intramuscular injection of pethidine 100 mg, recorded all patients with pethidine,s additional cases and the times.At the same time, the adverse reactions of the two groups were recorded before and after hospital discharge. ResuIts The score of VAS was not significantly different after wake up immediatly after the surgery , and the score of VAS was significantly lower in the experimental group patients in 6h,12h after the surgery (P<0.05).The dosage of fentanyl in the experimental group and the number of the cases and the times were significantly decreased (P<0.05).The adverse reactions after the surgery such as nausea, vomiting, itching, drowsiness, and adverse reactions were significantly lower in the experimental group (P<0.05).ConcIusion CYP3A4 gene detection in patients with large area of burn in the individual drug use is important, because of patients’ genotype adjusting fentanyl dosagecan, it enhances significantly the analgesic effect, reduces the amount of drug use, and effectively reduces the adverse reactions.