Effect of CYP3A4 and CYP3A5 genetic polymorphism on individualized application of fentanyl in thoracoscopic surgery
Abstract Background: Studies have confirmed that CYP3A4 and CYP3A5 genotypes affect fentanyl metabolism in vivo. This study explores the application value of CYP3A4 and CYP3A5 genetic polymorphism in the individualized use of fentanyl in thoracoscopic surgery. Patients and Methods: One hundred American Society of Anesthesiologists physical status I or II patients, aged 40–65 years, with a body mass index of <30 kg/㎡ were scheduled for thoracoscopic surgery for lung cancer under general anesthesia. The patients were divided into the wild homozygote group (group I), heterozygote group (group II), and mutant homozygote group (group III) according to gene detection results. The induction dose of fentanyl was 6 µg/kg, 5 µg/kg, and 4 µg/kg, respectively; the background infusion rate of patient-controlled intravenous analgesia (PCIA) was 2 mL/h, 1.5 mL/h, and 1 mL/h, respectively; the patient-controlled analgesia (PCA) dose was 2 mL, 1.5 mL, and 1 mL, respectively; the locking time was 15 min; and the visual analog scale (VAS) score of ≤ 3 was used as the effective analgesia. The operation and recovery times were recorded. Surgical plethysmography index (SPI) and blood glucose levels were recorded on admission, immediately after tracheal intubation, during skin cutting, during surgery for 1 h, and during skin suturing. Furthermore, the VAS and Bruggemann comfort scale (BCS) scores were recorded in the resting states of immediate consciousness and 6 h, 12 h, 24 h, and 48 h after the operation. The total fentanyl consumption, the effective times of PCIA compression, and the incidence of adverse drug reactions (nausea, vomiting, itching, sleepiness, and respiratory depression) were recorded during the operation and within 48 h after the operation. Results: No significant intergroup differences in terms of SPI and blood glucose levels (p > 0.05) were observed. No statistically significant difference in VAS and BCS scores was found after operation (p > 0.05). The intraoperative and postoperative fentanyl doses and the amount of effective PCA decreased in all groups (p < 0.05). There were no significant differences in the incidence of adverse reactions within 48 h after surgery between all groups (p > 0.05). Conclusion: This study suggests that it is feasible to use individualized application of fentanyl according to CYP3A4 and CYP3A5 genotypes