Intravenous Lidocaine on Chronic Pain in Patients Undergoing Hepatectomy

This study is a further observation and follow-up of the patients enrolled in the registration number NCT04295330 to further evaluate the effect of long-term infusion of lidocaine on postoperative chronic pain, long-term quality of life and survival rate in patients undergoing liver cancer surgery.

This study is a further observation and follow-up of the patients enrolled in the registration number NCT04295330 to further evaluate the effect of long-term infusion of lidocaine on postoperative chronic pain, long-term quality of life and survival rate in patients undergoing liver cancer surgery. 272 patients with primary liver cancer who meet the inclusion criteria are included. According to the random number, the patients are divided into lidocaine group and conventional analgesia group.In the lidocaine group, a bolus injection of lidocaine 1.5 mg/kg, given as an infusion over 10 minutes, followed by a continuous infusion of lidocaine at 1.5 mg/kg per hour for the whole surgical procedure and will be discontinued at the end of surgery. Postoperative pain management during the first 72 postoperative hours will involve the use of a PCIA device, which will contain lidocaine , sufentanil , granisetron diluted to 200 mL in 0.9 % normal saline. In the placebo group, the same volume of normal saline instead of lidocaine will be administered. Blood samples will be drawn immediately after the bolus infusion of lidocaine, at the end of surgery, and 24 hours after surgery to measure plasma lidocaine concentrations. Blood samples will also be collected at 24 hours after surgery for subsequent measurement of inflammatory factors. Numeric rating scale(NRS) is used to evaluate pain at rest and light activities at postoperative 24, 48, 72 hours. The recovery time of postoperative gastrointestinal function, length of hospital stay, and the incidence of lidocaine toxicity within postoperative 72 hours will be recorded. Follow-up after discharge includes chronic pain, the impact of chronic pain on quality of life, the relapse-free survival and overall survival from postoperative 3 months to 5 years.