This study is a further observation and follow-up of the patients enrolled in the registration number ChiCTR230007164430 to further evaluate the effect of long-term infusion of esketamine and lidocaine on postoperative chronic pain, long-term quality of life and survival rate in patients undergoing hepatectomy.
Aged 18-75 years;
Scheduled for elective hepatectomy;
ASA grade I-III.
Patients who have been intubated in the ICU following surgery and do not have a planned extubation within 6 hours postoperatively.
Patients with a body weight less than 40 kg or greater than 100 kg.
Patients with cardiac conduction system abnormalities (second- or third-degree atrioventricular block) or cardiac insufficiency (left ventricular ejection fraction < 50%).
Patients with severe hepatic insufficiency (alanine aminotransferase [ALT], aspartate aminotransferase [AST], or bilirubin levels more than 2.5 times the upper limit of normal) or renal insufficiency (creatinine clearance rate < 60 mL/min).
Parallel
Esketamine-lidocaine group
DrugIn the esketamine-lidocaine group, patients received esketamine (0.25 mg/kg) and lidocaine (1.5 mg/kg) at the induction of anesthesia, followed by the continuous infusion of esketamine (0.02 mg/kg∙h) and lidocaine (1.5 mg/kg∙h) until the end of surgery. Postoperatively, the patients received two pumps. One pump delivered a fixed-rate infusion of lidocaine at 1.0 mg.kg-1.h-1 and esketamine at 0.02 mg.kg-1.h-1 infusion for 72 hours. Another PCIA device contained sufentanil 2 ug/kg, granisetron 12 mg diluted to 200 mL in 0.9 % normal saline.
Placebo group
Other interventionIn the conventional analgesia group, patients received the same volume of normal saline instead of lidocaine and esketamine until the end of surgery. Postoperatively, the paitents received two pumps. One pump was the same volume of normal saline instead of lidocaine and esketamine. Another PCIA device contained sufentanil 2 ug/kg, granisetron 12 mg diluted to 200 mL in 0.9 % normal saline.
The incidence of chronic pain at 3 months postoperatively
Chronic pain is defined as pain that lasts or recurs for longer than 3 months. For chronic postsurgical pain(CPSP), it mainly refers to the pain that persists past normal healing time. Pain scoring is performed at 3 months using the Numerical Rating Scale(NRS), with 11 digits ranging from 0 to 10 indicating the degree of pain,0 indicating no pain, and 10 indicating severe pain. Subjects choose a number to indicate the degree of pain based on their personal pain experience. The impact of chronic pain on the quality of life is also assessed by Brief Pain Inventory score.
The incidence of chronic pain at 6 months and 1 year postoperatively
Chronic pain is defined as pain that lasts or recurs for longer than 3 months. For chronic postsurgical pain(CPSP), it mainly refers to the pain that persists past normal healing time. Pain scoring is performed at 3 months using the Numerical Rating Scale(NRS), with 11 digits ranging from 0 to 10 indicating the degree of pain,0 indicating no pain, and 10 indicating severe pain. Subjects choose a number to indicate the degree of pain based on their personal pain experience. The impact of chronic pain on the quality of life is also assessed by Brief Pain Inventory score.
Overall survival after surgery
Overall survival is defined as the time between the date from surgery to the date of death.
Recurrence-free survival after surgery
Postoperative re-examination is based on the diagnosis of enhanced CT, MRI, ultrasound or blood examination to determine whether the patient has recurrence and metastasis. Recurrence-free time refers to the time from surgery to tumor recurrence based on the above CT, MRI, etc.
Disability-free surviva survival
Patient self-assessment is carried out by using the World Health Organization(WHO) Disability Scale, with a minimum score of 12 points and a maximum score of 60 points. The lower the score, the higher the quality of life.
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