Liver Cancer Clinical Trial
Official title:
Dexmedetomidine-esketamine Combined With Oxycodone for Ultrasound-guided Percutaneous Radiofrequency Ablation in Patients With Liver Cancer: a Randomized Controlled Study
Percutaneous radiofrequency ablation is a commonly treatment for patients with liver cancer that cannot be surgically resected. During the procedure, patients need to keep awake and cooperate with the procedure, including deep breath and hold breath. However, intolerable pain generated during puncture and radiofrequency heating may cause body movements and interfere the procedure. Oxycodone is frequently used for analgesia but still insufficient. A recent study showed that dexmedetomidine-esketamine combination improves analgesia without increasing adverse events. After stopping infusion, the analgesic/sleep-promoting effects of dexmedetomidine-esketamine seemed to last for up to 24 hours. The investigators hypothesize that dexmedetomidine-esketamine combination as a supplement to oxycodone will improve sedation and analgesia in patients undergoing radiofrequency liver ablation of the liver.
Ultrasound-guided percutaneous radiofrequency ablation is a new technique to treat liver cancer. Under ultrasound guidance, a radiofrequency electrode needle is inserted into the cancer through which local high temperature is generated to coagulate and necrose the cancer tissue. Percutaneous radiofrequency ablation is currently recognized as the best treatment for patients with liver cancer that cannot be surgically resected. During the procedure, patients need to keep awake and cooperate with the procedure, including deep breath and hold breath. However, intolerable pain generated during puncture and radiofrequency heating may cause body movements and interfere the procedure. Oxycodone is a widely used opioid. It activates the μ and κ receptors and relieves pain including visceral pain, which makes it suitable for analgesia during radiofrequency ablation. However, due to the strong stimulation of radiofrequency liver ablation, supplemental analgesics are often required to improve patient cooperation. As a commonly used supplement, remifentanil is also a μ receptor agonist that quickly reaches blood-brain balance in about 1 minute in and is rapidly hydrolyzed in tissues and blood. The problems with remifentanil are the ultra-short action and pain allergy after stopping infusion. The burning pain after percutaneous liver radiofrequency ablation may last for up to 24 hours. Dexmedetomidine is a highly selective α2-adrenergic receptor agonist that has sedative, anxiolytic, and analgesic effects. Ketamine is a non-competitive N-methyl-D-aspartate (NMDA) receptor antagonist that is widely used in pediatric anesthesia and postoperative analgesia. Recent studies found that low-dose ketamine also has antidepressant and sleep promoting effects. Esketamine is the S-enantiomer of racemic ketamine with a higher affinity for NMDA receptors and is approximately twice as potent as racemic ketamine in analgesia. A recent study showed that dexmedetomidine-esketamine combination improves analgesia without increasing adverse events. After stopping infusion, the analgesic and sleep-promoting effects of dexmedetomidine-esketamine seemed to last for up to 24 hours. The investigators hypothesize that dexmedetomidine-esketamine combination as a supplement to oxycodone will improve sedation and analgesia in patients undergoing radiofrequency liver ablation of the liver. ;
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