Analgesic Effects of Low-dose S-ketamine in Major Spine Fusion Surgery
NCT ID: NCT04964219
Last Updated: 2025-07-30
Study Results
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Basic Information
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COMPLETED
PHASE4
164 participants
INTERVENTIONAL
2022-02-08
2025-05-02
Brief Summary
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This randomized controlled trial is designed to investigate whether perioperative S-ketamine infusion can decrease pain intensity after major spine fusion surgery.
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Detailed Description
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High-dose opioids are associated with adverse effects including respiratory depression, sedation, nausea and vomiting, pruritus, and constipation, which are harmful for early postoperative recovery. A previous study showed that about 50% of patients are taking opioids for chronic pain at 3 months after spinal fusion surgery. Chronic pain is considered to be a result of poorly controlled acute postoperative pain. Thus, multimodal analgesia aiming at improving analgesia while decreasing opioid consumption is advocated to control acute postsurgical pain, in order to promote perioperative recovery and prevent chronic pain.
Racemic ketamine, a commonly used N-methyl-D-aspartate receptor antagonist, is a mixture of equal parts of two optical isomers including R-(-)-ketamine and S-(+)-ketamine. It has prominent analgesic effects through activating receptors both in the brain and in the spinal cord, inhibiting the excitatory postsynaptic potential, and thus blunting nociception transmission. Additionally, studies also showed that, when used within the appropriate time, ketamine reduces pain-related sensitization that aggravates postoperative pain. Thus, ketamine is recommended as a part of a multimodal analgesia regimen in clinical practice, especially for patients undergoing major orthopedic surgery. However, the reported psychotropic side effects limit the clinical use of racemic ketamine.
S-ketamine, an S-isomer of ketamine, is twice as potent as the racemic mixture in analgesia, and produces fewer side effects than the racemic ketamine. How, there are only a few studies exploring analgesic effect of S-ketamine in spine fusion surgery. In opioid-dependent patients, Nielsen et al. reported that intraoperative S-ketamine infusion reduced opioid consumption within 24 hours and relieved back pain intensity at 6 months, it also decreased the daily opioid use at 1 year after spinal surgery. On the other hand, the study of Brinck et al. did not found any superiority of intraoperative S-ketamine in reducing oxycodone consumption within 48 hours after lumbar fusion surgery in opioid-naive patients.
Considering these inconsistent results, the effects of S-ketamine in spinal surgery require further clarification. This trial is designed to investigate the analgesic effect of S-ketamine infused both intraoperatively and postoperatively in patients undergoing multi-segment spine infusion surgery.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
TRIPLE
Study Groups
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S-ketamine group
After anesthesia induction, a bolus of 0.15 mg/kg S-ketamine is injected intravenously about 30 min before incision; this is followed by a continuous infusion at a rate of 0.15 mg/kg/h until 1 hour before the end of surgery.
After surgery, patient-controlled analgesia is provided. The pump is established with S-ketamine 25 mg, dexmedetomidine 100 microgram, and sufentanil 100 microgram, diluted with normal saline to 100 ml. The pump is programmed to deliver 2-ml boluses with a background infusion rate at 1 ml /h and a 10-min lockout interval.
S-ketamine
After anesthesia induction, a bolus of 0.15 mg/kg S-ketamine is injected intravenously about 30 min before incision; this is followed by a continuous infusion at a rate of 0.15 mg/kg/h until 1 hour before the end of surgery.
After surgery, patient-controlled analgesia is provided. The pump is established with S-ketamine 25 mg, dexmedetomidine 100 microgram, and sufentanil 100 microgram, diluted with normal saline to 100 ml. The pump is programmed to deliver 2-ml boluses with a background infusion rate at 1 ml /h and a 10-min lockout interval.
Control group
After anesthesia induction, a bolus of placebo (normal saline) in the same volume is injected intravenously about 30 min before incision; this is followed by a continuous infusion of placebo at the same rate until 1 hour before the end of surgery.
After surgery, patient-controlled analgesia is provided. The pump is established with placebo, dexmedetomidine 100 microgram and sufentanil 100 microgram, diluted with normal saline to 100 ml. The pump is programmed to deliver 2-ml boluses with a background infusion rate at 1 ml /h and a 10-min lockout interval.
Placebo
After anesthesia induction, a bolus of placebo (normal saline) in the same volume is injected intravenously about 30 min before incision; this is followed by a continuous infusion of placebo at the same rate until 1 hour before the end of surgery.
After surgery, patient-controlled analgesia is provided. The pump is established with placebo, dexmedetomidine 100 microgram and sufentanil 100 microgram, diluted with normal saline to 100 ml. The pump is programmed to deliver 2-ml boluses with a background infusion rate at 1 ml /h and a 10-min lockout interval.
Interventions
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S-ketamine
After anesthesia induction, a bolus of 0.15 mg/kg S-ketamine is injected intravenously about 30 min before incision; this is followed by a continuous infusion at a rate of 0.15 mg/kg/h until 1 hour before the end of surgery.
After surgery, patient-controlled analgesia is provided. The pump is established with S-ketamine 25 mg, dexmedetomidine 100 microgram, and sufentanil 100 microgram, diluted with normal saline to 100 ml. The pump is programmed to deliver 2-ml boluses with a background infusion rate at 1 ml /h and a 10-min lockout interval.
Placebo
After anesthesia induction, a bolus of placebo (normal saline) in the same volume is injected intravenously about 30 min before incision; this is followed by a continuous infusion of placebo at the same rate until 1 hour before the end of surgery.
After surgery, patient-controlled analgesia is provided. The pump is established with placebo, dexmedetomidine 100 microgram and sufentanil 100 microgram, diluted with normal saline to 100 ml. The pump is programmed to deliver 2-ml boluses with a background infusion rate at 1 ml /h and a 10-min lockout interval.
Eligibility Criteria
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Inclusion Criteria
* Scheduled to undergo multi-segment (≥2) spine fusion surgery.
* Agreed to receive postoperative patient-controlled analgesia.
Exclusion Criteria
* Poor blood pressure control in those with hypertension (BP \>160/100 mmHg in the ward).
* Previous history of hyperthyroidism or pheochromocytoma.
* Previous history of schizophrenia, epilepsy or Parkinson disease.
* History of sick sinus syndrome, bradycardia (HR \<50 beat per min), or atrioventricular block of grade II or higher without pacemaker.
* Severe heart dysfunction (New York Heart Association functional classification 4), hepatic insufficiency (Child-Pugh grade C), renal insufficiency (serum creatinine of 442 μmol/L or above, or requirement of renal replacement therapy), or ASA classification IV or above.
* Unable to complete preoperative assessment due to severe dementia or language barrier.
* Any other conditions that were considered unsuitable for the study participation.
18 Years
80 Years
ALL
No
Sponsors
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Peking University First Hospital
OTHER
Responsible Party
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Dong-Xin Wang
Professor
Principal Investigators
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Dong-Xin Wang, MD, PhD
Role: PRINCIPAL_INVESTIGATOR
Peking University First Hospital
Locations
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Beijing University First Hospital
Beijing, Beijing Municipality, China
Countries
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References
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Gerbershagen HJ, Aduckathil S, van Wijck AJ, Peelen LM, Kalkman CJ, Meissner W. Pain intensity on the first day after surgery: a prospective cohort study comparing 179 surgical procedures. Anesthesiology. 2013 Apr;118(4):934-44. doi: 10.1097/ALN.0b013e31828866b3.
Stein C. New concepts in opioid analgesia. Expert Opin Investig Drugs. 2018 Oct;27(10):765-775. doi: 10.1080/13543784.2018.1516204. Epub 2018 Sep 7.
Connolly J 3rd, Javed Z, Raji MA, Chan W, Kuo YF, Baillargeon J. Predictors of Long-term Opioid Use Following Lumbar Fusion Surgery. Spine (Phila Pa 1976). 2017 Sep 15;42(18):1405-1411. doi: 10.1097/BRS.0000000000002133.
Ocay DD, Li MMJ, Ingelmo P, Ouellet JA, Page MG, Ferland CE. Predicting Acute Postoperative Pain Trajectories and Long-Term Outcomes of Adolescents after Spinal Fusion Surgery. Pain Res Manag. 2020 Feb 24;2020:9874739. doi: 10.1155/2020/9874739. eCollection 2020.
Cozowicz C, Bekeris J, Poeran J, Zubizarreta N, Schwenk E, Girardi F, Memtsoudis SG. Multimodal Pain Management and Postoperative Outcomes in Lumbar Spine Fusion Surgery: A Population-based Cohort Study. Spine (Phila Pa 1976). 2020 May 1;45(9):580-589. doi: 10.1097/BRS.0000000000003320.
Walker CT, Gullotti DM, Prendergast V, Radosevich J, Grimm D, Cole TS, Godzik J, Patel AA, Whiting AC, Little A, Uribe JS, Kakarla UK, Turner JD. Implementation of a Standardized Multimodal Postoperative Analgesia Protocol Improves Pain Control, Reduces Opioid Consumption, and Shortens Length of Hospital Stay After Posterior Lumbar Spinal Fusion. Neurosurgery. 2020 Jul 1;87(1):130-136. doi: 10.1093/neuros/nyz312.
Doan LV, Wang J. An Update on the Basic and Clinical Science of Ketamine Analgesia. Clin J Pain. 2018 Nov;34(11):1077-1088. doi: 10.1097/AJP.0000000000000635.
Brinck EC, Tiippana E, Heesen M, Bell RF, Straube S, Moore RA, Kontinen V. Perioperative intravenous ketamine for acute postoperative pain in adults. Cochrane Database Syst Rev. 2018 Dec 20;12(12):CD012033. doi: 10.1002/14651858.CD012033.pub4.
Park PJ, Makhni MC, Cerpa M, Lehman RA, Lenke LG. The role of perioperative ketamine in postoperative pain control following spinal surgery. J Spine Surg. 2020 Sep;6(3):591-597. doi: 10.21037/jss-19-306.
Avidan MS, Maybrier HR, Abdallah AB, Jacobsohn E, Vlisides PE, Pryor KO, Veselis RA, Grocott HP, Emmert DA, Rogers EM, Downey RJ, Yulico H, Noh GJ, Lee YH, Waszynski CM, Arya VK, Pagel PS, Hudetz JA, Muench MR, Fritz BA, Waberski W, Inouye SK, Mashour GA; PODCAST Research Group. Intraoperative ketamine for prevention of postoperative delirium or pain after major surgery in older adults: an international, multicentre, double-blind, randomised clinical trial. Lancet. 2017 Jul 15;390(10091):267-275. doi: 10.1016/S0140-6736(17)31467-8. Epub 2017 May 30.
Arendt-Nielsen L, Nielsen J, Petersen-Felix S, Schnider TW, Zbinden AM. Effect of racemic mixture and the (S+)-isomer of ketamine on temporal and spatial summation of pain. Br J Anaesth. 1996 Nov;77(5):625-31. doi: 10.1093/bja/77.5.625.
Adams HA, Werner C. [From the racemate to the eutomer: (S)-ketamine. Renaissance of a substance?]. Anaesthesist. 1997 Dec;46(12):1026-42. doi: 10.1007/s001010050503. German.
Pfenninger E, Baier C, Claus S, Hege G. [Psychometric changes as well as analgesic action and cardiovascular adverse effects of ketamine racemate versus s-(+)-ketamine in subanesthetic doses]. Anaesthesist. 1994 Nov;43 Suppl 2:S68-75. German.
Adams HA, Thiel A, Jung A, Fengler G, Hempelmann G. [Studies using S-(+)-ketamine on probands. Endocrine and circulatory reactions, recovery and dream experiences]. Anaesthesist. 1992 Oct;41(10):588-96. German.
Nielsen RV, Fomsgaard JS, Siegel H, Martusevicius R, Nikolajsen L, Dahl JB, Mathiesen O. Intraoperative ketamine reduces immediate postoperative opioid consumption after spinal fusion surgery in chronic pain patients with opioid dependency: a randomized, blinded trial. Pain. 2017 Mar;158(3):463-470. doi: 10.1097/j.pain.0000000000000782.
Nielsen RV, Fomsgaard JS, Nikolajsen L, Dahl JB, Mathiesen O. Intraoperative S-ketamine for the reduction of opioid consumption and pain one year after spine surgery: A randomized clinical trial of opioid-dependent patients. Eur J Pain. 2019 Mar;23(3):455-460. doi: 10.1002/ejp.1317. Epub 2018 Oct 14.
Brinck ECV, Maisniemi K, Kankare J, Tielinen L, Tarkkila P, Kontinen VK. Analgesic Effect of Intraoperative Intravenous S-Ketamine in Opioid-Naive Patients After Major Lumbar Fusion Surgery Is Temporary and Not Dose-Dependent: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Anesth Analg. 2021 Jan;132(1):69-79. doi: 10.1213/ANE.0000000000004729.
Other Identifiers
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2021-272
Identifier Type: -
Identifier Source: org_study_id
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