Clinical trial NCT01795495: Methadone vs Magnesium in Spinal Fusion
Official title: Analgesia Following Posterior Spinal Fusion: Methadone vs Magnesium
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
Conditions: Idiopathic Scoliosis
Keywords: Spinal Fusion
Scoliosis
Methadone
Magnesium
Adolescents
Back Surgery
Lead sponsor: Nationwide Children's Hospital
Sponsor class: OTHER
First posted: 2013-02-20
Enrollment: 63
Sex: ALL
Minimum age (years): 12
Maximum age (years): 19
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: SUPPORTIVE_CARE

Brief summary: Significant pain may occur following posterior spinal fusion despite the use of conventionally accepted techniques including patient controlled analgesia. If detected, a significant reduction in opioid requirements may lead to improved patient satisfaction and decreased opiate side effects.

The current study would use a prospective, randomized trial investigating the efficacy of one of 2 regimens as adjuncts to intraoperative anesthesia and postoperative analgesia, along with a third control group. The patients would be randomized to receive remifentanil plus a single intraoperative dose of methadone; remifentanil plus a bolus followed by an infusion of magnesium; or remifentanil alone. In addition, the two medications being studied might make it easier to determine the efficacy of neurophysiologic monitoring including somatosensory evoked potential (SSEP) (amplitude and latency) and motor evoked potential (MEP) (mA) required to elicit the response.

The purpose of this study would be to explore the effects of intraoperative methadone vs magnesium on intraoperative anesthetic requirements, postoperative opioid requirements, the efficacy of neurophysiologic monitoring including SSEP and MEP, inspired concentration of desflurane, remifentanil, and the need for intraoperative supplemental agents to control blood pressure.


Eligibility criteria: Inclusion Criteria:

* Patients older than 12, and younger than 19 years of age undergoing posterior spinal fusion for idiopathic scoliosis
* American Society of Anesthesiologist (ASA) physical status I or II
* Parents/Guardian willing and able to authorize informed consent
* Patients willing and able to authorize assent

Exclusion Criteria:

* Patients presenting with neuromuscular scoliosis
* Patients deemed at increased risk of adverse reactions due to the presence of pre-existing severe organ system dysfunction, including debilitating lung disease, severe obstructive sleep apnea, severe congenital or acquired heart disease, and/or severe renal impairment
* Patients who are both being currently treated for a psychological disorder and have a history of hospitalization for said disorder

Primary outcomes:
measure: Intra- and Post-operative Pain Relief
timeFrame: Intra-operative and 24 hours post-operatively
Secondary outcomes:
measure: Post-operative Pain Scores
timeFrame: Post-operatively to 24 hours
Other outcomes:
Locations:
city: Columbus
country: United States
facility: Nationwide Children's Hospital
state: Ohio
Study officials:
affiliation: Nationwide Children's Hospital
name: David P. Martin, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Stemland CJ, Witte J, Colquhoun DA, Durieux ME, Langman LJ, Balireddy R, Thammishetti S, Abel MF, Anderson BJ. The pharmacokinetics of methadone in adolescents undergoing posterior spinal fusion. Paediatr Anaesth. 2013 Jan;23(1):51-7. doi: 10.1111/pan.12021. Epub 2012 Sep 14.
citation: Sharma A, Tallchief D, Blood J, Kim T, London A, Kharasch ED. Perioperative pharmacokinetics of methadone in adolescents. Anesthesiology. 2011 Dec;115(6):1153-61. doi: 10.1097/ALN.0b013e318238fec5.
citation: Gottschalk A, Durieux ME, Nemergut EC. Intraoperative methadone improves postoperative pain control in patients undergoing complex spine surgery. Anesth Analg. 2011 Jan;112(1):218-23. doi: 10.1213/ANE.0b013e3181d8a095. Epub 2010 Apr 24.
citation: Elsharnouby NM, Elsharnouby MM. Magnesium sulphate as a technique of hypotensive anaesthesia. Br J Anaesth. 2006 Jun;96(6):727-31. doi: 10.1093/bja/ael085. Epub 2006 May 2.
citation: Levaux Ch, Bonhomme V, Dewandre PY, Brichant JF, Hans P. Effect of intra-operative magnesium sulphate on pain relief and patient comfort after major lumbar orthopaedic surgery. Anaesthesia. 2003 Feb;58(2):131-5. doi: 10.1046/j.1365-2044.2003.02999.x.
citation: Martin DP, Samora WP 3rd, Beebe AC, Klamar J, Gill L, Bhalla T, Veneziano G, Thung A, Tumin D, Barry N, Rice J, Tobias JD. Analgesic effects of methadone and magnesium following posterior spinal fusion for idiopathic scoliosis in adolescents: a randomized controlled trial. J Anesth. 2018 Oct;32(5):702-708. doi: 10.1007/s00540-018-2541-5. Epub 2018 Aug 4.