Metabolites of Tramadol in the Postoperative Surgical Patients
NCT ID: NCT04004481
Last Updated: 2021-07-09
Study Results
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View full resultsBasic Information
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COMPLETED
50 participants
OBSERVATIONAL
2019-01-25
2020-03-13
Brief Summary
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Detailed Description
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The patients will receive 500 mg of tramadol intravenously divided into 5 doses during the first 24 postoperative hours in the ICU. The plasma concentrations of tramadol, O-desmethyltramadol and N-desmethyltramadol will be measured 1, 2 and 4 hours after the first dose, and immediately before the 2nd, 3rd and 5th dose. There will therefore be 6 measurements of tramadol and its metabolites.
The analgesic effect of tramadol will be measured in awake patients with Numeric Rating Scale - NRS (0 - without pain, 10 - strong pain) 30 minutes before and 30 minutes after tramadol administration. The NRS value of 3 or less will be considered as adequate analgesia. In case of inadequate analgesia rescue analgesic (morphine) will be used according to the local protocol.
In unconscious patients the analgesic effect of tramadol will be tested by Critical Care Pain Observation Tool (CPOT). The CPOT value of less than 2 will be considered as adequate analgesia. In case of inadequate analgesia rescue analgesic (morphine) will be used according to the local protocol. During the first 24 hours side effect of tramadol, such as nausea, vomiting and new respiratory depression will be recorded.
Conditions
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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Adult patients undergoing major open abdominal surgery
Observational study. In the patients undergoing major open abdominal surgery for cancer tramadol will be used for postoperative analgesia. In the postoperative period parent compound and metabolites of tramadol will be measured. Postoperative analgesia and adverse effects will be registered and compared between CYP2D6 phenotypes observed.
Postoperative analgesia using tramadol
Tramadol 100 mg will be given to the patients in the postoperative period.
Interventions
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Postoperative analgesia using tramadol
Tramadol 100 mg will be given to the patients in the postoperative period.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* surgical interventions requiring a laparotomy and involving resection of the organs of the digestive system
* postoperative ICU admission.
Exclusion Criteria
* patients under 18 years old
* patient over 90 years old
* BMI \<18 and \>35
* laparoscopic surgery
* chronic therapy with tramadol, cimetidine, paroxetine, pimozide, metoclopramide, amiodarone, olanzapine, chlorpromazine, fluphenazine, haloperidol, thioridazine, risperidone and clozapine
18 Years
90 Years
ALL
No
Sponsors
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Josip Juraj Strossmayer University of Osijek
OTHER
Osijek University Hospital
OTHER
Responsible Party
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Principal Investigators
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Nenad Neskovic, MD
Role: PRINCIPAL_INVESTIGATOR
Osijek University Hospital
Locations
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University Hospital Osijek
Osijek, , Croatia
Countries
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References
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Yang Y, Botton MR, Scott ER, Scott SA. Sequencing the CYP2D6 gene: from variant allele discovery to clinical pharmacogenetic testing. Pharmacogenomics. 2017 May;18(7):673-685. doi: 10.2217/pgs-2017-0033. Epub 2017 May 4.
Qiao W, Yang Y, Sebra R, Mendiratta G, Gaedigk A, Desnick RJ, Scott SA. Long-Read Single Molecule Real-Time Full Gene Sequencing of Cytochrome P450-2D6. Hum Mutat. 2016 Mar;37(3):315-23. doi: 10.1002/humu.22936. Epub 2015 Dec 18.
Grond S, Sablotzki A. Clinical pharmacology of tramadol. Clin Pharmacokinet. 2004;43(13):879-923. doi: 10.2165/00003088-200443130-00004.
de Moraes NV, Lauretti GR, Coelho EB, Godoy AL, Neves DV, Lanchote VL. Impact of fraction unbound, CYP3A, and CYP2D6 in vivo activities, and other potential covariates to the clearance of tramadol enantiomers in patients with neuropathic pain. Fundam Clin Pharmacol. 2016 Apr;30(2):153-61. doi: 10.1111/fcp.12168. Epub 2015 Dec 11.
Xu J, Zhang XC, Lv XQ, Xu YY, Wang GX, Jiang B, Cai L, Cai XJ. Effect of the cytochrome P450 2D6*10 genotype on the pharmacokinetics of tramadol in post-operative patients. Pharmazie. 2014 Feb;69(2):138-41.
Stamer UM, Musshoff F, Kobilay M, Madea B, Hoeft A, Stuber F. Concentrations of tramadol and O-desmethyltramadol enantiomers in different CYP2D6 genotypes. Clin Pharmacol Ther. 2007 Jul;82(1):41-7. doi: 10.1038/sj.clpt.6100152. Epub 2007 Mar 14.
Candiotti KA, Birnbach DJ, Lubarsky DA, Nhuch F, Kamat A, Koch WH, Nikoloff M, Wu L, Andrews D. The impact of pharmacogenomics on postoperative nausea and vomiting: do CYP2D6 allele copy number and polymorphisms affect the success or failure of ondansetron prophylaxis? Anesthesiology. 2005 Mar;102(3):543-9. doi: 10.1097/00000542-200503000-00011.
Bosilkovska M, Walder B, Besson M, Daali Y, Desmeules J. Analgesics in patients with hepatic impairment: pharmacology and clinical implications. Drugs. 2012 Aug 20;72(12):1645-69. doi: 10.2165/11635500-000000000-00000.
Rijkenberg S, Stilma W, Bosman RJ, van der Meer NJ, van der Voort PHJ. Pain Measurement in Mechanically Ventilated Patients After Cardiac Surgery: Comparison of the Behavioral Pain Scale (BPS) and the Critical-Care Pain Observation Tool (CPOT). J Cardiothorac Vasc Anesth. 2017 Aug;31(4):1227-1234. doi: 10.1053/j.jvca.2017.03.013. Epub 2017 Mar 15.
Severgnini P, Pelosi P, Contino E, Serafinelli E, Novario R, Chiaranda M. Accuracy of Critical Care Pain Observation Tool and Behavioral Pain Scale to assess pain in critically ill conscious and unconscious patients: prospective, observational study. J Intensive Care. 2016 Nov 7;4:68. doi: 10.1186/s40560-016-0192-x. eCollection 2016.
Neskovic N, Mandic D, Marczi S, Skiljic S, Kristek G, Vinkovic H, Mraovic B, Debeljak Z, Kvolik S. Different Pharmacokinetics of Tramadol, O-Demethyltramadol and N-Demethyltramadol in Postoperative Surgical Patients From Those Observed in Medical Patients. Front Pharmacol. 2021 Apr 15;12:656748. doi: 10.3389/fphar.2021.656748. eCollection 2021.
Provided Documents
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Document Type: Study Protocol and Statistical Analysis Plan
Other Identifiers
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OsijekUH
Identifier Type: -
Identifier Source: org_study_id
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