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Association Between Clinical Effect of Continuous Morphine Administration After Surgery and Pharmacogenetics

1. marts 2017 opdateret af: Massimo Allegri, IRCCS Policlinico S. Matteo

Association Between Clinical Effect of Continuous Morphine Administration in Patients After Major Surgery and Pharmacogenetics: Perspective Observational Clinical Study

Identification of the genetic polymorphisms that could be correlated either with a better clinical response or with a major predisposition of patients to develop tolerance and/or side effects to the treatment with morphine.

Studieoversigt

Status

Trukket tilbage

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Valuation of the rescue doses necessary to maintain NRS<4 in the first 24 hours post-surgery in the two groups of patients, A e B. Group A: homozygous patients for the more frequent allele of the polymorphism A118G of OPRM1 gene (about 80%); group B: both homozygous and heterozygous patients for the less frequent allele (about 20%).

Undersøgelsestype

Observationel

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Italien
      • Pavia, Italien, 27100
        • Fondazione IRCCS Policlinico San Matteo

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 75 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

Pazients scheduled for major abdominal or urological surgery with postoperative pain control with continuous morphine administration

Beskrivelse

Inclusion criteria:

  • Males and females over 18 years, under 75 years, scheduled for postoperative pain control with continuous morphine administration
  • HIV negative
  • Classification American Society of Anesthesiologists (ASA) I: without systemic disease
  • Classification ASA II or III (mild systemic disease or severe systemic disease that limits the activity without invalidity).
  • Undergoing abdominal and urologic major surgery (neither urgent nor emergency surgery)
  • Signed informed consent

Exclusion criteria:

  • Usual assumption of analgesic opioids
  • Cognitive alterations nor mental retardation
  • Severe hepatic/renal insufficiency (cholinesterase <3000 mU/ml, total bilirubinaemia <2 mg/dl and creatininaemia <1.2 mg/dl)
  • Inpatients in intensive therapy, either with sedation and/or mechanic ventilation.
  • Allergies to morphine and derivates

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Group A
Homozygous patients for the more frequent allele of the polymorphism A118G of OPRM1 gene
Medicin: morphine chlorhydrate

The drug will be administrated by a bolus 45 minutes before the end of the surgery, with the following modalities: bolus with morphine chlorhydrate 0.15 mg/kg ± 20%. Also acetaminophene 1g and ketoprofen 160 mg (ketorolac 30mg) will be administrated during the operation.

At the exit of the operative compartment patients will have an continuous infusion for 48h with morphine chlorhydrate 0,02 mg/kg/h.

Moreover, a rescue dose therapy will be prescribed with ketoprofen 160 mg or ketorolac 30mg (in case of allergy acetaminophene 1g) if NRS<4 maximum x 3 daily.

Postoperative analgesic treatment is lasting 48h for each patient (between starting of the infusion (T0) and the following 48h).

Andre navne:
  • morfina cloridrato
Group B
Both homozygous and heterozygous patients for the less frequent allele of the polymorphism A118G of OPRM1 gene
Medicin: morphine chlorhydrate

The drug will be administrated by a bolus 45 minutes before the end of the surgery, with the following modalities: bolus with morphine chlorhydrate 0.15 mg/kg ± 20%. Also acetaminophene 1g and ketoprofen 160 mg (ketorolac 30mg) will be administrated during the operation.

At the exit of the operative compartment patients will have an continuous infusion for 48h with morphine chlorhydrate 0,02 mg/kg/h.

Moreover, a rescue dose therapy will be prescribed with ketoprofen 160 mg or ketorolac 30mg (in case of allergy acetaminophene 1g) if NRS<4 maximum x 3 daily.

Postoperative analgesic treatment is lasting 48h for each patient (between starting of the infusion (T0) and the following 48h).

Andre navne:
  • morfina cloridrato

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Assessment of the rescue doses in the two groups homozygous patients for the more frequent allele of the polymorphism A118G of OPRM1 gene; group B: both homozygous and heterozygous patients for the less frequent allele
Tidsramme: first 24 h after surgery
Valuation of the rescue doses necessary to maintain NRS<4 in the first 24 hours post-surgery in the two groups of patients, A e B. Group A: homozygous patients for the more frequent allele of the polymorphism A118G of OPRM1 gene (about 80%); group B: both homozygous and heterozygous patients for the less frequent allele (about 20%).
first 24 h after surgery

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Varianter ved loci OPRM1, COMT, UGT'er, ESR1, mod median smertemåling
Tidsramme: i løbet af 24 timer efter operationen
Frekvensen af ​​varianterne ved loci OPRM1, COMT, UGT'er, ESR1, både hos patienter med NRS ≤4 og hos dem, der har NRS >4 mindst én gang i løbet af 24 timer.
i løbet af 24 timer efter operationen
Variants at the loci OPRM1, COMT, UGTs, ESR1,towards median pain measure
Tidsramme: period between 24 - 48 h postsurgery
Frequency of the variants at the loci OPRM1, COMT, UGTs, ESR1, both in patients with NRS ≤4 and in those having NRS >4 at least once during the period between 24-48 hours postsurgery.
period between 24 - 48 h postsurgery
Pharmacokinetics of morphine during continuous administration after surgery
Tidsramme: 48 h after surgery
Pharmacokinetic study of both morphine and its principal active and/or toxic metabolites (M3G and M6G).
48 h after surgery
Detection of the possible side effects.
Tidsramme: 72 h postopratively
Detection of the possible side effects after continuous morphine administration
72 h postopratively
Detection of the association between M3G/M6G ratio and polymorphisms of UGTs
Tidsramme: within 72 h postoperatively
Detection of the association between M3G/M6G ratio and polymorphisms of UGTs and its possible side effects.
within 72 h postoperatively

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

IRCCS Policlinico S. Matteo

Efterforskere

  • Ledende efterforsker: Massimo Allegri, MD, IRCCS Policlinico San Matteo

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. november 2010

Primær færdiggørelse (Forventet)

1. november 2013

Studieafslutning (Forventet)

1. november 2013

Datoer for studieregistrering

Først indsendt

2. november 2010

Først indsendt, der opfyldte QC-kriterier

2. november 2010

Først opslået (Skøn)

3. november 2010

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

3. marts 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

1. marts 2017

Sidst verificeret

1. marts 2017

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • PT-SM-08-MorfinaContinua-Gene

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Kliniske forsøg med Kirurgi

Kliniske forsøg med morphine chlorhydrate

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Betingelser

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Sponsor / samarbejdspartnere

Placeringer

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