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Effets affectifs des opioïdes préopératoires : un essai randomisé, à double insu et contrôlé par placebo (AFFECT2)

21 septembre 2026 mis à jour par: Harald Lenz, Oslo University Hospital

Comprendre l'utilisation d'opioïdes avant et après la chirurgie en Norvège : une étude multicentrique prospective et une étude contrôlée randomisée en double aveugle

  1. To investigate and compare the affective short-term effects of opioid drugs: morphine, oxycodone and fentanyl, administered to the patients before the induction of general anesthesia.
  2. Charting opioid use after surgery in patients treated at hospitals in Norway
  3. Identify predictors for postoperative opioid use and persistent pain

Aperçu de l'étude

Description détaillée

The aim of the present study is to assess and compare, with a randomized, double-blind placebo-controlled trial, the affective effects of three commonly used opioid analgesics (Morphine, oxycodone and fentanyl) administered in three different doses before surgery in a clinical setting associated with physiological and psychological stress.

As a starting point, we have conducted an observational quality control study on peri-operative opioid pain management in day surgery patients.

Quality control study - a pilot study In this observational quality control study, we measured acute effects of the opioid agonist Remifentanil (effect site concentration 5ng/ml, Minto model) in day surgery patients on the operating table at Kongsberg hospital. Patients rated their levels of "feeling good" and "anxious" on a 0-10 numerical rating scale (NRS) immediately before and 1 minute after receiving remifentanil infusion. They also rated drug-specific effects such as "feeling high", "liking the drug effects" and their "level of drug-related discomfort". Moreover, we collected data on postoperative opioid use and pain during recovery through a telephone interview on the day following the surgery. The study was conducted with the usual standard hospital treatment and as such, did not interfere with the patients' medical procedures. All the procedures were approved by the data protection officer at Kongsberg Hospital, and all included patients signed informed consent on the day of surgery.

In the weeks prior to surgery participants received a questionnaire to assess their pain levels, nervousness and demographics as part of the hospital's standard procedure. On the day of surgery, approximately 30 min before surgery (T2) patients were asked to fill in questionnaires to assess mood, pain and prior opioid use. One minute before and one minute after opioid ( administration (T3), the patient was asked to rate mood, anxiety, drug liking and drug related discomfort. On the day following surgery patients were contacted by phone to assess their mood, pain and pain interference, as well as their pain relief strategies in the last 24h (e.g. use of provided analgesics).

160 patients were included in the pilot quality control study. The results of the pilot study show that patients report a clear feeling of 'drug high' after remifentanil infusion. Surprisingly, however, the opioid analgesic induced only a weak reduction of anxiety, and the majority of patients reported feeling worse or equally good, but not better, after the infusion. In the postoperative phone interview, many patients tell us they have not used any of the opioid drugs prescribed for at-home pain relief during the first 24 hours are recovering at home. Stated reasons include a fear of addiction, as well as a wish to keep the analgesics in case of breakthrough/peak pain at a later stage. These preliminary results do not support the opioid pre-induction procedure as an effective manner to produce pre-surgery stress relief. It might be possible that the subjective perception of stress relief does not match the physiological relief reaction to stress.

On the basis of these intriguing, preliminary findings, we will now conduct a more comprehensive randomized double-blind controlled study comparing different classes of pre-surgical opioid analgesics on the subjective and physiological affective reactions in an acute stress clinical situation in Norway.

Possible participants of the AFFECT2 RCT (randomized controlled trial) will also be asked if they wish to join a parallel longitudinal study conducted in collaboration with the University of Oslo (UiO) in which we will collect and analyse data on relevant pre-surgery risk factors for problematic opioid use, and to quantify opioid-induced analgesia before and after surgery using prescription registry data.

Type d'étude

Interventionnel

Inscription (Réel)

1014

Phase

  • Phase 4

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

    • Oslo
      • Oslo, Oslo, Norvège
        • Harald Lenz

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans et plus (Adulte, Adulte plus âgé)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

- Health status ASA1 (American Society of Anesthesiologists physical status) or ASA2 as categorised by a medical doctor at the hospital based on medical history, physical examination, laboratory test etc. unrelated to the current study.

ASA1 and ASA2 (ASA1 is defined as "Healthy, non-smoking, no or minimal alcohol use" and ASA2 is defined as "Mild diseases only without substantive functional limitations). Being eligible for day surgery means participants are overtly healthy as determined by clinical staff.

  • The participant is considered as eligible for the use of fentanyl, morphine and oxycodone by a medical doctor at the hospital, based on an overall assessment of the psychiatric and somatic condition, used medical drugs, regarding possible interactions and contraindications for the use of the study medicaments.
  • Body weight and body mass index (BMI) within the range 18-35 kg/m2 (inclusive).
  • Capable of giving signed informed consent as which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
  • Having good verbal communication skills in Norwegian.
  • Patients undergoing planned day surgery with general anesthesia (outpatient sample).
  • Orthopedic, rectal, gynecological, hand and foot surgery, and minor vascular procedures.
  • Inpatients undergoing planned gynecological and orthopedic surgery.
  • Hysterectomy, laparoscopic ovariectomy, lumbal herniotomy and other related procedures.
  • Minor gastrointestinal surgery

Exclusion Criteria:

  1. Known allergic reactions to morphine, oxycodone,or fentanyl. Known allergic reactions to any of the incredients described in the SPC, pt 6.1.
  2. Severe chronic obstructive lung disease,
  3. Cor pulmonale,
  4. Severe bronchial asthma,
  5. Severe respiratory failure with hypoxemia and hypercapnia
  6. Moderate to severe hepatic impairment,
  7. Moderate to severe kidney failure
  8. Acute abdomen
  9. Increased brain pressure
  10. Head trauma
  11. Use of MAO blockers in the last two weeks
  12. Hypovolemia
  13. Hypotension
  14. Myasthenia gravis
  15. Any other health status not corresponding to ASA1 or ASA2. This includes patients with severe disease burden, major psychiatric disorders that could interfere with the procedures and communication.
  16. Pregnancy. Women of childbearing potential defined as all premenopausal female (a postmenopausal state is defined as no menses for 12 months without an alternative medical cause) will be asked if they are pregnant.
  17. Breastfeeding women.
  18. Illegal drugs use like opioids, cocaine and amphetamine

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Autre
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Double

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Comparateur placebo: Placebo

The patient is given standardized questions about their well-being and affective state before and after the administration of placebo (0.9% NaCl intravenously). This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of placebo intravenously. This is carried out on the operating table right before anesthesia

Autres noms:
  • 0,9% NaCl , Natriumklorid 9 mg/ml, Hameln (code ATC : B05B B01)
Comparateur actif: Morphine 2.5 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of morphine 2.5 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of 2.5 mg morphine intravenously. This is carried out on the operating table right before anesthesia

Autres noms:
  • Morphine, Orion (code ATC : N02A A01)
Comparateur actif: Morphine 5 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of morphine 5 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of morphine 5 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Morphine, Orion (code ATC : N02A A01)
Comparateur actif: Morphine 10 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of morphine 10 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of morphine 10 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Morphine, Orion (code ATC : N02A A01)
Comparateur actif: Oxycodone 2.5 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of oxycodone 2.5 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of oxycodone 2.5 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Oxycodone, Hamelin (code ATC : N02A A05)
Comparateur actif: Oxycodone 5 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of oxycodone 5 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of oxycodone 5 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Oxycodone, Hamelin (code ATC : N02A A05)
Comparateur actif: Oxycodone 10 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of oxycodone 10 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of oxycodone 10 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Oxycodone, Hamelin (code ATC : N02A A05)
Comparateur actif: Fentanyl 0.025 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of fentanyl 0.025 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of fentanyl 0.025 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Fentanyl, Hamelin (code ATC : N01A H01)
Comparateur actif: Fentanyl 0.05 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of fentanyl 0.05 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of fentanyl 0.05 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Fentanyl, Hamelin (code ATC : N01A H01)
Comparateur actif: Fentanyl 0.1 mg

The patient is given standardized questions about their well-being and affective state before and after the administration of fentanyl 0.1 mg intravenously. This is carried out on the operating table right before anesthesia

The patient is given standardized questions about their well-being and affective state before and after the administration of fentanyl 0.1 mg intravenously . This is carried out on the operating table right before anesthesia

Autres noms:
  • Fentanyl, Hamelin (code ATC : N01A H01)

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Anxious
Délai: 8-10 minutes

Asking the patient of feeling anxious; Numeric rating scale 0 -10 prior opioid and post opioid intravenously (or placebo). 0=not anxious and 10=feeling extremely anxious

8-10 minutes
Relaxed
Délai: 8-10 minutes

Asking the patient of feeling relaxed. Numeric rating scale 0 -10 prior opioid and post opioid intravenously (or placebo). 0=not relaxed and 10=very relaxed.

8-10 minutes
Pain level
Délai: 8-10 minutes

Asking the patient of pain level. Numeric rating scale 0 -10 prior opioid and post opioid intravenously (or placebo). 0=no pain and 10= worst pain imaginable

8-10 minutes
Good
Délai: 8-10 minutes

Asking the patient of feeling good. Numeric rating scale 0 -10 prior opioid and post opioid intravenously (or placebo). 0=feeling no good and 10= feeling very good.

8-10 minutes
Dizzy
Délai: 2-4 minutes

Asking the patient of feeling dizzy. Numeric rating scale 0-10 post opioid intravenously (or placebo). 0=feeling not dizzy and 10=feeling very dizzy.

2-4 minutes
Sedated
Délai: 2-4 minutes

Asking the patient of feeling sedated. Numeric rating scale 0-10 post opioid intravenously (or placebo). 0=feeling not sedated and 10=feeling very sedated.

2-4 minutes
Feeling high, Numeric rating scale 0 -10
Délai: 2-4 minutes

Asking the patient of feeling high. Numeric rating scale 0-10 post opioid intravenously (or placebo). 0=feeling not high and 10=feeling very high.

2-4 minutes
Euphoric
Délai: 2-4 minutes

Asking the patient of feeling high. Numeric rating scale 0-10 post opioid intravenously (or placebo). 0=feeling not euphoric and 10=feeling very euphoric.

2-4 minutes
Drug liking
Délai: 2-4 minutes

Asking the patient of drug liking. Numeric rating scale 0-10 post opioid intravenously (or placebo). 0=feeling not drug liking and 10=feeling very drug liking.

2-4 minutes
Drug disliking
Délai: 2-4 minutes

Asking the patient of drug disliking. Numeric rating scale 0-10 post opioid intravenously (or placebo). 0=feeling not drug disliking and 10=feeling very drug disliking.

2-4 minutes

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Onset time
Délai: Subjective onset time of the three opioids during the 2 minutes observation time before anaesthesia induction

Determine onset time of subjective drug effect of the three opioids (each at three different doses) and proportion of participants that report feeling a drug effect within 0-2 minutes

Subjective onset time of the three opioids during the 2 minutes observation time before anaesthesia induction

Autres mesures de résultats

Mesure des résultats
Description de la mesure
Délai
Heart rate
Délai: 10 min

beats/min prior opioid and post opioid intravenously

10 min
Heart rate variability
Délai: 10 min

Heart rate variability (HRV) prior opioid and post opioid intravenously

10 min

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Les enquêteurs

  • Chercheur principal: Gernot Ernst, MD,PhD, Kongsberg Hospital, Vestre Viken Health Trust Norway

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

13 décembre 2022

Achèvement primaire (Réel)

27 mai 2025

Achèvement de l'étude (Réel)

27 juin 2025

Dates d'inscription aux études

Première soumission

17 novembre 2022

Première soumission répondant aux critères de contrôle qualité

28 novembre 2022

Première publication (Réel)

6 décembre 2022

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

24 septembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

21 septembre 2026

Dernière vérification

1 septembre 2026

Plus d'information

Termes liés à cette étude

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

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