| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| chronic thoracic pain after cardiac surgery via sternotomy | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
| chronic thoracic pain (pain on chest) after cardiac surgery  | 
 
 
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| E.1.1.2 | Therapeutic area  | Analytical, Diagnostic and Therapeutic Techniques and Equipment [E] - Anesthesia and Analgesia [E03] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| The primary objective of this study is to determine the influence of intra-operative use of remifentanil versus fentanyl on the percentage of patients with chronic pain one year after cardiac surgery. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
-percentage of patients with chronic thoracic pain and their mean NRS scores three months and six months after cardiac surgery. - effect on the quality of life (QoL) and on the use of analgesics three months, six months and one year after surgery  - pain thresholds will be measured, evaluating the difference in postoperative pain threshold (three days and one year after surgery) compared to preoperative pain threshold (baseline), using quantitative sensory testing.   - other aspects in the postoperative period, e.g. NRS scores, postoperative consumption of analgesics, length of ICU- and hospital stay, safety parameters of remifentanil - influence of genetic variances involved in pain sensitivity (e.g. GCH-1, WDF-4, ZNF, MC1R) and in pharmacokinetics and pharmacodynamics of opiates (e.g. UGT, MRP, OPRM1, COMT) will be investigated.  - cost-effectiveness analysis alongside the RCT with a 12 month follow-up will be performed. 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
| All patients living in Utrecht and surroundings undergoing cardiac surgery via sternotomy, including a CABG and/or valve replacement, admitted to the ICU or PACU in the St. Antonius hospital, between 18 and 85 years old, weighing between 45 and 140 kg, written informed consent.   | 
 
 
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| E.4 | Principal exclusion criteria | 
- Pregnancy/ breastfeeding - Language barrier - History of drug abuse  - Neurologic condition such as peripheral neuropathy - Known morphine or paracetamol allergy - BMI > 35 kg/m2 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The percentage of patients reporting chronic thoracic pain one year after cardiac surgery.  | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| one year after cardiac surgery  | 
 
 
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| E.5.2 | Secondary end point(s) | 
- The percentage of patients reporting chronic thoracic pain three months and six months after cardiac surgery - The mean NRS score of patients with chronic thoracic pain three months and six months after cardiac surgery.  - The quality of life (QoL) three months, six months and one year after surgery. - The difference in postoperative pain thresholds three days and one year after cardiac surgery compared to the preoperative pain threshold (baseline)  - The use of analgesics three months, six months and one year after cardiac surgery. - The percentage of patients with at least one NRS-score of ≥ 4 at rest during ICU and hospital stay - The mean NRS per patient at rest during ICU stay  - The required amounts of analgesics (morphine/paracetamol) during hospital stay - Length of ICU and hospital stay - Total administered amount of remifentanil and fentanyl - Total medical costs during one year, including costs of hospitalization days (ICU and non-ICU) and costs of medications - Productivity costs during one year (i.e., foregone paid and unpaid work and reduced productivity while at work) - Cost-effectiveness, expressed as incremental costs per case of chronic pain at 12 months after cardiac surgery avoided and incremental costs per quality-adjusted life-year (QALY) gained - Safety parameters of remifentanil; such as nausea, constipation, respiratory depression, duration of ventilation, hallucinations, delirium, Glascow Coma Scale, renal function)  - Genetic variances involved in pain sensitivity (e.g. GCH-1, WDF-4, ZNF, MC1R) and pharmacokinetics and pharmacodynamics of opiates (e.g. UGT, MRP, OPRM1, COMT) 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| peri- and postoperative period, 3 months, 6 months and 1 year after cardiac surgery  | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  No  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  Yes  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  Yes  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  Yes  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  Yes  | 
| E.8.1.4 | Double blind  |  No  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  Yes  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  No  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
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| End of the trial is approximately one year after the last patient's visit for cardiac surgery.  | 
 
 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 6 | 
| E.8.9.1 | In the Member State concerned days | 0 |