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Influence of ketamine on the brain.


- candidate number9029
- NTR NumberNTR2717
- ISRCTNISRCTN wordt niet meer aangevraagd.
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR26-jan-2011
- Secondary IDsP10.136 MEC LUMC
- Public TitleInfluence of ketamine on the brain.
- Scientific TitleA randomised, double blind, placebo-controlled cross-over study to investigate the effects of intravenous S(+)-ketamine on resting state functional magnetic resonance imaging in healthy volunteers.
- ACRONYMF-ket study
- hypothesisIn this study we investigate the effect of ketamine on the brain. We hypothesize that ketamine influences brain areas involved in pain, cognitive function and psychosis.

The study aims are:
1. To investigate the effects of 2 plasma levels of S(+)-ketamine on fMRI activation patterns in healthy male volunteers;
2. To assess the feasibility of PK/PD-analyses for S(+)-ketamine-induced fMRI-activation patterns;
3. To investigate whether the subjective effects reported by volunteers can be linked to changes in fMRI activation patterns.
- Healt Condition(s) or Problem(s) studiedHealthy subjects, S(+)-ketamine
- Inclusion criteriaHealthy right handed male subjects naive to ketamine between 18 to 45 years old.
- Exclusion criteria1. Obesity (BMI > 30);
2. Significant history of any cardiac or vascular disorder, asthma or other pulmonary disease, major gastrointestinal abnormalities, peptic ulceration, hepatic, neurological, psychiatric, haematological (including bleeding disorders), endocrine, renal, or major genitourinary disease;
3. History of illness, condition or medication use that, in the opinion of the investigator, might interfere with optimal participation, confound the results of the study or pose additional risk in administering S(+)-ketamine to the subject;
4. History of chronic alcohol or illicit drug use;
5. Unable to refrain from quinine containing products and grapefruit or grapefruit juice from 7 days prior to study start until the last study day;
6. Metal medical devices like pacemakers, knee or hip prosthesis, ear implants, vessel clips, subcutaneous insulin pumps or carries metal particles (e.g. metal splinter in the eye) inside the body;
7. Claustrophobia;
8. Allergy to study medications;
9. Not able to maintain a regular diurnal rhythm.
- mec approval receivedyes
- multicenter trialno
- randomisedyes
- masking/blindingSingle
- controlPlacebo
- groupCrossover
- TypeSingle arm
- Studytypeintervention
- planned startdate 1-mrt-2011
- planned closingdate1-jan-2012
- Target number of participants12
- InterventionsEvery participant will have two study days: 1. Placebo administration;
2. Ketamine administration; ketamine will be given during 2 hours in two different concentrations. 20mg/70kg/h will be given the first hour and 40mg/70kg/h the second hour.
- Primary outcome1. Functional MRI;
2. Pain scores;
3. Ketamine blood concentration.
- Secondary outcome1. Nausea and vomiting;
2. Psychomimetic side effects;
3. Saliva cortisol measurements.
- Timepoints1. Functional MRI: Before, 1 and 2 hours after the start of the infusion and 20 and 120 minutes after the termination of the infusion;
2. Pain scores: Before infusion and every 20 minutes after the start of the infusion till the end of the study (approximately 4 hours);
3. Ketamine blood concentration: Blood samples will be taken at the same time points as the pain scores;
4. Nausea and vomiting: The presence of nausea will be determined at the same time points as the pain scores. Vomiting will be monitored during the whole study period;
5. Psychomimetic side effects: Side effects will be scored using a VAS scale at the same time points as the pain scores;
6. Saliva cortisol measurements: Saliva will be collected at the same time points as the pain scores.
- Trial web siteN/A
- statusopen: patient inclusion
- CONTACT FOR PUBLIC QUERIESProf. Dr. Albert Dahan
- CONTACT for SCIENTIFIC QUERIESProf. Dr. Albert Dahan
- Sponsor/Initiator Leiden University Medical Center (LUMC)
- Funding
(Source(s) of Monetary or Material Support)
European Union
- PublicationsN/A
- Brief summaryThis study is conducted to evaluate the effect of ketamine on the brain and to link this to the pharmacokinetics and pharmacodynamics of the drug. A single blind placebo controlled trial will be performed and before, during and after the start of the infusion several functional MRI scans will be made. Furthermore, pain tests will be performed, blood samples will be taken and the presence of side effects will be evaluated during the whole study period.
- Main changes (audit trail)
- RECORD26-jan-2011 - 4-mrt-2011


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