Racemic Ketamine Versus S-ketamine With Arterial Spin Labeling (ASL)-MRI in Healthy Volunteers
Status:
Completed
Trial end date:
2012-02-01
Target enrollment:
Participant gender:
Summary
Racemic ketamine and S-ketamine are used in clinical practice today. Little is known of their
difference in effect on cerebral blood flow, volume and metabolism. cerebral blood flow (CBF)
measuring techniques are limited in time so constant measurement to mirror a dynamic process
is impossible or very difficult. A novel MRI application, arterial spin labeling, offers the
possibility that without radiation or contrast, to measure semi-continuous CBF with
measurements every 60-120 seconds. The investigators will give 14 healthy volunteers both
study drugs in a randomised sequence with one week apart and measure regional CBF during the
study period of 45 minutes after a sub-anaesthetic bolus dose of 0,6 mg/kg racemic ketamine
and 0,3 mg/kg S-ketamine The investigators hypothesize that there is no difference between
racemic ketamine and S(+)-ketamine with regards to Arterial Spin Labeling (ASL) measured
cerebral blood flow.