Inclusion Criteria:  Age ≥ 18 years of age Intraventricular hemorrhage documented on head CT or MRI scan, no older than 24 hrs. Intraventricular hemorrhage Graeb Score ≥3 points Urgent need of cerebrospinal fluid drainage (<24 hours) Deterioration of consciousness or medical sedation at the time of enrollment causing the patient to be mentally and/or physically incapacitated and legally incompetent in the decision of inclusion ("acute study" conduct). Indication for active treatment evaluated by the treating physicians Use of validated anti-conception in fertile female participants in concordance with guidelines provided by the Danish Health and Medicines Authority or a negative urine human chorion gonadotropin (HCG) test.  Exclusion Criteria:  Patient has fixed and dilated pupils Pregnant or nursing women (fertile female participants will be required to take a validated pregnancy test for evaluation of pregnancy)