The epiphenomena that seem to cause deterioration and death after spontaneous interacerebral hematoma (SICH) might best be studied in an animal model. Therefore, the principles for developing such a model and techniques to study these phenomena were evaluated. Animals will tolerate injection of 3%-5% of their brain volume with a high proportion of clots. Fluorescein can be used to study the blood-brain barrier, and gravimetry to study edema. Others have found that injection of a paraffin/oil mixture can be employed for a control model. Refinement of the fluorescein technique, development of a primate model, and directions for future research are suggested.