A collection of reagents and other associated materials intended to be used for the qualitative and/or quantitative detection of multiple biochemical markers associated with traumatic brain injury in a clinical specimen, using a chemiluminescent immunoassay method. This test is used to detect glial fibrillary acidic protein (GFAP) and ubiquitin carboxyl-terminal hydrolase L1 (UCH-L1) as an aid to determine the need for a neuroimaging radiological scan following head injury.