CT findings in subarachnoidal haemorrhage (SAH). A retrospective study of 138 patients.

In a retrospective study the CT scans of 138 patients with the clinical diagnosis of SAH were reviewed. CT was highly sensitive in detecting blood in the CSF spaces during the 3 days following SAH, with decreasing accuracy correlated to the time interval between SAH and CT examination. Clinical state on admission and CT findings were closely related, as were the localisation of detectable blood and the site of source of bleeding. Whereas blood clots in the basal cisterns, above the convexities, and intracerebrally, as well as the finding of a brain oedema, were significantly correlated to the time of survival, hydrocephalus and ventricular haemorrhage had no bearing on the survival time.