• Sander Bus, Dagmar Verbaan, Bertjan J Kerklaan, Sprengers Marieke E S MES c Department of Radiology , Academic Medical Centre , Amsterdam , The Netherlands., William P Vandertop, Jan Stam, Gerrit J Bouma, and Pepijn van den Munckhof.
• a Neurosurgical Centre Amsterdam , Academic Medical Centre , Amsterdam , The Netherlands.
• Br J Neurosurg. 2019 Feb 1; 33 (1): 51-57.

PurposeAccording to the international guidelines, acute subdural hematomas (aSDH) with a thickness of >10 mm, or causing a midline shift of >5 mm, should be surgically evacuated. However, high mortality rates in older patients resulted in ongoing controversy whether elderly patients benefit from surgery. We identified predictors of outcome in a single-centre cohort of elderly patients undergoing surgical evacuation of aSDH or subacute subdural hematoma (saSDH).Materials And MethodsThis retrospective study included all patients aged ≥65 years undergoing surgical evacuation of aSDH/saSDH from 2000 to 2015. One-year outcome was dichotomized into favourable (Glasgow Outcome Scale (GOS) 4-5) and unfavourable (GOS 1-3). Predictors of outcome were identified by analysing patient characteristics.ResultsEighty-four patients aged ≥65 years underwent craniotomy for aSDH/saSDH during the 16 year time period. Twenty-five percent regained functional independence, 11% survived severely disabled, and 64% died. Most patients died of respiratory failure following withdrawal of artificial respiration or following restriction of treatment. Age of the SDH or Glasgow Coma Scores ≤8/intubation did not predict unfavourable outcome. All patients with bilaterally absent pupillary light reflexes died, also those who still exhibited one normal-sized pupil.ConclusionThe low number of operated patients per year probably suggests that this cohort represents a selection of patients who were judged to have good chances of favouring from surgery. Functional independence at one-year follow-up was reached in 25% of patients, 64% died. Patients with bilaterally absent pupillary light reflexes did not benefit from surgery. The tendency to restrict treatment because of presumed poor prognosis may have acted as a self-fulfilling prophecy.

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