Prehospital Predictors of Emergent Intervention following Helicopter Transfer for Spontaneous Intraparenchymal Hemorrhage.

OBJECTIVE: Helicopter transport may shorten transportation times for emergent neurosurgical intervention. The usefulness of helicopter transport after spontaneous intraparenchymal hemorrhage is not well studied. This study seeks to clarify factors that are associated with urgent surgical intervention in patients with spontaneous intracerebral hemorrhage following helicopter transport. METHODS: Records were reviewed for patients with spontaneous intraparenchymal hemorrhage transported by helicopter to Dartmouth-Hitchcock Medical Center between January 2008 and December 2011. Records were evaluated for factors associated with emergent tertiary-level care intervention during the first 24 hours of admission. RESULTS: A total of 107 patients met inclusion criteria, with a mean age of 67.2 years. At presentation, 79 (75.24%) were hypertensive, 22 (21.57%) had an increased international normalized ratio, and 47 (45.19%) were intubated. Thirty-three patients (30.8%) underwent 1 or more neurosurgical interventions within 24 hours of arrival, with an additional 6 (5.6%) patients undergoing neurosurgical intervention after 24 hours after admission. On univariate analysis, age, Glasgow Coma Scale (GCS) score, and clot volume were significant predictors of neurosurgical intervention within 24 hours of interfacility helicopter transport. A lobar clot, presence of intraventricular hemorrhage, and presence of >1 cm of midline shift were also associated with neurosurgical intervention within 24 hours. On multivariate analysis, younger age, GCS score of 3-8, and lobar hemorrhage were independent predictors of neurosurgical intervention within 24 hours. CONCLUSIONS: Two thirds of patients did not undergo any surgical intervention during the first 24 hours of admission after interfacility helicopter transfer. Factors associated with urgent neurosurgical intervention included younger age, low GCS score, and presence of lobar hemorrhage.