title: Comparison of the ABC/2 estimation technique to computer-assisted volumetric analysis of intraparenchymal and subdural hematomas complicating the GUSTO-1 trial.
abstract: OBJECTIVE
  The volume of an intracerebral hemorrhage has been shown to be an important independent predictor of mortality in several reports. A technique for estimating hematoma volume, known as the ABC/2 method, has been proven a reliable, simple bedside technique for the volume measurement of intraparenchymal intracerebral hemorrhage. Subdural hematomas also carry a significant mortality risk but are more amenable to surgical evacuation. A reliable, simple bedside measurement of subdural hematoma volume may prove a valuable tool in prognostication and management of patients with this entity.
  
  
  METHODS
  Computed tomographic (CT) brain scans of 244 patients suffering from intracranial hemorrhage in the GUSTO-1 trial were systematically reviewed. The volumes of 298 intraparenchymal hematomas were measured by the ABC/2 technique, and the volumes of 44 subdural hematomas were measured by an adaptation of this technique and compared to computer-assisted volumetric analysis.
  
  
  RESULTS
  Excellent correlation between the techniques were achieved for both subdural (r=0.842; slope, 0.982) and intraparenchymal hematoma volume measurements (r=0.929; slope, 1.11).
  
  
  CONCLUSIONS
  The ABC/2 method is a simple and accurate technique for the measurement of intraparenchymal hematoma volume, and a simple adaptation allows for a similarly accurate measurement of subdural hematoma volume as well.
authors.affiliation: Cleveland Clinic Foundation, Ohio 44195, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Gebel
authors.forename: C A
authors.initials: CA
authors.lastname: Sila
authors.forename: M A
authors.initials: MA
authors.lastname: Sloan
authors.forename: C B
authors.initials: CB
authors.lastname: Granger
authors.forename: J P
authors.initials: JP
authors.lastname: Weisenberger
authors.forename: C L
authors.initials: CL
authors.lastname: Green
authors.forename: E J
authors.initials: EJ
authors.lastname: Topol
authors.forename: K W
authors.initials: KW
authors.lastname: Mahaffey
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D006408:Hematoma, Subdural / Q000139:chemically induced / Q000000981:diagnostic imaging* / Q000188:drug therapy; D006801:Humans; D007091:Image Processing, Computer-Assisted; D009203:Myocardial Infarction / Q000188:drug therapy; D011379:Prognosis; D015912:Thrombolytic Therapy / Q000009:adverse effects / Q000592:standards; D014057:Tomography, X-Ray Computed / Q000379:methods*