ABC/2 estimation in intracerebral hemorrhage: A comparison study between emergency radiologists and emergency physicians

Dsouza, Landric B; Pathan, Sameer A.; Bhutta, Zain A.; Thomas, Sarah A.; Momin, Umais; Mirza, Salman; Elanani, Rabab; Qureshi, Rizwana Aleem; Khalaf, Waled; Thomas, Stephen

doi:10.1016/j.ajem.2018.12.036

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…The ABC/2 method, or XYZ/2, is a reliable and simple technique to estimate volumes of intracranial pathologies such as intracranial hematomas [6,7]. Using the ABC/2 formula, an excellent level of agreement between clinicians had been observed in estimating intracerebral haematomas (ICH) and epidural haematomas (EDH), acute subdural haematomas (aSDH), and chronic subdural haematoma (cSDH) volumes [8][9][10][11][12][13]. However, the accuracy of this formula for other intracranial conditions such as arteriovenous malformation (AVM) volume estimation was low [14].…”

Section: Introductionmentioning

confidence: 99%

ABC/2 formula for “bedside” postoperative pneumocephalus volume measurement

et al. 2022

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Background Postoperative pneumocephalus is associated with a higher risk of recurrence of chronic subdural hematoma (cSDH). However, there is no verified simple way to measure the pneumocephalus volume at the bedside for daily clinical use. The ABC/2 method was shown to be a simple and reliable technique to estimate volumes of intracranial lesions, such as intracranial hematomas. This study aims to evaluate the accuracy of the ABC/2 formula in estimating volumes of pneumocephalus, as compared to the gold standard with computer-assisted volumetric analysis. Methods A total of 141 postoperative computed tomographic (CT) brain scans of cSDH patients with burr-hole drainage were analysed. Pneumocephalus volume was measured independently by both the ABC/2 formula and the computer-assisted volumetric measurement. For the computer-assisted measurement, the volume of the air was semiautomatically segmented and calculated by computer software. Linear regression was used to determine the correlation between the ABC/2 method and computer-assisted measurement. Results The postoperative pneumocephalus volume after bilateral burr-hole drainage was significantly larger than that of unilateral burr-hole drainage (29.34 ml versus 12.21 ml, p < 0.001). The estimated volumes by the formula ABC/2 significantly correlated to the volumes as measured by the computer-assisted volumetric technique, with r = 0.992 (p < 0.001). The Pearson correlation coefficient is very close to 1, which signifies a very strong positive correlation, and it is statistically significant. Conclusions An excellent correlation is observed between the ABC/2 method and the computer-assisted measurement. This study verified that the ABC/2 method is an accurate and simple “bedside” technique to estimate pneumocephalus volume.

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