TY  - JOUR
A1  - Won, Sae-Yeon
A1  - Zagorcic, Andrea
A1  - Dubinski, Daniel
A1  - Quick-Weller, Johanna
A1  - Herrmann, Eva
A1  - Seifert, Volker
A1  - Konczalla, Jürgen
T1  - Excellent accuracy of ABC/2 volume formula compared to computer-assisted volumetric analysis of subdural hematomas
T2  - PLoS one
N2  - Background: Subdural hematoma (SDH) is a common disease associated with high morbidity, which is becoming more prominent due to the increasing incidence. Decision for a surgical evacuation is made depending on the clinical appearance and the volume of SDH, wherefore it is important to have a simple ‘bedside’ method to measure and compare the volume of SDH.
Objective: The aim of the study was to verify the accuracy of the simplified ABC/2 volumetric formula to determine a valuable tool for the clinical practice.
Methods: Preoperative CT-scans of 83 patients with SDHs were used for the computer-assisted volumetric measurement via BrainLab® as well as the ABC/2 volumetric measurement. A = largest length (anterior to posterior) of the SDH; B = maximum width (lateral to midline) 90° to A; C = maximum height (coronal plane or multiplication of slices) of the hematoma. These measurements were performed by two independent clinicians in a blinded fashion. Both volumes were compared by linear regression analysis of Pearson and Bland-Altman regression analysis.
Results: Among 100 SDHs, 53% were under an 47% were over 100cm3 showing a well distribution of the hematoma sizes. There was an excellent correlation between computer-assisted volumetric measurement and ABC/2 (R2 = 0.947, p<0.0001) and no undesirable deviation and trend were detected (p = 0.101; p = 0.777). A 95% tolerance region of the ratios of both methods was [0.805–1.201].
Conclusion: The ABC/2 method is a simple and fast bedside formula for the measurement of SDH volume in a timely manner without limited access through simple adaption, which may replace the computer-assisted volumetric measurement in the clinical and research area. Reason for the good accuracy seems to be the spherical form of SDH, which has a similarity to a half ellipsoid.
KW  - Ellipsoids
KW  - Linear regression analysis
KW  - Regression analysis
KW  - Volumetric analysis
KW  - Morbidity
KW  - Epidural block
KW  - Hemorrhage
KW  - Medical ethics
Y1  - 2018
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/46828
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-468281
SN  - 1932-6203
N1  - Copyright: © 2018 Won et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
VL  - 13
IS  - (6): e0199809
SP  - 1
EP  - 6
PB  - PLoS
CY  - Lawrence, Kan.
ER  -