Related Experiment Videos
The ABCs of measuring intracerebral hemorrhage volumes
R U Kothari1, T Brott, J P Broderick
1Department of Emergency Medicine, University of Cincinnati, Ohio 45267-0769, USA. Rashmikant.Kothari@uc.edu
Insights
A simple bedside formula accurately estimates intracerebral hemorrhage (ICH) volume in under a minute. This rapid method correlates well with computer analysis, aiding in predicting patient mortality.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Intracerebral hemorrhage (ICH) volume is a critical predictor of 30-day mortality.
- Accurate and rapid ICH volume measurement is essential for patient management.
Purpose of the Study:
- To compare a bedside CT method for measuring ICH volume against computer-assisted planimetric analysis.
- To validate the accuracy and reliability of a simplified bedside formula for ICH volume estimation.
Main Methods:
- Utilized the ABC/2 formula for bedside CT measurement of ICH volume.
- A represents the greatest hemorrhage diameter, B the perpendicular diameter, and C the hemorrhage depth (number of slices x slice thickness).
- Compared bedside measurements with computer-assisted planimetric analysis for 118 patients.
Main Results:
- Bedside ICH volume measurements were obtained in an average of 38 seconds.
- The ABC/2 formula showed strong correlation with planimetric measurements (R² = 0.96).
- Demonstrated excellent interrater and intrarater reliability (intraclass correlation = 0.99).
Conclusions:
- The ABC/2 formula provides an accurate and rapid method for estimating ICH volume at the bedside.
- This simple formula can be reliably used in clinical settings for quick ICH volume assessment.
- Accurate bedside estimation of ICH volume can be achieved in less than one minute.
Background And Purpose:
Hemorrhage volume is a powerful predictor of 30-day mortality after spontaneous intracerebral hemorrhage (ICH). We compared a bedside method of measuring CT ICH volume with measurements made by computer-assisted planimetric image analysis.
Methods:
The formula ABC/2 was used, where A is the greatest hemorrhage diameter by CT, B is the diameter 90 degrees to A, and C is the approximate number of CT slices with hemorrhage multiplied by the slice thickness.
Results:
The ICH volumes for 118 patients were evaluated in a mean of 38 seconds and correlated with planimetric measurements (R2 = 9.6). Interrater and intrarater reliability were excellent, with an intraclass correlation of .99 for both.
Conclusions:
We conclude that ICH volume can be accurately estimated in less than 1 minute with the simple formula ABC/2.