Frank Oliver Henes MD, Presenter: Nothing to Disclose

Marc Regier, Abstract Co-Author: Nothing to Disclose

Peter Bannas MD, Abstract Co-Author: Nothing to Disclose

Kai Muellerleile, Abstract Co-Author: Nothing to Disclose

Gerhard B. Adam MD, Abstract Co-Author: Nothing to Disclose

Michael Groth MD, Abstract Co-Author: Nothing to Disclose

To evaluate a new formula for rapid assessment of pericardial effusion (PE) volume by multidetector computed tomography (MDCT).

20 MDCT scans positive for PE were independently reviewed by two observers. Diameters of PE were measured at four locations (superior aortic recess, anterior, posterior and apical). Additionally, PE volume was assessed by volumetry. Correlation was evaluated between PE diameters and volume and linear equation was derived for each diameter location. To test validity and reliabilty of the measurements, intraclass correlation and Bland Altman analysis were performed.

Good validity was expressed by strong correlation between diameter measurements  at all four locations and PE volume (all R-values > 0.8 and p-values < 0.0001). Intraclass correlation (all ICCs > 0.75) and Bland Altman analysis revealed good inter- and intrareliability of diameter measurements. Best values were observed for apical diameter measurements. The following linear equation was derived for apical diameter measurements: PE volume = 0.296 (ml/cm) x apical diameter (cm) – 32 ml.

PE volume can rapidly be assessed by apical PE diameter measurement using the simplified formula: PE volume = 0.3 (ml/cm) x apical diameter (cm).

In clinical practice a rapid estimation of PE volume in CT is useful to evaluate the hemodynamic relevance of PE and to consider relief by surgical drainage or pericardiocentesis.

Henes, F, Regier, M, Bannas, P, Muellerleile, K, Adam, G, Groth, M, A New Formula for Rapid Assessment of Pericardial Effusion Volume by Multidetector Computed Tomography.  Radiological Society of North America 2011 Scientific Assembly and Annual Meeting, November 26 - December 2, 2011 ,Chicago IL. http://archive.rsna.org/2011/11008751.html