• Daniela Gompelmann, Ralf Eberhardt, Dirk-Jan Slebos, Matthew S Brown, Fereidoun Abtin, Hyun J Kim, Debby Holmes-Higgin, Sri Radhakrishnan, Felix J F Herth, and Jonathan Goldin.
• Pneumology and Critical Care Medicine, Thoraxklinik at University of Heidelberg, Heidelberg, Germany; Translational Research Center Heidelberg, Member of the German Center for Lung Research, Heidelberg, Germany.
• Respirology. 2014 May 1; 19 (4): 524-30.

Background And ObjectiveEndobronchial valve (EBV) therapy is optimized in patients who demonstrate little or no collateral ventilation (CV). The accuracy of the Chartis System and visual assessment of high-resolution computerized tomography (HRCT) fissure completeness by a core radiology laboratory for classifying CV status was compared by evaluating the relationship of each method with target lobe volume reduction (TLVR) after EBV placement.MethodsRetrospective HRCT fissure analysis of a study population who underwent catheter-based measurement of CV followed by complete occlusion of the targeted lobe by EBV. Accuracy, sensitivity, specificity, positive predictive value and negative predictive value of the HRCT fissure analysis and the catheter-based measurement of CV for predicting TLVR was determined.ResultsAccuracy for correctly classifying TLVR with EBV was similar for Chartis System and HRCT fissure analysis (74 vs 77%). The sensitivity and specificity of the Chartis measurement were 86% and 61% and those of HRCT fissure analysis 75% and 79%. Patients with TLVR ≥ 350 mL had statistically significant improvement in respiratory function, exercise performance and quality of life measures.ConclusionsWhen evaluating patients for likelihood of successful EBV therapy, the Chartis System CV assessment and HRCT fissure analysis appear to have comparable accuracy. Both techniques were found to be beneficial for EBV procedure planning.© 2014 The Authors. Respirology © 2014 Asian Pacific Society of Respirology.

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