Correction After publication of our article [1], we noticed that under the methods section the third formula is incorrectly presented. ‘Vd/Vt’ should replace ‘VD’ to read as follows: Vd/Vt = 1 – [(0.86 × V • CO 2est )/VE × PaCO 2 )] Author details 1 Department of Radiology, Mayo Clinic College of Medicine, 200 1stStreet, Rochester 55905, USA. 2 Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Mayo Clinic College of Medicine, 200 1stStreet, Rochester 55905, USA. 3 Department of Anesthesiology and Critical Care, Akdeniz University, Dumlupinar Bulvari Kampus, Antalya 0709, Turkey. 4 Department of Medicine, Pulmonary and Critical Care Unit, Medical Intensive Care Unit, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St, Boston, MA 02114, USA. Published: 12 April 2011 Reference 1. Siddiki H, Kojicic M, Li G, Yilmaz M, Thompson TB, Hubmayr RD, Gajic O: Bedside quanti cation of dead-space fraction using routine clinical data in patients with acute lung injury: secondary analysis of two prospective trials. Crit Care 2010, 14:R141 © 2010 BioMed Central Ltd Correction: Bedside quanti cation of dead-space fraction using routine clinical data in patients with acute lung injury: secondary analysis of two prospective trials Hassan Siddiki 1 , Marija Kojicic 2 , Guangxi Li 2 , Murat Yilmaz 3 , Taylor B Thompson 4 , Rolf D Hubmayr 2 and Ognjen Gajic* 2 See related research by Siddiki et al., http://ccforum.com/content/14/4/R141 CORRECTION *Correspondence: gajic.ognjen@mayo.edu 2 Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Mayo Clinic College of Medicine, 200 1stStreet, Rochester 55905, USA Full list of author information is available at the end of the article doi:10.1186/cc10095 Cite this article as: Siddiki H, et al.: Correction: Bedside quanti cation of dead-space fraction using routine clinical data in patients with acute lung injury: secondary analysis of two prospective trials. Critical Care 2011, 15:410. Siddiki et al. Critical Care 2011, 15:410 http://ccforum.com/content/15/2/410 © 2011 BioMed Central Ltd . Li G, Yilmaz M, Thompson TB, Hubmayr RD, Gajic O: Bedside quanti cation of dead-space fraction using routine clinical data in patients with acute lung injury: secondary analysis of two prospective. BioMed Central Ltd Correction: Bedside quanti cation of dead-space fraction using routine clinical data in patients with acute lung injury: secondary analysis of two prospective trials Hassan. end of the article doi:10.1186/cc10095 Cite this article as: Siddiki H, et al.: Correction: Bedside quanti cation of dead-space fraction using routine clinical data in patients with acute lung