Results: Patient age ranged from 18 to 93 years. ETCO 2 was measured within 24 hours of presentation in all 479 patients. Symptoms, demographic data, Well's score, D-dimer levels and the gold standard computed tomography pulmonary angiogram (CTPA) results were collected for analysis. Methods: 479 consecutive patients with suspected PEs were enrolled over 3 years in 2012-20. We aimed to define the optimum ETCO 2 to exclude a pulmonary emboli (PE) event conclusively. Objective: End-tidal CO2 (ETCO 2) can represent dead space ventilation.
NHS Trust, Duckworth Lane,Bradford West Yorkshire, BD9 6RJ and Dr Mojgan Najafzadeh, Lecturer and Medical Research Fellow,īiochemistry and Biosciences Department University of Bradford, Richmond Building, Richmond Road, BD7 1DP Bradford, UK Abstract *Corresponding author: Prof Badie Jacob, Respiratory Consultant and Senior Lecturer, Bradford Teaching Hospitals Foundation Mojgan Najafzadeh *3, Imad Riaz 1, Jonathan Walker 2, Hassan Ugail 4, Andrew Scally 4, Badie Jacob ⃰1ġ.Bradford Teaching Hospitals NHS Foundation Trust, Bradford Royal Infirmary, Duckworth Lane, BD9 6RJĢ.Calderdale and Huddersfield NHS Foundation Trust, Calderdale Royal Infirmary, Halifax HX3 0PWģ.School of Life Sciences, University of Bradford, Bradford, BD7 1DP, UKĤ.Centre for Visual Computing, School of Engineering and Informatics, University of Bradford, Bradford, BD7 1DP, UKĥ.School of Clinical Therapies, University College Cork, Gaol Walk, Cork, Ireland, T12 YN60
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