RT Journal Article SR Electronic T1 Hypercapnia as the influencing factor of pulse oximetry JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1670 OP 1670 DO 10.1183/09031936.00114608 VO 32 IS 6 A1 Hinkelbein, J. A1 Genzwuerker, H. V. YR 2008 UL http://erj.ersjournals.com/content/32/6/1670.1.abstract AB