Arterial versus capillary blood gases: a meta-analysis
GS Zavorsky, J Cao, NE Mayo, R Gabbay… - Respiratory physiology & …, 2007 - Elsevier
A meta-analysis determined whether capillary blood gases accurately reflect arterial blood
samples. A mixed effects model was used on 29 relevant studies obtained from a
PubMed/Medline search. From 664 and 222 paired samples obtained from the earlobe and
fingertip, respectively, earlobe compared to fingertip sampling shows that the standard
deviation of the difference is about 2.5× less (or the precision is 2.5× better) in resembling
arterial PO2 over a wide range of arterial PO2's (21–155mmHg). The lower the arterial PO2 …
samples. A mixed effects model was used on 29 relevant studies obtained from a
PubMed/Medline search. From 664 and 222 paired samples obtained from the earlobe and
fingertip, respectively, earlobe compared to fingertip sampling shows that the standard
deviation of the difference is about 2.5× less (or the precision is 2.5× better) in resembling
arterial PO2 over a wide range of arterial PO2's (21–155mmHg). The lower the arterial PO2 …
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