Blood gas analysis
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In medicine and physiology, blood gas analysis is "measurement of oxygen and carbon dioxide in the blood."[1]
Venous blood
One study concluded "The mean difference between arterial and venous values of pH was 0.03 pH units."[2] If the pCO2 of of venous blood is less than 45 mm Hg, then the arterial pCO2 is very likely less than 50 mm hg.[3] Regarding pO2, venous pO2 is much lower.[4]
Artifacts in measurement
Delay in analysis after collection of blood
Exposure of bllod to room aire
References
- ↑ Anonymous (2024), Blood gas analysis (English). Medical Subject Headings. U.S. National Library of Medicine.
- ↑ Middleton P, Kelly AM, Brown J, Robertson M (August 2006). "Agreement between arterial and central venous values for pH, bicarbonate, base excess, and lactate". Emerg Med J 23 (8): 622–4. DOI:10.1136/emj.2006.035915. PMID 16858095. Research Blogging.
- ↑ Kelly AM, Kerr D, Middleton P (May 2005). "Validation of venous pCO2 to screen for arterial hypercarbia in patients with chronic obstructive airways disease". J Emerg Med 28 (4): 377–9. DOI:10.1016/j.jemermed.2004.10.017. PMID 15837016. Research Blogging.
- ↑ Yildizdaş D, Yapicioğlu H, Yilmaz HL, Sertdemir Y (February 2004). "Correlation of simultaneously obtained capillary, venous, and arterial blood gases of patients in a paediatric intensive care unit". Arch. Dis. Child. 89 (2): 176–80. PMID 14736638. PMC 1719810. [e]