Questions tagged [laboratory]

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Why is there a difference between venous bicarbonate and bicarbonate in ABG?

Lets say a serum blood test shows bicarbonate of 20mmol/l but an ABG of 15mmol/l, both tests taken 3 minutes apart in a person with acute metabolic acidosis with compensation. Can anyone explain why ...
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95 views

Why is prothrombin time used to monitor warfarin and not aPTT?

Warfarin is said to change prothrombin time (PT) but not activated partial thromboplastin time (aPTT) (for practical purposes at least anyways, not really sure). But looking at the mechanism of action ...
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3answers
189 views

Was it a lab accident or something else that re-released H1N1 in 1977?

In the highly cited 2006 review of Taubenberger and Morens it is mentioned that: The impact of this pandemic was not limited to 1918–1919. All influenza A pandemics since that time, and indeed ...
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Having tested positive for COVID-19, will future tests be positive?

The World Health Organization indicates the COVID-19 genome is detected in assays. Once a patient tests positive, is there any reason not to expect that future instances of the same assay will result ...