Questions tagged [laboratory]

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Why have we obtained significantly different results for moisture content on two different brands of moisture analyzers?

Our pharmaceutical laboratory has two moisture analyzers in use; one is Shimadzu MOC3u (MC-A), and the other is Mettler-Toledo HC103 (MC-B). A sample from the same batch was put on each instrument to ...
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How is the structure of the different structural classes of exocrine glands relate to their functions?

Specifically speaking, how would the structures of simple tubular, branched tubular, coiled tubular, simple acinar, branched acing, compound tubular, compound acinar, tubuloacinar relate to each of ...
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What does it mean for eGFR to be “normalized” to BSA?

I’ve seen a few calculators of estimated glomerular filtration rate (eGFR) based on the CKD-EPI mention that the equation does not require the patient’s weight, because the results are reported ...
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Will there be any error in the result if the sample taken for COVID-19 RT PCR test is kept for days before performing the test?

What would be the impact of keeping the sample (nose swab) for 5 days before performing RT-PCR on it? If no, then is there a particular way of storing the sample. Is there any standard set by the ...
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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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3 votes
1 answer
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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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3 answers
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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 ...
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