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==Other diagnostic studies==
==Other diagnostic studies==


Two additional bedside methods exist for detection of methemoglobin in the blood.  
One additional bedside methods exists for detection of methemoglobin in the blood.  


The first one includes insufflating 100% oxygen in a tube that contains the patient’s blood.  IF the blood remains dark, probably the cause is because eof presence of MetHb.  
It consist of placing couple of drops of blood on white filter paper, and check for change in the color of the blood when you expose the paper to oxygenSimply deoxygenated hemoglobin will change its color from dark red to bright red, whereas methemoglobin will not. <ref>{{ Ann Emerg Med. 2010 Feb;55(2):184-9. doi: 10.1016/j.annemergmed.2009.07.022. Epub 2009 Oct 8.
A simple quantitative bedside test to determine methemoglobin.
Shihana F1, Dissanayake DM, Buckley NA, Dawson AH. pmid=19818531 }}</ref>


The second one consist of placing couple of drops of blood on white filter paper, and check for change in the colour of the blood when you expose the paper to oxygen.
 
Simply deoxygenated hemoglobin will change its colour from dark red to bright red, whereas methemoglobin will not.
 
{{Reflist|2}}


==References==
==References==

Revision as of 00:32, 30 April 2018

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Overview

Congenital (Hereditary) Methemoglobinemia

There are three main congenital conditions that lead to methemoglobinemia:

1. Cytochrome b5 reductase deficiency and pyruvate kinase deficiency

2. G6PD deficiency

3. Presence of abnormal hemoglobin.


Acquired or Acute Methemoglobinemia

Most common cause include different oxidant drugs, toxins or chemicals

Other diagnostic studies

One additional bedside methods exists for detection of methemoglobin in the blood.

It consist of placing couple of drops of blood on white filter paper, and check for change in the color of the blood when you expose the paper to oxygen. Simply deoxygenated hemoglobin will change its color from dark red to bright red, whereas methemoglobin will not. [1]


  1. {{ Ann Emerg Med. 2010 Feb;55(2):184-9. doi: 10.1016/j.annemergmed.2009.07.022. Epub 2009 Oct 8. A simple quantitative bedside test to determine methemoglobin. Shihana F1, Dissanayake DM, Buckley NA, Dawson AH. pmid=19818531 }}

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