METHEMOGLOBIN

Methemoglobin

Normally one to two percent of a person's hemoglobin is methemoglobin; a higher percentage than this can be genetic or caused by exposure to various chemicals and depending on the level can cause health problems known as methemoglobinemia. A higher level of methemoglobin will tend to cause a pulse oximeter to read closer to 85% regardless of the true level of oxygen saturation.

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methemoglobin

Noun

  1. An oxidized form of hemoglobin, containing ferric rather than ferrous iron, that cannot transport oxygen.


The above text is a snippet from Wiktionary: methemoglobin
and as such is available under the Creative Commons Attribution/Share-Alike License.

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