Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A brownish-red form of hemoglobin that occurs when hemoglobin is oxidized either during decomposition of the blood or by the action of various oxidizing drugs or toxic agents. It contains iron in the ferric state and cannot function as an oxygen carrier.

from The Century Dictionary.

  • noun A modification of hemoglobin, into which it can be reconverted.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[met(a)– + hemoglobin.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Combination of methyl and haemoglobin.

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Examples

  • The altered form, called methemoglobin, loses the ability to bind oxygen, and the pigment now changes to greenish brown or almost black.

    American Scientist Online 2009

  • The altered form, called methemoglobin, loses the ability to bind oxygen, and the pigment now changes to greenish brown or almost black.

    American Scientist Online 2009

  • The altered form, called methemoglobin, loses the ability to bind oxygen, and the pigment now changes to greenish brown or almost black.

    American Scientist Online 2009

  • These metabolites cause hemoglobin to be oxidized to methemoglobin which is unable to transport oxygen. 3 The presence of significant amounts of methemoglobin causes normal hemoglobin to hold on tighter to oxygen.

    Phenazopyridine 2010

  • If methemoglobin levels are analyzed soon after sampling, levels may correlate with clinical signs and symptoms.

    Phenazopyridine 2010

  • A methemoglobin level drawn on admission was 60.9 percent.

    Phenazopyridine 2010

  • We need to send the blood for a methemoglobin level as well as an ABG.

    Between Expectations Md Meghan Maclean Weir 2011

  • A repeat methemoglobin determination, thirty minutes later, revealed a level of 22.5 percent, which declined to 13.5 percent 13 hours post admission.

    Phenazopyridine 2010

  • We need to send the blood for a methemoglobin level as well as an ABG.

    Between Expectations Md Meghan Maclean Weir 2011

  • The criteria for methylene blue therapy include symptomatic patients and asymptomatic patients with methemoglobin levels greater than 30 percent.

    Phenazopyridine 2010

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