Podcast #322: Methemoglobinemia

Podcast #322: Methemoglobinemia

Author: Nick Hatch, M.D.

Educational Pearls:

  • Methemoglobinemia is when the iron in hemoglobin is in the Fe3+ (ferric) state rather than the normal Fe2+ (ferrous) state. Methemoglobin cannot release oxygen at the tissues.
  • Symptoms include cyanosis, headache, tachycardia, dyspnea, and lethargy.
  • Suspect in setting of hypoxia that does not improve with oxygenation, and clinical cyanosis with a normal PaO2 on ABG.
  • Treatment is methylene blue which reduces the iron back to the ferrous state.
  • Causes can be Dapsone, Lidocaine, Benzocaine.

References:

Agarwal N, Nagel RL, Prchal JT. Dyshemoglobinemias. In: Disorders of Hemoglobin: Genetics, Pathophysiology, and Clinical Management, 2nd ed, Steinberg M (Ed), 2009. P.607

Cortazzo JA, Lichtman AD. (2014). Methemoglobinemia: a review and recommendations for management. Journal of Cardiothoracic and Vascular Anesthesia. 28:1043.

Darling R, Roughton F. (1942). The effect of methemoglobin on the equilibrium between oxygen and hemoglobin. American Journal of Physiology. 137:56.

Jaksot(1145)

Podcast 890: Outdoor Cold Air for Croup

Podcast 890: Outdoor Cold Air for Croup

Contributor: Jared Scott MD Educational Pearls: Croup is a respiratory condition typically caused by a viral infection (e.g., parainfluenza). The disease is characterized by inflammation of the lary...

14 Helmi 20244min

Podcast 889: Blood Pressure Cuff Size

Podcast 889: Blood Pressure Cuff Size

Contributor: Aaron Lessen MD Educational Pearls: Does the size of a blood pressure (BP) cuff matter? A recent randomized crossover trial revealed that, indeed, cuff size can affect blood pressure read...

5 Helmi 20241min

Podcast 888: Low GCS and Intubation

Podcast 888: Low GCS and Intubation

Contributor: Aaron Lessen MD Educational Pearls: Is the adage, "GCS of 8, you've got to intubate" accurate? A recent study published in the November 2023 issue of JAMA attempted to answer this questio...

29 Tammi 20242min

Podcast 887: Family Presence in Cardiac Resuscitation

Podcast 887: Family Presence in Cardiac Resuscitation

Contributor: Aaron Lessen MD Educational Pearls: A 2013 study randomized families of those in cardiac arrest into two groups: Actively offered patients' families the opportunity to observe CPR ...

22 Tammi 20242min

Podcast 886: Cough in Kids

Podcast 886: Cough in Kids

Contributor: Ricky Dhaliwal, MD Educational Pearls: Croup Caused by: Parainfluenza, Adenovirus, RSV, Enterovirus (big right now) Age range: 6 months to 3 years Symptoms: Barky cough ...

15 Tammi 20246min

Podcast 885: Penetrating Neck Injuries

Podcast 885: Penetrating Neck Injuries

Contributor: Ricky Dhaliwal MD Educational Pearls: Three zones of the neck with different structures and risks for injuries: Zone 1 is the most caudal region from the clavicle to the cricoid cart...

10 Tammi 20244min

Laboring Under Pressure Episode 2: Postpartum Hemorrhage with Dr. Kiersten Williams

Laboring Under Pressure Episode 2: Postpartum Hemorrhage with Dr. Kiersten Williams

Contributor: Kiersten Williams MD, Travis Barlock MD, Jeffrey Olson MS2 Summary: In this episode, Dr. Travis Barlock and Jeffrey Olson meet in the studio to discuss a clip from Dr. Williams' talk at t...

8 Tammi 202425min

Podcast 884: Nerve Blocks

Podcast 884: Nerve Blocks

Contributor: Meghan Hurley MD Educational Pearls: What is a nerve block? A nerve block is the medical procedure of injecting anesthetic into the area around a nerve to block pain signals. They ar...

1 Tammi 20246min

Suosittua kategoriassa Tiede

tiedekulma-podcast
rss-mita-tulisi-tietaa
rss-poliisin-mieli
docemilia
radio-antro
utelias-mieli
filocast-filosofian-perusteet
rss-sosiopodi
ihanat-ipanat
mielipaivakirja
rss-bios-podcast
rss-duodecim-lehti
rss-ammamafia
rss-laakaripodi
rss-opeklubi