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.

Avsnitt(1145)

Podcast 862: How to Apply a Painful Stimulus

Podcast 862: How to Apply a Painful Stimulus

Contributor: Travis Barlock MD Educational Pearls: When might you need to apply a painful stimulus in a medical setting? The main reason is to assess the patient's level of consciousness, such as wh...

31 Juli 20232min

Podcast 861: Alcohol Withdrawal and Delirium Tremens

Podcast 861: Alcohol Withdrawal and Delirium Tremens

Contributor: Travis Barlock MD Educational Pearls: Alcohol binds the GABA receptor, which produces an inhibitory response, hence the "depressive" effects of ethanol beverages. Over time, alcohol d...

24 Juli 20234min

Ukraine Brewtalk Featuring Dr. Dave Young

Ukraine Brewtalk Featuring Dr. Dave Young

Contributors: David Young MD, John Hesling MD, Travis Barlock MD, Jeffrey Olson Summary: In this episode, Dr. Travis Barlock and Jeffrey Olson meet in the studio to discuss several clips from the even...

21 Juli 202338min

Podcast 860: Thyrotoxicosis

Podcast 860: Thyrotoxicosis

Contributor: Travis Barlock MD Educational Pearls: Clinical picture: A patient comes in with altered mental status, tachycardia, fever, elevated T4, and low TSH. What's the diagnosis?... Thyrotoxicosi...

20 Juli 20232min

Podcast 859: Teamwork Really Makes the Dream Work

Podcast 859: Teamwork Really Makes the Dream Work

Contributor: Aaron Lessen MD Educational Pearls: 33 Medical residents and 91 nurses at Massachusetts General Hospital were randomized into two groups: Intervention group: 15 PGY-1 residents assig...

10 Juli 20232min

Podcast 858: Whole Blood Pregnancy Test

Podcast 858: Whole Blood Pregnancy Test

Contributor: Meghan Hurley MD Educational Pearls: What do you do if you need a stat pregnancy test on an incapacitated patient? You can send a serum quantitative human chorionic gonadotropin (beta-H...

3 Juli 20234min

Podcast 857: Alice in Wonderland Jeopardy

Podcast 857: Alice in Wonderland Jeopardy

Contributor: Chris Holmes MD Educational Pearls: "It's a poor sort of memory that only works backwards" - Transient Global Amnesia A syndrome with sudden retrograde memory loss in which patients ...

26 Juni 20233min

Podcast 856: ED Errors and Counterstudy

Podcast 856: ED Errors and Counterstudy

Contributor: Nicholas Tsipis, MD Educational Pearls: What study was Dr. Tsipis talking about? In December of 2022, the Agency for Healthcare Research and Quality (AHRQ) put out a study titled "Diagn...

19 Juni 20234min

Populärt inom Vetenskap

p3-dystopia
dumma-manniskor
svd-nyhetsartiklar
allt-du-velat-veta
kapitalet-en-podd-om-ekonomi
det-morka-psyket
pojkmottagningen
dumforklarat
rss-vetenskapsradion
rss-vetenskapsradion-2
sexet
halsorevolutionen
rss-ufo-bortom-rimligt-tvivel
rss-experimentet
rss-broccolipodden-en-podcast-som-inte-handlar-om-broccoli
rss-spraket
medicinvetarna
bildningspodden
vetenskapsradion
rss-lara-fran-larda-en-fackbok-och-en-forfattare