CRACKCast E202 – Cyanosis - a podcast by The CanadiEM.org Team
from 2019-06-03T12:00
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Core Questions:
- Define cyanosis and explain what causes it?
- What is central cyanosis and what typically causes it?
- What is peripheral cyanosis and what typically causes it?
- At what concentration of deoxyhemoglobin does cyanosis present?
- List 10 differential diagnoses for cyanosis - Box 11.2?
- Describe your initial workup for the patient with cyanosis.- Figure 11.3/11.4
- What is the oxyhemoglobin dissociation curve and what information can be taken from it? - Figure 11.1
- Name four factors that shift the oxyhemoglobin dissociation curve to the left and three factors that shift it to the right.
- Differentiate between ferrous and ferric hemoglobin and describe how these forms of hemoglobin affect oxygen binding.
- What is methemoglobinemia and how does it present?
- What are the two biochemical pathways that are used to reduce methemoglobin?
- List 10 causes of methemoglobinemia - See Box 11.1
- What is sulfhemoglobinemia and when should you suspect it?
- Differentiate between primary, secondary, and relative polycythemia and how does it cause cyanosis?
Wisecracks:
- What is the colour of the blood in a patient with methemoglobinemia?
- What is clubbing and what causes it?
- What SpO2 is present on the monitor in the patient with a methemoglobinemia?
- What is the hyperoxia test and how does it help you in your workup of the cyanotic patient?
- What is the dose of methylene blue when prescribed to treat patients with methemoglobinemia?
Further episodes of CanadiEM Podcasts: CRACKCast, ClerkCast, CarmsCast, First Year Diaries
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