This updated episode of CRACKCast covers Rosen’s Chapter 005, Monitoring the Emergency Patient (9th Ed.).

Core Questions:

1. List modalities for measurement of BP and note which modalities are likely to over and underestimate blood pressure.
2. What is pulse pressure and how does it relate to stroke volume?
3. List 4 indications for an arterial line.
4. What is the Beer-Lambert Law and how does it allow us to measure pulse oximetry?
5. How do dyshemoglobinemias affect your measured SpO2?
6. What are the 4 phases of the ETCO2 waveform?
7. List 5 uses for ETCO2.

Wisecracks:

1. List the pitfalls of pulse oximetry.
   1. Purple
   2. Yellow
   3. Tan  
2. Describe colorimetric ETCO2 monitoring and cite the ranges at which you would expect to see the following colours:
3. How are ETCO2 values related to PaCO2?
4. What are causes of elevated ETCO2?
5. What does MOVIE stand for (aka - how to rock your oral exam resus questions)?