Let's head to the triage room - we have a patient waiting.
You:
Feeling dizzy?
I am sorry!
Do you mind holding still for a few seconds?
How does that feel?
Pt #1: Much better!
You (internal dialogue): Phew. Probably not a stroke.
BBPV vs presyncope?
You: Great!
Does it come back when you move your head?
What about standing up?
Depending on the conversation and exam our toolkit is 1. Vitals 2. Orthostatics 3. Dix-Hallpike 4. EKG
Pt #2: Not good...it's still there.
You: Ugh. I am sorry.
Let us take a look at your eyes moving.
Aah. We see why you are dizzy (explain nystagmus to patient)
We are going to do a short exam to help us understand why.
Today’s topic: “The sample is hemolyzed” - In vitro vs In vivo
2/ The lab notifies you “the sample is hemolyzed.”
First step in reasoning, did the hemolysis occur in the patient (in vivo) or during collection of the specimen (in vitro “ex vivo”), eg., prolonged application of tourniquet
3/ In vivo hemolysis -> need to determine cause of hemolysis
In vitro hemolysis -> usually consequence of collection technique