Start with a free trial account for free content every month. Already a subscriber? Sign in.

Giant Cell Arteritis

00:00
09:14
Sign in or subscribe to listen

No me gusta!

The flash player was unable to start. If you have a flash blocker then try unblocking the flash content - it should be visible below.

Nurses Edition Commentary

Kathy Garvin, RN and Lisa Chavez, RN
00:00
01:20

No me gusta!

The flash player was unable to start. If you have a flash blocker then try unblocking the flash content - it should be visible below.

EMRAP 2019 03 March Written Summary 434 KB - PDF

To view chapter written summaries, you need to subscribe.

Sign up today for full access to all episodes.

Shirin M., M.D. -

We don't have ESR at our shop- Could you comment what the cutoffs are for CRP please?

ilene c. -

I am afraid this answer sucks, but here is the data:

At a cutoff of 0.5 mg/dL, the CRP is basically 100% sensitive (97.5%). But that's a low cutoff. A study using a slightly higher cutoff of 0.8 mg/dL (or 8 mg/L) noted a sensitivity of 86%.

If you want the best odds, a cutoff of 3.5 mg/dL (35 mg/L) has the best with a sensitivity and specificity of 70% and 71%.

I feel like this is a less clear answer and depends on the pretest probability. For someone who is high risk due to vision loss or classic symptoms, I would use 0.5 mg/dL. If it's just for a headache without vision changes or any high-risk features, I think using the higher cutoff of 3.5 mg/dL and following up an ESR as an outpatient with PCP might be fair.

To join the conversation, you need to subscribe.

Sign up today for full access to all episodes and to join the conversation.

To download files, you need to subscribe.

Sign up today for full access to all episodes.
EM:RAP 2019 March Full episode audio for MD edition 207:41 min - 289 MB - M4AEM:RAP 2019 March German Edition Deutsche 90:57 min - 125 MB - MP3EM:RAP 2019 March Aussie Edition Australian 34:56 min - 48 MB - MP3EM:RAP 2019 March Farsi Edition Farsi 64:12 min - 88 MB - MP3EM:RAP 2019 March French Edition Français 22:38 min - 31 MB - MP3EM:RAP 2019 March Spanish Edition Español 78:59 min - 108 MB - MP3EM:RAP 2019 March Canadian Edition Canadian 18:22 min - 25 MB - MP3EMRAP_2019 03 March Board Review Answers_V2 135 KB - PDFEMRAP_2019 03 March Board Review Questions_V2 96 KB - PDFEMRAP 2019 03 March Individual MP3 229 MB - ZIPEMRAP_2019_03_March_Individual_Written 601 KB - ZIPEMRAP 2019 03 March Spanish Written 1 MB - PDFEMRAP 2019 03 March Written Summary 434 KB - PDF

To earn CME for this chapter, you need to subscribe.

Sign up today for full access to all episodes and earn CME.

6 AMA PRA Category 1 Credits™ certified by CEME (EM:RAP)

  1. Complete Quiz
  2. Complete Evaluation
  3. Print Certificate