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EMCrit Podcast 6 – Push-Dose Pressors

EMCrit FOAM Feed

Scott D. Weingart, MD FCCM

Health & Fitness, Science, Medicine

4.82K Ratings

🗓️ 10 July 2009

⏱️ 11 minutes

🧾️ Download transcript

Summary

Note: Please listen to the PDP update episode either before or immediately after listening to this one Finally a non-intubation topic! Bolus dose pressors and inotropes have been used by the anesthesiologists for decades, but they have not penetrated into standard emergency medicine practice. I don’t know why. They are the perfect solution to short-lived hypotension, e.g. post-intubation or during sedation. They also can act as a bridge to drip pressors while they are being mixed or while a central line is being placed. Click Here for printable sheet with mixing instructions Epinephrine Do not give cardiac arrest doses (1 mg) to patients with a pulse Has alpha and beta-1/2 effects so it is an inopressor Onset-1 minute Duration-5-10 minutes Mixing Instructions: Take a 10 ml syringe with 9 ml of normal saline Into this syringe, draw up 1 ml of epinephrine from the cardiac amp (amp contains Epinephrine 100 mcg/ml) Now you have 10 mls of Epinephrine 10 mcg/ml Dose: 0.5-2 ml every 1-5 minutes (5-20  mcg) No extravasation worries! Mixing Video: Phenylephrine Phenyl as a bolus dose is clean, quick, and never causes trouble. But... It is pure alpha, so no intrinsic inotropy; it may increase coronary perfusion which can improve cardiac output. I only use this in tachycardic patients (and even then, only sometimes) Onset-1 minute Duration- 5-10 minutes (usually 5) Mixing Instructions: Take a syringe and draw up 1 ml of phenylephrine from the vial (vial concentration must be 10 mg/ml) Inject this into a 100 ml bag of NS Now you have 100 mls of phenylephrine 100 mcg/ml Draw up some into a syringe; each ml in the syringe is 100 mcg Dose: 0.5-2 ml every 1-5 minutes (50-200 mcg) No extravasation worries! Mixing Video: Ephedrine I don’t use this one, listen to the podcast to hear why. I put it here solely for the anesthesiologists on the blog. Onset-Near Instant Duration-1 hour Mixing Instructions: Take a 10 ml syringe with 9 ml of normal saline Into this syringe, draw up 1 ml of ephedrine from the vial (vial contains Ephedrine 50 mg/ml) Now you have 10 mls of Ephedrine 5 mg/ml Dose: 1-2 ml every 2-5 minutes (5-10 mg) No extravasation worries! Additional Video of a Real Patient By Larry Mellick's Crew Update: This study compares push-dose phenylephrine to continuous infusion--no difference between the two (Anesthesia Analgesia 21012;115(6):1343) First article in the ED demonstrates efficacy on blood pressure (The Journal of Emergency Medicine Volume 49, Issue 4, October 2015, Pages 488–494) Here is a review article from the nursing literature Now on to the Podcast...

Transcript

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0:00.0

Hello and welcome to podcast number six of the M-Crit podcast. Today we're finally

0:09.1

to get off of intubation topics at least for a little while and we're going to talk about

0:15.3

bolus dose pressers. The anesthesiologist have been using this stuff for years

0:22.0

and it has not penetrated into emergency

0:24.4

medicine. Not sure why? It's so incredibly useful to be able to just give an injection and

0:31.2

rapidly correct blood pressure.

0:35.3

Now you might say to yourself, well, why bother with this?

0:38.3

We could just start them on a pressure drip, but both those pressures are for situations where you have a temporary decrease in blood pressure.

0:46.8

You think it's going to resolve.

0:48.0

Maybe they need some fluids, you putting them in, in the meantime you just want to keep

0:51.8

that blood pressure up to maintain

0:53.9

profusion to the heart, lungs, and brain. Maybe it's a post-intubation

0:58.4

hypotension where things are going to get better in a couple of minutes but you don't want to leave them with a map of 40.

1:06.8

You don't have to wait for the nurses to mix these medications.

1:09.1

I'm going to show you how to mix them yourself.

1:11.2

It's very easy, and that way you could rapidly administer treatment

1:16.6

for hypotension while the presser drips usually take a while to get set up.

1:20.5

Beyond that, drips are generally, they have a barrier to entry. You look at

1:27.5

patient like, I don't want to start this guy on a nor epinephrine drip.

1:30.4

He's not that sick. So you just kind of let them languish with a low blood

1:34.7

pressure for a while until it corrects. But with those pressures you really have

1:38.6

minute to minute control of what's going on. We're going to talk about three of them, but I only really

...

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