Podcast #268: Poiseuille's Law

Podcast #268: Poiseuille's Law

Author: Dave Rosenberg, M.D.

Educational Pearls

  • Poiseuille's Law addresses the flow of a fluid through a tube.
  • Many common ED presentations involve alterations in flow: asthma, MI, ischemic stroke, etc.
  • According to the law, flow increases with the 4th power of the radius. That is to say, doubling the radius of the tube will increase the flow by 16x.
  • Therefore, in situations that require re-opening of an anatomic tube (artery, airway), small changes in the size of the opening will result in dramatic effects.

References: https://www.openanesthesia.org/poiseuilles_law_iv_fluids/

Episoder(1146)

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Podcast # 423: Blunt Cardiac Injuries

Author: Mike Hunt, MD Educational Pearls: Blunt cardiac injuries most commonly occur in motor vehicle collisions, auto-pedestrian collisions, and from sports injuries The more anterior right ventri...

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Podcast # 422: ED Opioid Prescription Trends

Podcast # 422: ED Opioid Prescription Trends

Author: Jared Scott, MD Educational Pearls: From 1996 to 2012, the total quantity of opioids prescribed increased 647% for non-cancer pain Office based prescriptions accounted for 84% of the total ...

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Podcast # 421: Sweet DKA Pearls

Podcast # 421: Sweet DKA Pearls

Author: Gretchen Hinson, MD Educational Pearls:   Diabetic ketoacidosis patients are subject to electrolyte derangements Potassium should be monitored closely: K 3.3 K > 5.3 = delay potassium repl...

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Podcast # 420: CT Contrast and the Kidneys

Podcast # 420: CT Contrast and the Kidneys

Author: Don Stader, MD Educational Pearls: Recent meta-analysis has demonstrated that there is no significant risk for kidney injury from CT contrast Most kidney injury seen after contrast CTs wer...

7 Jan 20192min

Podcast # 419: Etripamil

Podcast # 419: Etripamil

Author: Don Stader, MD Educational Pearls: Etripamil is an intranasal calcium channel blocker in development for use in SVT A recent study showed that etripamil has an SVT conversion rate of arou...

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Podcast # 418: Vertebral Artery Dissection

Podcast # 418: Vertebral Artery Dissection

Author: Don Stader, MD Educational Pearls: Vertebral artery dissection (VAD) contributes to just 2% of strokes overall but ~25% of strokes for patients VAD is associated with minor trauma (chiroprac...

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Podcast # 417: Water Balance

Podcast # 417: Water Balance

Author: Katie Sprinkle, MD Educational Pearls: Hyponatremia results when patients over hydrate and dilute their sodium with too much free water Symptoms of hyponatremia can mimic symptoms of dehydrat...

15 Des 20183min

Podcast # 416: Wide Complex Tachycardia

Podcast # 416: Wide Complex Tachycardia

Author: Aaron Lessen, MD Educational Pearls: Defined as QRS over 120 ms and rate over 120 Two major rhythms = Vetricular tachycardia (VT) or SVT with aberrancy Safest approach is to assume it is VT S...

12 Des 20183min

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