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/

Avsnitt(1145)

Podcast # 350: Pressors and Ischemia

Podcast # 350: Pressors and Ischemia

Author: Nick Hatch, MD. Educational Pearls: A common concern using vasopressors is the risk of digital and mesenteric ischemia. The absolute risk of digital ischemia and/or mesenteric ischemia is...

9 Juli 20183min

Podcast # 349: Fat Emboli

Podcast # 349: Fat Emboli

Author: Sue Chilton, MD Educational Pearls: Triad of fat emboli syndrome is a petechial rash, AMS, and respiratory distress. Petechiae usually start in the axilla. 90% of patients with long bon...

4 Juli 20183min

Podcast # 348: Steakhouse Syndrome

Podcast # 348: Steakhouse Syndrome

Author: Don Stader, MD Educational Pearls: Steakhouse syndrome is an impacted esophageal food bolus. Occurs because they have an esophageal stricture (schatzki ring, scarring, esophagitis). Cla...

2 Juli 20183min

Podcast # 347: Fasting and Procedural Sedation

Podcast # 347: Fasting and Procedural Sedation

Author: Sam Killian, MD Educational Pearls: Recent study examining fasting and adverse events during procedural sedation found no association between fasting duration and any type of adverse event....

29 Juni 20183min

Podcast # 346: Pediatric DKA

Podcast # 346: Pediatric DKA

Author: Chris Holmes, MD Educational Pearls: There is a risk of cerebral edema in pediatrics with DKA if over resuscitated. Recent study comparing normal saline vs. ½ normal saline showed no diff...

27 Juni 20184min

Podcast # 345: Epidural Abscess

Podcast # 345: Epidural Abscess

Author: Sue Chilton, MD Educational Pearls: IV drug use and spinal procedures are major risk factors. Classic triad of back pain, focal neurological deficit and fever. However, presence of fever ...

25 Juni 20184min

Podcast # 344: Foley troubleshooting

Podcast # 344: Foley troubleshooting

Author: Aaron Lessen, MD. Educational Pearls: When foley is stuck, balloon may not have deflated. Make sure balloon is not in the urethra, which can block drainage. Cut off the port as it may b...

22 Juni 20183min

Podcast # 343: Snake Bites

Podcast # 343: Snake Bites

Educational Pearls: Snake bites commonly occur between April and October. Rattlesnake bites are the most common. Venom contains proteins/enzymes that cause local inflammation, coagulopathy, and...

20 Juni 20186min

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