Emergency Medical Minute13 Sep 2022

Podcast 813: Pulse Oximetry

Contributor: Travis Barlock, MD

Educational Pearls:

Most oxygen in the body is bound to hemoglobin, forming oxyhemoglobin. Less than 1% of the oxygen in the body is dissolved in plasma.
Pulse Oximeters (Pulse Ox) function by emitting wavelengths of light from one side, and capturing the amount absorbed on the opposite side. A calculation determined the amount of saturation.
Pulse Ox relies on pulsations in arterial flow to create a photoplethysmogram (pleth) for measurements
- Patients with poor peripheral perfusion may have unreliable pulse ox.
- Patient with an LVAD have constant flow and also unreliable pulse ox.
Pulse Ox is a useful tool when pacing to determine mechanical capture. If there is disparity between the electrical wave pulse and the rate on pulse ox, there is likely no mechanical capture leading to poor distal flow.

References

Eecen CMW, Kooter AJJ. Pulsoximeters: werking, valkuilen en praktische tips [Pulse oximetry: principles, limitations and practical applications]. Ned Tijdschr Geneeskd. 2021;165:D5891. Published 2021 May 11.

Elgendi M. On the analysis of fingertip photoplethysmogram signals. Curr Cardiol Rev. 2012;8(1):14-25. doi:10.2174/157340312801215782

Summarized by Kirsten Hughes, MS4 | Edited by John Spartz MD & Erik Verzemnieks, MD

The Emergency Medical Minute is excited to announce that we are now offering AMA PRA Category 1 credits™ via online course modules. To access these and for more information, visit our website at https://emergencymedicalminute.org/cme-courses/ and create an account.

Donate to EMM today!

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(1160)

Podcast 1007: Caffeine Pharmacology

Contributor: Travis Barlock, MD Educational Pearls: Caffeine Geography and Types: Caffeine is found throughout the world and has evolved independently in various plants that are not evolutionarily...

25 Maj 4min

Podcast 1006: Cannabinoid Pharmacology

Contributor: Travis Barlock, MD Educational Pearls: Endocannabinoid System: THC binds CB1 and CB2 receptors in neurons and immune cells Δ9-Tetrahydrocannabinol (THC) is the main psychoactive compo...

18 Maj 5min

Podcast 1005: Balanced Fluid vs Normal Saline in Pediatric Patients

Contributor: Aaron Lessen, MD Educational Pearls: There has long been many questions about which IV fluid is best for ED resuscitation Multiple adult studies have shown no clear benefit of balance...

11 Maj 2min

Carepoint Journal Club: Occlusion Myocardial Infarction

Carepoint Journal Club is a quarterly series with discussions about a medical topic, brought to you by Carepoint's Emergency Physicians.

7 Maj 25min

Podcast 1004: Sinus Arrest Post TAVR

Contributor: Taylor Lynch, MD Educational Pearls: Conduction abnormalities are a common and clinically significant complication in patients who undergo transcatheter aortic valve replacement (TAVR)...

4 Maj 4min

Podcast 1003: Nasal Intubation

Contributor: Alec Coston, MD Educational Pearls: What are nasal intubations and when do we use them? Nasal intubations function similarly to oral intubations with the end goal of passing an endotrac...

27 Apr 9min

Podcast 1002: Elder Agitation

Contributor: Aaron Lessen, MD Educational Pearls: What are the common causes of agitation in the elderly? Baseline dementia causing a behavioral disturbance Delirium precipitated by an acute medical ...

20 Apr 3min

Podcast 1001: Acute Intermediate Risk Pulmonary Embolism

Contributor: Aaron Lessen, MD Educational Pearls: Patients with pulmonary embolism (PE) are divided into three risk categories Low risk (non-massive PE): patients are stable Treatment: prescribe an...

13 Apr 3min