Pulse oximetry measurement and how it can fail.

Sep 2, 2021

Explore the fascinating world of pulse oximetry and its critical role in anaesthesia. Discover how it revolutionized patient monitoring and the common pitfalls, like false low readings from cold extremities. Learn about the Beer-Lambert law and how hemoglobin variants can mislead saturation measurements. Delve into practical tips on alternative probe placements and the impact of nail polish. Plus, hear strategies for ensuring patient safety without a pulse oximeter. An enlightening journey through the complexities of oxygen saturation!

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ANECDOTE

Website Crash Taught Backup Lessons

Lahiru lost access to his website after a webhost was hacked and realized he lacked reliable backups.
He now uses a NAS plus cloud backups and a password manager to secure study material.

ADVICE

Simple Three-Point Backup Strategy

Back up critical study files to at least three locations: local device, cloud (e.g., Dropbox), and an external drive.
Use routine syncing and occasional manual backups to prevent catastrophic data loss.

ADVICE

Minimize Common Interference Sources

Reduce motion, optical and electrical interference to improve SpO2 reliability: cover the probe and move it away from diathermy.
If diathermy causes high-frequency artifact, reposition probe or pause cautery to regain a reading.

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In this episode Dr Stan takes us through the ins and outs of oxygen saturation measurement with pulse oximetry and how it can fail.

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Disclaimer:

The information contained in this podcast is for medical practitioner education only. It is not and will not be relevant for the general public.

This contains general information about medical conditions and treatments. The information is not advice and should not be treated as such.

The medical information is provided “as is” without any representations or warranties, express or implied.

The presenter makes no representations or warranties in relation to the medical information on this episode.

You must not rely on the information as an alternative to assessing and managing your patient with your treating team and consultant.

You should seek your own advice from your medical practitioner in relation to any of the topics discussed in this episode’

Medical information can change rapidly, and the author/s make all reasonable attempts to provide accurate information at the time of filming. There is no guarantee that the information will be accurate at the time of viewing

The information provided is within the scope of a specialist anaesthetist (FANZCA) working in Australia.

The information presented here does not represent the views of any hospital or ANZCA.

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