 A-a gradient, a/A ratio, and P: F ratio - are all different views of the same item. These formulas do not have a complete view of oxygenation. Oxygenation is a huge topic, and there are more common values that we use:   How well is the patient saturating?   Is there dyspnea?   How do the lungs sound (auscultation) or look (POCUS)?   Where is the patient on the OHCD?   What does the ABG show?  

Podcast 149 -  P:F vs. A-a & Oxygenation Strategies

Prehospital emergency and critical care podcast by Tyler Christifulli & Sam Ireland

Medicine

Science & Medicine

Health & Fitness

 Alaina Martini, a flight nurse at Allegheny Life Flight, shares her expertise on transporting patients with external ventricular drains (EVDs). She explains the indications for EVD insertion, such as aneurysmal subarachnoid hemorrhage and obstructive hydrocephalus. Alaina discusses the importance of assessing the color and texture of the cerebrospinal fluid (CSF) to detect changes and potential rebleeding. She also explains the process of inserting the EVD and how it is guided by CT scans to avoid damaging important brain tissue. Alaina emphasizes the need to know if the aneurysm is secure before adjusting the EVD drain level, as opening it too low can increase the risk of rebleeding. She also discusses the use of hypertonic saline and osmotic therapy to manage increased intracranial pressure. Tyler and Alaina discuss various aspects of managing patients with external ventricular drains (EVDs) during transport in this conversation. They cover topics such as the clamping of EVDs, positioning the patient's head, troubleshooting common issues, and securing the EVD during transport. Alaina provides insights and recommendations based on her experience as a neurocritical care nurse.

Podcast 169 - EVD Transport Logistics w/ Alaina Martini

Dr. John Aho discusses needle decompression and the procedure's indications, techniques, and potential pitfalls. He emphasizes the importance of high clinical suspicion and the limitations of external signs in diagnosing tension pneumothorax. The conversation also covers the choice of needle insertion sites, the use of ultrasound, and the need for proper training and practice.  Dr. Aho provides insights into the anatomical considerations and common mistakes made during needle decompression. He also explores the possibility of instant feedback to confirm successful decompression. The conversation discusses the problem of needle decompression failure rates and the need for a reliable indicator of successful decompression.  The guest introduced the Cap-No-Spot, a device that uses colorimetric indicator paper to detect CO2 and determine if a needle decompression procedure was successful. The device has been shown to have higher sensitivity and specificity than human judgment. The conversation also touches on the importance of proper training and the device's potential applications beyond pneumothorax detection.

Podcast 168 - Procedure Preppers (Needle Decompression) w/ Dr. Aho

An iceberg typically shows only 10% of its mass above water. To appreciate the other 90%, you need to dive deep. That’s precisely what we’re doing in this series—discovering the deeper knowledge about obstetric topics. These topics can be massive, and much of the information is below the ‘surface-level’ knowledge that EMS is presented with.  In this episode, Demi Wilkes & I will discuss Placenta Previa and the closely associated Placenta Accrete Spectrum.

Podcast 167 - Placenta Previa w- Demi Wilkes

The conversation is about a paper on false electrical capture and pre-hospital transcutaneous pacing by paramedics. The guests, Tom Boutilet, Josh Kimbrell, and Judah Kreinbrook, discuss their research findings and the implications for paramedics. They conducted a retrospective study and found that paramedics often mistakenly believe they have electrical capture when they do not. They emphasize the importance of confirming electrical capture before assuming mechanical capture. They also discuss the challenges of pulse palpation and the need for more rigorous research in EMS and ED settings. The conversation discusses the challenges and considerations in transcutaneous pacing, specifically focusing on the verification of mechanical capture. The speakers explore the use of various methods to confirm mechanical capture, such as feeling for a pulse, using pulse oximetry, and utilizing ultrasound. They also discuss the difficulty of accurately assessing mechanical capture and the potential for false electrical capture. The conversation concludes with a discussion on the transfer of pacing from one device to another and the importance of verifying capture during the process.

Podcast  166 - Transcutaneous Pacing & False Capture

In this episode we discuss whether the concept of having a "max dose" of your pressor has any evidence or physiological backing. Joining me in this discussion are Dan Rauh, Shane O'Donnell, and Shad Ruby.  

Podcast 149 - P:F vs. A-a & Oxygenation Strategies

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