FOAMfrat Podcast

We've been exposed to gas laws our whole life, and we have intuition about what will happen to gas under certain conditions. For example, people notice that the pressure in their tires might become low on a very cold day. Or perhaps you've been at very high altitudes and you've been short of breath. And everyone knows that if you shake a carbonated beverage before opening it you'll be cleaning up a mess very shortly. Each of these observations has been classified into the laws, and we'll be splitting them up between this blog and the next. Stating the laws is one thing - anyone with google can copy and paste their definitions. However, we have a special interest in these laws as medical professionals because we deal with them on a different level. Sometimes we're manipulating these gas laws on purpose, and other times we're dealing with their side effects. Or perhaps we're just trying to pass our FP-C, CCP-C, or CFRN exam ;)       Let's dive (pun intended) right in!

The concept of taking blood out of the body, oxygenating it, removing the CO2, and then putting back in, fascinates me. A few years ago I admittedly knew very little about extracorporeal membrane oxygenation (ECMO) and its indications. I remember going to a class on ECMO at Life Link III and having questions like:   Are we actually pumping blood backward through the body?   What happens to the blood in the heart when using ECMO in cardiac arrest (ECPR)?   What kind of vent settings should I use?   I am by no means an expert on ECMO, in fact, I have only been on a handful of ECMO transports, but the concept fascinates me and I thought a blog breaking down a few concepts of ECMO physiology would be beneficial.

Before the July 4th weekend hits, I wanted to address two main questions whose answers may come in handy on a call you'll run very soon... Should EMS use a burn formula? What's the best way to manage pain for the burn patient? For a sense of a well-rounded blog on burns, I've included some quick facts about burn care at the end that are unrelated to these questions. Also, Erik Rima (CFRN and former burn center RN) left us his perspective at the end in a peer review. Be sure to check those out before you leave! Alright, on to question number one... should EMS even bother with a burn formula?

Invasive arterial blood pressure (IABP) monitoring techniques have enjoyed a rich history of use throughout the mid-to-late 20th century in the peri-operative setting and are now a standard of care intensive care units. While there are a variety of IABP monitoring options, one of the most common techniques is percutaneous radial arterial catheterization. Although monitoring of radial arterial lines is a widely accepted skill in the critical care transport (CCT) world, placement by CCT providers is less common. Concerns over safety and logistical management have contributed to the perceived difficulty in arterial lines; however, this article aims to demonstrate that arterial lines can be placed safely and effectively in the pre-hospital setting.   www.foamfrat.com

Ok, here's the thing.. there really is no anion gap. We pretend there is because the things we routinely measure leave something to be desired on the anion side. Sam put out a killer blog and this is a follow-up conversation. Enjoy!

Traditionally transcutaneous pacing involves a paramedic placing pads anterior/posterior (preferred), and turning up the milliamps until electrical capture is obtained. Electrical capture is obtained when a pacing spike is followed by a wide complex. The clinician will then try to palpate a pulse to confirm mechanical capture. Because the contractions of the pectoral muscles can tug on the muscles of the neck as well, AHA recommends palpating a femoral pulse versus a carotid (3) to avoid thinking you feel a pulse (false mechanical capture). Not only are events of false capture common, but there are even situations in which the paramedic swears they feel a pulse and observes the patient becoming more alert, and they never had mechanical capture. I believe most of us are using SPO2 pleth wave to confirm mechanical capture versus the subjectivity of palpating a pulse, but even patients with a pulse can have poor pleth wave readings. I believe ultrasound-guided pacing is ideal and should become mainstream. I typically find I can get a parasternal long view on ultrasound with the pads placed as illustrated below. However, there are other views if your pad sweet spot is obstructing where you wanna put the probe. This is nothing profound and is definitely not a new concept in emergency medicine. It is however a new concept for paramedics and another feather in the cap of prehospital ultrasound. This is a conversation between myself and Dr. Eydelman discussing this topic. Enjoy!

A few months ago Sam published a blog on the oxyhemoglobin dissociation curve. If you haven't checked it out I highly recommend reading that before listening to us discuss what this curve teaches us about airway management.

My buddy Bryan Winchell and I sit down and record a conversation about PEEP. We have way more questions than answers, but here's some shop talk on what we are currently doing to optimize PEEP. Check out the full blog and show notes at FOAMfrat.com

If I give this patient a fluid bolus, will it increase cardiac output? What does wall tension have to do with myocardial oxygen demand? In this episode, we will give you a step-by-step guide into assessing LV function utilizing pulse pressure and ultrasound. FOAMfrat is an online library for EMS professionals who are looking to take their knowledge and skills to the next level. www.foamfrat.com

Anne keeps asking "is my baby ok?!" There may be some momentum to just break out the ultrasound and look for a fetal heart rate right now, but you know that taking care of mom means taking care of the baby. In this episode, Cynthia and I discuss the prehospital fetal assessment and how to communicate with mom what you see.   www.foamfrat.com