Personal Ultrasound

Saw this on Twitter yesterday:

Butterlfy iQ – Personal Ultrasound

This is a compact ultrasound device that connects to a phone (or a tablet, I’m assuming) to provide a portable point-of-care ultrasound solution. The probe (there’s only one option, and it covers most POCUS bases) uses advanced technology to get the size down and enough battery life for a full shift. The software looks amazing—making full use of a touch screen to make depth and gain adjustments intutive. It also includes a secure cloud solution to store files and to send imaging as secure, HIPAA-compliant messages. All for under $2,000—which for ultrasound devices, is a great price.

 

POCUS evangelists have been preaching that the stethoscope is doomed and pocket ultrasound will replace it. This device really shows that potential. Still priced out of reach of paramedics, but definitely moving our way fast. Give it another ten years, and  chances are pretty good that ultrasound will be as much an EMS standard of care as waveform capnography and 12-lead ECGs, while your cutting edge paramedics (the ones carrying the electronic/Bluetooth Littmans now) well have one of these in their pockets. Or bat belt.

Outcome vs. Input Thinking

What makes an excellent clinician so good?

How do “rockstar” paramedics make resuscitating crashing patients look so easy?

As a paramedic educator, I spend a lot of time pondering these questions and looking for the “magic bullet” answers. We are gearing up for our paramedic course starting next month, and I was talking with our senior educator, Rob Atripaldi, about curriculum design differences for psychomotor versus cognitive knowledge domains. Rob had an epiphany—he identified that a key difference between the master paramedic and the typical paramedic was a difference of approach.

The master paramedic approaches resuscitation situations by identifying what outcome they want to see, while the typical paramedic instead starts by deciding what treatments are indicated.

Here’s an example: You respond to a 67-year-old female patient experiencing a severe COPD exacerbation. She’s been struggling to breathe and using her rescue inhaler for the past two hours, but her energy is just about gone, and she tells you, 1–2 words at a time, that she cannot breathe. Your initial assessment is not great—her airway looks good, Mallampati of +3, but her breathing is rapid, shallow, with severe wheezing in upper lobes and diminished breath sounds in lower lobes. Her vital signs don’t look too hot either: HR 122, RR 28, BP 160/80, SpO2 72% on room air, ETCO2 581.

Any competent paramedic is going to pretty quickly recognize that this is a sick patient who needs immediate treatment. The typical paramedic is going to begin thinking about the skills or interventions indicated for this patient—maybe thinking “Albuterol, Combivent, Solu-medrol…” and of course Oxygen, IV, 12-lead, monitor. As the patient continues to deteriorate, the medic may then start thinking about RSI and prepare to intubate.

The master paramedic is going to think differently, working backward from the desired outcome. She’s going to start by framing this respiratory failure patient as a ventilation problem leading to an oxygenation problem. The oxygenation problem can be temporarily patched by increasing FiO2 using an oxygen mask; her assessment will lead her to identify the causes of the ventilation problem—probably bronchoconstriction with or without excess mucus production2.

Next, she will choose the optimal tools to resolve the bronchoconstriction. Perhaps this will involve inhaled beta-agonists, maybe pressure-support from CPAP—the point is that she is picking tools not by matching their indications to the patient’s current condition but instead by matching their effects to the problems she is trying to fix. The master paramedic has a clear vision of the outcome she is aiming for, identifies the pathophysiologic issues keeping the patient from that outcome, and then picks the best tools to fix those problems.

In most cases, these two approaches produce similar treatment plans and similar results. However, in the critical patient with unexpected complications, an outcome focus better equips the clinician to react appropriately. A skills or treatment indication focus sets the paramedic up to fixate on the treatment, not on the result. This anchoring can lead the paramedic to ignore changes in patient status or fail to recognise treatment failures.

A prime example is in airway management: Let’s say that the patient above continues to decline, despite our intervention. Having passed the point of respiratory failure, she now begins to lose consciousness, and her breathing starts to slow. Recognizing this, our typical paramedic sets up for RSI, pushes the medication, and inserts a laryngoscope. The patient’s airway is challenging, but no worries—our paramedic has practiced intubation every morning at his station and is confident he can get the tube. However, after two attempts, the patient’s SpO2 is hovering in the 80s, her heart rate has begun slowing, and the paramedic can’t seem to get the equipment to cooperate. Anchoring leads the paramedic—and in fact, the entire team—to fixate on “getting the tube,” and they keep trying different tricks until finally, they use a bougie and a video laryngoscope to place an ET tube successfully. Just in time, in fact, because when they look up at the monitor they see V-Fib, and a quick pulse check reveals the patient has coded.

Now, this is not a typical case, but it is a typical response to an unexpected complication. The literature describes these types of scenarios and my personal experience reviewing hundreds of RSIs confirms it. Anchoring is dangerous—potentially fatal when performing RSI.

The outcome-focused paramedic is not immune to these biases, but a little more protected. She fixates on the desired outcome, which fundamentally is a patient with a patent and protected airway, adequate ventilation, adequate oxygenation, and adequate perfusion. When the patient begins to decline, our paramedic recognizes that the priority problem is now airway protection, and she can start picking treatments based on that goal. Her initial treatment choices might be the same as above, but being outcome-focused would predispose her to abandon futile intubation attempts when they are not getting her any closer to her outcome goal.

So how do you teach an outcome-focused approach, especially when paramedic curriculum is overwhelmingly skills-driven?

Stay tuned—some ideas for that are coming.