The role of the physician during winch rescues – new data and our simulation experience

In Helicopter Emergency Services (HEMS) around the world, winching to critically ill patients is an important aspect for those in patients otherwise inaccessible by road transport.

Most HEMS services have paramedics as the primary medical responders who are winched to patients, however, in some services physicians who are on-board are also winched resulting in a two clinician operation. For a North American (like myself, Andrew Petrosoniak) this idea of physicians on board the helicopter, nevermind winching to patients is completely foreign! But in HEMS operations around the world, this is a reality.

At ARHT we routinely winch highly trained paramedics to patients but less commonly are physicians required to be winched during a job. However, all our physicians are trained and ready depending on our task assignment. I wrote this post after conducting a recent simulation involving a two-clinician stretcher winch. The simulation was designed after discussion with our paramedics and also review of several recently published articles.

Our two clinicians preparing the patient for a stretcher winch

Our two clinicians preparing the patient for a stretcher winch

The Greater Sydney Area HEMS group, a service with a well-established physician winch program, just published their experience over the past 3 years. They reported 130 missions (8% of total missions) where a physician was winched along with a paramedic. Interestingly, in less than 50% of cases was a physician only intervention performed. Most of these interventions involved the administration of ketamine. If we compare this to our service, our numbers would certainly be different since our paramedics are trained to administer ketamine. Some of the comments & editorials following this publication did focus on this fact. Questions emerged as to the need to winch physicians if most of the requirements involves the administration of ketamine? What could be argued is that frequently involving physicians in winching improves experience levels and potentially reduces risk to the providers – furthermore there could be other important factors for physician presence that I articulate below.

There was a small but important number of other interventions like RSI and orthopedic procedures that required physician expertise. What wasn’t well described was the importance of having two clinicians to treat the patient. In many instances, having two sets of hands and a second set of eyes for patient assessment can be crucial. It’s difficult to formulate any significant conclusions based on this data but it’s important in evaluating the tasking and training necessary to integrate a physician within the winch rescue team.

Stretcher winch simulation in action.

Stretcher winch simulation in action.

This data will be helpful for those services who currently or are planning on integrating physicians within their existing winch system. A second paper, which I won’t review, also reports positive outcomes from their winch rescues involving physicians.  Finally, the Sydney HEMS group must be commended for describing a bag valve mask failure during a job. We should encourage reporting such as this as it contributes to the culture of safety that is vital for helicopter rescue services.

Based on these papers during a winch of an intubated patient, we conducted a simulation of our protocols for winching intubated patients. Several pictures are included below that were taken during the simulation. This exercise was extremely successful as it combined a review of the evidence with a review of our protocols. Implementing in-situ simulation as a training method offers an excellent opportunity to practice high-risk procedures in our own work environment. We were able to evaluate our experience using an evidence-based approach.

A birds eye view of our team preparing our patient for a  stretcher winch

A birds eye view of our team preparing our patient for a stretcher winch

The merits of physician winches during HEMS rescues will be subject to further debate. The data that I outlined above is far from conclusive, however, these publications are important pieces to incorporate into training curricula for other HEMS operations. Our in-situ simulation training is only enhanced by having access to the experiences of others.

 

 

 

 

 

 

 

Ever done an RSI in a helicopter? Here’s a recent simulation experience!

Recently at the base, we’ve been discussing the concept of improving our ergonomics and making our workspace (e.g. the helicopter) as functional as possible. We are continually looking to optimize our equipment to best serve our patients.  Any procedure in-flight will be considerably more difficult than if performed in a well controlled environment like the hospital so in-situ training within the helicopter is essential.

Today, Karl (one of our advanced paramedics) and I did some in-situ simulation of an RSI within the helicopter. We ran through a scenario with an unpredicted deterioration of a patient in flight that required an RSI. A review of the literature provides little guidance on the emergency airway management of patients while in-flight so approaches to such situations currently must be derived from simulation and retrospective reviews within your own program.

We discussed a few key concepts that should be considered as we move forward in pre-hospital airway management and overall care for acutely ill patients:

1. Patient positioning: ample evidence that patient’s should probably have some head elevation if possible during intubation (If you don’t believe me…check out this must read paper). This IS possible within the BK and it actually provided Karl with the best view when it was up near 40-45 degrees! Check out the following pics which demonstrates feasibility within the BK.

Patient is fully supine. Experts advocate "ear to sternal angle" but in our traditional position of supine you'll note that the ear is NOT at the sternal angle!

Patient is fully supine. Experts advocate “ear to sternal angle” but in our traditional position of supine you’ll note that the ear is NOT at the sternal angle!

And now, for a clear demonstration of “ear to sternal angle”. A position we should strive to do either to avert intubation or in preparation of an advanced airway.

A picture perfect view of the cords!

A picture perfect view of the cords! Patient at 40 degrees, and still able to intubate with a great view…even with the helmet on. Let’s integrate this!

2. Pack position: we decided that the airway/BMV pack would be removed from the Thomas pack and given to the intubating clinician immediately upon patient deterioration. This allowed the paramedic to have all necessary equipment for excellent airway management. The physician could then focus on drug administration and clinical decision making. We opened the Thomas pack fully beside the physician and placed the drug pack on the patient’s legs.

Note the drug pack on the patient's legs and the Thomas pack spread out to the right of the physician. This worked best in our setting.

Note the drug pack on the patient’s legs and the Thomas pack spread out to the right of the physician. This worked best in our setting.

Here’s what DIDN’T work.

This set up was very cumbersome if the drug pack is lying on a partially open Thomas pack. Another issue was the Thomas pack was still upright...and not lying flat.

This set up was very cumbersome if the drug pack is lying on a partially open Thomas pack. Another issue was the Thomas pack was still upright…and not lying flat. Also harder since we had to turn each time to get drugs rather than in front.

3. Apneic oxygenation: this is a bit trickier and something we’ll have to look at more closely to see what would be feasible since it will require 2 O2 sources. It was definitely challenging to get it set up when time constrained. (another must read paper on the value of apneic oxygenation).

Huge thanks to Karl for running through the sim case and providing value feedback on the ergonomics of the situation…what worked and what didn’t! We will all learn from this.