Tag Archives: ergonomics
Usability testing of new Auckland HEMS packs
By Dr Chris Denny, Auckland HEMS Medical Director
In the early days of Auckland HEMS, we loosely ‘bolted on’ our equipment to the existing paramedic gear. As time passed and we forged a strong collaborative relationship with our paramedic colleagues, the performance gap in our gear required a solution. One year ago we held an ‘Ergonomic Equipment Exercise’, led by Dr. Samantha Bendall (on sabbatical from Sydney, NSW). From this evening of pack testing we learned to focus on integration. Several design concepts guided our work:
We are very keen to learn from the HEMS community. What are other services using? What works? What is the future of PHARM medical equipment going to look like?
The importance of simulation in usability testing and hazard identification
Auckland ED is conducting a lot of simulation training currently, with a recent focus on airway management.
Last week a teaching session was delivered by Sam Bendall (an Auckland HEMS doctor) on ‘intubation as a team sport’, which covered human factors in ED airway management and included the use of adjuncts like airway checklists. While Auckland HEMS has an RSI checklist, a similar tool has not been finalized for Auckland ED – this is under consideration currently. Following that teaching session, several airway checklists had nonetheless made their way into our resuscitation areas.
High-fidelity simulation training took place this afternoon, led by Sam, Mike Nicholls (another HEMS doctor), and Nancy Mitchell (Nurse Educator).
The first scenario involved a relatively junior team undertaking an emergent RSI. They performed admirably, and the outcome in practice would have been safe and successful. As an observer however, it was apparent that an airway checklist would have contributed to their confidence and comfort levels. (My personal opinion is that we should start using a checklist for ALL ED RSIs, independent of team seniority)
While watching the simulation I spotted a checklist taped to a whiteboard on a side wall. I assumed that was the airway checklist, and thought ‘that’s a clever position – it means the airway assistant can read out the checklist immediately prior to the RSI. They haven’t used it, I must bring this up at the debrief’.
At the end of the debrief, I inspected what I thought was the airway checklist, and found this:
It wasn’t an airway checklist at all, but a restocking checklist!
The actual airway checklist was here…
… taped to the top of the airway trolley (logical) but unfortunately covered up by the airway tray, which is removed from the trolley and placed on top when setting up for airway management. This is a good example of a latent hazard.
I found a second copy of the checklist taped to the desk at the entrance to the resus bay – this is where the scribe (usually one of the senior nurses) stays during a resuscitation:
Although this desk is frequently cluttered with paperwork during a resuscitation, accessing the checklist would be a simple matter, and would be done so by a senior person.
After looking at the positioning of these checklists, I came to two conclusions:
1) Simulation is a powerful tool for testing the usability of a new item or technique and identifying hazards
When considering logistics/ergonomics/equipment what actually happens in real life may differ from what we envisage mentally when we introduce something new. Simulation introduces stress, time-urgency, ergonomic elements and personnel elements that can rapidly reveal whether something new is going to be useful or not, or whether its introduction has inadvertently created hazards
2) We need to actively manage the environment we work in
When confronted with a critically ill patient, it is easy to focus on the scenario in front of us (there is usually quite enough to think about there!) and accept the physical environment as it is. By going a step further and ACTIVELY managing our environment to improve logistics and ergonomics we can increase our chances of a good outcome. This can occur both BEFORE we are confronted with a patient (eliminating the latent hazard above, for example) and DURING a resuscitation. This is particularly important in the pre-hospital setting, where both the relatively unforgiving helicopter and roadside environment provide a range of challenges not encountered in a resuscitation bay. As doctors I believe we have a lot to learn from our paramedic colleages in this area.
(NB – if someone becomes angry because that restocking checklist mysteriously disappears this week, I had NOTHING to do with it, nothing at all)
Case Based Learning in the New Year: pneumothorax & lung ultrasound
Last week we ran another case-based learning session. The session consisted of a short discussion based around a case that we were tasked that involved a patient with a suspected pneumothorax.
We discussed the issues and challenges of managing a patient on the ground and in-flight with a pneumothorax. In addition, we discussed then practiced how we can use ultrasound as an added tool in the diagnosis of a pneumothorax in the prehospital setting.
To briefly summarize, I’ve divided up some discussion points
- Both paramedics and doctors discussed the most important aspect in the patient with a pneumothorax in the pre-hospital setting was the clinical status
- The ultrasound was noted to be extremely helpful for diagnosis however, presence of pneumothorax didn’t necessarily warrant intervention
- Clinical condition was the overwhelming driver for intervention. The question arose regarding the role of ultrasound – “if the presence of pneumothorax did not necessarily mean intervention required, why use it?” In general, clinicians felt that knowledge about the condition would help make subsequent decisions in the case of deterioration
- One theoretical approach was proposed – in a patient with pneumothorax that was reasonably stable, consider anesthesitizing & exposing the site for a chest drain then proceed with finger thoracostomy if deterioration. Several clinicians felt that it there was such concern to proceed with local anesthesia then probably a drain should just be placed.
- In the patient with a left sided pneumothorax, there was strong agreement that loading the patient feet first such that the clinicians would have access to the left side (of our typically starboard loaded patient)
- The likelihood of needle decompression success is only 50% – brief discussion about an anterior approach vs. a lateral approach
- Knowledge regarding pneumothorax is key depending on the location of the patient. In situations on the east coast of the Coromandel then altitude becomes extremely important.
- The early rule out diagnosis that the ultrasound can provide is very useful for managing flight plans
- Weather was decided as a key factor that would alter management and it would impact possibly both medical decision making and flight operations
- Placement of ultrasound in the machine: crewman/paramedic at the head of patient holding the machine with doctor on the patient’s right side
- Overall based on our evaluations of the process, it was a successful event with more case-based learning sessions planned
- Clinicians reluctant to intervene for pre-hospital pneumothorax unless unstable
- Strong communication among the team about the presence of a pneumothorax is essential and ultrasound greatly aids with this – affects both medical & operational decision making
- Ergonomics are important but dependent on each setting; however a standard approach in the machine might be appropriate for positioning of the ultrasound