Build Your Own Escharotomy Man!

To make your own escharotomy training model, you will need:

1. A thick foam yoga mat (red or pink). This one was $10 from K-Mart.

Yoga Mat

2. A roll of Cling Film (Glad Wrap). Glad wrap

3. A roll of thin packing foam — the sort of stuff your new TV comes wrapped in.

Foam padding

4. Some elastic bands.

Elastic Bands

5. Around 4-5 rolls of white Cloth Tape (similar to Gaffer tape but much cheaper).

Cloth tape

6. A pair of trauma shears

trauma shears

7. A resuscitation mannequin.

mannequins

 

Assembly Instructions

1. Cut the yoga mat into sections and wrap circumferentially around the torso and limbs of your mannequin. Wrap cling film firmly over the top to secure it in place. This red/pink layer represents the viable tissue beneath the eschar — i.e. the end-point of the escharotomy procedure.

red layer 1 red layer 2

2. Next, simulate subcutaneous tissue by adding 2-3 circumferential layers of packing foam to the torso and limbs. Elastic bands can be applied to the limbs to simulate constrictor bands.

fatty layer

3. Now for the most important part! Wrap white cloth tape circumferentially around the limbs and torso to simulate  eschar.

Wrapping 1

The tighter you can apply this layer, the better! The springy foam layers are now compressed by the restrictive tape and will spring apart when incised.

wrapping 2 wrapped

4. Your escharotomy man is now ready to use! For additional realism you can apply make-up or charcoal to simulate charring, or even lightly burn the top layer to produce an unpleasant burned smell.

burned man

5. The mannequin can now be used for simulation or practical skills teaching.

Tutees can be instructed to:

  • Draw their proposed escharotomy lines on the mannequin with a marker pen (e.g. Sharpie) to assess knowledge of correct escharotomy sites.
  • Cut with a scalpel down to viable tissue (the red / pink layer). The incision should spring open once the eschar is divided.
  • Run their fingers along the length of the wound to detect and individually divide any constrictor bands.
  • Dress the wounds (e.g. with cling film) post escharotomy.
escharotomy

Escharotomy Incision Sites

This model was trialled for the first time at our Sydney HEMS team induction and performed very well!

2014-08-06 16.02.26

2014-08-06 16.00.47

Of course, in real life the procedure is a little bloodier…

 

If anybody has a clever way to simulate active bleeding without completely destroying the mannequin then please let me know!

Escharotomy Man designed by Dr Ed Burns. Thanks to Dr Fergal McCourt for the escharotomy video. 

Further Reading

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CGD Flyer – Weds 27th August 2014

Here is the flyer for next week’s Clinical Governance Day. 

CGD Flyer (1)

Please note that as the training building is currently being refurbished, the CGD will instead be held in the conference room in the main office building (“The Castle”). 

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Is lamotrigine ketamine’s black swan?

black-swan-8288_1920.jpgThe black swan theory describes rare events beyond the realm of normal expectation. We use ketamine on a daily basis, but are there any circumstances in which ketamine simply will NOT work?

This interesting case report by an Ex-Sydney HEMS physician Daniel Kornhall describes how ketamine failed completely as an anaesthetic agent in a psychiatric patient with a toxic lamotrigine overdose.

***SCIENCE ALERT***

Lamotrigine, as we all obviously know, exerts its antiepileptic effect by inhibiting presynaptic sodium channels thus reducing the release of the excitatory glutamate and stabilising excitable neuronal membranes. Ketamine’s dissociative anaesthetic effects are a bit more of a mystery and diverse, but they are thought to involve increasing glutamate release through non-NMDA receptor pathways. It therefore follows, that if one drug prevents the release of glutamate and second drugs effects depend on its release, the second drug will not work.

With our high volume of ketamine use, incidents such as this are worth bearing in mind the next time you see a patient with a mixed polypharmacy overdose.

Lamotrigine is therefore ketamine’s black swan.


Kornhall D, Nielsen EW. Failure of ketamine anesthesia in a patient with lamotrigine overdose. Case Rep Crit Care. 2014;2014:916360. Full Text Article

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Selective Aortic Arch Perfusion

Fascinating talk on the development of this resuscitative technology by Dr Jim Manning who appeared in person at our Clinical Governance Day.

 

For further information check out EMCrit Podcast Episode 123

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Developing EM in Brazil is coming soon

DevEM2014
Several of our consultants are presenting at the Developing EM conference in Brazil.  If you’d like to hear more, organising emergency physicians and prehospital & retrieval medicine consultants Mark Newcombe and Lee Fineberg describe it and also discuss the highly successful Developing EM conference they ran last year in Cuba:

 

Check out the program and register here

 

The project is a not-for-profit venture and no SydneyHEMS specialist receives financial remuneration for involvement in the DevelopingEM conference.

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Clinical Governance Day 30th July 2014

 
CGD Flyer (5)
 

See here for directions

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Cognition and Decision Making Under Stress

MichaelLauriaDon’t train and prepare until you get it right. Train and prepare until you can’t get it wrong.”

Sydney HEMS is proud to be given permission to share Michael Lauria‘s talk on Cognition and Decision Making Under Stress. Training in medicine and working as a flight paramedic with the Dartmouth-Hitchcock Advanced Response Team, Michael has extensive military combat experience with special forces and is ideally placed to share thoughts and experience on how to prepare for and execute challenging missions.

His five take home points are:

  1. Take a load off
  2. Rally up
  3. Build power
  4. Inoculate for stress
  5. Stay flexible


 

You can download the audio file by right-clicking here

 

If you’d like to see the accompanying slides the talk can be viewed on YouTube

Audio made available thanks to our mate EMCrit

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Extreme Medicine: Everest ER

One of our own Sydney HEMS physicians is an extreme environment and mountain medicine expert – Dr Yashvi Wilamasena. Yash, as he is known to his mates, plans to reach the summit of Everest in the near future. In preparation for this he was there earlier this year. It was, of course, a fateful climbing season when an avalanche claimed the lives of 16 and severely injured 9. Whilst working in the Everest Basecamp ER, Yash, along with Sydney HEMS colleague Dr Jan Trojanowski recorded a series of videocasts that take us through the significant challenges of emergency medicine at 5,000 metres. Here’s the first:

Check out the inspiring Adventure Medic site for more sharp-end-of-the-sharp-end-of-medicine stuff, and where you’ll be able to view the remainder of the Extreme Medicine episodes as they’re published

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Escharotomy Model Mk II

Inspired by Roger Harris and Craig Hore’s escharotomy training video, we have created our own escharotomy model for HEMS physician training.

Our model is based on Roger Harris’ original design with a few minor modifications. With the exception of the arterial line pressure bag, all items were sourced from Bunnings hardware store and the local supermarket. The whole thing takes about five minutes to assemble.

Ingredients:

  • Bone: 4-inch diameter PVC pipe, cut with a hacksaw blade into 50 cm lengths.
  • Muscle: A very cheap cut of steak or chicken breast.
  • Deep fascia: Gladwrap reinforced with a layer of silver duct tape.
  • Subcutaneous fat: 6-8 sheets of thin packing foam (the sort of thing your new TV comes wrapped in).
  • Skin / eschar: White Gaffer tape.
  • An arterial line pressure bag is used to simulate tense, oedematous soft tissues.

Fig 1 – Arterial line pressure bag and PVC pipe

Step 1

Fig 2 – Glad-wrapped piece of meat to simulate muscle

Fig 2

 

Step 1

Wrap the arterial line pressure bag around the length of PVC pipe.

Fig 3

Step 2

Wrap a layer of Glad Wrap around the pipe. This will protect it from being contaminated by the overlying meat layer.

fig 4

Step 3

Using Glad Wrap, bind the “muscle” onto the pipe, ensuring that it lies directly on top of the pressure bag.

fig 5

Step 4

Secure the meat with circumferential straps of silver duct tape.

fig 6

Step 5

Add a longitudinal layer of silver duct tape to simulate the deep fascia.

fig 7

Step 6

Fold the foam packing material around 6-8 sheets thick and apply on top of the deep fascia layer to simulate subcutaneous fat.

fig 8

Step 7 

Secure the foam using the white Gaffer tape, which doubles up as the skin / eschar layer.

fig 9

In this case, a hollowed-out glove box has been used as a base for the model. For greater realism, the limb could be attached to a mannequin.

Step 8

Pump up the pressure bag. This simulates tense oedematous soft tissues and will cause the skin layer to spring apart with a “pop” when incised.

Step 9 

Cut the skin!

fig 10

Step 10

Skin layer can be repaired for re-use by applying additional layers of white Gaffer tape.

 

If anybody has any bright ideas on how to replace the meat layer with something less organic, please comment below!

Escharotomy model MK II designed by Ed Burns, Craig Hore and Cliff Reid based on original design by Roger Harris. 

Links

Chris Nickson’s guide to escharotomy from LITFL

Craig Hore explains escharotomy

 

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CGD 16th July 2014. Everything Sim.

Written by Phil Webster. Posted by Kariem.

EverythingSIMA decade ago simulation was a small part of the learning sphere but in the modern day of medical education it is now becoming commonplace and a somewhat essential part of training. With its embrace, particularly in the field of critical care, comes the evolution of the equipment, science and methodology.

We had the good fortune of having the SiLECT team from Westmead starring Andrew Coggins and Mahesh together with GSA-HEMS’ own sim guru Clare Richmond, providing us with some pearls in how to run simulation and most importantly how to use the de-brief to learn and enquire. Continue reading

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