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Scenario โ€” Snakebite at outdoor community festival
Patient Information
Dispatch
You are called to a patient (Sarah Nguyen, 35YO female) who is sitting near the bushline at the Mundaring Community Festival. Bystanders report she was walking near the tree line and felt a sharp pain on her right ankle. She is conscious and anxious.
Incident History
Pt was walking along the grassed bushline area of the festival grounds approximately 10 minutes ago when she felt a sudden sharp pain to her right lower leg/ankle. A bystander saw what appeared to be a snake moving away into the brush. Pt has not walked since and is sitting on the ground where she was found.
Emergency Contact
David Nguyen (Husband) 0412 338 774
Response
Alert
Airway
Patent. Nil airway obstruction. Nil swelling or stridor.
Breathing
Adequate. Self-ventilating. RR slightly elevated due to anxiety. Nil audible wheeze or crackles.
Circulation
Radial pulse present, regular, normal rate. Skin warm and dry. Small puncture marks noted to right lateral ankle โ€” nil significant bleeding. Mild localised redness at bite site.
Disability
GCS 15 (E4V5M6). Orientated to time, place and person. Anxious but co-operative.
Exposure
Two small puncture marks visible to right lateral ankle. Mild localised redness. No visible swelling or bruising at this stage. No rash. Rest of limb appears normal.
Vitals
Time SpO2 Resp Dist RR Pulse BP CRT GCS PERL Temp BGL Pain
Initial 98% (RA) Nil 18 96 122/78 <2s 15 4 4 ++ 36.7 โ€“ 3
10 mins 98% (RA) Nil 16 88 118/76 <2s 15 4 4 ++ 36.7 โ€“ 2
History Taking
Signs/Symptoms
Sharp localised pain at right ankle bite site, mild anxiety, nausea. Denies headache, visual disturbance, weakness in limbs, difficulty breathing or swallowing at this stage.
Onset
Approximately 10โ€“12 minutes ago while walking near the tree line.
Pain
Sharp pain at right ankle bite site.
Quality
Localised sharp pain at wound. Nil radiation of pain into limb at this time.
Radiates
Nil at this stage.
Severity
3/10
Allergies
Nil known drug or environmental allergies.
Medications
Oral contraceptive pill only.
Pertinent History
No significant medical history. No previous snakebite. Nil recent illness or injury.
Last Oral Intake
Ate lunch approximately 1 hour ago. Water since then.
Treatment
Bystander told patient not to move. No bandage or tourniquet applied prior to EHS arrival.
Events Leading
Pt was attending the Mundaring Community Festival with her husband and walked to the bushline to take a photo. Felt sudden sharp pain and saw a dark-coloured snake retreat into the scrub. She sat down immediately and called for help.
Scenario Progression and Treatment Objectives

((If trainees allow the patient to walk or stand to reach the stretcher โ€” patient begins to feel lightheaded and nauseous, HR increases to 110. Remind trainees: do NOT walk the patient.))

((If Pressure Immobilisation Technique is not applied within 5 minutes of assessment โ€” patient begins to develop mild tingling in the right calf and reports feeling slightly weak in the leg. Prompt trainee: 'The patient asks if she should have something wrapped around her leg.'))

((If trainees attempt to cut, suck, or wash the bite site โ€” facilitator stops them and asks: 'Is that recommended for snakebite management?'))

((If trainees attempt to apply a tourniquet โ€” facilitator intervenes: 'What is the difference between a tourniquet and the Pressure Immobilisation Technique for snakebite?'))

((If trainees do not immobilise the limb with a splint after PIT โ€” patient moves her foot to 'get comfortable'. Prompt: 'Can you keep the limb as still as possible?'))

((If trainees do not mark the bite site on the bandage โ€” facilitator prompts: 'Is there anything else you should document on the bandage itself?'))

((If patient is not continuously reassured and kept calm โ€” her RR increases to 22 and she becomes more distressed. Remind trainees that anxiety increases lymphatic flow and venom spread.))

This patient is suffering from a suspected snakebite with potential envenomation to the right lower limb. No overt signs of systemic envenomation are present at this time, however all Australian snakebites must be treated as potentially life-threatening until proven otherwise at a medical facility.

  • Ensure scene safety โ€” confirm snake is no longer present and maintain safe perimeter around bushline area.
  • Perform Primary Survey โ€” confirm airway patent, breathing adequate, circulation present, GCS 15.
  • Keep patient completely at rest โ€” do NOT allow patient to walk or stand. Bring equipment and stretcher to patient.
  • Continuously reassure patient to reduce anxiety and minimise lymphatic flow.
  • Apply Pressure Immobilisation Technique (PIT) to right lower limb โ€” commence bandaging from toes/foot distally and extend as far up the limb as possible using snakebite bandage with continuous indicator. Bandage should be firm: unable to easily slide finger beneath, similar tension to bandaging a sprained joint.
  • Mark the bite site location on the outside of the PIT bandage with a pen/marker.
  • Apply splint to right lower limb to further minimise movement.
  • Assess distal neurovascular observations to right foot post-PIT application: capillary refill, colour, warmth, movement and sensation to toes.
  • Conduct full Vital Signs Survey: GCS, SpO2, RR, BP, HR, CRT โ€” monitor closely for respiratory depression.
  • Perform thorough IMISTAMBO history: signs/symptoms, allergies (nil known), medications (OCP), pertinent history (nil), last oral intake, events leading.
  • Do NOT remove PIT bandage or splint prior to hospital arrival.
  • Do NOT attempt to trap, identify, or kill the snake.
  • Do NOT cut, incise, suck, or wash the bite site.
  • Do NOT apply an artery tourniquet (CAT) โ€” PIT is the correct technique for snakebite.
  • Monitor patient persistently โ€” record full observations every 10 minutes, with close attention to any new neurological symptoms (drooping eyelids, difficulty speaking/swallowing, limb weakness, visual disturbance), worsening respiratory effort, or deteriorating GCS.
  • Arrange Priority 1 transport to nearest Emergency Department โ€” pre-notify receiving facility of suspected snakebite with PIT in situ.
  • Facilitate gentle transfer to stretcher without patient weight-bearing โ€” use carry device to bring patient to stretcher.
  • Scenario ends on arrival of ambulance and IMISTAMBO handover.
  • Attention to hand hygiene will be given throughout the scenario.

Clinical references: Snakebite ยท Pressure Immobilisation Technique (P.I.T) ยท Primary Survey