Caleb Pearson, a 17-year-old with undiagnosed Type 1 diabetes, presented with pharyngitis and was diagnosed and treated for a throat infection by his GP on 25 May 2015. Over the following two days he deteriorated with vomiting, lethargy and inability to move. Paramedics attended on 27 May evening and found him with tachycardia (120 bpm), tachypnoea (40 bpm), hypothermia and signs of dehydration, but attributed his presentation to anxiety and upper respiratory infection. They did not take a blood glucose level or transport him to hospital. He died from diabetic ketoacidosis (DKA) six hours later. The coroner found his death was preventable: the significantly abnormal respiratory rate alone warranted hospital transfer for investigation. Paramedics failed to recognise the constellation of vital sign abnormalities as indicative of serious illness, were influenced by cognitive bias from the recent GP diagnosis, and did not perform basic investigations like blood glucose testing that might have identified DKA.
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Paramedics failed to recognise the significance of multiple abnormal vital signs (tachycardia, tachypnoea, hypothermia, signs of dehydration)
Paramedics did not perform blood glucose testing despite undifferentiated illness presentation
Misdiagnosis of anxiety and hyperventilation syndrome without adequate differential diagnosis
Cognitive bias from recent GP diagnosis of pharyngitis
Paramedics' limited training in recognition of undifferentiated illness and occult diagnoses
Inadequate assessment to confirm or exclude proposed diagnoses
Failure to recognise that persistent abnormal respiratory rate (24-40 bpm) warranted hospital transfer
NHDS triage operator failed to recognise gravity of symptoms (rapid breathing, altered responsiveness) and did not advise caller to contact 000
NHDS operator failed to document all reported symptoms and apparently ignored or missed the altered respiratory rate report
Delayed dispatch of NHDS doctor (dispatched around 3am rather than immediately)
Undiagnosed Type 1 diabetes mellitus
Coroner's recommendations
Ambulance Victoria should consider changing their Clinical Practice Guidelines to require paramedics to measure blood glucose level of any patient presenting as acutely unwell, particularly in the setting of undifferentiated illness
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