respiratory depression caused by morphine intoxication on a background of upper airways narrowing as a consequence of infectious mononucleosis
AI-generated summary
A 29-year-old woman with infectious mononucleosis and severe sore throat died from respiratory depression caused by morphine intoxication with concurrent upper airway narrowing. A GP administered 30mg intramuscular morphine twice within 12 hours (2 doses totalling 60mg) based on an outdated weight-based dosing calculation rather than the recommended age-based approach (7.5-15mg for a 29-year-old). The woman was morphine-naïve, making her vulnerable to respiratory depression. At hospital admission, nursing observations were inadequate: the door was closed, two nurses miscommunicated about monitoring duties, and no observations were documented for over 2 hours. Peak morphine concentration coincided with the 2am check that was not performed. Critical lessons include: correct morphine dosing based on age not weight; morphine contraindicated in acute migraine; mandatory documented observation protocols when opioids administered, especially in morphine-naïve patients; clear nurse communication and supervision. The coroner found suitable guidelines could have prevented this death.
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Specialties
general practiceemergency medicinegeneral medicinepharmacologypathology
absence of guidelines for safe opioid administration at regional hospital
Coroner's recommendations
The Minister for Health should give consideration to how the Department might provide assistance in regular dissemination of information to Directors of Nursing in regional hospitals concerning developments relevant to patient safety and welfare to promote consistency of practice between larger hospitals and regional hospitals.
The Minister for Health should make necessary arrangements as soon as possible to ensure that all hospitals within the State are alerted to the Royal Adelaide Hospital guidelines for the administration of intermittent subcutaneous and intravenous opioid administration for acute pain management.
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