Ang 2011 09 21 13 31 50 906
Deceased
Nicholas Choon Choon Ang
Demographics
29y, male
Date of death
2005-08-22
Finding date
2011-09-02
Cause of death
acute bronchopneumonia complicated by multi-drug toxicity
AI-generated summary
Nicholas Ang, aged 29, with schizoaffective disorder, died from acute bronchopneumonia complicated by multi-drug toxicity while in a psychiatric unit. Admitted 12 August 2005, he was on clozapine, valproic acid, and clonazepam. After sustaining thermal burns on 21 August, the resident medical officer prescribed Panadeine Forte (codeine-containing analgesic) without consulting the psychiatric team. Nicholas became profoundly sedated—sleeping through painful wound dressing—but these warnings were not escalated. He was found unresponsive at 04:00 on 22 August; resuscitation failed. Autopsy revealed toxic levels of codeine and morphine, exacerbated by CYP2D6 polymorphism affecting drug metabolism. Critical failures: RMO not consulting psychiatrist before prescribing medication; inadequate close observation procedures; staff lack of knowledge about drug interactions. The coroner recommended improved observation protocols, mandatory specialist consultation for medication changes, and enhanced mental health staff training in pharmacology.
AI-generated summary and tagging — may contain inaccuracies; refer to original finding for legal purposes.
Error types
Drugs involved
Clinical conditions
Procedures
Contributing factors
- multi-drug toxicity from combination of clozapine, clonazepam, valproic acid, codeine and morphine
- lack of consultation between resident medical officer and psychiatric team regarding medication prescribing
- inadequate close observation procedures
- failure to recognize and escalate signs of excessive sedation
- CYP2D6 polymorphism affecting drug metabolism
- possible aspiration of gastric contents
Coroner's recommendations
- NSW Health Chief Pathologist to arrange collection of sufficient blood for toxicology and genetic testing in drug toxicity cases, with samples retained for future testing
- Revision of close observations form to: (a) require documentation of actual time observations were carried out rather than assuming 10-15 minute intervals, and (b) require nurses to record summary comments of observations made and their purpose
- NSW Health to require consultation with suitably experienced medical practitioner when material changes are made to a patient's drug regime, including advice on special monitoring considerations
- NSW Health to establish appropriate protocols for treating mental health patients with non-mental health illness or injury, whether by specialist consultation, treatment in non-mental health wards, or other means
- NSW Health to review knowledge of pharmacogenetics and pharmacokinetics among all medical officers, nursing staff and pharmacists in mental health wards, with additional training as needed
- NSW Health to implement rotation of mental health nursing staff to general medical and surgical wards to maintain and update general nursing skills and knowledge
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