Crush injuries (chest and abdominal injuries and chest compression) sustained in a wastepaper compactor accident
AI-generated summary
Daniel Thomas Knight, aged 43, died from crush injuries sustained while attempting to clear a blockage in a wastepaper compactor (model TCU 660) at a printing business. The compactor had never functioned correctly due to missing safety components (rotary valve, airlock, or air balancing fan), requiring frequent unblocking. Despite being told not to touch the machine and despite the air and power being switched off, both were mysteriously switched back on. Mr Knight entered the compactor with a rake to clear a blockage and accidentally contacted the left-hand compacting ram, which retracted and then extended, trapping him between both rams under 5 kilonewton force. Multiple safety failures contributed: inadequate machinery design and installation, no staff training on isolation procedures, failure to dissipate stored energy, and lack of proper guarding and interlocks. Prompt recognition and CPR attempted, but injuries were fatal.
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Specialties
occupational and environmental healthforensic medicineemergency medicineintensive care
Error types
systemproceduralcommunication
Drugs involved
antiepileptic drugs
Clinical conditions
cerebral palsy with right-sided weakness
Contributing factors
Compactor not functioning correctly due to missing rotary valve or airlock
Frequent jamming requiring manual unblocking
Air supply and electrical power switched back on despite being turned off
No energy isolation procedure in place
No proper guarding or interlocks to prevent ram movement when guard opened
No training or instruction provided to Mr Knight on machinery isolation
Stored pneumatic energy not dissipated when front guard opened
Right-hand ram leaking causing overnight creep
Vinyl strip covering control panel preventing visibility of power status
Lack of site-specific risk assessment by machinery manufacturer
Inadequate design of electrical and pneumatic control systems
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