Coronial
VIChospital

Finding into death of Joshua Paul Coates

Deceased

Joshua Paul Coates

Demographics

49y, male

Coroner

Coroner David Ryan

Date of death

2022-03-29

Finding date

2024-06-14

Cause of death

Acute myocardial infarction complicating prosthetic valve thrombosis in a man with mechanical aortic valve replacement and remote reconstructions of the ascending aorta

AI-generated summary

Joshua Paul Coates, aged 49, died from acute myocardial infarction complicating prosthetic valve thrombosis following mechanical aortic valve replacement. Post-mortem examination revealed a large blood clot obstructing his aortic graft and left ventricular outflow tract. Critical clinical lessons emerged: Mr Coates' INR levels (1.6–2.0) fell below the target range (2.5–3.5) for mechanical valves, inadequate anticoagulation significantly increasing thrombosis risk. Systemic failures included incomplete discharge summaries not conveying anticoagulation details to community providers, poor handover between Monash Health and Dorevitch Pathology regarding warfarin management, and delayed patient registration with missing clinical information. The coroner found no single shortcoming would have prevented death in isolation, but the combination of communication failures, incomplete information transfer, and suboptimal anticoagulation management contributed to adverse outcomes. Recommendations focused on improving discharge processes, ensuring accurate patient information capture, and establishing mechanisms for patients to escalate clinical concerns.

AI-generated summary and tagging — may contain inaccuracies; refer to original finding for legal purposes. Report an inaccuracy.

Specialties

cardiothoracic surgerycardiologypathologygeneral practiceemergency medicineintensive care

Error types

communicationsystemdelay

Drugs involved

warfarinmidazolammetoprololondansetron

Clinical conditions

acute myocardial infarctionprosthetic valve thrombosismechanical aortic valve replacementaortic dissectioncardiogenic shockmyocardial ischaemiacardiac arresthypoxic ischaemic encephalopathyacute tubular necrosisacute bronchopneumonia

Procedures

ascending aorta and aortic arch replacement with Dacron graftredo St Jude mechanical Bentall's procedurecardiac catheterisationpercutaneous coronary interventiondrug-eluting stent insertionextracorporeal membrane oxygenation

Contributing factors

  • Inadequate anticoagulation with sub-therapeutic INR levels
  • Incomplete discharge summary not conveying anticoagulation management details
  • Poor clinical communication between Monash Health and Dorevitch Pathology
  • Delay in patient registration with Warfarin Management System
  • Missing clinical information in pathology request including dosing history and indication for clexane bridging
  • Lack of understanding of external pathology service processes by junior medical staff
  • Failure to confirm GP details before discharge
  • Lack of adequate patient information regarding warfarin management registration
  • Complex anatomy from previous aortic reconstructions limiting coronary angiography options at referral hospital
  • Transient thrombotic occlusion of coronary ostia causing fluctuating symptoms

Coroner's recommendations

  1. Monash Health and Dorevitch Pathology should review clinical information system processes for discharged patients and outpatients to ensure systems are user-friendly for staff to accurately capture patient information
  2. Systems should be consumer-friendly to allow patients and carers to swiftly raise clinical concerns about ongoing care
  3. Review Enoxaparin Medication Profile, Warfarin Medication Profile and Antiplatelet and Anticoagulant Medicines – Post Procedural Management Implementation Tool to ensure best practice standards
  4. Optimise and embed the process for anticoagulation of post-operative AVR patients with effective and coordinated discharge planning
  5. Explore feasibility of providing warfarin management service to patients 7-10 days post-discharge to ensure consistent warfarin management and transparent escalation process
  6. Ensure patient GP details are confirmed before discharge and updated in iPM system to ensure accurate distribution of discharge summaries
  7. Ensure process for referring and accepting cardiology and cardiothoracic surgery patients to Victorian Heart Hospital is communicated internally and to referring networks
  8. Implement program to share learnings with Cardiothoracic Surgery Department medical staff
  9. Implement and promote easier pre-registration of new patients on warfarin at Dorevitch Pathology
  10. Conduct refresher training sessions for pathologist teams on warfarin management
  11. Ensure complaints and queries regarding warfarin management are escalated to relevant clinical teams
Full text
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