Overview

• Chloe Alicia Ellis, 29, died in September 2024 at Leeds General Infirmary after her pulmonary embolism was misdiagnosed as a viral illness at Dewsbury District Hospital.
• Coroner Oliver Longstaff found that hospital doctors failed to record her use of the combined oral contraceptive pill Yasmin, which would have led to anticoagulant treatment.
• An NHS111 online assessment had flagged her risk of pulmonary embolism but its findings were unavailable to emergency staff due to poor digital integration.
• The coroner concluded that with proper history-taking and access to NHS111 data, effective treatment would likely have prevented her death.
• West Yorkshire Integrated Care Board is now reviewing NHS111 connectivity and history-taking protocols to prevent similar incidents.