Stafford nurse Ann King has been struck off the nursing register for failing to recognise a patient was diabetic at Stafford Hospital.
Her colleague Jeannette Coulson was given a caution order for three years by the panel at the Nursing and Midwifery Council.
Both nurses failed to check Gillian Astbury's notes or check her blood sugar levels. The 66-year-old was not given insulin for 48 hours and as a result fell into a diabetic coma and died in April 2007.
The panel at The Nursing and Midwifery Council said it accepted there were serious staff shortages and a lack of support from senior management at the time, but said Gillian Astbury had died due to a lack of patient care.
The panel said striking Ann King off the nursing register was the only sanction which would protect the public.
The panel said Jeannette Coulson did not have primary responsibility for the patient and was a committed and caring nurse who was working in a hospital with systematic failures.
Both nurses have now retired from the profession.
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