Edna Alker died when a student nurse gave her a lethal injection of drugs.

Coroner Christopher Sumner will deliver a narrative verdict at St Helens Hospital.

The inquest, which lasted four days, earlier heard how Rebecca Riley misunderstood her supervisor's instructions when she gave Mrs Alker a fatal dose of potassium chloride following an operation at Whiston Hospital.

Mrs Alker, of Mountfield Court, Orrell, was transferred to Whiston Hospital from Wigan Infirmary because her daughter, Dr Gillian Edwards, worked there.

The pensioner had a successful abdominal operation before dying in the hospital's high-dependency unit.

Ms Riley told how she said she assumed her supervisor, Sister Karen Edwardson, wanted her to administer the potassium chloride, which a doctor had prescribed.

But Sister Edwardson said she only asked the student to prepare the syringe and expected her to wait for her before proceeding.

Ms Riley administered the drug in one dose when it should have been
inserted into a machine to drip feed it over several hours.

The inquest was held at Bootle Town Hall and heard that she assumed the dose was to be given in one go because she was given a smaller syringe often used for that purpose.