He triaged the referral as "semi-urgent" and the relevant appointment was made for May.

A nurse fast-tracked this to the next month, but with continued visits failed to assess pain and escalate care.

When the patient showed for appointment at the end of May she was diagnosed with critical limb ischaemia - a severe obstruction of the arteries which reduces blood flow to hands, feet and legs and can cause ulcers or sores.

"Various limb salvaging procedures were performed, but Mrs B suffered complications and passed away," the report read.

The investigation and Hill's report into the inquiry was prompted by a complaint from the patient's son.

His mother had suffered from type 2 diabetes as well as several other health issues and had lived at home with weekly home help.

The particular right that the report stated had been breached was the patient's right to have services provided "with reasonable care and skill".

Following the report's findings it was recommended the DHB promptly provide updates of a new "clinical portal" system as well as create and implement a training system programme for district nurses on pain management.

Hill also recommended the DHB and one of its nurses provided a written apology to the patient's family for failings identified in the report.

"The apologies are to be sent to HDC within three weeks of the date of this report, for forwarding to Mrs B's family. RN D has already provided an apology," Hill wrote.

Whanganui DHB has been approached for comment.