‘I am invoking Martha’s rule’: how a woman saved her father from near death in hospital

For six awful days last summer, as her father, David, got progressively sicker in the cardiac ward of the John Radcliffe hospital in Oxford, Karen Osenton would read the poster above his bed telling patients about their right under Martha’s rule to ask for a second opinion.

Her father, a retired engineer in his early 70s who was normally extremely fit, was by then thin, jaundiced and could barely lift his head from the pillow. 

David had first gone to his GP more than a month earlier complaining of extreme breathlessness, and over the following weeks he had become increasingly thin and weak with suspected heart failure. But it had taken repeated visits to the accident and emergency ward, being sent home each time, before he was finally given a bed in a specialist cardiac unit last July.

“Every day we saw him he got worse,” says Karen, a teacher from Aynho, in West Northamptonshire. “My mum kept saying: ‘Please, my husband is not right, this is not David. He is so unbelievably poorly.’ He couldn’t walk, he didn’t sleep, he couldn’t eat. Even the other gentlemen in the bay were saying to the nurses: ‘Can you not see this man is extremely unwell?’”

“He was on the edge of the bed, rocking, and he could barely speak. He was so yellow, so gaunt. I just walked to the desk and I said: ‘You will get a consultant here now. I am invoking Martha’s rule. I want somebody to see my dad right now.’”

Within minutes, says his daughter, the room was full of doctors. “He was very close to death. His lungs were filled with fluid. He had multi-organ failure. Within the hour he was in intensive care, fighting for his life.” A senior consultant told Karen her father was “the sickest person in the hospital”.

Oxford University Hospitals NHS foundation trust (OUH), which oversees the hospital, has apologised to the family and admitted it made mistakes in treating David’s cardiac failure. While some of the delays in assessing him were “unfortunately due to service pressures and staffing limitations”, the hospital said after a review of his case, clinicians also failed to spot that he was getting worse, and by the time they did, he was too unwell to have the recommended surgical valve repair. In addition, a “lapse in communication” meant there was confusion between two different teams over which was responsible for his care.

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Source: The Guardian, 1 May 2026

Further reading on the hub:

• The formative evaluation of the implementation of Martha’s Rule: Interim Report (NIHR Policy Research Unit, March 2026)
• Embedding Martha's Rule into practice—Lessons from the national pilot
• Martha's Rule - Merope Mills (Martha’s mother) explains Martha’s story (31 March 2026