The Coombe Hospital has apologised to the family a young mother who died of sepsis on Christmas Day three years ago, a week after giving birth.
Karen McEvoy, 24, died on 25 December, 2018 after being wrongly diagnosed with sciatica.
Her fiancé Barry Kelly called her death "completely preventable".
The court heard Ms McEvoy had given birth to her third child on 18 December, 2018.
She was discharged the following day but in the days afterwards she became ill and complained of lower back and abdominal pain.
She returned to the hospital on 23 December for her baby's routine check up and was advised to attend the hospital emergency department for herself.
The court heard she was not admitted to hospital and was discharged without being diagnosed.
On Christmas Day, she was brought to Naas General hospital by ambulance and died before 4pm from multi-organ failure with septicemia due to an infection.
Mr Kelly and their three children; six-year-old Jake, three-year-old Toby and Ruby, who is now two, settled their legal actions against the Coombe in the High Court this morning.
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In a letter, the Master of the Coombe, Professor Michael O’Connell, apologised for the failings in the care given to Ms McEvoy.
He said he fully accepted these failings should not have happened and he could not begin to imagine the consequences of her sad loss on the family.
The court heard as well as the apology, "very substantial compensation" was involved in the settlement although the details are confidential.
Senior Counsel Richard Kean said it was an appalling tragedy and if Karen had got "a modicum of treatment" she would have made an uneventful recovery.
The court was told the hospital had failed to heed her complaints before her discharge and a failure to consider she might be developing sepsis.
Ms McEvoy's lawyers said there was also a failure to notice she was suffering from suspected sepsis when she presented herself at the hospital's emergency department on 23 December.
Outside court, Mr Kelly said his fiancée had been an amazing young woman and mother.
He said her death was completely preventable if she had been properly treated and cared for by the Coombe hospital.
No amount of money, he said, would ever change anything for him or for their three children.
In a statement, the family's solicitor, Niamh O'Brien of O'Brien Murphy solicitors, said a young mother of three children under the age of five had needlessly lost her life as a result of numerous system failures and missed opportunities.
Ms O'Brien said if Ms McEvoy had been properly assessed or triaged, her condition would have been diagnosed and treated and her death prevented.
She said they hoped there would now be an increased awareness of sepsis and septic shock in maternity hospitals throughout the country.