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Ms Davis had undergone a thoracotomy operation - a surgical procedure where the chest wall is opened - in the February before her death.

He and a team of medics performed a thoracotomy, opening up her chest and ribs like a clamshell.

He and a team of medics performed an emergency thoracotomy, opening up her chest and ribs like a clamshell.

“He was in surgery for four hours and it was one of the most complicated surgeries I have ever seen,” Mapplebeck said of the thoracotomy.

After the operation, he suffered from thoracotomy syndrome “where it feels like your nerves are on fire inside of you, they won’t meld together. It’s just horrible.”