Investigation and inquest
On 20th July 2023 I commenced an investigation into the death of Michael Trevor Walton, 66.
The investigation concluded at the end of the inquest on 3rd July 2024.
The medical cause of death was 1a) Ischaemic hypoxic brain injury; 1b) Aortic arch injury during coronary artery bypass procedure.
The conclusion of the inquest was that Mr Walton died due to a very rare complication of a necessary surgical procedure.
Circumstances of the death
Mr Walton suffered from coronary artery disease for which he elected to undergo a coronary artery bypass procedure. He was a good candidate for the surgery and at low risk of complications. The procedure was undertaken on 13th June 2023. The Consultant Surgeon’s preferred choice of cannula was not available due to supply issues and a cannula with a slighter shorter tip was therefore used by the operating surgeon. During the course of the procedure, the aortic cannula became dislodged causing a loss of perfusion and a prolonged period of interrupted blood flow to the deceased’s brain which caused an ischaemic hypoxic brain injury from which he died on 13th July 2023 at the Eden Valley Hospice, Durdar Road, Carlisle.
Coroner’s concerns
(1) The surgeon’s preferred choice of cannula was not available for the procedure due to supply issues.
(2) A cannula with a shorter tip was therefore used for the procedure.
(3) The cannula type contributed to its dislodgement from the lumen of the aorta and to Mr Walton’s death.
(4) An arterial catheter is a basic and inexpensive medical device used daily in a hospital setting.
(5) Operating surgeons are best placed to decide on the most appropriate equipment to use and should not be restricted in that choice by supply shortages.
(6) Using sub-optimal medical equipment poses an avoidable risk to patients of significant harm including death.