The city worker had successfully come through the op to repair a broken valve in his heart but died days later after suffering significant brain damage 
 
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 A TOP city banker died when the humidifier on his ventilator was switched off for 19 hours after undergoing major heart surgery, an inquest heard.  A banker who underwent heart surgery at one of London’s top private hospitals died after a key piece of machinery was apparently turned off, an inquest heard 
 
 Robert Entenman, a 57-year-old American with children aged eight and 10, went into cardiac arrest at London Bridge hospital a week after a “99 per cent safe” operation to repair a heart valve. An inquest heard he died when the humidifier on his ventilator was switched off for 19 hours after undergoing major heart surgery 
 
 American born Mr Entenman, who had lived in Britain for more than 30 years, had successfully come through the op on May 15 last year. He was global head of e-commerce for Uni-Credit Bank in the City, but suffered from mitral valve disease, type 2 diabetes, arthritis in the hip and back and had a BMI of 42. Southwark coroner’s court was told yesterday that Mr Entenman, a New York-born department head at UniCredit bank in London, had been placed on a ventilator in intensive care following the heart operation on May 15. Grieving uncle accuses own sister of killing her little girl in dramatic scenes at inquest ‘THEy DIDN’T KNOW WHAT TO DO' Mum died after docs missed THREE chances to treat condition that killed her, inquest told 
 
 But eight days after his operation he went into respiratory cardiac arrest after one of the ventilator pipes became blocked by a “dark brown solid mucus plug”, the inquest was told. Southwark Coroner's Court heard the piece of equipment, which prevents the build up of mucus in the ventilator pipe, was switched off for 18 hours. Dr Duncan Wyncoll, intensive care specialist who treated Mr Entenman after his surgery told the inquest the patient had “elements of organ failure” with issues with his kidneys, liver and lungs. He said: “He was not going to get better quickly, it was going to be a significant period of time and so we would hope to be able to get him through it, but he was by no means out of the woods yet.” 
 
 Mr Entenman had been intubated and was breathing with the help of a ventilator almost the entire time since his surgery. The coroner said: “We may hear evidence to suggest there was a 19-hour period of time when the humidifier was offline.” 
 
 Around 6am on May 23, Mr Entenman went into cardiac arrest. “At the end of the tube was a thick mucous plug right at the tip of the endotracheal tube (ETT). That told me that was the most likely cause of the arrest.” 
 
 Dr Wyncoll said: “I feel the absence of the humidifier for a prolonged period of time had made them (secretions) sticky leading to the tube blocking.” 
 
 Consultant cardiothoracic surgeon, Mr Inderpaul Birdi, told the inquest the surgery was successful and Mr Entenman was starting to make a recovery. Recalling a visit to his patient on May 22, Mr Birdi said he had been well enough to shake his hand. He was attempting to speak to me round the tube in his windpipe. Dr Andreas Marnerides, who presented the report, said Mr Entenman died “because there was not enough oxygen to the brain. Dr Duncan Wyncoll, a consultant intensivist, told the court that he saw a 5cm blockage in the endotracheal (ET) airway tube when it was replaced during the bid to save his life.
– An inquest has blamed the death of an American banker who underwent a routine heart valve operation in Britain on a nurse's mistaken move, reports the Telegraph. Robert Entenman died in 2015 at age 57 at one of Britain's biggest private hospitals, London Bridge. The American, who left the US in the early '80s and worked at major investment banks throughout Europe, had mitral valve disease, type 2 diabetes, and a high BMI of 42, but he had been expected to recover from the procedure. Having been on a ventilator for a week following surgery, Entenman went into cardiac arrest and suffered from a lack of oxygen to his brain after his endotracheal tube became clogged with mucus. Last week, an inquest found that his death was the result of the hospital's neglect, reports the Sun. The surgeon told the court he'd put the probability of successful heart valve repair at 99%, and that days after the operation his patient had recovered enough to shake hands, reports the Standard. But after Entenman complained about being too hot due to broken air conditioning, a nurse turned off the ventilator's humidifier, thinking it would help, the inquest was told. Unfortunately, the device helps prevent secretions from building up and has nothing to do with body temperature. It was off for 18 hours, at which point Entenman went into cardiac arrest. Hospital staff found a "dark brown solid mucus plug" depriving him of oxygen in the endotracheal tube. A CT scan revealed significant brain damage, and the father of two died days later. (Expect to get at least one serious diagnostic error in your life.)