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. 
 
 Robert Entenman, 57, died after having an op to repair a broken valve in his heart at London Bridge Hospital, one the country’s largest private hospitals. 
 
 SWNS:South West News Service 2 Robert Entenman, 57, with wife Athina and children Alexander and Chloe. 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 Corners Court heard his recovery was progressing normally in the hospital’s intensive care unit. 
 
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 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. 
 
 The humidifier on the ventilator, which helps prevent the build up of mucus in the lungs, had been turned off for 19 hours, the inquest heard. 
 
 After his cardiac arrest doctors believed there wasn’t any brain damage as the issue had been picked up quickly and he had been stabilised. 
 
 But two days later, on May 26, doctors carried out CT scan and found there had been significant brain injury and he eventually died on May 30. 
 
 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. 
 
 On the morning of May 23, Dr Wyncoll was told Mr Entenman had gone into cardiac respiratory arrest and there was “a rapid deterioration”. 
 
 Dr Wyncoll, who rushed to the hospital, said: “I got there just as they took out the old tube out and just get it (the new one) back in. 
 
 “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. 
 
 After seeing him on the May 22, Mr Birdi said: “I was so pleased by what I saw. He was moving his arms and trying to speak to me. He shook my hand. 
 
 “I said to him all was going to be fine and I left.” 
 
 Central News 2 Mr Entenman had the operation at London Bridge Hospital, one the country’s largest private hospitals 
 
 At 6am of the next day he was at his home in Canary Wharf when he was told Mr Entenman had gone into respiratory arrest. 
 
 He said: “I was completely dismayed and shocked to hear this and I didn’t understand how it could be. 
 
 “I was told an ET tube bad become blocked by something.” 
 
 At the hospital he asked how long Mr Entenman’s had gone without oxygen and the risk of brain injury and was told it was a limited period of time and resuscitation had been swift. 
 
 Mr Birdi said: “I felt reassured at the time the resuscitation team had done a good job. 
 
 “I have never seen any one in my entire career die from a blocked ETT tube which led to a brain injury. That is why I remained optimistic.” 
 
 However on May 26 he received a message from Mrs Entenman’s wife, who was “extremely worried about him”. 
 
 Mr Birdi said another CT scan was performed because of fears there may have been more significant brain injury. 
 
 After being shown the results of the scan he said: “This indicated to me there was significant brain injury from which he was unlikely to make a recovery.” 
 
 Pathologist Dr Simi George gave the cause of death as “1A hypoxic ischaemic brain injury”. 
 
 Dr Andreas Marnerides, who presented the report, said Mr Entenman died “because there was not enough oxygen to the brain. The reason for that was he blockage of the ET tube.” 
 
 The inquest continues. 
 
 We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368 ||||| A City banker died as a result of neglect following a heart operation at a leading private hospital, an inquest ruled. 
 
 Robert Entenman, 57, died when the humidifier was turned off for 18 hours at London Bridge Hospital by a nurse who believed it would help cool him down, the hearing was told. 
 
 The humidifier was switched off by nurse Priyan Bastian after Mr Entenman complained about the heat in his room at the hospital because the air conditioning had broken. 
 
 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. 
 
 Coroner Henrietta Hill QC concluded at the end of the five-day hearing that the failure to provide Mr Entenman with the humidifier amounted to neglect. 
 
 She also found delays by medical staff in identifying the tube had been blocked played a causative role in his death. 
 
 American-born Mr Entenman, who had lived in Britain for more than 30 years, had successfully come through the operation 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. 
 
 The inquest heard his recovery was making progress in the private hospital's intensive care unit, and was on a ventilator for almost the entire time. 
 
 But eight days after his operation he went into respiratory cardiac arrest after one of the ventilator pipes, the endotracheal tube (ET tube), became blocked by a "dark brown solid mucus plug" preventing oxygen from getting to the lungs. ||||| 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. 
 
 His life support machine was turned off on May 30 last year after tests showed that oxygen starvation during the 15-minute arrest had left him with a “very significant brain injury”. 
 
 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. 
 
 The operation had lasted 10 hours after surgeon Interpaul Birdi was forced to abandon plans to carry out the procedure by keyhole surgery and moved to “plan B” - opening the chest in the “traditional way” - after encountering a series of “hurdles”. 
 
 An intensive care doctor looking after Mr Entenman said he believed the pipe to his airway became blocked with “sticky” mucus because a humidifier designed to prevent secretions building up had been switched off. 
 
 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. 
 
 “There was a thick mucus plug at the tip of the ET tube,” he said. “I think it was most likely that that, in retrospect, was the cause of the arrest.” 
 
 He added: “I feel the absence of the humidifier for a prolonged period of time had made them (secretions) sticky leading to the tube blocking.” 
 
 Pathologist Dr Simi George gave the primary cause of death as “hypoxic ischaemic brain injury”. 
 
 Mr Entenman, who lived near Chislehurst, had type-2 diabetes and weighed 22st with a BMI above 40, making him technically obese. 
 
 Medical records read in court suggested he drank 18 pints a week, though higher and lower figures were also mentioned. He wanted the heart repair to enable him to go on to have a hip replacement operation. 
 
 Coroner Henrietta Hill QC said letters his wife Athina sent after his death to Mr Birdi and the hospital, run by private healthcare firm HCA, raised a “range of concerns” about her husband’s treatment. 
 
 Mr Birdi told the court that the probability of repairing the heart valve was “in excess of 95 per cent”. 
 
 He added: “I quoted it as 98 per cent, though I updated it as 99 per cent. There was a very high likelihood we would be able to repair his valve.” 
 
 After the operation, Mr Entenman was placed on a heart and lung ventilator. Recalling a visit to his patient on May 22, Mr Birdi said he had been well enough to shake his hand. 
 
 “I was so pleased to see Mr Entenman,” Mr Birdi said. “His eyes were open. He was attempting to speak to me round the tube in his windpipe. 
 
 "I thought it was only a matter of time before Mr Entenman would be off the ventilator. I reassured him that all was going to be fine. 
 
 “Mrs Entenman had some concerns about the room. The temperature in the room was very high.” 
 
 The court heard that a humidifier was being used to moisten the gases supplied via the ventilator. If the air is too dry, this can cause secretions to block the tube. 
 
 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. 
 
 Dr Andreas Marnerides, who presented the report, said Mr Entenman died “because there was not enough oxygen to the brain. 
 
 “The reason for that was the blockage of the ET tube.” 
 
 Dr Wyncoll said Mr Entenman had suffered “complications” after the heart surgery. He was agitated, suffering a “significant inflammatory response” and his kidneys were failing. 
 
 Dr Wyncoll said: “Six to seven days after his operation, he still needed intensive care. Though I would hope we would be able to get him through, he was by no means out of the woods.” 
 
 Mrs entenman’s lawyer, Paul McNeil, of Fieldfisher, is investigating whether to bring a High Court negligence claim at the conclusion of the hearing. 
 
 The inquest resumes today and is expected to last until the end of the week.
– 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.)