AN old woman died after losing a litre of blood following a kidney operation, an inquest heard yesterday. Fok Suet-ha, 70, died at St Teresa's Hospital, having lost about a fifth of her blood from a damaged artery and a torn vein, the court heard. Pathologist Wong Hon-man said the cause of death was severe bleeding during surgical removal of a kidney. The inquest heard Fok went to see Dr Fung Kwok-hay after suffering kidney problems for a long time, and latterly severe back pain. Dr Fung sent her to St Teresa's, Kowloon, on January 16, her son Kwan Kwok-hung told the court, adding that Dr Fung diagnosed a kidney stone and recommended the organ be removed. Dr Fung performed the operation at 1 pm, on January 19, but two hours later he told Fok's daughter Kwan Sau-fong that Fok had lost a lot of blood and her heart had at one stage stopped. By 5.30 pm Fok was unconscious. She died an hour later. The inquest before John Saunders continues today.