Two complaints of medical blunders were made to the Hospital Authority's Public Complaints Committee yesterday. Mok Ka-po, 54, died on July 7, two weeks after surgery for cancer of the tongue at Yan Chai Hospital. He underwent surgery on June 24 but had breathing difficulties two days later and was sent to intensive care. He fell into a coma after three hours and later died. 'We were told by the two nurses that they did not hear any alarm from the [electrocardiograph] machine when my father's heart stopped,' said Mok's daughter, who refused to give her name. She said the family was angry and disappointed the hospital had not given a thorough explanation of the circumstances of the death. The hospital said it was sorry for the death but believed there had been no medical blunder and that medical staff had done their best to save Mok. In the second case, a woman who refused to give her name complained of receiving inadequate treatment for burns at Prince of Wales Hospital. An ambulance took her to the hospital's emergency unit after her legs and arms were burned with boiling water on April 4. Medical staff told her the burns were not serious and asked her to clean them herself. Four days later her injuries had worsened, and she now believes the doctor who treated her gave her the wrong ointment for the burns. She ended up spending 15 days in hospital because of the injuries. 'I was fired after the treatment and life became difficult as I am a single mother and have two children to raise.' She is now supported by welfare payments.