Family members of a man with kidney failure who died last month of an undetermined cause have urged officials to investigate whether his death was tied to dialysis solutions recalled over contamination fears. The daughter of Lam Chun-tak, 61, believes her father's death on March 26 was related to tainted dialysis solutions he got from a pharmacy with a prescription from a hospital. Lam had been using dialysis solutions three times a day for the past four years. The family's allegation came after the Hospital Authority announced that drug importer Fresenius Medical Care Hong Kong had voluntarily recalled two batches of 'continuous ambulatory peritoneal dialysis solutions', or CAPD, made in Thailand. The daughter said her father had been using the same product from the company. But a spokesman for the importer said all dialysis solutions supplied by the company, including those recalled, had not been contaminated. The recall was ordered because of problems with documentation. The batches - comprising 3,096 bags - had been supplied to eight public hospitals and 61 home patients since June. When given the batch number the father had used, the spokesman said it was not among the recalled products. Ms Lam, who did not want to give her full name, said her father was admitted to Alice Ho Miu Ling Nethersole Hospital with a swollen and inflamed abdomen in early January. She claimed a doctor told her father the symptoms were due to 'problems' with the dialysis solutions he used. She took this to mean they were contaminated. Ms Lam said the doctor prescribed a medicine to clean the dialysis solutions, but did not explain what it was or why it was necessary. A hospital spokesman said the medicine was antibiotics and the hospital did not tell Mr Lau or his family that it was used to sterilise the dialysis solutions. An autopsy is being carried out to determine the cause of death.