IAN Rayson is facing the gloomy prospect of spending Christmas in a hospital bed. More worrying, however, is that doctors have still not found out what has laid low the 30-year-old triathlete for the past three weeks. Soon after taking part in the Singapore long course triathlon on November 20, Rayson, who suffered dehydration during the race, returned to be hospitalised with a viral infection which has affected his vital organs, including his heart, liver and kidneys. Doctors have so far been unable to diagnose what is wrong with Rayson. To make matters worse, further complications set in last Friday when a blood clot was detected in his leg. Colleague and close friend, Ruth Hunt, said the clot came as a shock to everybody. 'He was in a critical condition and in a lot of pain. The doctors treated him immediately with anti-coagulant drugs,' said Hunt. Rayson was placed in intensive care at the Prince of Wales Hospital. He has since been moved to the cardiology ward, but according to Hunt, has experienced pains in his chest since. 'There are fears that the thrombosis has moved up to the lungs. They are still treating him,' she said. With the unexpected clot complication arising, Rayson's as still unidentified viral infection has been shunted into second place until doctors treat him for the more pressing problem. 'No one knows what has happened,' said Hunt, who during the race in Singapore, had to help Rayson across to a water stand. Rayson recovered sufficiently to finish the race in second place.