The risk factors were the tracheotomy or tracheal intubation, the weak body situation, the bed arrangement in ICU, the hand hygiene and the procedure of aseptic operation.

A French couple in a similar arrangement quietly upgraded to a two-bed, first-class cabin.

The effect of in-bed tube structure on bed fluidization as well as that of the fluid-bed combustion on heating surface arrangement is also discussed in the paper.