Medical bed means an appliance or other article which is intended for use on the human body, the effects of which on the surface of the human body are not obtained by pharmacological, immunological, or metabolic means, but which may be involved in, and act as an adjunct to, such means; and whose use is intended to achieve the following intended purposes: (i) prevention, diagnosis, treatment, monitoring, and alleviation of disease; (ii) diagnosis, treatment, monitoring, alleviation, and compensation for injury or disability (ii) the diagnosis, treatment, supervision, alleviation, and compensation of injury or disability.