Abstract: An alternating pressure mattress has two sets (A, B) of cells, which are inflated and deflated cyclically and in sequence, to provide alternating support for a patient. Each set (A, B) has central transverse cells (11a, 11b) and side forming cells (14a, 14b). The central cells (11a, 11b) provide a central region for the patient. The side forming cells (14a, 14b) protrude, when inflated, higher than the central cells, to act as side barriers preventing rolling of the patient off the mattress. At each side of the mattress a plurality of the side forming cells (14a, 14b) of both sets (A, B) is present, these cells inflating and deflating with the respective central cells (11a, 11b), so that the side barrier effect is provided by the two sets (A, B) cells alternatingly.

Abstract: A bedframe for medical beds has a height-adjustable frame member and an obstruction detector on the height-adjustable frame member. The obstruction detector has a contact member which is displaceable, for obstruction detection, both upwardly and downwardly relative to the frame member. A sensor detects such displacement to stop movement of the frame member. The frame member may be a height adjustable lower frame member of a bedframe having also a height adjustable upper frame member. The bedframe also has a manually removable panel of its headboard and footboard, to allow access to a patient between columns carrying the height-adjustable upper frame member.

Abstract: In operation of a support for a patient's body, used in medical or veterinary treatment, which applies alternating-pressure to the body in order to reduce or minimize the risk of pressure sores caused by prolonged pressure on the skin, inflatable cells of the support are inflated and deflated cyclically in a predetermined sequence. To provide improved effect in relieving or preventing pressure sores, the cells are deflated in the sequence in such a manner that the interior pressure falls from 10 mmHg (135 Pa) to 0 mmHg in a time period of not more than 15 s. Preferably the interior pressure falls to below 0 mmHg (ambient atmospheric pressure). A vacuum pump or pumps may be employed to achieve this result.