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Preventing pressure sores in hospital: controlled trial of a large-celled ripple mattress
Bliss MR, McLaren R, Exton-Smith AN
British Medical Journal 1967 Feb 18;1(5537):394-397
clinical trial
2/10 [Eligibility criteria: Yes; Random allocation: No; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: No; Point estimates and variability: No. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

This report is a description of a trial of nursing 42 geriatric patients, who were estimated to be liable to develop pressure sores, on a new type of alternating pressure mattress, the large-celled ripple bed, compared with a control group of 41 similar patients nursed on ordinary hospital mattresses. Each patient was nursed in the trial for 14 days under standard nursing care, and a record kept of his clinical progress and the condition of his pressure areas. Compared with the results of the control group, the large-celled ripple bed appeared effective in preventing and healing pressure sores of the trunk and heels. The advantages and disadvantages of this method of treating patients are discussed.
Reproduced with permission from the BMJ Publishing Group.

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