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Table 1 Inclusion and exclusion criteria

From: Pressure RElieving Support SUrfaces: a Randomised Evaluation 2 (PRESSURE 2): study protocol for a randomised controlled trial

Inclusion criteria

 1. Evidence of acute illness through:

  a. acute admission to secondary care hospital, community hospital or NHS-funded intermediate care/rehabilitation facility

  b. secondary care, community hospital or NHS-funded intermediate care/rehabilitation facility in-patient with onset of acute illness secondary to elective admission

  c. recent secondary care hospital discharge to community hospital or NHS-funded intermediate care/rehabilitation facility

 2. Aged ≥ 18 years

 3. Have an expected total length of stay of 5 or more days

 4. At high risk of PU development due to one or more of the following:

  a. bedfast/chairfast AND completely immobile/very limited mobility (Braden activity score 1 or 2 and Mobility score 1 or 2) [20]

  b. Category 1 PU on any pressure area skin site

  c. localised skin pain on a healthy, altered or Category 1 pressure area skin site

 5. Consent to participate (written informed consent, witnessed verbal consent, consultee agreement (England) or nearest relative/guardian/welfare attorney (Scotland))

 6. Expected to comply with the follow-up schedule

 7. The patient is on an electric profiling bed frame

Exclusion criteria

 1. Have previously participated in the PRESSURE 2 trial

 2. Have a current or previous Category ≥3 PU

 3. Have planned admission to ICU where standard care is alternating-pressure mattress provision

 4. Unable to receive the intervention (for example, sleep at night in a chair or unable to be transferred to randomised mattress)

 5. Patient weight is lower or higher than weight limits for HSF and alternating-pressure mattresses (<45 kg/>180 kg)

 6. It is ethically inappropriate to approach the patient

  1. HSF high-specification foam, ICU intensive care unit, NHS National Health Service, PU pressure ulcer