RNOtherAdvances in skin & wound care2025

Pressure Distribution Properties in Wound Dressings Using Heel and Sacrum Indenters Under Clinically Relevant Loads.

Sandra Guzman, Kasey Call, Marianne Russon and 3 others

PMID 40178266

WHAT IT FOUND

All five wound dressings lowered peak and average pressure on heel and sacrum models compared with no dressing.

Dressing D had largest sacral contact area and lowest sacral pressures; Dressing B and D had lowest heel average pressure. No patient outcomes are reported.

Key findings

01All five dressings reduced peak pressure and average pressure and increased contact area compared with the control for both heel and sacrum indenters.

02With the sacral indenter, dressing D showed the largest contact area and the lowest pressures, while dressing E showed the smallest contact area and the highest pressures.

03With the heel indenter, dressings B and D showed the largest contact areas and lowest average pressure, and they were not significantly different from each other.

STILL TO COME

How it was doneWhat they foundWhat it means for RNs

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What it does not show

This was bench testing on model indenters, not a study of patients, so it cannot show that dressings prevent pressure injuries. The models did not represent all soft tissue layers, stiffness changes from scars or edema, patient factors, mattress type, moisture or microclimate, and internal shear forces. Only dry conditions and fixed sacral and heel loads were tested. There is no standardized wound dressing pressure test, so comparisons depend on this custom setup. Convatec funded the study in full, an author is employed by Convatec, and the tested dressings include Convatec products.

Declared interests

This work was supported in full by Convatec with an unrestricted grant. The authors state no known financial conflicts, but an author is employed as a Senior Design Scientist at Convatec. All testing and data analysis were carried out at EC-Service, an independent laboratory, with support from an unrestricted grant provided by Convatec.

The easy way to misread this

Do not read this as proof that any dressing prevents pressure injuries in patients. It measured pressure on model indenters only. It did not include soft tissue layers, edema, scars, patient factors, mattress type, moisture, internal shear, or clinical outcomes. A manufacturer of some tested dressings funded the study.

Read it on PubMed →