Conducting and interpreting interface pressure evaluations of clinical support surfaces

Interface pressure measurement is a common method to compare various mattresses, operating room beds, or other clinical support surfaces used for patients. The colorful graphs create a good visual display of information. Unfortunately, no standard method exists for performing the measurements or displaying the information. Because the graph is such a good visual representation of the data, many clinicians rely on the look of the graph. However, altering its appearance by simple manipulations of the display characteristics is very easy. This manipulation can lead to inaccurate conclusions about the product and consequent purchase of products that are inappropriate, less effective, or more expensive than others. This article provides basic information about interface pressure measurement and interpretation so that clinicians can make informed decisions about various clinical surfaces.