Let me ask the medics on this list about pressure. Say the wound is a gash on a limb. If it was me, I'd avoid putting pressure directly onto the gash, as I imagine that would tend to open the wound further -- like pressing down on a slit in a hot dog.

Rather, I'd try to press the gash closed by wrapping a bandage around the limb.

If this is "right thinking" then the pad may serve to moderate the pressure placed on the gash. It might serve to cushion the wound from the pressure of the wrapping bandage.

Bear