Abstract: A saline solution for a clinical or cosmetic use which consists essentially of a solution in water of sodium ions in major amount and potassium ions in minor amount, together with physiologically acceptable counter ions, being isotonic or optionally slightly hypertonic or hypotonic with respect to blood plasma or tears or an otherwise relevant biological fluid, and being substantially free of calcium ions, magnesium ions, phosphate ions, bicarbonate ions and also glucose, sucrose, food starch or other glucose-releasing saccharides, for use as a more cell-friendly alternative to normal saline.

Abstract: A wound dressing comprises a chemically modified polymer which has a free radical activity in the DPPH Test in the range 15-80 percent. It may comprise a chemically modified polymer which carries at least one chemical group which is a persistent free radical or a precursor therefor. It may comprise a chemically modified polymer which carries at least one chemical group capable of reacting with molecular oxygen in a wound environment to form hydrogen peroxide. It may comprise a chemically modified polymer capable of stimulating the activity of macrophages or the proliferation of fibroblasts or both in a wound environment.