Abstract:Winters seminal work in the 1960s relating to providing an optimal level of moisture to aid wound healing (granulation and re-epithelialisation) has been the single most effective advance in wound care over many decades. As such the development of advanced wound dressings that manage the fluidic wound environment have provided significant benefits in terms of healing to both patient and clinician. Although moist wound healing provides the guiding management principle confusion may arise between what is deemed to be an adequate level of tissue hydration and the risk of developing maceration. In addition, the counter-intuitive model 'hyper-hydration' of tissue appears to frustrate the moist wound healing approach and advocate a course of intervention whereby tissue is hydrated beyond what is a normally acceptable therapeutic level. This paper discusses tissue hydration, the cause and effect of maceration and distinguishes these from hyper-hydration of tissue. The rationale is to provide the clinician with a knowledge base that allows optimisation of treatment and outcomes and explains the reasoning behind wound healing using hyper-hydration.Key Words: Hyper-hydration, Hydration, Moisture Balance, Maceration, Skin, Wound Dressings
Introduction:A homeostatic moist wound environment is generally accepted as beneficial to the healing process and co-exists with an adequately hydrated wound. Conversely, maceration of the peri-wound skin is considered to have a far-reaching and negative influence which impacts adversely on the patient, clinician (1, 2) as a result of putative excessive hydration. A lack of clarity exists in respect of the optimal level of hydration required to support healing and, in like manner, the origin of fear associated with excessive hydration of the peri-wound skin (maceration) appears to be founded on anecdotal evidence at best. (2) This paper endeavours to clarify understanding of tissue hydration in relation to wound healing, maceration and to rationalise the counter intuitive model of healing through hyper-hydration. Developing understanding, based on the available evidence, of wound/soft tissue hydration, peri-wound maceration and the nuances of hyper-hydration has the potential to improve not only patient outcomes but also clinicians' appreciation of topical wound dressings and the role they have to play in support of healing.