Moisture-Donating Dressings for Dry and Sloughy Wounds
A hydrogel dressing is mostly water held in a gel matrix, and unlike every other dressing family it gives moisture to the wound rather than taking it away. This collection carries the Integra LifeSciences MEDIHONEY range in gel, hydrogel colloidal sheet and HONEYCOLLOID formats, plus Abrasia and Pierce gels.
That reversal is the whole reason hydrogel exists as a separate category. Absorbent dressings assume the wound is producing more fluid than is good for it. A dry wound bed has the opposite problem: cell migration across the surface stalls without moisture, and a dressing that absorbs makes it worse.
→ Part of Advanced Dressings. Also see Foam Dressings, Gauze & Bandages and All Wound Care.
Autolytic Debridement: What Hydrogel Actually Does
Hydrogel is used not only to hydrate a dry wound but to soften devitalised tissue so the body's own enzymes can break it down and lift it away. That process is autolytic debridement, and it is the mechanism behind most hydrogel use on sloughy or necrotic wound beds.
The logic is straightforward. Dry slough and eschar are hard, adherent and impenetrable to the enzymes in wound fluid that would otherwise digest them. Rehydrating that tissue makes it permeable, and the body then does the work itself over successive dressing changes. It is slower than sharp debridement but it is selective: it removes non-viable tissue without cutting into healthy tissue, and it does not require a clinician with debridement competency at the bedside.
Whether autolytic debridement is the right approach for a given wound, and whether a wound needs debridement at all, is a clinical judgement made against the wound assessment, the underlying cause and the patient's circumstances. Dry stable eschar on an ischaemic limb, for instance, is often deliberately left intact, which makes this a decision for the treating clinician rather than a general rule.
Medical Grade Honey
The MEDIHONEY range uses medical grade honey, which works through osmosis and low pH: the high sugar concentration draws fluid through the wound bed, and the acidity creates conditions unfavourable to bacterial growth.
Two points are worth being precise about. First, medical grade honey is produced, filtered and sterilised for medical use, and it is not interchangeable with food-grade honey regardless of how similar the two look. Food honey is not sterile and may carry bacterial spores.
Second, the osmotic action means honey dressings draw fluid out of the wound bed while the hydrogel carrier keeps the surface moist. That combination is what makes them useful on sloughy wounds: fluid moving outward through the tissue supports the softening and lifting of devitalised material.
Patients occasionally report a stinging sensation on application, which is generally attributed to the low pH and osmotic effect. It is worth mentioning to a patient in advance rather than having them discover it, since an unexpected sensation is what makes people stop using a dressing at home.
Gel or Sheet? Wound Shape Decides
| Gel (tube) | Colloidal sheet | |
|---|---|---|
| Conforms to | Any shape, including cavities and tracts | Flat and shallow surfaces |
| Application | Applied by volume, needs judgement | Placed, simple and repeatable |
| Removal | Irrigated or wiped away | Lifted off in one piece |
| Secondary dressing | Always required | Usually required |
Contact is what makes a hydrogel work. A sheet laid over a cavity bridges it, leaving the wound bed untouched and the dressing doing nothing where it matters. A gel fills the space and contacts the whole surface. Conversely, on a flat shallow wound a sheet is cleaner to apply, easier to remove and easier to teach a patient or a family member to change.
Gel formats
MEDIHONEY gel dressings in DER-31805 and DER-31840, and hydrogel dressings in DER-31640, DER-31720 and DER-31740. Also Abrasia gel and Pierce gel.
Sheet formats
Hydrogel colloidal sheets, which hold the gel in a colloidal matrix so it stays in place and lifts off as one piece: DER-31612, DER-31618 and DER-31738. The HONEYCOLLOID dressing DER-31620 combines honey with a colloidal carrier.
The colloidal sheet format solves a practical problem with plain gels: a gel applied to a wound on a vertical or sloping surface migrates under gravity and body heat, ending up somewhere other than where it was placed. A colloidal matrix holds it.
Secondary Dressings and Peri-Wound Protection
Hydrogel is a primary dressing. It sits on the wound and needs something over it to hold it in place and manage what comes out.
The secondary dressing choice matters more than it appears. Something too absorbent will pull the moisture straight back out of the hydrogel, defeating the point of applying it. Something fully occlusive may trap too much. A low-absorbency cover or a film is generally the pairing, but as the wound changes and exudate increases, both the hydrogel and its cover get reassessed.
Protecting the skin around the wound is the other half. A moisture-donating dressing sitting against intact skin for days will macerate it, so gel should be confined to the wound bed rather than spread onto the margin. On a cavity wound this is straightforward; on a shallow irregular wound it takes care at application. See Foam Dressings and Gauze & Bandages for cover options.
Frequently Asked Questions
What does a hydrogel dressing do?
It donates moisture to the wound rather than absorbing it. A hydrogel is mostly water held in a gel matrix, and it is used where the wound bed is dry or where devitalised tissue needs softening. That makes it the opposite of foam and alginate, which exist to remove excess fluid, and it is why matching the dressing to the exudate level is the core selection decision.
What is autolytic debridement?
The body breaking down devitalised tissue using its own enzymes. Dry slough and eschar are hard, adherent and impenetrable to those enzymes; rehydrating the tissue makes it permeable so the process can happen over successive dressing changes. It is slower than sharp debridement but selective, removing non-viable tissue without cutting into healthy tissue, and it does not require debridement competency at the bedside.
Does every wound with slough need debriding?
No, and the judgement belongs with the treating clinician. Dry stable eschar on an ischaemic limb, for example, is often deliberately left intact rather than rehydrated, because the underlying perfusion will not support healing beneath it. Whether debridement is indicated, and by which method, follows the wound assessment, the underlying cause and the patient's circumstances rather than a general rule.
How does medical grade honey work?
Through osmosis and low pH. The high sugar concentration draws fluid through the wound bed, and the acidity creates conditions unfavourable to bacterial growth. The osmotic movement of fluid outward through the tissue also supports the softening and lifting of devitalised material, which is why honey dressings are used on sloughy wounds.
Is medical grade honey the same as food honey?
No. Medical grade honey is produced, filtered and sterilised specifically for medical use. Food-grade honey is not sterile and may carry bacterial spores, so it is not an acceptable substitute on a wound regardless of how similar the two appear. The sterilisation and manufacturing standard is the whole distinction.
Why do honey dressings sometimes sting?
The sensation is generally attributed to the low pH and the osmotic effect drawing fluid through the tissue. It is worth telling a patient to expect it rather than letting them discover it, particularly where they are managing dressing changes at home, since an unexpected sensation is a common reason people stop using a dressing. Persistent or severe pain should be reported to the treating clinician.
Should I choose a gel or a sheet?
Wound shape decides it. A sheet laid over a cavity bridges the gap, leaving the wound bed untouched and the dressing doing nothing where it matters, while a gel fills the space and contacts the whole surface. On a flat shallow wound a sheet is cleaner to apply, easier to remove and easier to teach a patient or family member to change.
What is a hydrogel colloidal sheet?
A hydrogel held in a colloidal matrix so it stays where it is placed and lifts off in one piece. It solves a practical problem with plain gels: applied to a wound on a vertical or sloping surface, a gel migrates under gravity and body heat and ends up somewhere other than where it was put. The colloidal carrier holds it in position.
Does a hydrogel need a secondary dressing?
Yes. Hydrogel is a primary dressing that sits on the wound and needs a cover to hold it in place. The cover choice matters: something too absorbent pulls moisture straight back out of the hydrogel and defeats the purpose. A low-absorbency dressing or a film is generally the pairing, and both get reassessed as the wound changes and exudate increases.
How do I protect the skin around the wound?
Confine the gel to the wound bed rather than spreading it onto the margin. A moisture-donating dressing sitting against intact skin for days will macerate it, which enlarges the problem area rather than healing it. On a cavity wound that containment is straightforward; on a shallow irregular wound it takes care at application, and a sheet format can be easier to control.
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