Aquacel is a Hydrofiber dressing, a type of moisture-retentive wound dressing made from sodium carboxymethylcellulose fibers. When these fibers come into contact with wound fluid, they absorb it and transform into a soft, cohesive gel that keeps the wound moist while locking exudate in place. It’s manufactured by ConvaTec and used across a wide range of acute and chronic wounds.
How Hydrofiber Technology Works
The defining feature of Aquacel is its Hydrofiber construction. The dressing is made of soft, non-woven fibers derived from a cellulose-based material called sodium carboxymethylcellulose. These fibers don’t just sit on the wound surface. They actively pull fluid directly into themselves, swelling and fusing together to create a gel sheet that conforms closely to the wound bed.
This gel does two important things. First, it maintains a moist healing environment, which helps tissue regenerate faster than it would under a dry dressing. Second, it traps wound fluid vertically, meaning the moisture gets absorbed straight down into the fiber rather than spreading sideways across the dressing. That vertical absorption pattern is a key difference between Hydrofiber and older dressing types like gauze or alginate, where fluid wicks laterally and can saturate healthy skin around the wound edges.
How Aquacel Differs From Alginate Dressings
Aquacel is sometimes confused with alginate dressings because both are soft, absorbent, and gel-forming. But they handle fluid very differently. In laboratory comparisons, Hydrofiber dressings kept absorbed fluids locked in place without mixing or bleeding into surrounding areas. When researchers exposed both types to a series of dyed fluids (simulating wound exudate), the Hydrofiber dressing locked each one in separately. Alginate and gauze dressings largely failed this test, with fluids mixing freely throughout the material.
This matters in practice because a dressing that locks fluid in place is less likely to leak, less likely to macerate (soften and damage) the skin around the wound, and better at containing bacteria within the gel rather than letting them spread.
Which Wounds Aquacel Is Used For
Aquacel is designed primarily for wounds that produce moderate to heavy amounts of fluid. Common uses include pressure ulcers, venous leg ulcers, diabetic foot ulcers, partial-thickness burns, surgical wounds, and traumatic wounds. It’s also chosen for wounds that are painful or prone to bleeding, since the gel layer can reduce friction against the wound bed during wear and at removal.
The dressing works across different stages of healing. It can be applied to wounds with wet dead tissue (necrosis), wounds covered in slough, and wounds that are actively granulating (building new tissue). It is not typically the right choice for dry wounds, since the fibers need moisture to activate and form their gel.
Aquacel Product Variants
The Aquacel line includes several versions tailored to different clinical needs.
- Aquacel Extra is a reinforced version of the standard Hydrofiber dressing, built with additional fiber layers for higher absorbency. It targets moderate to heavily exuding wounds where the standard version might become saturated too quickly.
- Aquacel Ag contains ionic silver woven into the Hydrofiber. As the dressing absorbs wound fluid, the silver releases into the gel and acts as an antimicrobial agent. This version is used for wounds that are infected or at high risk of infection, including chronic ulcers and second-degree burns.
- Aquacel Foam adds a foam backing layer to the Hydrofiber core. In a study comparing standard Aquacel to the Foam version on skin graft donor sites, patients using the Foam dressing reported significantly less pain during removal (average pain score of 0.8 versus 3.1 on a standard scale). The Foam group also experienced less exudate leakage and needed fewer doses of pain medication.
How It’s Applied and Changed
Aquacel is a primary dressing, meaning it goes directly onto the wound surface. In most cases, it needs a secondary dressing on top, such as a film or adhesive pad, to hold it in place and provide an outer barrier. Some Aquacel variants with adhesive borders are self-contained and don’t require a separate cover.
The dressing is typically changed at least once per week, though the exact schedule depends on how much fluid the wound is producing. A dressing that feels heavy, saturated, or is leaking at the edges generally needs to be replaced sooner. Signs that something has changed with the wound itself, such as increasing pain between dressing changes, new redness around the wound edges, swelling, odor, or a sudden increase in fluid, are reasons to have the wound reassessed rather than simply swapping in a fresh dressing.
Because the gel conforms to the wound bed, removal tends to be less traumatic than with traditional gauze dressings. The gel lifts away more cleanly, reducing the risk of pulling away new tissue or reopening the wound surface. If the dressing has dried out (which can happen on lighter-exuding wounds), moistening it with sterile saline before removal helps prevent sticking.
Who Should Not Use Aquacel
The main contraindication is a known sensitivity or allergic reaction to any component of the dressing. For the silver-containing version (Aquacel Ag), this includes sensitivity to silver. Beyond that, the dressing is broadly compatible across wound types and patient populations, which is one reason it has become a standard option in wound care formularies.