Aquacel Ag is a wound dressing made from soft, absorbent fibers infused with silver to fight bacteria. Manufactured by ConvaTec, it combines a specialized fiber technology with ionic silver to create a moist, antimicrobial environment over a wound while absorbing fluid. It’s used on everything from minor cuts and burns to complex surgical wounds and chronic ulcers.
How the Dressing Works
The “Aquacel” part of the name refers to the dressing’s base material: fibers made from sodium carboxymethylcellulose, a plant-derived hydrocolloid. When these fibers come into contact with wound fluid, they absorb it and transform into a soft gel. This gel locks moisture against the wound bed, which supports the body’s natural healing process while preventing the dressing from drying out and sticking to new tissue. That gel-forming action is what ConvaTec markets as “Hydrofiber Technology.”
The “Ag” stands for silver, the chemical symbol on the periodic table. The dressing contains ionic silver, which is slowly released into the wound over time. Silver works against bacteria through multiple pathways: it disrupts the processes bacteria use to produce energy, interferes with their ability to replicate DNA, and damages components of their cell membranes. The result is broad-spectrum antimicrobial activity that’s been shown to last up to 14 days from a single application.
What Wounds It’s Used For
For everyday use without professional supervision, Aquacel Ag is appropriate for minor abrasions, small cuts, lacerations, and minor scalds or burns. These are the kinds of wounds where you’d normally reach for a standard bandage but want extra protection against infection.
Under the guidance of a healthcare provider, the dressing covers a much wider range of wound types:
- Chronic wounds such as diabetic foot ulcers, venous leg ulcers, arterial ulcers, and pressure sores
- Partial-thickness (second-degree) burns
- Surgical wounds healing from the inside out
- Traumatic wounds including those prone to bleeding after surgical cleaning
- Oncology-related wounds with drainage, such as fungating tumors or cutaneous metastases
The dressing can also be used on wounds with minimal or no drainage, not just heavily weeping ones. For deeper wounds like sinus tracts or fistulae, it can be loosely packed into the wound cavity.
How Well It Reduces Infection
A randomized controlled study of 240 patients undergoing knee replacement surgery compared Aquacel Ag to standard gauze dressings. The group using Aquacel Ag had a superficial surgical site infection rate of just 0.8%, compared to 8.3% in the standard dressing group. That’s roughly a tenfold difference. Statistical analysis confirmed that the Aquacel Ag dressing was an independent factor in reducing infection risk, with patients in the standard dressing group about 14 times more likely to develop a surgical site infection. Skin blistering around the wound was also lower in the Aquacel Ag group (2.5% versus 5.0%), though that difference was not statistically significant.
How to Use It
When applying Aquacel Ag, the dressing should overlap onto the surrounding healthy skin by at least 1 centimeter on all sides. This ensures full coverage of the wound edges. You can cut the dressing to fit an awkward shape or a smaller wound. Because the Hydrofiber material is not adhesive on its own, you’ll typically need a secondary dressing or medical tape over the top to hold it in place.
The standard recommendation is to keep the dressing in place for up to 7 days, removing it on day 8 or at your next scheduled dressing change. However, if the dressing becomes fully saturated and fluid starts leaking past the edges, it should be changed sooner. The silver remains active for up to two weeks, so even a full seven-day wear period stays within the window of antimicrobial protection.
Removal is generally comfortable because the gel that forms over the wound prevents the fibers from bonding to new tissue. This is a notable advantage over traditional gauze, which can dry into the wound and cause pain or tissue damage when pulled away.
Silver Sensitivity and Precautions
The main concern with any silver-containing dressing is the possibility of an allergic reaction. Some people with metal hypersensitivities can develop allergic contact dermatitis, which shows up as localized redness, itching, or a rash around the dressing site. This is uncommon, but if you have a known sensitivity to silver or other metals, it’s worth flagging before the dressing is applied. If you notice new irritation or worsening redness around the wound that doesn’t match the pattern of normal healing, it could signal a reaction to the silver rather than a wound infection.
Aquacel Ag vs. Aquacel Ag+ (Extra)
ConvaTec sells several versions of the dressing, and the naming can be confusing. The standard Aquacel Ag contains the Hydrofiber material plus ionic silver. The newer Aquacel Ag+ Extra (sometimes written as Aquacel Ag Plus) adds additional components designed to disrupt biofilms, which are the protective slime layers that colonies of bacteria build around themselves. Biofilms make infections harder to treat because they shield bacteria from both the immune system and topical antimicrobials. If a wound is chronically infected or slow to heal despite treatment, the Ag+ version may be more appropriate. Your wound care provider can determine which version suits the wound’s current state.