Mesalt is a wound dressing made of highly concentrated sodium chloride (salt) crystals woven into an absorbent fabric. It is used primarily to clean wounds that have moderate to heavy drainage, particularly those containing dead tissue, slough, or signs of infection. The dressing works by creating a salt-rich environment that actively pulls fluid, bacteria, and debris out of the wound bed.
How Mesalt Works
The dressing relies on a simple principle: salt draws moisture. When Mesalt is placed on a wound, it absorbs the fluid (called exudate) that the wound produces. As that fluid soaks into the fabric, the sodium chloride crystals dissolve and create what’s known as a hypertonic environment, meaning the salt concentration at the wound surface is much higher than inside the surrounding tissue.
This concentration difference creates a pulling effect. Wound fluid, bacteria, and dead or dying tissue are drawn upward into the dressing and away from the wound bed. The process is sometimes called autolytic debridement, because the body’s own fluid dynamics do the cleaning work rather than a clinician physically cutting tissue away. Over successive dressing changes, the wound bed gradually becomes cleaner and better prepared to heal.
Types of Wounds Mesalt Is Used For
Mesalt is designed for wounds that are wet and messy, not clean and dry. The main scenarios where it gets used include:
- Wounds with yellow slough or fibrin: These are wounds covered in a layer of dead tissue that needs to be removed before healing can progress. Mesalt helps lift that material off the wound bed over time.
- Infected wounds: Because the dressing draws bacteria into its fabric, it can be applied directly over tissue showing signs of infection.
- Deep or tunneling wounds: Mesalt can be cut or folded to pack into cavities, undermining, or sinus tracts in full-thickness wounds.
- Wounds with heavy drainage: Any wound producing moderate to high amounts of exudate is a candidate, since the dressing needs that moisture to activate its salt-based mechanism.
- Hypergranulation: When a wound produces too much new tissue (a bumpy, raised surface that rises above the skin level), Mesalt can help reduce the excess and bring the wound back to a healable state.
In clinical wound care guidelines, Mesalt is also listed as an option for wounds being treated under compression bandaging, which is common in managing leg ulcers caused by poor circulation.
When Mesalt Should Not Be Used
Because Mesalt depends on absorbing fluid to work, it is not appropriate for dry wounds or wounds with very little drainage. Placing a hypertonic salt dressing on a dry wound bed could damage healthy tissue, cause pain, and delay healing rather than promote it. The dressing is meant for the “cleaning” phase of wound care, not for wounds that are already clean, pink, and rebuilding tissue normally.
If a wound has transitioned from the messy, sloughy stage to a healthier state with fresh granulation tissue forming, your wound care provider will typically switch to a different type of dressing that keeps the wound moist rather than pulling fluid out of it.
How Mesalt Compares to Other Dressings
Mesalt occupies a specific niche in wound care. Alginate dressings (made from seaweed-derived fibers) also absorb moisture and can be used in deep wounds, but they don’t create the same salt-driven pulling effect. Alginates are versatile across a wider range of wound stages, from shallow pink wounds to deeper cavities, and they’re also useful for minor bleeding because the calcium in the fibers helps with clotting.
Mesalt tends to be chosen specifically when the wound needs active cleaning. Clinical wound care guidelines position it alongside antimicrobial options for infected wounds, while alginates are more of a general-purpose absorptive dressing. In practice, a wound might start with Mesalt to clear slough and infection, then transition to an alginate or another moisture-retaining dressing once the wound bed is cleaner.
How It Is Applied
Mesalt is used as a primary dressing, meaning it goes directly onto the wound surface. For shallow wounds less than a centimeter deep, the dressing is laid flat over the wound bed. For deeper wounds with cavities or tunnels, it can be loosely packed into the space to ensure contact with the tissue that needs cleaning. It should not be packed tightly, as the material needs room to absorb and expand.
A secondary cover dressing is always placed over the top to hold Mesalt in place and manage any fluid that passes through. The frequency of dressing changes depends on how much drainage the wound is producing. Wounds with heavy exudate may need more frequent changes, while those with moderate drainage can often go longer between changes. Your wound care provider will set a schedule based on how quickly the dressing becomes saturated and how the wound is responding.
Before each new application, the wound is typically rinsed to remove any loosened debris. Over several dressing changes, you should see the wound bed becoming progressively cleaner, with less slough and a shift toward healthier-looking tissue underneath.