The yellow gauze wound dressing is most commonly Xeroform, a non-adherent gauze impregnated with a blend of petroleum jelly and 3% bismuth tribromophenate, the compound responsible for its distinctive yellow color. It’s widely used in hospitals and clinics for burns, skin graft sites, and minor wounds because it keeps the wound moist while providing mild antimicrobial protection. A less common yellow gauze, iodoform packing, serves a different purpose and is mainly used to fill wound cavities and abscesses.
What Xeroform Is Made Of
Xeroform starts as a fine mesh sterile gauze. That gauze is then coated with a homogenized suspension of petroleum jelly mixed with bismuth tribromophenate at a concentration of 3% by weight. The petroleum jelly gives the dressing its greasy, non-stick quality, while the bismuth tribromophenate provides a low-level antimicrobial effect that helps reduce bacterial buildup on the wound surface. The bismuth compound is also what gives the gauze its characteristic yellowish tint and faint medicinal smell.
How It Works on a Wound
The petroleum base creates a moist barrier over the wound, which serves two key functions. First, it prevents the gauze from bonding to the raw tissue underneath, so removing the dressing later doesn’t tear away new skin cells trying to grow. Second, the moist environment supports the body’s natural healing process, since wounds that dry out tend to heal more slowly and scar more.
The bismuth tribromophenate adds a layer of antimicrobial protection, though it’s considered mild compared to stronger options like silver-based dressings. It helps minimize bacterial colonization at the wound surface rather than aggressively killing bacteria the way some prescription wound treatments do.
Common Uses
Xeroform is a staple in burn care and skin graft management. In one clinical study, a single layer of Xeroform was placed directly over freshly applied skin grafts covering deep partial-thickness and full-thickness burn wounds, then topped with dry gauze layers. The entire dressing was left in place for five days without being disturbed, and the approach produced excellent graft survival rates with minimal nursing time.
Beyond burns and grafts, you might encounter Xeroform on:
- Minor cuts and abrasions where keeping the wound moist speeds healing
- Circumcision sites in newborns, one of its most frequent uses in hospital nurseries
- Skin biopsy sites or other small surgical wounds
- Donor sites where skin was harvested for grafting elsewhere on the body
How It’s Applied and Changed
The wound should be cleaned before the dressing is placed. Xeroform goes directly onto the wound surface, then gets covered with a secondary dressing, typically plain dry gauze, to absorb any fluid that seeps through. The secondary gauze also holds the Xeroform in place.
How often the dressing needs changing depends on the wound. For skin grafts, clinicians sometimes leave the dressing undisturbed for up to five days to avoid disrupting the graft. For other wounds, more frequent changes are common, especially if there’s significant drainage. If the dressing starts to smell or you notice increased fluid soaking through, those are signs it’s time for a change.
Iodoform Gauze: The Other Yellow Dressing
If your yellow gauze was packed into a wound cavity rather than laid flat over a surface wound, it’s likely iodoform packing rather than Xeroform. Iodoform gauze is impregnated with an iodine-based antiseptic compound and is designed specifically for filling dead space inside wounds, such as drained abscesses, cysts, or surgical cavities.
Iodoform packing sees heavy use across several specialties. ENT surgeons use it after sinus and skull base procedures. Oral surgeons apply it to dry sockets and large cyst cavities in the jaw. Neurosurgeons pack it into surgical sites after certain brain procedures. Its role is to prevent infection in deep spaces while the wound heals from the inside out, which is fundamentally different from Xeroform’s job of protecting a surface wound.
Who Should Avoid It
Xeroform is contraindicated for anyone with a known sensitivity or allergy to petroleum products or bismuth tribromophenate. People with a history of atopy (a tendency toward allergic conditions like eczema or asthma) should use it with caution, as they may be more likely to react to the bismuth compound. For iodoform gauze, iodine allergy is the primary concern.
How It Compares to Newer Dressings
Xeroform has been a clinical workhorse for decades, but it’s no longer the only option. Newer silver-based dressings, particularly nanocrystalline silver films, offer stronger and longer-lasting antimicrobial protection. In a systematic review comparing nanocrystalline silver to silver sulfadiazine cream (another common burn treatment), the silver dressing cut infection rates from about 28% down to roughly 10% and caused less pain during dressing changes. Some silver dressings only need to be changed once a week, compared to more frequent changes with traditional gauze.
Foam dressings, alginates, hydrocolloids, and hydrogels also compete with Xeroform for many wound types. Foams and alginates handle heavy wound drainage better, making them a practical choice for partial-thickness burns that produce a lot of fluid. There is no consensus on which dressing is best for every situation. Hospitals and clinics choose based on the specific wound, what’s available, cost, and clinician experience. Xeroform remains widely used because it’s inexpensive, effective for straightforward wounds, and easy to apply without specialized training.