Is it appropriate to use Anasept gel (chlorhexidine) on a heel wound with exposed bone?

Anasept Gel Should NOT Be Used on Heel Wounds with Bone Exposure

Do not use Anasept gel (or any chlorhexidine-containing antiseptic) on heel wounds with exposed bone, as chlorhexidine is toxic to osteoblasts and impairs wound healing when applied to open wounds with bone exposure.

Why Chlorhexidine Is Contraindicated for Wounds with Bone Exposure

Direct Osteoblast Toxicity

• Chlorhexidine at clinically used concentrations (0.1%) causes significant osteoblast cell death and structural damage 1
• Research demonstrates that both chlorhexidine and similar antiseptics promote lactate dehydrogenase (LDH) release and significantly decrease viable osteoblasts after exposure 1
• The authors of this osteoblast toxicity study explicitly recommend "cautious use of polyhexanide and chlorhexidine in septic surgery to avoid severe osteoblast toxicity" 1

Impaired Wound Healing in Bone-Exposed Wounds

• Animal studies show that increasing concentrations of chlorhexidine cause delayed wound healing, particularly problematic when bone is exposed 2
• Intensive rinsing with chlorhexidine on wounds where bone is exposed results in "delay and disturbance of wound healing" 2
• The study specifically notes that wounds with exposed bone are at highest risk for healing complications with chlorhexidine use 2

General Antiseptic Toxicity to Open Wounds

• Antiseptics including chlorhexidine have been shown to be toxic to healing tissue and should not be used on open wounds 3
• While chlorhexidine is appropriate for intact skin preparation before surgery, it is contraindicated once wounds are open 3

What to Use Instead

Appropriate Wound Cleansing

• Use sterile normal saline for wound irrigation - this is the standard recommendation for wound cleansing without the cytotoxic effects of antiseptics 4
• Avoid iodine- or antibiotic-containing irrigation solutions for deep wounds 4

Topical Antibiotic Ointments

• Topical antibiotic ointments (such as Polysporin or bacitracin) are safe for open wounds, prevent infection, and promote healing by maintaining a moist wound environment 3
• Unlike antiseptics, topical antibiotics are not toxic to healing tissue 3

Systemic Antibiotics for Infected Wounds with Bone Involvement

• For heel wounds with bone exposure and signs of infection, systemic antibiotics are essential 4
• If osteomyelitis is suspected or confirmed, prolonged antibiotic therapy (4-6 weeks) is required 4
• Surgical debridement of infected, non-viable tissue may be necessary 4

Additional Critical Considerations

FDA Labeling Limitations

• Note that Anasept gel is labeled as an "antiseptic, hand sanitizer" with directions for hand application until dry 5
• The FDA labeling does not support use on open wounds, particularly those with bone exposure 5

Wound Management Priorities

• Offloading is essential for heel wounds - use appropriate devices such as removable knee-high offloading walkers 4
• Maintain moist wound environment with appropriate dressings rather than antiseptics 3
• Ensure adequate perfusion assessment (toe pressures, ankle-brachial index) as ischemia impairs healing 4