Wound Cleansing: Why Methylated Spirits Are Harmful & What to Use Instead

Methylated spirits (denatured alcohol ~95% ethanol + methanol + denatonium) are contraindicated for wound cleansing.

Cytotoxicity: Kills fibroblasts, keratinocytes, endothelial cells essential for healing.
Protein Denaturation: Coagulates tissue proteins → eschar formation, impaired granulation.
Pain & Vasoconstriction: Intense stinging; reduces local perfusion.
Systemic Toxicity: Methanol absorption (large wounds) → metabolic acidosis, optic neuropathy.
Delayed Healing: Clinical studies show prolonged epithelialization vs. saline.

Wound Type	Preferred Irrigant	Rationale
Minor abrasions/lacerations	Potable tap water (clean source) or sterile saline	Mechanical cleansing; non-toxic; cost-effective
Surgical / deep wounds	Sterile 0.9% NaCl (normal saline)	Isotonic; compatible with tissues; standard of care
Contaminated / dirty	Saline + surfactant (e.g., polysorbate) or commercial wound cleanser (pH balanced)	Reduces surface tension; debris removal
Infected (adjunct)	Antiseptic solutions (povidone-iodine 0.1–1%, chlorhexidine 0.05%, hypochlorous acid) – short contact, rinse thoroughly	Bioburden reduction; cytotoxic at full strength/prolonged

Hand hygiene; gloves.
Irrigate with 50–100 mL per cm wound length (syringe 35 mL, 18G catheter → 8–13 psi).
Gentle mechanical cleansing (gauze) if needed.
Pat dry; apply appropriate dressing.

Never use hydrogen peroxide, rubbing alcohol, betadine scrub, or antibiotic ointments routinely in open wounds. They impair healing.