Wound Bed Preparation and Debridement Methods
Wound bed preparation
The T.I.M.E. framework organizes care: Tissue that is nonviable must be removed; Infection and inflammation controlled; Moisture balanced; Edges assessed for non-advancement (senescence, callus, undermining). The goal is a clean, perfused, moist bed with advancing edges; debridement is a means, not an end.
Debridement methods
- Sharp/surgical: fastest and selective; requires training, hemostasis, and adequate perfusion.
- Autolytic: the body's own enzymes under an occlusive dressing; slow, selective, comfortable, and useful for palliative or fragile patients.
- Enzymatic: collagenase is selective but needs a moist environment; heavy-metal antiseptics and some silver products can inactivate it.
- Mechanical: wet-to-dry gauze is non-selective, painful, and no longer recommended; monofilament pads and hydrotherapy are gentler options.
- Larval: fast and selective; avoid near exposed vessels or when bleeding risk is uncontrolled.
Perfusion first
Never debride an ischemic limb without revascularization planning. A stable, dry, intact eschar on a heel with severe arterial disease is usually left alone; a wet, infected, or draining eschar requires urgent debridement.
Traps
- Treating wet-to-dry as standard of care.
- Debriding a heel eschar in a patient with an ABI of 0.4.
- Debriding without addressing pain, anticoagulation, or platelet count.
- Calling a wound clean while biofilm persists.
Rule of thumb
Perfuse it before you debride it. A black, dry heel in a patient with absent pedal pulses and an ABI of 0.45 gets protection, moisture control, and vascular referral, not aggressive sharp debridement.