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Aminolevulinic acid photodynamic therapy

Dermatology & Aesthetics estimated about CNY 2000-5000

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Description

A medical treatment for acne vulgaris using topical aminolevulinic acid followed by visible light exposure to induce selective phototoxicity in sebaceous glands and P. acnes.

Main Uses

Primary clinical use is the treatment of moderate-to-severe inflammatory acne vulgaris (especially recalcitrant to conventional therapy). Also used off-label for acne scarring improvement, sebaceous gland modulation, and adjunctive management of rosacea-associated papulopustules and actinic keratosis. Indicated when patients desire non-antibiotic, non-hormonal options or have contraindications to isotretinoin.

Normal Range

ALA-PDT is not a diagnostic laboratory test with numerical 'normal ranges'; it is a therapeutic photodynamic procedure. No quantitative biomarkers or reference values (e.g., mg/dL, IU/mL) are measured before or during treatment. Clinical efficacy is assessed qualitatively via lesion count reduction (>50% decrease in inflammatory acne lesions after 3–4 sessions), physician global assessment (PGA), and patient-reported outcomes.

Low Values - Possible Causes

N/A — ALA-PDT does not yield 'low values' as it is not a quantitative assay. Suboptimal clinical response (e.g., <30% lesion reduction) may result from inadequate ALA penetration, insufficient light dose (J/cm²), poor patient compliance with pre-treatment sun avoidance, epidermal barrier dysfunction limiting protoporphyrin IX (PpIX) accumulation, or use of topical antioxidants that quench reactive oxygen species.

High Values - Possible Causes

N/A — ALA-PDT does not produce 'high values'. Excessive treatment intensity (e.g., high ALA concentration, prolonged incubation >3 hours, or excessive light fluence >120 J/cm²) may cause adverse effects including severe erythema, edema, crusting, blistering, or dyspigmentation—but these are not 'high values' of a measurable parameter.

photodynamic therapy acne treatment

estimated about CNY 2000-5000