This study aims to investigate whether specialized red-blue light irradiation facilitates faster postoperative recovery and reduces complication rates in patients following perianal abscess surgery. A total of 222 eligible patients were randomly allocated equally into three groups (74 per group):①Routine Care Group: Standard wound care including cleansing and dressing changes；②Red Light Therapy Group: Routine care plus red light phototherapy；③Combined Red-Blue Light Therapy Group: Routine care plus concurrent red and blue light phototherapy.Wound healing time and incidence of complications were compared to assess postoperative recovery across interventions. The primary hypothesis posits that adjunctive phototherapy-particularly combined red-blue light irradiation-will significantly enhance wound healing, reduce edema and pain, and decrease complication rates (e.g.bleeding, urinary retention) compared to routine care alone.
Aged between 18 and 75 years;
Clinical diagnosis of perianal abscess；
Procedure: Radical resection with incision and drainage.
Concurrent anorectal disorders (hemorrhoids, anal fissure) or malignancies/infectious diseases；
History of psychiatric disorders；
Analgesic use within 7 days preoperatively；
Coagulopathy or cardiac/hepatic dysfunction；
Parallel
Red light exposure
DevicePatients in the red light group received red light therapy concurrently with standard care.
Red-blue light exposure
DevicePatients in the red and blue light group received combined red and blue light therapy concurrently with standard care。
Wound healing time
Defined as 100% re-epithelialization assessed by blinded evaluator.
Postoperative pain intensity
Assessed at rest and during defecation.Numerical Rating Scale will be used,patients are asked to choose a whole number (integer) from 0 to 10 that best describes their pain.0 usually means "no pain."10 means "the worst pain imaginable."
Peripheral tissue edema（Grade 0-3）
* Grade 0 (None): No edema. * Grade 1 (Mild): Mild edema with slight swelling around the incision; skin folds remain clearly visible. * Grade 2 (Moderate): Moderate edema with pronounced swelling around the incision; skin folds are indistinct. * Grade 3 (Severe): Severe edema with marked swelling around the incision; skin folds are obliterated.
Assessment of Granulation Tissue in Wound Bed
* Grade 0 (Absent): No granulation tissue present. * Grade 1 (Poor): Minimal, pale, and friable granulation tissue with easy bleeding. * Grade 2 (Fair): Moderate amount of granulation tissue; pinkish-red in color but remains somewhat friable. * Grade 3 (Good): Healthy, abundant granulation tissue filling the wound bed; beefy red in color and firm to the touch, with minimal bleeding.
Length of hospital stay
Measured in hours with standardized discharge criteria.
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