VetMedix Case Sharing丨Application Case of High-Energy Laser Therapy in the Treatment of Postoperative Non-Healing Perianal Tumors

Introduction
In dogs, postoperative wounds from perianal tumors often show persistent exudation, with edges that are red, swollen, and everted, failing to heal normally. If left untreated, these wounds can easily be contaminated by feces, leading to perianal abscesses, and if the infection spreads, may even cause anal fistulas. Traditional treatments include repeated dressing changes, topical application of anti-inflammatory ointments, or secondary suturing. However, the perianal area is prone to fecal contamination, making wound healing slow after dressing changes. Anti-inflammatory ointments struggle to penetrate deep enough to control underlying inflammation, and secondary suturing can cause further trauma to the perianal tissues, further prolonging the healing period.

High-energy laser therapy is currently an advanced treatment method in veterinary surgery for postoperative wounds that are difficult to heal. It is safe, non-invasive, significantly effective in reducing inflammation and promoting healing, and has no obvious side effects. In recent years, it has been widely used for wound repair in sensitive areas such as the perianal region. By precisely irradiating the wound area with high-energy laser, it can penetrate the skin surface to inhibit the activity of pathogenic bacteria within the wound, reducing the risk of infection. It also promotes local blood circulation in the perianal area, delivering sufficient nutrients to the wound, while stimulating the growth of granulation tissue and accelerating the regeneration of epithelial cells at the wound edges, thereby shortening the wound healing period.

This report fully documents the use of the VetMedix veterinary laser device for the repair treatment of a non-healing postoperative wound from a perianal tumor in a dog. It demonstrates how high-energy laser therapy addresses the challenges of perianal wound healing, restoring comfort during defecation.

01 Case Presentation
Acute/Chronic: Acute
Past Medical History: None
Chief Complaint: Non-healing postoperative wound from perianal tumor

02 Diagnosis

Non-healing postoperative perianal tumor

03 VetMedix High-Energy Laser Treatment Plan
Treatment Date: 2025.6.16–2025.6.20
Treatment Course: Once-daily laser physiotherapy sessions
Treatment Plan:

• Protocol Mode: Acute–Canine–Skin–4cm
• Treatment Technique: Use the standard treatment head to irradiate the perianal area in circular motions.

Using VetMedix High-Energy Laser Therapy

04 Treatment Results

After the 2nd physiotherapy session-After the 3rd physiotherapy session-After the 5th physiotherapy session

05 Case Summary
Short-Term Recovery:
The pet suffered from a non-healing wound after perianal tumor surgery, with persistent exudation and red, swollen, hardened edges. The team at Hefei Aita Pet Hospital decided to use VetMedix high-energy laser therapy. During treatment, leveraging the high-energy precision irradiation function of the VetMedix laser device, the therapy accurately targeted the poorly healing perianal area, effectively avoiding damage to surrounding healthy tissues. It simultaneously inhibited the activity of pathogenic bacteria in the wound, effectively controlling superficial infection and reducing exudation. It promoted local blood circulation in the perianal area, delivering sufficient nutrients to the wound, while activating the growth of granulation tissue and accelerating wound repair. After 5 laser therapy sessions, the pet’s wound exudation stopped, edge redness and swelling significantly subsided, it no longer curled up or shivered during defecation, and its appetite gradually returned to pre-surgery levels.

Long-Term Follow-Up:
Upon reexamination after discharge, the pet’s perianal wound had completely healed, with smooth skin and no scarring. The perianal tissue elasticity returned to normal, with no exudation, redness, or swelling, and no wound reopening or secondary infection occurred. Daily defecation was smooth, with no signs of pain.

Conclusion
This case strongly demonstrates the significant efficacy of VetMedix small animal high-energy laser rehabilitation therapy for non-healing postoperative wounds from perianal tumors in dogs. Through its photobiomodulation (PBM) mechanism, high-energy laser acts non-invasively on difficult-to-heal postoperative perianal wound areas. It rapidly improves local microcirculation in the perianal region, delivering ample nutrients to the wound, while inhibiting the activity of pathogenic bacteria to control infection and reduce inflammation and swelling in the surrounding tissues. It also accelerates the regeneration of granulation tissue and the repair of skin epithelial cells, significantly shortening the wound healing period.

06 Hospital Introduction

Hefei Aita Pet Hospital, led by Dr. Xu Xiong, was established in 2010 and is located in Yunbin Garden, North Yihuan, Luyang District, Hefei City. It is positioned as a comprehensive pet hospital integrating medical care, boarding, and retail. For over a decade, the hospital has adhered to the principles of “public welfare first, technology-based.” It is equipped with CT, nucleic acid testing, X-ray machines, biochemical analyzers, laser therapy devices, and more, focusing on core specialties such as canine and feline internal medicine, surgery, orthopedics, oncology, and geriatric diseases. Simultaneously, it actively undertakes social responsibility by long-term providing “low-cost or free” green treatment channels for stray animals, rescuing over 1000 cases annually. In collaboration with Aunt Wei’s Rescue Station, routine surgeries like sterilization and deworming cost as low as RMB 200 per case. The hospital has successfully treated cats with cleft lip and palate and abused dogs, later sending them back to the rescue station for long-term care. It has also joined forces with the Blue Sky Rescue Team to participate in rescuing cats from deep wells and treating cats with stomatitis. Known for its professional doctors, transparent pricing, and efficient and safe sterilization surgeries, the hospital is praised by many clients as “the last pure land for dog owners in Hefei.” In the future, Aita will deepen its expertise in exotic pet diagnosis and treatment and traditional Chinese medicine rehabilitation, actively promote the of animal medical technology, guard lives with technology, and warm every furry friend with love.

Address: Rooms 109-110, Building 4, Yunbin Garden, North Yihuan, Luyang District, Hefei City
Phone: 18297953437 (Dr. Xu Xiong)