Perineal Hernia Repair

Perineal hernias do not resolve on their own and generally worsen with time. The most urgent indication for surgery is bladder entrapment — when the bladder displaces into the hernia, the urethra kinks and the dog cannot urinate, creating a life-threatening emergency. Even without bladder involvement, straining to defecate is painful and persistent, and constipation from rectal deviation can become severe. Early repair is preferable because the muscles are easier to reconstruct before they have undergone significant atrophy. Concurrent neutering removes the testosterone-driven influence on the perineal musculature that initially contributes to the hernia's development.

Perineal hernia repair is performed under general anesthesia with the patient positioned to allow perineal access. Key steps include:

• Any herniated organs — most critically the bladder — are carefully reduced (repositioned) back into the abdominal cavity
• The defect in the pelvic diaphragm is identified; the hernia sac is excised or inverted
• The damaged muscles are sutured together using durable suture material; where muscle tissue is insufficient, the internal obturator muscle is transposed (rotated) across the gap as a reinforcing flap
• A colopexy (internal colon tacking) is often added to prevent rectal displacement
• The tissues are closed in layers; castration is completed through a separate scrotal incision if not previously performed

Bilateral hernias may be repaired simultaneously or staged, depending on the patient's condition and the degree of bilateral muscle loss.

Pre-operative imaging — abdominal radiographs and ultrasound — confirms which organs are displaced and checks bladder position. If the bladder is entrapped and the dog cannot urinate, a urinary catheter or cystocentesis (needle drainage of the bladder) is performed before surgery as an emergency measure. Standard pre-anesthetic bloodwork is required. Food is withheld twelve to twenty-four hours before surgery; an enema clears fecal material from the rectum to reduce contamination during repair. Dogs that have been straining for an extended period may receive IV fluids before anesthesia to correct dehydration.

Hospital stay is typically two to three days. At-home recovery follows a predictable course:

• Days 1–7: pain medication; stool softeners to prevent straining on the repair; e-collar; restricted activity
• Weeks 1–3: soft diet continued; incision monitored for swelling or discharge; urination and defecation tracked
• Week 2–3: suture recheck; once healing is confirmed, diet and activity return to normal gradually

Most dogs resume comfortable defecation and urination within a few days of surgery. Hernia recurrence is possible (reported in roughly 10–20% of cases depending on technique and tissue quality), so following the post-operative plan closely, maintaining a healthy weight, and returning for all recheck appointments are important.

Potential complications include wound infection, seroma, recurrence of the hernia, rectal deviation, urinary tract infection following catheterization, sciatic nerve injury (due to anatomic proximity during internal obturator transposition), and — rarely — fecal incontinence. Bladder entrapment cases carry additional urgency-related risk if the bladder has been devitalized. The recurrence rate is lower with obturator transposition than with primary muscle closure alone, which is why transposition is the preferred technique at our hospital. All risks specific to each patient's anatomy and health status are reviewed before surgery.