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Perineal Repair

Introduction and Indications for Perineal Repair

Perineal trauma is one of the most common physical consequences of vaginal childbirth. It occurs either spontaneously as the fetal head and shoulders stretch and tear the tissues, or intentionally through an episiotomy. The primary goal of perineal repair is to restore the normal anatomical alignment of the pelvic floor, promote primary wound healing, achieve good hemostasis, and preserve long-term functional outcomes such as urinary, bowel, and sexual health.

Not every tear requires suturing. Small, superficial first-degree tears that are not bleeding heavily and show no gaping of the wound edges may be left to heal naturally, as spontaneous healing can sometimes result in less short-term pain than suturing. However, any tear involving the deeper muscles of the perineum, or any tear that is actively bleeding or distorted, requires prompt surgical repair under appropriate anesthesia.

Anatomical Layers of the Perineum

A successful repair depends entirely on a clear mental map of the pelvic floor structures. Midwives must identify three distinct tissue planes:

  1. Vaginal Mucosa and Submucosa: The innermost layer lining the birth canal. It must be closed first to restore the apex of the vaginal wound.
  2. Perineal Muscles: This includes the transverse perineal muscles, the bulbospongiosus, and part of the puborectalis component of the levator ani. Reapproximating these muscles is crucial for restoring pelvic floor support and preventing future prolapse or incontinence.
  3. Skin and Subcutaneous Fat: The outermost layer, closed using a continuous subcuticular or interrupted technique to ensure good cosmetic and comfort outcomes.

Grading Perineal Tears

Accurate classification of trauma dictates the management plan and determines whether the patient can be managed in the labor ward or needs theatre support.

GradeDescriptionManagement
First DegreeInjury to vaginal mucosa or perineal skin only.Suture if gaping or bleeding; may leave alone if superficial.
Second DegreeInjury to perineum involving vaginal mucosa and muscle, but NOT the anal sphincter.Standard labor ward repair using absorbable sutures.
Third DegreeInjury to perineum involving the anal sphincter complex.Requires senior clinician or medical officer, often in an operating theatre.
Fourth DegreeInjury to perineum involving the anal sphincter and the rectal mucosa.Requires immediate referral and surgical repair in the operating theatre.

Preparation, Instruments, and Local Anesthesia

Before touching the tissue with a needle, the midwife must ensure optimal visualization and patient comfort. Position the woman comfortably in the dorsal lithotomy position with adequate lighting. Clean the area gently with sterile water or antiseptic.

Infiltration of local anesthetic—typically 1% or 2% lignocaine (lidocaine)—is mandatory unless an effective epidural is running. Aspirate before injecting to avoid intravascular administration. Allow three to five minutes for the anesthetic to take full effect before testing the area with a gentle pinch.

Essential instruments include a needle holder, dissecting forceps (toothed), curved surgical scissors, and a sterile tray. Always count swabs and instruments before and after the procedure.

Step-by-Step Perineal Repair Technique

The standard approach uses a synthetic absorbable suture such as polyglactin 910 (Vicryl Rapid).

Post-Procedure Care and Pain Management

Comprehensive care continues long after the final knot is tied. Document the procedure clearly, noting the type of tear, materials used, and needle/swab counts.

Analgesia should be proactive. Regular oral paracetamol and ibuprofen provide excellent baseline pain relief for most women. Ice packs applied to the perineum during the first 24 hours significantly reduce local edema and discomfort.

Encourage early mobilization, adequate hydration, and high-fiber nutrition to prevent constipation, which can strain the fresh repair. Advise the woman on proper hygiene, including daily washing with clean water and changing sanitary pads frequently. Instruct her on warning signs of infection such as worsening pain, foul-smelling discharge, or fever.

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