Management of Postpartum Perineal Dehiscence

Initial Assessment and Management

The American College of Obstetricians and Gynecologists recommends performing a thorough visual inspection and digital examination of the perineal wound to assess the extent of dehiscence, presence of infection, and involvement of deeper structures including the anal sphincter 1, 2
Ensure adequate lighting and proper patient positioning before examination, as inadequate visualization can lead to misclassification of injury severity 2
Conduct a mandatory digital rectal examination to evaluate for occult anal sphincter involvement, as up to 35% of sphincter injuries are missed without rectal examination 2, 3
If concern exists for anal sphincter compromise, perform endoanal ultrasound to assess the full extent of damage to the anal sphincter complex 1, 3
Prescribe stool softeners for six weeks to achieve soft stools and prevent strain 1
Recommend sitz baths twice daily to promote comfort and tissue healing 1, 3
Provide pain control with acetaminophen and ibuprofen as primary analgesics; reserve opiates only if needed 1, 3
Apply ice packs for additional pain relief 1
Arrange follow-up within two weeks, ideally in a specialized postpartum perineal clinic 1, 2

Administer prophylactic antibiotics: first-generation cephalosporin or second-generation cephalosporin; for penicillin allergy use gentamicin plus clindamycin or metronidazole 1, 4
Perform vaginal preparation with povidone-iodine or chlorhexidine gluconate if allergic to iodine 1
Ensure regional or general anesthesia for adequate pain control and muscle relaxation 1, 3
Place Foley catheter before initiating repair 4
Repair sequentially from deep to superficial structures: rectovaginal fascia, perineal body muscles, and skin 4, 2
Use continuous non-locking subcuticular sutures rather than interrupted transcutaneous sutures, as this technique avoids damage to nerve endings and reduces pain 1, 3
Count all surgical instruments, sponges, and sutures pre- and postoperatively 1

Administer second- or third-generation cephalosporin, or metronidazole with gentamicin (or clindamycin for penicillin allergy) for adequate coverage of vaginal and bowel flora 4
Antibiotic administration is associated with decreased risk of wound infection and reduced dehiscence rates 4

Refer to a specialized postpartum perineal clinic for expert evaluation 1, 2, 3
If resuturing is performed, repair the internal anal sphincter using end-to-end technique with mattress or interrupted sutures using 3-0 delayed absorbable suture 2
Maintain Foley catheter until postoperative day 1, then perform voiding trial 2

Do not overlook occult anal sphincter injury, as failure to identify this leads to persistent symptoms and inadequate treatment 3
Do not assume all persistent pain is normal healing; new tenderness warrants thorough investigation for specific pathology 3
Do not rely solely on visual inspection; always perform digital rectal examination to detect deeper involvement 2

Up to 35 % of obstetric anal sphincter injuries are missed when a digital rectal examination is not performed, highlighting the necessity of this exam for accurate detection of occult sphincter involvement in postpartum women with episiotomy wound dehiscence. 5

Reported infection rates after episiotomy range from 0.1 % to 23.6 %, and dehiscence rates range from 0.21 % to 24.6 %, indicating a wide variability in postoperative outcomes across populations. 6
In prospective studies of obstetric anal sphincter injury (OASIS), the wound infection rate is 19.8 % and the dehiscence rate is 24.6 %, underscoring the high risk of complications when the sphincter is involved. 6