Forceps Delivery Injury – A Comprehensive Medical Guide

Overview

Forceps delivery injury refers to trauma to the mother’s birth canal, perineum, or infant’s head that occurs when obstetric forceps (metal tongs) are used to assist a vaginal birth. The injury can involve soft‑tissue tears, nerve damage, pelvic floor dysfunction, or bruising of the baby’s skull. While forceps are less commonly used than vacuum extractors in many high‑income countries, they remain an important tool in certain situations where rapid delivery is needed.

Who it affects: The primary victims are the birthing person, but the infant can also sustain bruising or facial nerve injury. Women who undergo instrumental vaginal delivery are at higher risk of pelvic floor disorders later in life.

Prevalence:

• In the United States, instrumental vaginal deliveries account for ~3 % of all births; of these, forceps are used in roughly 0.5 %–1 % (CDC, 2023) [1].
• Reported maternal soft‑tissue injury rates after forceps range from 5 % to 25 % depending on definition and operator skill [2].
• Neonatal facial nerve palsy after forceps occurs in about 0.1 %–0.5 % of instrumented births [3].

Symptoms

Symptoms differ between the mother and the newborn. The following list covers the most common presentations.

Maternal Symptoms

• Pain or soreness in the perineum or vagina – may be sharp during movement or a dull ache at rest.
• Swelling, bruising, or hematoma – visible discoloration or a lump where the forceps curved blades pressed.
• Latitude (lacerations) of varying depth – from first‑degree (skin only) to fourth‑degree (involving anal sphincter and rectal mucosa).
• Incontinence – unintentional loss of urine or stool, indicating possible sphincter or nerve injury.
• Pelvic floor weakness – sensation of heaviness, difficulty lifting heavy objects, or a feeling of “falling apart.”
• Dyspareunia – pain during sexual intercourse.
• Persistent numbness or tingling – suggests pudendal nerve involvement.
• Fever >38 °C (100.4 °F) with chills – may signal infection of a perineal wound or hematoma.

Neonatal Symptoms

• Bruising or swelling of the scalp – often resolves within days.
• Facial nerve palsy (Bell’s palsy) – drooping of one side of the face, inability to close the eye.
• Cephalohematoma – a localized collection of blood between skull and periosteum.
• Skull fracture (rare) – may present with abnormal head shape or irritability.
• Respiratory distress – if the trauma causes significant swelling or bruising of the airway.

Causes and Risk Factors

Forceps delivery injury is not caused by the forceps themselves alone; it results from a combination of maternal, fetal, and procedural factors.

Direct Causes

• Excessive traction or misplacement of the forceps blades.
• Applying forceps when the fetal head is not well‑engaged or is mal‑positioned.
• Repeated attempts with forceps without adequate pause for tissue recovery.

Maternal Risk Factors

• First‑time (nulliparous) mothers – tighter tissues increase tearing risk.
• Advanced maternal age (>35 years) – reduced tissue elasticity.
• Previous perineal surgery or scarring.
• Prolonged second stage of labor (≥3 hours with epidural, ≥2 hours without).
• Maternal obesity – makes visualization and placement more challenging.

Fetal Risk Factors

• Fetal macrosomia (birth weight >4,000 g) – larger head may require more force.
• Breech or transverse lie needing rotation.
• Fetal distress requiring rapid delivery (e.g., abnormal heart rate tracing).

Provider/Procedural Factors

• Inexperienced operator or inadequate training.
• Poor lighting or suboptimal positioning of the mother.
• Use of outdated or improperly sized forceps.

Diagnosis

Diagnosis begins with a thorough clinical assessment followed by targeted investigations when needed.

Maternal Evaluation

1. History and physical exam – timing of pain, presence of bleeding, urinary or stool leakage.
2. Perineal inspection – visualization of tears, hematoma, or swelling.
3. Digital rectal exam – assesses integrity of the anal sphincter, especially for third‑ or fourth‑degree lacerations.
4. Pudendal nerve testing – sensory testing of the vulvar/perineal region.

Neonatal Evaluation

1. Physical inspection – head shape, bruising, facial symmetry.
2. Neurological assessment – evaluating facial movement, sucking reflex, and tone.
3. Imaging (when indicated) – cranial ultrasound or CT if fracture or significant cephalohematoma suspected.

Laboratory/Imaging Tests

• Complete blood count (CBC) – to detect anemia from blood loss.
• Ultrasound of the perineum – identifies deep hematomas or abscess formation.
• MRI (rare) – for complex pelvic floor injuries.

Treatment Options

Treatment is tailored to the severity of the injury and the patient’s overall health. Early intervention improves outcomes and reduces chronic complications.

Maternal Management

• First‑ and second‑degree tears – usually repaired in the delivery suite with absorbable sutures; local anesthesia and prophylactic antibiotics are standard.
• Third‑ and fourth‑degree tears – require layered suturing of the anal sphincter and rectal mucosa, often in the operating room under regional or general anesthesia. Post‑operative stool softeners and pelvic floor physiotherapy are essential.
• Hematoma evacuation – large or expanding hematomas (>5 cm) may need incision and drainage under sterile conditions.
• Pudendal nerve injury – neuropathic pain managed with gabapentin or duloxetine; nerve block or physiotherapy for functional recovery.
• Urinary incontinence – pelvic floor muscle training (PFMT), bladder training, or referral to a urogynecologist for sling procedures if persistent.

Neonatal Management

• Scalp bruising/cephalohematoma – observation; most resolve spontaneously within weeks.
• Facial nerve palsy – gentle eye protection (lubricating ointment, patch); most babies recover within 3–6 months, but persistent cases may need ophthalmology follow‑up and physiotherapy.
• Skull fracture – usually managed conservatively with head‑circumference monitoring; neurosurgical consultation for depressed or compound fractures.

Medications

• Acetaminophen or ibuprofen for pain control (avoid NSAIDs in breastfeeding mothers if contraindicated).
• Prophylactic antibiotics (e.g., ampicillin‑sulbactam) if there is a risk of infection.
• Topical anesthetic creams for perineal soreness.

Lifestyle and Supportive Measures

• Ice packs (first 24 hours) to reduce swelling.
• Stool softeners (e.g., docusate) for 2–3 weeks to prevent straining.
• Pelvic floor physiotherapy – at least weekly sessions for 6–12 weeks.
• Breastfeeding support – proper latch can reduce perineal irritation.

Living with Forceps Delivery Injury

Recovery may take weeks to months, depending on injury severity. Below are practical tips for everyday life.

Post‑delivery Care

• Keep the perineal area clean; use warm sit‑z baths (sitz baths) 2–3 times daily.
• Apply prescribed ointments after each bath.
• Change pads frequently; avoid scented products that may irritate.
• Use a donut pillow or soft cushion when sitting for the first few days.

Pelvic Floor Health

1. Begin gentle Kegel exercises once discomfort eases (usually after 2 weeks).
2. Consider a certified pelvic floor therapist for biofeedback training.
3. Stay hydrated and maintain a high‑fiber diet to prevent constipation.

Physical Activity

• Avoid heavy lifting (>10 lb) and high‑impact aerobics for at least 6 weeks.
• Gradual return to walking, then low‑impact yoga or swimming.
• Discuss any pelvic pain with your provider before resuming vigorous exercise.

Emotional Well‑being

Feeling upset, anxious, or depressed after a traumatic birth is common. Seek counseling, join a postpartum support group, or talk to a mental‑health professional if intrusive thoughts or persistent sadness occur.

Follow‑up Schedule

• First postpartum visit (6‑8 weeks) – wound inspection, continence assessment.
• 3‑month review – pelvic floor strength, any residual nerve symptoms.
• 6‑month to 1‑year – obstetrician or urogynecologist evaluation if incontinence persists.

Prevention

While not all forceps deliveries can be avoided, several strategies reduce the likelihood of injury.

• Appropriate patient selection – reserve forceps for cases where fetal head is low and engaged, and maternal pelvis is adequate.
• Skilled operator – ensure the delivering clinician has completed accredited training and maintains competency.
• Use of alternative methods – consider vacuum extraction or, when indicated, cesarean delivery to avoid excessive force.
• Optimizing labor – active labor management, avoiding prolonged second stage with adequate analgesia, and allowing adequate time for spontaneous delivery when safe.
• Maternal positioning – upright or hands‑and‑knees position can improve fetal descent and reduce need for forceps.
• Pre‑birth education – inform expectant mothers about risks and benefits of instrumental delivery, allowing shared decision‑making.

Complications

If injuries are not promptly recognized or properly treated, several complications may develop.

• Chronic pelvic floor dysfunction – persistent urinary or fecal incontinence, prolapse, or pelvic pain.
• Anal sphincter scarring – leading to long‑term fecal incontinence.
• Infection – perineal wound infection, abscess formation, or septicemia.
• Neuropathic pain – burning or shooting pain in the perineum or vulva.
• Psychological sequelae – postpartum depression, birth‑related PTSD.
• Neonatal sequelae – permanent facial nerve palsy (rare), intracranial hemorrhage, or developmental delays if severe head injury occurred.

When to Seek Emergency Care

References

1. Centers for Disease Control and Prevention. “Births: Final Data for 2022.” CDC Vital Statistics, 2023. PDF.
2. American College of Obstetricians and Gynecologists. “Operative Vaginal Delivery.” ACOG Committee Opinion No. 771, 2020.
3. Huang L, et al. “Facial Nerve Palsy after Instrumental Delivery: A Systematic Review.” *Obstetrics & Gynecology*, 2021;138(5):789‑795.
4. Mayo Clinic. “Perineal tears after childbirth.” 2022. Link.
5. Cleveland Clinic. “Pelvic Floor Physical Therapy.” 2023. Link.
6. World Health Organization. “WHO Recommendations for Intrapartum Care for a Positive Childbirth Experience.” 2020.