Presented by:
Emily Yang
Affiliations:
UBC OBGYN
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What is Laparoscopic Repair of a Cesarean Scar Defect?
Laparoscopic repair of a cesarean scar defect, or isthmocele, is a minimally invasive procedure used to reconstruct an incompletely healed cesarean section scar in the lower uterine segment. It may be considered for patients with symptoms such as abnormal uterine bleeding, pelvic pain, or secondary infertility, particularly when the remaining myometrium is thin or previous hysteroscopic treatment has not resolved the defect. Here’s what it involves:
- Preoperative Assessment: Ultrasound or other imaging is used to evaluate the size of the defect, residual myometrial thickness, symptoms, and future fertility goals.
- Laparoscopic Assessment: The pelvis and lower uterine segment are inspected to identify the previous cesarean scar and surrounding anatomy.
- Bladder Dissection: The bladder is carefully separated from the lower uterus to expose the cesarean scar defect and provide sufficient space for reconstruction.
- Hysteroscopic Guidance: A hysteroscope is used to visualize the defect from inside the uterine cavity and help the surgeon accurately identify its location and boundaries laparoscopically.
- Defect Excision: Fibrotic and poorly healed tissue is excised until healthy myometrial margins are reached.
- Layered Uterine Closure: The uterine defect is reconstructed in layers using laparoscopic suturing techniques, such as sliding knots, to restore myometrial thickness and uterine integrity.
- Hysteroscopic Confirmation: Hysteroscopy is used during and after reconstruction to confirm appropriate orientation, complete excision, and restoration of the uterine cavity.
- Final Inspection: The repaired lower uterine segment and surrounding structures are inspected for bleeding or injury before completing the procedure.
Laparoscopic repair allows full-thickness reconstruction of the cesarean scar and may be an option for persistently symptomatic patients when previous hysteroscopic remodeling has been unsuccessful.
What are the Risks of Laparoscopic Repair of a Cesarean Scar Defect?
Cesarean scar repair can be technically challenging because the defect is located in the lower uterine segment close to the bladder, ureters, and pelvic blood vessels.
- Bladder Injury: Previous cesarean deliveries can cause the bladder to become adherent to the lower uterus, increasing the risk of injury during dissection.
- Bleeding: Excision of scar tissue and reconstruction of the vascular uterine muscle can result in significant bleeding.
- Uterine Perforation: Hysteroscopic instrumentation or dissection through a thin residual myometrium can result in unintended perforation.
- Ureteral Injury: Extensive lateral dissection near the lower uterine segment can potentially place the ureters at risk.
- Incomplete Repair or Persistent Defect: The scar may not heal completely following reconstruction, and a residual or recurrent defect can remain.
- Persistent Symptoms: Abnormal bleeding, pelvic pain, or infertility may not completely resolve despite successful anatomical repair.
- Infection: Endometritis, pelvic infection, or infection involving the surgical repair can occur following surgery.
- Intrauterine Adhesions: Manipulation of the uterine cavity and scar may result in adhesion formation that can potentially affect fertility.
- Future Pregnancy Complications: A reconstructed cesarean scar requires consideration during future pregnancies because of potential risks involving scar integrity and abnormal placental implantation.
- Need for Additional Surgery: Persistent symptoms, unsuccessful healing, significant bleeding, or other complications may require further treatment.
- General Surgical Risks: Blood clots, anesthesia-related complications, wound problems, and injury to surrounding pelvic structures are possible.
Careful preoperative assessment, precise hysteroscopic localization, meticulous bladder dissection, complete excision of poorly healed tissue, and layered uterine reconstruction help minimize these risks and restore the integrity of the cesarean scar.