Hysteroscopy-guided laparoscopic resection of a cesarean scar defect in 5 steps: the usefulness of nonperfusion hysteroscopy

To demonstrate a 5-step approach to accurately identify the extent of resection of a cesarean scar defect (CSD) and perform excision and repair of the lesion.Technical video introducing laparoscopic scar repair using nonperfusion hysteroscopy for patients with a CSD.Tertiary referral facility for gynecology.A 33-year-old woman who underwent intrauterine insemination for secondary infertility 3 times but did not conceive complained of repeated irregular bleeding caused by a CSD during infertility treatment.This video presents a systematic 5-step approach to laparoscopic repair of a CSD. Step 1: the lesion was coagulated and marked using a hysteroscope. Step 2: the lesion was thinned by cutting it using the hysteroscope. Step 3: after laparoscopic dissection of the bladder from the lower uterine segment and turning off the laparoscope's light source, the thinned lesion could be identified using light from the hysteroscope. Step 4: an incision was made at the lit-up point from the abdominal cavity side using an ultrasonic coagulation incision device to access the uterus. Step 5: once the uterine lumen was reached, reflux from the hysteroscope was stopped. Intraperitoneal insufflation gas then flowed into the uterus through the uterine wall perforation, and the lesion could be observed without the use of a reflux fluid. This technique is called nonperfusion hysteroscopy. By observing the marked lesion using nonperfusion hysteroscopy, it could be resected laparoscopically along the appropriate incision line.Advantage of performing 5 successive surgical steps to completely resect a CSD using laparoscopic repair and resolve the patient's symptoms.Laparoscopic repair using nonperfusion hysteroscopy allowed recognition of the upper and lower edges of the lesion from the abdominal cavity side.The combined use of nonperfusion hysteroscopy allows observation of the uterine lumen without the use of a reflux fluid because pneumoperitoneum gas fills the uterine lumen. Intraoperative monitoring using a hysteroscope and laparoscope allows visualization of the lesion site from both sides while resection is being performed. This 5-step procedure permits precise identification of the lesion area, complete removal of lesions, and prevention of excessive resection that may reduce uterine function and increase perinatal risk.