Endoscopy as an Adjunct to Image-Guided Interventions: A New Frontier in Interventional Radiology

Imaging-Guided De Novo Retrograde Ureteral Access and Stent Placement without Cystoscopy in Women

PURPOSE

To evaluate the feasibility of a new technique for imaging-guided de novo retrograde ureteral double J (DJ) stent placement without cystoscopy in women.

MATERIALS AND METHODS

Eighty-four women referred for ureteral stent placement between April 2019 and January 2022 were included. In all the patients, the initial attempt for stent placement was performed in a retrograde fashion. Successful ureteral catheterization and DJ stent placement were considered as technical success. The fluoroscopy time required to catheterize the ureter and that for the entire procedure were recorded. Factors affecting the technical success rate and fluoroscopy time were examined.

RESULTS

A total of 108 ureteral stent placement procedures in 84 women, with a mean age of 57.5 years (range, 19-85 years), were performed. The most common underlying pathologies were cervical (n = 33, 31%) and ovarian (n = 32, 30%) carcinomas. The most commonly involved segments of the ureter were the lower half (n = 44, 40%) and trigone (n = 39, 36%). The technical success rate was 81.5%, and it reached 93% in the case of lower-half ureteral obstruction. Distorted trigonal anatomy caused by external compression of the bladder wall by a mass was associated with a higher rate of technical failure (90.6% vs 47.8%; P < .001). The use of ultrasound guidance to guide the sheath to the ureteral orifice allowed for a significant decrease in the fluoroscopy time for ureteral catheterization (4.6 minutes ± 3.91 vs 2.26 minutes ± 2.32; P = .003) and that for the entire procedure (9.42 minutes ± 4.95 vs 5.93 minutes ± 4.06; P = .001).

CONCLUSIONS

Imaging-guided de novo retrograde ureteral catheterization and stent placement can be successfully performed in a high percentage of patients within a reasonable fluoroscopy time without the need for cystoscopy in women.

Percutaneous Biliary Endoscopy

Biliary endoscopy is underutilized by interventional radiologists and has the potential to become an effective adjunctive tool to help both diagnose and treat a variety of biliary pathology. This is particularly true in cases where endoscopic retrograde cholangiopancreatography fails or is not feasible due to surgically altered anatomy. Both preoperative clinical and technical procedural factors must be taken into consideration prior to intervention. In this article, clinical evaluation, perioperative management, and procedural techniques for percutaneous biliary endoscopy are reviewed.