The Evolving Role of Minimally Invasive and Endoscopic Techniques in Vesicoureteral Reflux Correction

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The Evolving Role of Minimally Invasive and Endoscopic Techniques in Vesicoureteral Reflux Correction

The surgical correction of vesicoureteral reflux (VUR) has undergone a significant evolution, with a growing emphasis on minimally invasive and endoscopic techniques. While open ureteral reimplantation has a long-standing track record of success, the advantages of less invasive approaches, such as reduced pain, shorter hospital stays, and improved cosmetic outcomes, have driven their increasing adoption and refinement.

Endoscopic injection of a bulking agent, such as dextranomer/hyaluronic acid (Deflux), near the ureteral orifice has emerged as a primary minimally invasive technique for VUR correction. This procedure is typically performed under general anesthesia as an outpatient or short-stay surgery. A cystoscope (a thin, flexible tube with a camera) is inserted into the bladder through the urethra, and the bulking agent is injected into the bladder wall beneath the ureteral opening. The resulting bulge creates a submucosal tunnel, lengthening the intravesical ureter and improving the valve mechanism that prevents reflux.

Endoscopic injection offers several advantages over open surgery. It is less invasive, requiring no abdominal incisions, resulting in minimal scarring and a faster recovery. The procedure is generally well-tolerated, and most children can return to normal activities within a few days. It has become a popular first-line surgical option for lower to moderate grades of VUR in many centers.

Advances in endoscopic techniques include improvements in cystoscope design, injection needles, and the bulking agents themselves. Newer generation bulking agents may offer longer-lasting results and improved biocompatibility. Refinements in injection techniques, often guided by hydrodistension of the bladder, aim to optimize the placement and volume of the bulking agent for maximal efficacy.

Laparoscopic ureteral reimplantation represents another minimally invasive surgical approach to VUR correction. This technique involves performing the traditional open surgical repair through small incisions in the abdomen using laparoscopic instruments and a camera. While technically more complex than endoscopic injection, laparoscopic reimplantation offers the potential for similar success rates to open surgery with the benefits of reduced pain, smaller scars, and a shorter hospital stay. Its use is growing, particularly in experienced centers.

Robotic-assisted laparoscopic ureteral reimplantation is a further advancement in minimally invasive VUR surgery. The robotic platform provides surgeons with enhanced dexterity, three-dimensional visualization, and greater precision during the complex dissection and suturing required for ureteral reimplantation. This can be particularly beneficial in complex cases, such as bilateral VUR or in patients with previous abdominal surgery.

The choice between endoscopic injection and laparoscopic/robotic reimplantation depends on several factors, including the grade of VUR, the presence of anatomical abnormalities, surgeon experience, patient age, and parental preference. Endoscopic injection is often favored for lower grades of reflux as a less invasive initial surgical option. Laparoscopic or robotic reimplantation may be preferred for higher grades of reflux or in cases where endoscopic injection has failed.

Ongoing research continues to evaluate the long-term outcomes and comparative effectiveness of these different minimally invasive and endoscopic techniques. Studies comparing success rates, recurrence rates, and the incidence of complications are crucial for guiding clinical practice and informing treatment decisions. As technology advances and surgical experience grows, minimally invasive and endoscopic approaches are likely to play an increasingly significant role in the correction of vesicoureteral reflux.

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