In a pediatric patient with possible neurogenic bladder and bladder spasm, is placing a double‑J ureteral stent prior to retrograde intrarenal surgery contraindicated?

Pre-Stenting in Pediatric Neurogenic Bladder Prior to RIRS: Not Contraindicated, But Requires Careful Risk-Benefit Assessment

Placing a double-J stent prior to retrograde intrarenal surgery in a pediatric patient with possible neurogenic bladder and bladder spasm is not contraindicated, but routine pre-stenting should be avoided unless there are specific anatomical challenges that would prevent initial ureteroscopic access. 1

Key Guideline Recommendations

The AUA/Endourological Society guidelines explicitly state that clinicians should not routinely place a stent prior to URS in pediatric patients 1. This recommendation is based on expert opinion noting that:

• Access to the upper tract is possible on the initial attempt in the majority of children undergoing URS
• Pre-stenting should only be considered when access is difficult or impossible due to narrow ureterovesical junction and/or ureter
• When placed, the stent results in passive dilation, permitting access at the next attempted procedure

The EAU guidelines similarly note that URS has no specific contraindications aside from general anesthesia risks and untreated UTIs 2.

Special Considerations for Neurogenic Bladder

The presence of neurogenic bladder with bladder spasm adds complexity but does not create an absolute contraindication:

Infection Risk

• Neurogenic bladder patients have significantly higher risk of urinary tract infections when stents are placed 3
• In a pediatric transplant study, all 3 patients who developed early UTI with stents had neurogenic bladder requiring clean intermittent catheterization 3
• Pre-stenting before RIRS increases postoperative infection risk, with the lowest infection rates occurring when surgery is performed within 2 weeks (ideally within 20 days) of stent placement 4

Bladder Spasm Concerns

• Bladder spasm may increase stent-related symptoms (foreign body sensation, urinary incontinence, dysuria) 5
• However, stent placement itself is not contraindicated in neurogenic bladder; rather, the underlying bladder dysfunction complicates management 3
• Smaller caliber stents (4.8F vs 6F) demonstrate better quality of life and fewer lower urinary tract symptoms without compromising success 6

Clinical Decision Algorithm

When to AVOID routine pre-stenting:

• Normal ureteral anatomy expected
• No prior failed access attempts
• First-time procedure
• Goal: minimize infection risk and avoid unnecessary procedures 1, 4

When to CONSIDER pre-stenting:

• Previous failed ureteroscopic access
• Known narrow ureterovesical junction or ureter
• Severe anatomical abnormalities (e.g., severe scoliosis, history of ureteral reimplantation) 1
• Large, impacted proximal ureteral stones 7

If pre-stenting is performed in neurogenic bladder:

• Use smallest caliber stent feasible (4.8F preferred over 6F) 6
• Perform definitive RIRS within 15-20 days maximum to minimize infection risk 4
• Ensure adequate bladder emptying (clean intermittent catheterization if needed) 3
• Consider prophylactic antibiotics given higher infection risk 3
• Monitor closely for UTI symptoms

Important Caveats

Common Pitfalls to Avoid:

1. Do not routinely pre-stent based solely on stone disease—this increases costs, morbidity, and infection risk without improving stone-free rates 8, 9
2. Do not leave stents in place for prolonged periods before RIRS—infection risk increases significantly after 2 weeks 4
3. Do not ignore bladder emptying function—neurogenic bladder patients with incomplete emptying have substantially higher infection rates with stents 3

Contradictory Evidence Note:

While some studies show pre-stenting facilitates UAS insertion 4, the AUA guidelines prioritize avoiding routine pre-stenting in pediatrics due to high initial access success rates 1. The presence of neurogenic bladder shifts this balance slightly toward selective pre-stenting only when anatomical concerns are documented.

In summary: proceed directly to RIRS without pre-stenting unless there are documented anatomical barriers to access. If pre-stenting is necessary, use the smallest caliber stent, ensure adequate bladder drainage, and perform definitive surgery within 2-3 weeks maximum.