How is cystolitholapaxy combined with transurethral incision of the prostate performed to treat a bladder stone and outlet obstruction?

Combined Cystolitholapaxy with Transurethral Incision of the Prostate (TUIP)

This is a simultaneous endoscopic procedure where bladder stones are fragmented and removed (cystolitholapaxy) while the prostate is incised at the bladder neck (TUIP) to relieve outlet obstruction—both performed in a single operative session through the urethra.

Procedural Overview

The operation combines two distinct interventions:

Cystolitholapaxy Component

• Stone fragmentation using holmium laser, pneumatic lithotripsy, or specialized stone removal systems
• Stone extraction through continuous irrigation and retrieval devices
• Performed transurethrally with a cystoscope or resectoscope
• Can effectively treat stones of variable sizes, though larger stones (>2.5 cm) require more operative time 1

TUIP Component

• One or two incisions made at the bladder neck/prostatic urethra (typically at 5 and 7 o'clock positions)
• Cuts through prostatic tissue and capsule to widen the outlet
• Indicated specifically for prostates ≤30g 2
• Uses electrocautery or laser energy for hemostatic incision

Clinical Rationale

The decision to combine these procedures versus performing stone removal alone is NOT automatic and should be based on specific clinical parameters—not simply the presence of a stone.

When Combined Surgery Is Justified 3, 4, 5

Perform simultaneous outlet surgery when patients demonstrate:

• Prostate volume >100 mL
• Post-void residual (PVR) >90 mL (strong predictor of medical therapy failure)
• Qmax <10 ml/s with obstructive symptom predominance
• IPSS >16 with impaired quality of life (QoL score >4)
• Age <74 years with low comorbidity
• Catheter-dependent retention or recurrent acute retention
• Documented bladder outlet obstruction on urodynamics (BOO index >47.6)

When Stone Removal Alone May Suffice 4, 5

Consider isolated cystolitholapaxy with postoperative re-evaluation when:

• Smaller prostate volumes (<30-50g)
• Lower PVR (<90 mL)
• Mild-to-moderate LUTS (IPSS <16)
• Patient preference to avoid ejaculatory dysfunction
• Up to 77% of patients managed with stone removal alone remain free of BPH surgery at 3 years 5

Comparative Outcomes

Combined Procedure Advantages 3, 6

• Lower stone recurrence (≤5% vs 10-25% with stone removal alone)
• Greater LUTS improvement (more pronounced IPSS reduction, better Qmax)
• Definitive treatment of both pathologies in single session
• Stone-free rates >90% achievable with modern techniques

Combined Procedure Disadvantages 4, 5

• Higher early morbidity (31% overall complications vs 13% with stone removal alone)
• Higher major complication rates (5% vs 0%)
• Guaranteed ejaculatory dysfunction with TURP/TUIP (18.2% retrograde ejaculation with TUIP vs 65.4% with TURP) 2
• Potential overtreatment in patients without significant obstruction

Technical Considerations

Operative Sequence 1, 6

1. Cystoscopy to assess stone burden, bladder trabeculation, and prostatic anatomy
2. Stone fragmentation using holmium laser (most versatile—fragments all stone compositions and provides hemostatic tissue cutting)
3. Stone extraction with continuous flow systems
4. TUIP performed after stone clearance confirmed
5. Hemostasis achieved with laser or electrocautery
6. Catheter placement (typically 24-48 hours)

Equipment Options

• Holmium laser enables both lithotripsy and prostatic incision with minimal bleeding 6
• Specialized stone removal systems (e.g., AH-1 SRS) can reduce operative time for large stones 1, 7
• Bipolar energy preferred for hemostasis in anticoagulated patients

Critical Pitfalls to Avoid

1. Do not assume stone presence equals obstruction requiring outlet surgery—this lacks physiologic validation 4

2. Do not use prostate size alone as surgical indication—functional parameters (PVR, Qmax, BOO index) are superior predictors 8

3. Avoid combined surgery in patients with:

   • Predominant nocturia/OAB symptoms (poor surgical outcomes)
   • Neurological conditions affecting bladder function
   • Detrusor underactivity without documented obstruction
   • Previous prostate surgery (case-by-case basis only) 8

4. Consider urodynamics when clinical picture is unclear—particularly with PVR >90 mL but equivocal symptoms 8

Patient Counseling Requirements

Inform patients that 2, 5:

• Sexual function: TUIP causes retrograde ejaculation in 18.2% (lower than TURP's 65.4%) and may worsen erectile dysfunction
• Stone recurrence: 10-25% if outlet not addressed, but most won't require subsequent prostate surgery
• Symptom improvement: Combined surgery produces greater LUTS reduction but with higher complication risk
• Alternative strategy: Stone removal with postoperative medical therapy (tamsulosin + finasteride) is viable for selected patients

Modern Evidence Challenges Traditional Dogma

Recent high-quality evidence 4, 5 demonstrates that routine simultaneous outlet surgery for all men with bladder stones is not evidence-based. The 2026 scoping review from EAU Endourology explicitly challenges this traditional approach, showing that selective management based on obstruction severity—not stone presence—offers a more physiologic strategy while avoiding overtreatment.