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What is Pyeloplasty (UPJ Obstruction)?
Pyeloplasty is a reconstructive surgical procedure performed to repair a Ureteropelvic Junction (UPJ) obstruction—a bottleneck where the renal pelvis meets the ureter.
When obstructed, urine backs up into the kidney, causing hydronephrosis (kidney swelling), pain, and potential kidney damage. Pyeloplasty excises the narrowed junction and reattaches healthy tissue to re-establish a wide drainage funnel.
Who Needs Pyeloplasty?
Pyeloplasty is recommended for patients with confirmed UPJ obstruction causing pain or kidney function decline.
Key clinical indicators include:
- Progressive hydronephrosis on kidney ultrasound or CT.
- Flank pain that worsens after drinking fluids (Dietl's crisis).
- Nuclear scan (DTPA/MAG3) showing impaired kidney drainage.
- Recurrent kidney infections or kidney stone formation.
- Blood in urine (hematuria).
Types of Pyeloplasty
- Dismembered Pyeloplasty (Anderson-Hynes): The gold-standard technique completely removing the narrowed junction and reshaping the renal pelvis.
- Laparoscopic Pyeloplasty: Minimally invasive keyhole approach using 3 to 4 small abdominal incisions.
- Robotic-Assisted Pyeloplasty: Advanced robotic technique providing 3D high-definition vision and wristed instruments for precise micro-suturing.
Benefits of Pyeloplasty
- Halts progressive kidney damage and preserves long-term renal function.
- Permanent relief from chronic flank pain and fluid backing up into the kidney.
- Prevention of kidney stones and recurrent infections.
- Over 95% long-term surgical success rate.
- Minimal scarring, low blood loss, and fast recovery with robotic/laparoscopic options.
What to Expect Before Surgery?
- Diagnostic Scans: CT Urogram and Nuclear Renal Scan (DTPA/MAG3) to measure drainage kinetics.
- Routine Labs: Blood count, kidney function, and urine culture.
- Medication Prep: Discontinuing blood thinners 5 to 7 days prior.
- Fasting: NPO fasting for 8 hours prior to anesthesia.
Complete Procedure
The surgical process generally follows these steps:
- Administration of general anesthesia and flank positioning.
- Creating 3 to 4 small keyhole incisions (or flank incision for open surgery).
- Exposing the kidney, renal pelvis, and obstructed UPJ junction.
- Excising the narrowed segment of tissue.
- Inserting a double-J (DJ) stent spanning from the renal pelvis to the bladder.
- Suturing the healthy ureter back to the reshaped renal pelvis.
- Placing a surgical drain and closing keyhole incisions.
What to Expect During Surgery?
Surgery lasts between 2 to 3.5 hours under general anesthesia with continuous vital sign monitoring.
Robotic/Laparoscopic vs Open Pyeloplasty
| Feature | Laparoscopic / Robotic Pyeloplasty | Open Pyeloplasty |
|---|---|---|
| Incision Size | 3-4 keyhole incisions (0.5–1 cm) | Single flank incision (10–15 cm) |
| Post-Op Pain | Minimal to moderate | Moderate to severe |
| Hospital Stay | 1 - 2 Days | 3 - 5 Days |
| Recovery Time | 1 - 2 Weeks | 4 - 6 Weeks |
Success Rate and Safety
Pyeloplasty carries a long-term cure rate exceeding 95%, restoring normal urine flow and stopping kidney damage.
Pyeloplasty Cost Estimate
| Procedure Approach | Estimated Cost Range (INR) |
|---|---|
| Open Pyeloplasty | ₹1,50,000 - ₹2,50,000 |
| Laparoscopic Pyeloplasty | ₹2,20,000 - ₹3,50,000 |
| Robotic-Assisted Pyeloplasty | ₹3,50,000 - ₹5,00,000 |
Disclaimer: Final costs depend on room category, surgeon expertise, and hospital charges.
Recovery Guide & Post-Operative Care
Recovery Timeline
- Day 1-2: Mobilization, soft diet, drain and catheter removal before discharge.
- Week 2-4: Outpatient DJ stent removal via cystoscopy; return to work.
- Week 6-12: Follow-up ultrasound scan confirming hydronephrosis resolution.
Post-Op Precautions & Care
- Hydration: Drink 2.5 to 3 liters of water daily.
- Avoid Heavy Lifting: Avoid lifting > 5 kg for 3 to 4 weeks.
- DJ Stent Care: Mild frequency or pink urine is expected while the stent is in place.
Frequently Asked Questions
What causes UPJ obstruction?⌄
UPJ obstruction can be congenital (present from birth due to intrinsic muscle narrowing or a crossing blood vessel) or acquired from scar tissue or stones.
What is a DJ stent and when is it removed?⌄
A double-J stent is a temporary internal tube that supports tissue healing. It is removed 2 to 4 weeks after surgery in a quick outpatient procedure.
Will pyeloplasty restore lost kidney function?⌄
Pyeloplasty stops further kidney damage and stabilizes function, significantly improving urine drainage kinetics.
How is post-operative pain managed?⌄
Minimally invasive options result in mild pain managed easily with oral analgesics and short-term anti-spasmodics.
How long is the overall recovery time?⌄
Most patients recover from robotic or laparoscopic pyeloplasty within 1 to 2 weeks.