“The Invisible Guardian”: The Vital Role of Ureteral Stents in Postoperative Recovery
——“Postoperative recovery is not only about the surgery itself, but also about protection and drainage.”
A ureteral stent (Double J stent), though appearing as a simple tube, plays a critical role between the kidney and the bladder. Its main function is to maintain urine flow, prevent postoperative complications, and protect renal function. Known as the “Invisible Guardian”, it works silently inside the body to ensure safe recovery of the urinary system after surgery.
What is a Ureteral Stent?
A ureteral stent is a flexible tube approximately 20–30 cm in length, with curled ends resembling a “pig tail” — hence the name “Double J stent”.
Main Functions: Protecting the Kidneys
Maintain Ureteral Patency
Prevent ureteral obstruction caused by postoperative edema, inflammation or residual stones, ensuring unobstructed urine flow.
Assist Stone Removal
Help small stones or stone fragments pass with urine, avoiding infection caused by residual calculi.
Protect Renal Function
Prevent urine reflux, hydronephrosis and renal damage.
Reduce Complications
Lower the risk of infection or stricture caused by urinary retention.
The ureteral stent can be understood as an “internal protective channel” that supports safe recovery of the kidney and bladder after surgery.
When is a Ureteral Stent Needed?
Urinary Tract Obstruction by Stones
When kidney or ureteral stones block urine flow and cause renal colic, a stent can urgently restore urinary drainage.
Postoperative Support
After ureteroscopic lithotripsy or pyeloplasty, stents support healing, prevent edema or stricture, and promote recovery.
Tumor Compression
When pelvic tumors (e.g., cervical cancer, prostate cancer) compress the ureter, stents help maintain urinary patency.
Congenital Stricture
Patients with congenital ureteral stricture may require long-term stenting to maintain patency.
Can Ureteral Stents Be Placed Permanently?
- After stone surgery: indwelling time is generally 2–4 weeks;
- Ureteral stricture dilation: indwelling time is 3–6 months;
- Advanced tumor compression: replaced every 6–12 months.
The ureteral stent acts as an “Invisible Guardian” in postoperative recovery thanks to its specialized materials and design:
Polyethylene
One of the earliest materials used for ureteral stents. Polyethylene is relatively flexible, translucent, and chemically stable in vivo.
Polyurethane
Combines the rigidity of polyethylene with the flexibility of silicone resin. Polyurethane features excellent biocompatibility, good flexibility and elasticity, strong anti-aging properties, non-toxicity, smooth surface and low encrustation.
Metal
Mostly nickel‑titanium alloy stents, mainly used for long‑term implantation to treat ureteral obstruction caused by malignant tumor compression.
The Indispensable Invisible Guardian
Despite its simple appearance, the ureteral stent protects the kidneys, maintains urinary flow, and prevents infection or renal damage during recovery. It is not only an essential tool for postoperative care, but also an “Invisible Guardian” for healthy recovery of the urinary system.
With extensive experience in catheter material manufacturing, ECO provides comprehensive catheter solutions for various medical departments. From ureteral stents to other medical catheters, we deliver high-quality, reliable products and support full‑process manufacturing:
Shaping: ensures stable stent configuration that meets anatomical requirements;
Punching: precise design to meet clinical fluid flow demands;
Radiopaque Marking: enables accurate in vivo positioning under X-ray.
Whether for product manufacturing or precision processing, ECO provides one‑stop catheter solutions to support physicians and patients toward a healthier future.
As a professional CDMO facility
We will continue to focus on technological innovation and manufacturing optimization, providing customers with customized, high-performance catheter solutions.
