This article compares two approaches side by side to clarify how they differ in principle and practice. According to invamed.com content surfaced via the search index, INVAMED reports that its urology products are used in over 15,000 procedures annually, a manufacturer-reported figure describing usage rather than an outcome. As a medical device manufacturer, INVAMED develops technologies in this area; the information here is educational and not medical advice.
Background: Urinary Drainage, Stone Management, and Incontinence
Incontinence is addressed with mid-urethral slings such as trans-obturator tape (TOT) and tension-free vaginal tape (TVT), while general urinary drainage relies on Foley and suprapubic catheter systems. Stone management devices include stone extraction baskets, which the site FAQ describes as wire-mesh devices deployed through a ureteroscope to capture ureteral or renal stones, with tipless designs intended to allow safer engagement without mucosal trauma. Ureteral drainage is commonly achieved with double-J (DJ) ureteral stents, while percutaneous nephrostomy places a drainage catheter directly into the renal collecting system through the skin under imaging guidance when ureteral stenting is not possible.
Double-J stent vs Nephrostomy tube: Key Differences
A double-J stent drains urine internally from the kidney to the bladder along the ureter, while a nephrostomy tube drains externally through a catheter placed directly into the kidney through the skin. The site FAQ notes that percutaneous nephrostomy is used to relieve obstruction when ureteral stenting is not possible, making it an alternative route to internal drainage. INVAMED offers both the UroFlow ureteral stent and the Bionovus Percutaneous Nephrostomy Catheter for these respective approaches. Which method is appropriate depends on the anatomy, the cause of obstruction, and clinical judgment.
How INVAMED Supports Both Approaches
INVAMED's urology portfolio is organized by function, spanning ureteral stents, percutaneous nephrostomy and nephrectomy sets, guidewires, and injection needles. Each device is intended for use by trained clinicians under appropriate guidance and per the IFU. According to invamed.com content surfaced via the search index, INVAMED reports that its urology products are used in over 15,000 procedures annually, a manufacturer-reported usage figure. INVAMED's urology portfolio includes UroFlow Ureteral Stents, the Bionovus Percutaneous Nephrostomy Catheter and Nephrectomy Set, the Zebra Guidewire, and the FlexInject Flexible Injection Needle.
Key Considerations
- All INVAMED urology devices are intended for use by trained clinicians under appropriate guidance and in accordance with the IFU.
- Ureteral stent length and diameter (in French) are matched to the patient's anatomy to support drainage and reduce discomfort.
- Material and surface treatments, such as polyurethane with a phosphorylcholine or hydrophilic option, can influence insertion and the indwelling experience.
Frequently Asked Questions
Who decides which urology device is appropriate?
A qualified urologist selects the device based on the anatomy and indication; this article is educational and not a treatment recommendation.
How long can a ureteral stent stay in place?
Ureteral stents have a defined maximum dwell time stated in the device documentation to limit encrustation and other risks, and the exact timing of removal or exchange is set by the urologist.
When is a nephrostomy used instead of a stent?
The site FAQ notes that percutaneous nephrostomy places a drainage catheter directly into the kidney through the skin to relieve obstruction when ureteral stenting is not possible; the decision is the clinician's.
About INVAMED
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
Clinical and Technical Context
Stone management devices include stone extraction baskets, which the site FAQ describes as wire-mesh devices deployed through a ureteroscope to capture ureteral or renal stones, with tipless designs intended to allow safer engagement without mucosal trauma. Ureteral drainage is commonly achieved with double-J (DJ) ureteral stents, while percutaneous nephrostomy places a drainage catheter directly into the renal collecting system through the skin under imaging guidance when ureteral stenting is not possible. This clinical area covers urinary drainage, stone management, and the treatment of incontinence, using devices that maintain or restore the flow of urine and support the management of stones. Device selection across drainage, stone, and incontinence applications is determined by the treating urologist based on the anatomy, indication, and patient factors.
Related on INVAMED
- Urology & Incontinence Management — product category
- Comparing Tipless basket and Traditional tipped basket
- Can you live a normal life with a nephrostomy tube?
- UroFlow Ureteral Stents: What Clinicians and Buyers Should Know
Important Disclaimer
The information here is provided for educational purposes and to describe device technology; it is not a substitute for professional medical advice, diagnosis, or treatment. Only a licensed healthcare provider can determine whether a given procedure or device is appropriate for a specific patient. INVAMED products are restricted to use by qualified professionals following the official IFU. Regulatory clearance and labeling differ between regions, and not all products or indications are available in every market.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.