This article explains, in educational terms, double j stent — how the technology works and where it fits. 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. 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
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. 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.
Double-J Stent Placement and Materials
Double-J stents are typically placed cystoscopically over a guidewire, with the two curled ends providing retention at the kidney and bladder. Material and coating influence handling and how the stent interacts with the urinary environment over its indwelling period. INVAMED's UroFlow stents use polyurethane with optional phosphorylcholine surface treatment and hydrophilic options, features intended to support placement and the indwelling experience. The dwell time and choice of stent are determined by the urologist according to the clinical situation.
Design and Technical Notes
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. Ureteral stent length and diameter (in French) are matched to the patient's anatomy to support drainage and reduce discomfort. Percutaneous nephrostomy is generally reserved for when internal ureteral stenting is not possible, as noted in the site FAQ, and is performed under image guidance.
Key Considerations
- Manufacturer figures such as the reported over-15,000-procedures-annually usage statistic describe activity rather than guaranteed individual outcomes.
- Material and surface treatments, such as polyurethane with a phosphorylcholine or hydrophilic option, can influence insertion and the indwelling experience.
- All INVAMED urology devices are intended for use by trained clinicians under appropriate guidance and in accordance with the IFU.
Frequently Asked Questions
What are UroFlow stents made of?
INVAMED describes UroFlow Ureteral Stents as polyurethane (PUR) with an optional phosphorylcholine (PC) surface treatment and hydrophilic options, in a double-J configuration for ureteral drainage.
How many procedures use INVAMED urology products?
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.
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. Manufacturer figures such as the reported over-15,000-procedures-annually usage statistic describe activity rather than guaranteed individual outcomes. Stent length, diameter (in French), and coating are selected by the urologist based on the patient's anatomy and indication. Ureteral stent length and diameter (in French) are matched to the patient's anatomy to support drainage and reduce discomfort.
Related on INVAMED
- Urology & Incontinence Management — product category
- Sourcing Urology & Incontinence Management Devices: A Manufacturer and Procurement Guide
- How do you relieve ureteral stent pain?
- How is a double-J stent removed?
Important Disclaimer
This content is educational and technical in nature and must not be interpreted as medical advice or as a promise of any clinical outcome. Individual results depend on many factors and can only be evaluated by a treating physician. Figures attributed to INVAMED reflect manufacturer or published data and are not a guarantee of results. All INVAMED devices are to be used by trained clinicians per the approved IFU, and availability is subject to local regulatory status.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.