Difference between revisions of "Ureteral Stent"

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= Product to Patent Mapping =
= Product to Patent Mapping =
[[Image:Product_Patent_Mapping_Screen_Shot.png|1000px|centre|thumb|'''Screenshot for the product to patent mapping(Bard and Boston)''']]
[[Image:Product_Patent_Mapping_Screen_Shot.png|1000px|centre|thumb|'''Screenshot for the product to patent mapping(Bard and Boston)''']]
* Click [[Media:Product_Patent_Mapping_Bard_Boston.xls|'''Products from Boston Scientific and C R Bard ''']]to download the excel file.
* Click [[Media:Product_Patent_Mapping_Bard_Boston.xls|'''Products from Boston Scientific and C R Bard ''']]to download the excel file.

Revision as of 21:34, 6 August 2011

This is a landscape report on the Ureteral stent market, including key company profiles, products, patents and relevant clinical trails.

  • What is it? A ureteral stent is a specially designed hollow tube, made of a flexible plastic material that is placed in the ureter.
  • Need for a ureteral stent: In patients who have, or might have, an obstruction (blockage) of the kidney, an internal drainage tube called a ‘stent’ is commonly placed in the ureter, the tube between the kidney and the bladder. This is placed there in order to prevent or temporarily relieve the obstruction.


Ureteral stents are used in urological surgery to maintain patency of the ureter to allow urine drainage from the renal pelvis to the bladder. These devices can be placed by a number of different endourological techniques. They are typically inserted through a cystoscope and may also be inserted intraoperatively. Indwelling ureteral stents help to reduce complications and morbidity subsequent to urological and surgical procedures. Frequently, ureteral stents are used to facilitate drainage in conjunction with Extracorporeal Shock Wave Lithotripsy (ESWL) and after endoscopic procedures. They are also used to internally support anastomoses and prevent urine leakage after surgery. Ureteral stenting may almost eliminate the urological complications of renal transplantation. An antimicrobial ureteral stent, which inhibits encrustation and bacterial colonization while maintaining patient comfort.

  • Ureteral stent: resists migration, resists fragmentation, is kink resistant and radiopaque.
  • Bacterial colonization: antimicrobial activity for up to two weeks.
  • Patient Comfort: stent has a low coefficient of friction (value) for ease of insertion and will soften on implant at body temperature to maintain patient comfort.

more on background...

Market Overview

Market for ureteral stent can be analyzed by estimating market for each of Ureteral Stent’s fundamental use. Other uses of Ureteral Stent include Post-surgical swelling/infection of uterus, Active kidney infection etc.

more on market overview...

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Clinical Trials


New trials

Intervention: Device
Sponsors and Collaborators
Assessment of Drug-Eluting Ureteral Stent on Bacterial Adherence and Biofilm Formation Renal Calculi, Ureteral Obstruction Ureteral Stent Lawson Health Research Institute, Boston Scientific Corporation
Memokath® 044TW Stent for Treatment of Urethral Stricture Urethral Stricture Memokath stenting Engineers & Doctors Wallsten Medical Group
Study to Determine if There Are Specific Clinical Factors to Determine Stent Encrustation Kidney Stones N\A University of California, Irvine
Ureteral Stent Length and Patient Symptoms Kidney Stones Ureteral Stent Emory University
Drainage of Malignant Extrinsic Ureteral Obstruction Using the Memokath Ureteral Stent Ureteral Obstruction Memokath 051 Ureteral Stent Mayo Clinic Engineers & Doctors Wallsten Medical Group
A Prospective Comparison Between Ureteral Stent and Nephrostomy Tube for an Urgent Drainage of Obstructed Kidney (JJVsPCN08) Kidney Disease Nephrostomy tube and ureteral stent Rabin Medical Center

Concluded trials

Long-term outcome of permanent urethral stents in the treatment of detrusor-sphincter dyssynergia To evaluate the long-term efficacy of a permanently implanted urethral stent in the treatment of spinally injured patients with detrusor-sphincter dyssynergia. 13 Detrusor-sphincter dyssynergia Stenting is an effective alternative to sphincterotomy in the long-term, although secondary bladder neck obstruction is a frequent problem.
Nephrostomy Tube or 'JJ' Ureteric Stent in Ureteric Obstruction: Assessment of Patient Perspectives Using Quality-of-Life Survey and Utility Analysis Upper urinary tract obstruction is often relieved by either a percutaneous nephrostomy tube (PCN) or a ureteric stent. Both can cause considerable morbidity and reduce patient's health-related quality of life (QoL). We have compared the QoL in these 2 groups. 34 Upper urinary tract obstruction Patients with 'JJ' stents have significantly more irritative urinary symptoms and a high chance of local discomfort than patients with nephrostomy tubes (PCN). However, based on the EuroQol analysis, there is no significant difference in the gross impact on the health-related QoL or the utility between these groups indicating no patient preference for either modality of treatment.
Impact of stents on urological complications and health care expenditure in renal transplant recipients: results of a prospective, randomized clinical trial. A randomized, prospective trial to compare the incidence of early urological complications and health care expenditures in renal transplant recipients with or without ureteral stenting. 201 Renal transplant recipient Using a ureteral stent at renal transplantation significantly decreases the early urinary complications of urine leakage and obstruction. However, there is a significant increase in urinary tract infections, primarily beyond 30 days after transplantation. Stent removal within 4 weeks of insertion appears advisable.

Pre-Market Notification

Some of the companies active in the field of ureteral stents have been represented in the table below.

Date of Approval
Indwelling Time (days)
Bard Urological
FDA 510(k)
Dec 2004
Silicone Double pigtail with monofilament suture loop
Boston Scientific
FDA 510(k)
Mar 2003
Dual Durometer Percuflex with HydroPlus Coating Bladder loop design
Cook Medical
FDA 510(k)
May 2007
Metal Temporary stenting
Fossa Medical
FDA 510(k)
Aug 2002
Polyurethane Spiral radially expanding stent
CE Mark
Sep 2005
Pnn Medical A/S
CE Mark
Nickel-titanium shape memory alloy Double fluted ended spiral stent



The FDA classifies a ureteric stent as follows:

  • Subpart E - Surgical Devices
  • Sec. 876.4620 - Ureteral stent.
  • Classification - class II device Code of Federal Regulations
Sr. No. Company Device(s) Approval Approval Date Material Technology Indwelling Time (days) Image
1 Allium, Israel URS CE Mark Jul, 2007 Nickel-titanium shape memory alloy covered by polymer Self-expanding stent
2 Pnn Medical A/S Memokath 051 CE Mark 1995 Nickel-titanium shape memory alloy Double fluted ended spiral stent 240
Memokath 051
FDA Listing Mar, 2004
3 Fossa Medical Stone Sweeper CE Mark Sep, 2005 Polyurethane Radially expanding stent 13
Stone Sweeper
FDA 510(k) Aug, 2002
Open lumen stent FDA 510(k) Nov, 2003 Polyurethane Pigtail-tipped stent with Pusher
CE Mark Sep, 2005
Expanding Ureteral Stent FDA 510(k) Jun, 2002 Polyurethane Double pigtail stent with Pusher N/A
4 Boston Scientific Contour Percuflex - proprietary polyolefin copolymer; Hydroplus coating Fixed and variable length; Tapered tip 365
Percuflex Percuflex Pigtail 365
Polaris Ultra FDA 510(k) Jan, 2001 Dual Durometer Percuflex with HydroPlus Coating; soft Nautilus Bladder Coil. Double pigtail 365
Polaris Ultra
Polaris Loop FDA 510(k) Mar, 2003 Dual Durometer Percuflex with HydroPlus Coating Bladder loop design 365
Polaris Loop
Retromax Plus Percuflex material and Hydroplus coating Endopyelotomy stent Post-procedure healing
Retromax Plus
Stretch VL Flexima Hydroplus Coating Variable length coil on distal and proximal ends 90
Stretch VL Flexima
Drug-Eluting Stent Percuflex - proprietary polyolefin copolymer Ketorolac trimethamine loaded stent N/A
5 Cook Medical Resonance FDA 510(k) May, 2007 Metal 365
Sof-flex AQ® Hydrophilic Coating Radiopaque tip and tether for repositioning 180
Endo-Sof AQ® Hydrophilic Coating Double pigtail 365
C-Flex Double Pigtail 180
Smith Universal Nephrostomy tube + Ureteral stent 60
Smith Universal
Endo-Sof Radiance Launch Dec, 2007 Heparin-bonded stent
6 Q Urological pAguaMedicina™ Pediatric Ureteral Stent FDA 510(k) Jan, 2010 Hydrogel Differentially larger end (no pigtail) 30
7 Bioteque Corp. Ureteral Stent Set FDA 510(k) Apr, 2010 30
8 Applied Medical Resources, CA, USA Mesh FDA 510(k) Jul, 2001 Polyester mesh Double-pigtail N/A
Silhouette Coil-reinforced; SL-6® hydrophilic coating Patency Device
Applied Standard FDA 510(k) Jun, 1999 Proprietary thermoplastic elastomer material; SL-6® hydrophilic coating Unique wall construction and enlarged drainage holes
Applied Standard
7-10 endopyelotomy Proprietary thermoplastic elastomer material; SL-6® hydrophilic coating Dual Diameter stent
Endopyelotomy Stent
9 Bard Urological InLay Optima FDA 510(k) Dec, 2004 Silicone Double pigtail with monofilament suture loop 365
InLay Optima
Bardex® Double Pigtail Soft Stent FDA 510(k) Jan, 2003 Silicone Attached with suture for ease of removal
Fluoro-4 Silicone Ureteral Stent Silicone/tantalum
Fluoro 4
Figure-4 Silicone Ureteral Stent Silicone Three dimensional design
Figure 4
InLay Ureteral Stent FDA 510(k) Dec, 1998 Silicone Tapered tip and lubricious hydrophilic coating
Urinary Diversion Stent FDA 510(k) Apr, 1991 Silicone
Urinary Diversion Stent
10 Coloplast-Porges Vortek FDA 510(k) Oct, 1998 Silicone Double coating for easy maneuverability as well as flexibility
Biosoft FDA 510(k) Oct, 1998 Silicone Extreme flexibility
Polyurethane Hard or soft Polyurethane Designed for short-term use 90
Silicone FDA 510k) Oct, 2002 Silicone Pyatiprofilnaya technology
11 Teleflex Medical Rüsch Superglide DD FDA 510(k) Jul, 1999 WIRUTHAN® (polyurethane) with hydrogel coating Directable and detachable
Superglide DD
12 Gyrus ACMI/Cabot/Acromed/Circon/Surgitek Classic closed-tip FDA 510(k) Dec, 1986 Classic Closed Tip
Classic Closed Tip
Classic Double pigtail FDA 510(k) Mar, 1996 Tecoflex® construction Balanced-curled double pigtail design
Double Pigtail
Double-J FDA 510(k) Apr, 1988 Silicone Double-J closed-tip
Lithostent Tecoflex® Grooved design
Lubri-flex FDA 510(k) Nov, 1991 Tecoflex® “Rememberance” of shape with a chemically bonded wettable solution
Multi-flex Tecoflex® Two durometers with helical kidney curls
Quadra-Coil multi-length FDA 510(k) Mar, 1996 Tecoflex® Accomodate ureteral lengths from 22cm to 28cm
Sof-curl Tecoflex® Dual-durometer design and exclusive soft bladder helix
Uroguide Silicone Classic Double J with open tip
13 Ameco Medical Industries Amecath Nitinol; Available with hydrophilic coating Double loop stent Short-term and long-term
14 Angiomed-Movaco (C.R. Bard subsidiary) Ureteral Stent Set FDA 510(k) Jan, 1987 Nitinol Self-expanding stent N/A

Product to Clinical Trial Mapping

Clinical Timeline Visualization


Ureteral Stent Timeline

Product to Patent Mapping

Screenshot for the product to patent mapping(Bard and Boston)

Mapped Patent vs Not Mapped Patents

C R Bard
Boston Scientific

Patent-Product-Clinical Trial Mapping

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Boston Scientific C R BARD
Products Portfolio 8 Products 6 Products
Material Percuflex - Biocompatible Polymer Silicone
Coating Hydroplus Licensed from pHreecoat
Shape Pigtailed and More Figure 4 and more
Current Trials Truimph Ureteral stent - Loaded with Triclosan
Currently in Phase II (Canada)
Patents Coating Therapeutic / Medicinal coatings
Magnetic nano particles for MRI Imaging
Lubricious coatings helping easy insertion
Therapeutic coatings
Structure Multiple channels filled with therapeutic agent
Multiple collapsible segments preventing fluid passing
Renal coil with wick to prevent reflux
Stent with beads on its surface
Stent with reservoir indicating its release
with change in color of urine
Expandable and collapsible stent
Stents with degradable barbs
Expandable stents for reducing discomfort
Material Elastically deformable stents
Biodegradable polymer based stents
Porous polymer for long term implantation
Stent with variable hardness
Biodegradable polymers
Shape memory alloys
General polymer based


Boston Scientific C R BARD
Relatively late entrant with patents filed post mid 90s Early mover with patents filed in mid 80s
Increased patent activity since 2000 Patent activity never gained traction
Large number of patents yet to be "productized" Few patents yet to be "productized"
Some products undergoing clinical trails No products undergoing clinical trails
Diverse range of products with variation in material
and structure
Small product portfolio
Seem to be strengthening they market position Seem to be moving focus away from Ureteral stents market

Competitive Landscape

Major Players

  • Boston Scientific Limited, Abbott, Medtronic and Cook Inc. are the major players in ureteral stent research field.
Major Players

IP Activity

  • Patenting activity has been high growth rate during the period 2001 to 2005 with a peak no. of patents in year 2005, followed by saturation during the period 2006 to 2008 and after that a gradual declination upto year 2010 in the ureteral stent research area.
IP activity over the years


Total Sales in 2010 - 4.04 Billion USD

Company Total Sales in 2010 Urological sales Percentage share Product portfolio
Boston Scientific 7800 661 8.48 Boston_portfolio
CR BARD 2700 702 26.00 BARD_portfolio
Cook Medical 1700 - - Cook_portfolio
Medline 4040 - - Medline_portfolio

All figures in USD million

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