The Rüsch Ureter Stent is intended for use in temporary internal drainage from the kidney to the bladder or other external collecting location.
Device Story
Rüsch Ureter Stent (DD and Integral sets) provides temporary internal drainage from kidney to bladder or external collection. Device is over-the-wire, coaxial, radiopaque, single-use; features include graduated open or cylindrical tips, optional hydrogel coating, drainage holes, and positioning markers. Sets include introducer sheath, PTFE/hydrogel-coated guidewire, and fixing clips. Used in clinical settings by physicians for urological procedures. Stent facilitates urine flow, relieving obstruction or supporting healing. Sterilized via ethylene oxide.
Clinical Evidence
Bench testing only. No clinical data provided.
Technological Characteristics
Radiopaque ureteral stent; materials include stainless steel (stylet), PTFE/hydrogel coatings, and plastic components. Features include graduated tips, drainage holes (5-20 mm intervals), and positioning lines. Sterilized via ethylene oxide. Non-electronic, mechanical device.
Indications for Use
Indicated for patients requiring temporary internal drainage from the kidney to the bladder or to an external collection device.
Regulatory Classification
Identification
A ureteral stent is a tube-like implanted device that is inserted into the ureter to provide ureteral rigidity and allow the passage of urine. The device may have finger-like protrusions or hooked ends to keep the tube in place. It is used in the treatment of ureteral injuries and ureteral obstruction.
Predicate Devices
Microvasive Boston Scientific Corporation, Mardis Stent Set (K982974)
{0}------------------------------------------------
## 2 1999 JUL -
K982974
Image /page/0/Picture/2 description: The image shows the logo for RUSCH International Group Regulatory Affairs, a subsidiary of Teleflex Incorporated (USA). The word "RUSCH" is in large, bold, black letters at the top of the image. Below that, in smaller letters, is the text "INTERNATIONAL Group Regulatory Affairs A Subsidiary of Teleflex Incorporated (USA)".
Tall Pines Park Jaffrey, NH 03452 (603) 532-7706 FAX (603) 532-8211 or 6108
510 (k) Summary
### Submitter Name, Address, and Date of Submission. ਜ
Miss Karenann J. Brozowski Group Regulatory Affairs Director Rüsch International Tall Pines Park Jaffrey, New Hampshire 03452
(603) 532-7706 Telephone: Facsimile: (603) 532-8211
Contact : Same as above
## 2 -Name of the Device, Common, Proprietary (if Known), and Classification.
Classification Name: Ureteral Stent
Common Name: Ureteral Stent
Proprietary Name: Rüsch Ureter Stent Integral Set and Rüsch Ureter DD Stent Sets
# 3 . Identification of the legally marketed device to which the submitter claims equivalence.
The Rüsch Ureter Stent, is substantially equivalent in design, use, and materials to the:
- Microvasive® Boston Scientific Corporation, Mardis Stent Set with guidewire.
- . Surgitek®, Cabot Medical Corporation, available with and without guidewire.
- Mentor filiform ureteral double pigtail silicone stent .
{1}------------------------------------------------
- Cook Double Pigtail Standard and AQ Stent Sets .
- American Catheter Amcath Uroglide™ Stent ●
- . Microvasive Hydro-Plus™ Coated Marquis Stent
#### Description of the Device. 4 .
The Rusch DD Ureter Stent Set is an over the wire, coaxial, sterile, single use, radiopaque ureter stent that consists of a graduated open or cylindrical tip ureter stent with DD connector, optional hydrogel coating to aid in insertion, an introducer sheath with connector, a PTFE/Hydrogel coated guidewire with flexible core and marking, fixing clamp and an inner pouch that separates the stent from the guidewire during shipping and storage. These items are packaged in a paper and film pouch and sterilized with Ethylene Oxide.
The pouch is printed with company name and address, "Sterile", "Contents sterile provided package is not damaged or open", and the USA caution statement "Caution: Federal law (USA and Canada) restricts this device to sale by or on the order of a physician." The pouches are packed in a paperboard box which bears the manufacturer's name and address and a description of the product within. The box label contains the company name and address, product name, quantity, size, lot number, sterilization date, method of sterilization, expiration date, catalog number, single use statement, Sterile, and length of product.
The Rusch Integral Ureter Stent Set consists of a ureter stent that is completely radiopaque, coiled cylindrical or open tip with drainage holes at intervals of 5-20 mm, centimeter graduations, optional hydrogel coating, continuous black positioning line to indicate the direction in which the catheter tip coils, and black marking at the catheter end. The introducer sheath is approximately 45 cm long. The spiral stylet is made of stainless steel with optional PTFE/Hydrogel coating and a flexible safety tip and a marked rigid tip and is approximately 100 cm long. There are also plastic clips in the set.
{2}------------------------------------------------
For Ureterorenoscope applications the same features exist but the introducer sheath is approximately 90 cm long and the flexible stylet is approximately 150 cm long. One product configuration allows drainage of the renal system to external collection equipment (not supplied.
#### 5. Intended Use of the Device.
The Rüsch Ureter Stent is intended for use in temporary internal drainage from the kidney to the bladder or other external collecting location.
### 6. Summary of Technological Characteristics.
The technological characteristics are the same as or equivalent to predicate devices, which have been listed in section 3.
{3}------------------------------------------------
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
2 1999 اللا
Ms. Karenann J. Brozowski Group Requlatory Affairs Director Rüsch International Talls Pines Park Jaffrev, NH 03452
Re: K982974
Rüsch DD Ureteral Stent Set, Rüsch Integral Ureteral Stent Set Dated: April 16, 1999 Received: April 19, 1999 Requiatory Class: II 21 CFR §876.4620/Procode: 78 FAD
Dear Ms. Brozowski:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class III (Special Controls) or class III (Premarket Approval), it may be subject to such additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations. Title 21. Parts 800 to 895. A substantially equivalent determination assumes compliance with the Current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
This letter will allow you to begin marketing your device as described in your 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling requlation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compiiance at (301) 594-4613. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the requiation entitled. "Misbranding by reference to premarket notification"(21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597, or at its internet address "http://www.fda.gov/cdrh/dsma/dsmamain.html".
Sincerely yours,
CAPT Daniel G. Schultz, M.D. Acting Director, Division of Reproductive, Abdominal, Ear, Nose and Throat, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
Page 1 of 1
K982972 510(k) Number (if known): _
Device Name: _ Rüsch Ureter Stent
Indications for Use:
Rusch ureter stents are intended for use in temporary internal drainage from the kidney to the bladder or other external collecting location.
PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH/ Office of Device Evaluation (ODE)
David h. Segmen
(Division Sign-Off)
Division of Reproductive, Abdominal, ENT, and Radiological D 510(k) Number
Prescription Use X
OR
Over-The-Counter Use
(Per 21 CFR 801.109)
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.