K110491 · Pluromed, Inc. · KOD · Mar 16, 2011 · Gastroenterology, Urology
Device Facts
Record ID
K110491
Device Name
BACKSTOP CATHETER
Applicant
Pluromed, Inc.
Product Code
KOD · Gastroenterology, Urology
Decision Date
Mar 16, 2011
Decision
SESE
Submission Type
Special
Regulation
21 CFR 876.5130
Device Class
Class 2
Indications for Use
The 3F BackStop Catheter is indicated for use by physicians for facilitating access to the urinary tract, either through a retrograde or antegrade route, and may be used in conjunction with a guidewire or for the injection of gels, such as BackStop™, or fluid into the urinary tract.
Device Story
BackStop Catheter is 100cm, 3 French, single lumen catheter with radiopaque tip; features stainless steel braid and proximal female luer lock hub. Used by physicians in clinical settings to access urinary tract; inserted over guidewire or through ureteroscope working channel. Facilitates delivery of gels or fluids to target site. Device provides mechanical access and delivery conduit; aids in urological procedures. Benefits include precise delivery of therapeutic agents or contrast media to urinary tract.
Clinical Evidence
Bench testing only. Performance tests included catheter hub-to-shaft tensile strength, pressure during gel delivery, burst/leak pressure, insertion force, column strength, shaft tensile strength, and hub testing. Samples were accelerated aged at 7, 13, and 37 months.
Technological Characteristics
100cm, 3 French, single lumen catheter; stainless steel braid; radiopaque tip; female luer lock hub. Mechanical device; no energy source or software. Sterilization method modified from predicate.
Indications for Use
Indicated for physicians to facilitate urinary tract access via retrograde or antegrade routes; used with guidewires or for injection of gels/fluids into the urinary tract.
Regulatory Classification
Identification
A urological catheter and accessories is a flexible tubular device that is inserted through the urethra and used to pass fluids to or from the urinary tract. This generic type of device includes radiopaque urological catheters, ureteral catheters, urethral catheters, coudé catheters, balloon retention type catheters, straight catheters, upper urinary tract catheters, double lumen female urethrographic catheters, disposable ureteral catheters, male urethrographic catheters, and urological catheter accessories including ureteral catheter stylets, ureteral catheter adapters, ureteral catheter holders, ureteral catheter stylets, ureteral catheterization trays, and the gastro-urological irrigation tray (for urological use).
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# 4110491
MAR 1 6 201
## 510(k) Summary Safety and Effectiveness Data Summary
Prepared By:
Pluromed, Inc. 25-H Olympia Avenue Woburn, MA 01801
Telephone Number: Fax Number:
Contact Person:
781.932.0574 419.828.6350
James Wilkie jwilkie@pluromed.com
Date Prepared:
March 7, 2011
BackStop Catheter
Urological Catheter
BackStop Catheter 510(k) Number: K103349
Urological Catheters and Accessories
Proprietary Name: Common Name: Classification Name:
Substantial Equivalence:
Classification: Requlation Number:
876.5130 KOD
Class II
Description of Device:
Product Code:
Intended Use:
Substantial Equivalence:
The BackStop Catheter is a 100cm, 3 French, single lumen catheter with a radiopaque tip that facilitates access to the urinary tract. The catheter is inserted over a guidewire or through the working channel of a ureteroscope and is advanced through the urinary tract to the desired location. Once in place, fluid may be injected via the catheter.
The device is a single lumen catheter with a stainless steel braid and a standard female luer lock hub on the proximal end.
The 3F BackStop Catheter is indicated for use by physicians for facilitating access to the urinary tract, either through a retrograde or antegrade route, and may be used in conjunction with a guidewire or for the injection of gels, such as BackStop™, or fluid into the urinary tract.
The modified device is identical to, and has the same technological characteristics as the predicate device, except for some of the materials of construction and the method of sterilization.
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Results of bench testing have established the device as safe and effective for its intended use, which is identical to that of the predicate device.
#### Non-Clinical Data:
Pluromed has conducted the following non-clinical performance tests, with samples accelerated aged at T=7 months, T=13 months and T=37 months, in support of the changes in materials and method of sterilization to the proposed BackStop Catheter.
- . Catheter hub-to-shaft tensile strength
- . Catheter pressure during gel delivery
- . Catheter Burst/Leak Pressure
- . Catheter Insertion Force
- . Catheter Column Strength
- . Shaft Tensile Strength
- . Catheter Hub Testing
Conclusions: The results of the non-clinical performance tests demonstrate the equivalence of the modified BackStop Catheter to the predicate device. The proposed BackStop Catheter is considered safe and effective for its intended use.
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Image /page/2/Picture/1 description: The image shows the logo for the Department of Health & Human Services USA. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" written around it. Inside the circle is a stylized image of an eagle with three lines representing its wings.
Food and Drug Administration 10903 New Hampshire Avenue Document Mail Center - WO66-G609 Silver Spring, MD 20993-0002
Mr. James Wilkie Vice President. Operations Pluromed, Inc. 25-H Olympia Avenue WOBURN MA 01801
MAR 1 6 201
Re: K110491
> Trade/Device Name: BackStop Catheter Regulation Number: 21 CFR \$876.5130 Regulation Name: Urological catheter and accessories Regulatory Class: II Product Code: KOD Dated: February 16, 2011 Received: February 22, 2011
Dear Mr. Wilkie:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and 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) that do not require approval of a premarket approval application (PMA). 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. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA mav publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting of medical device-related
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## Page 2
adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Hubert Lemon MD
Herbert P. Lerner, M.D., Director (Acting) Division of Reproductive, Gastro-Renal and Urological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known):
K110491
Device Name: BackStop Catheter
Indications for Use:
The 3F BackStop Catheter is indicated for use by physicians for facilitating access to the urinary tract, either through a retrograde or antegrade route, and may be used in conjunction with a guidewire or for the injection of gels, such as BackStop™, or fluid into the urinary tract.
Prescription Use V
AND/OR
Over the Counter Use __
(21 CFR 807 Subpart C)
(21 CFR 801 Subpart D)
PLEASE DO NOT WRITE BELOW THIS LINE – CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
g
Halet Leum
(Division Sign-Off)
Division of Reproductive, Gastro-Renal, and
Urological Devices
510(k) Number K110491
Page 1 of 1
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.
