K050889 · Crs Medical Diagnostics, Inc. · LJS · Aug 26, 2005 · General Hospital
Device Facts
Record ID
K050889
Device Name
FIBRIN ANALYSIS SYSTEM ENDOLUMINAL BRUSH
Applicant
Crs Medical Diagnostics, Inc.
Product Code
LJS · General Hospital
Decision Date
Aug 26, 2005
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 880.5970
Device Class
Class 2
Indications for Use
The CRS Endoluminal Brush is intended to collect a biofilm or fibrin sample, which is suitable for microbiological analysis, from the inner lumen surface of an in-dwelling central venous catheter
Device Story
Device is an accessory to central venous catheters used in hospital settings by clinicians. It consists of nylon bristles on a flexible stainless steel wire with a rigid metal handle and luer lock fitting. The clinician inserts the brush into the inner lumen of an indwelling catheter to collect biofilm or fibrin samples. The collected sample is then sent for microbiological analysis to assist in clinical decision-making regarding catheter-related infections. The device is single-use and provided sterile.
Clinical Evidence
Bench testing only; no clinical data presented. Device is identical to the predicate.
Technological Characteristics
Materials: Nylon bristles, stainless steel wire, metal handle. Design: Flexible wire with distal brush and proximal luer lock. Sterilization: Ethylene Oxide (EO). Single-use. Complies with ANSI/AAMI biocompatibility and non-pyrogenic standards.
Indications for Use
Indicated for patients with indwelling central venous catheters requiring collection of biofilm or fibrin samples for microbiological analysis.
Regulatory Classification
Identification
A percutaneous, implanted, long-term intravascular catheter is a device that consists of a slender tube and any necessary connecting fittings, such as luer hubs, and accessories that facilitate the placement of the device. The device allows for repeated access to the vascular system for long-term use of 30 days or more, and it is intended for administration of fluids, medications, and nutrients; the sampling of blood; and monitoring blood pressure and temperature. The device may be constructed of metal, rubber, plastic, composite materials, or any combination of these materials and may be of single or multiple lumen design.
Special Controls
*Classification.* Class II (special controls) Guidance Document: “Guidance on Premarket Notification [510(k)] Submission for Short-Term and Long-Term Intravascular Catheters.”
{0}------------------------------------------------
AUG 26 2005
K050889 page
### EXHIBIT 2
510(k) Summary CRS Medical Diagnostics, Inc. 662 Capitol Drive Pewaukee Wisconsin 53072 Tel 262-264-0047 Fax 262-264-0051 August 19, 2005 Contact: Robert S. Brewer, Chairman of the Board
- 1. Identification of the Device: Proprietary-Trade Name: CRS Endoluminal Brush Catheter, intravascular, therapeutic, long-term greater than 30 Classification Names: days, product code LJS Common/Usual Name: Endoluminal Brush
- 2. Equivalent legally marketed devices The CRS Endoluminal Brush is IDENTICAL to the FAS Endoluminal Brush, K993614
- 3. Indications for Use (intended use) The CRS Endoluminal Brush is intended to collect a biofilm or fibrin sample, which is suitable for microbiological analysis, from the inner lumen surface of an in-dwelling central venous catheter
- 4. Description of the Device: The CRS Endoluminal Brush product line is an accessory to central venous catheters. Each single use Endoluminal Brush kit contains 2 pairs of latex free gloves, 1- 70% isopropyl alcohol cleaning agent, 1 fibrin brush in transport bag, 1- 10 cc syringe, 2 patient labels, 1 medical drape, 1 over wrap, and Instructions for Use. The brush consists of nylon bristles wound into a flexible stainless steel wire, which is further wound into a tubular, metal, rigid handle. The Brush is enclosed within a no ratiner would at the distal end and is attached to a standard luer lock at its proximal end. The luer lock fitting complies with catheter manufacturers' requirement that only luer-lock connections be used with catheters. The various CRS Endoluminal Brush products defined by the product codes differ mainly in the length of the flexible wire and the diameter of the Brush bristles.
- 5. Safety and Effectiveness, comparison to predicate device. The results of bench and clinical testing indicates that the new device is as safe and effective as the predicate devices.
{1}------------------------------------------------
K050889
page 2 of 2
| Characteristic | Predicate FAS Endoluminal Brush K993614 | CRS Endoluminal Brush K050889 |
|-------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Intended Use: | Intended to collect a biofilm or fibrin sample, which is suitable for microbiological analysis, from the inner lumen surface of an in-dwelling central venous catheter | Same |
| Instructions for Use: | Provided with illustrations | Same |
| Target Population: | Patients with indwelling catheters. | Same |
| Anatomical Size: | Patient catheter | Same |
| Area of Use: | Hospital | Same |
| Design: | Per patent 5,405,755 | Same |
| Standards Met: | ANSI/AAMI<br>Biocompatibility;<br>Non-pyrogenic | Same |
| Materials: | Nylon bristles wound into a stainless steel flexible wire | Same |
| Supplied items: | Measuring tape, patient drape, instructions for use, wire clippers, specimen container with cap, patient identification label | 2 Pair Latex-free Gloves<br>Endoluminal Brush In<br>Transparent Sheath<br>Cleaning Agent<br>1 10cc Syringe<br>1 Overwrap Drape<br>1 Medical Drape<br>2 Patient Identification Labels<br>Package insert |
| Sterility: | Provided packaged and sterile, Gamma<br>Single Use Only | Provided packaged and sterile, EO<br>Single Use Only |
| Electrical Safety: | N/A | N/A |
| Chemical Safety: | N/A | N/A |
| Energy Used and/or Delivered: | N/A | N/A |
# 6. Substantial Equivalence Chart, CRS Endoluminal Brush
#### 7. Conclusion
The CRS Endoluminal Brush does not raise any issues of safety or effectiveness compared to the predicate device because it is in fact the predicate device..
{2}------------------------------------------------
## Indications for Use
510(k) Number K050889
Device Name: CRS Endoluminal Brush
Indications For Use:
The CRS Endoluminal Brush is intended to collect a biofilm or fibrin sample, which is The CNS Endoluminal Brain is inter lumen surface of an in-dwelling central venous catheter
Prescription Use _____________________________________________________________________________________________________________________________________________________________ (Part 21 CFR 801 Subpart D)
AND/OR AND/OR AND/OR
Over-The-Counter Use _________________________________________________________________________________________________________________________________________________________ (21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Page 1 of 1
{3}------------------------------------------------
Image /page/3/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo consists of a stylized caduceus symbol, which is a staff with two snakes coiled around it, enclosed within a circle. The text "DEPARTMENT OF HEALTH AND HUMAN SERVICES - USA" is written around the perimeter of the circle.
AUG 26 2005
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
CRS Medical Diagnostics, Incorporated C/O Daniel Kamm, P.E. Regulatory Engineer Kamm & Associates P.O. Box 7007 Deerfield, Illinois 60015
Re: K050889
Trade/Device Name: CRS Endoluminal Brush Regulation Number: 21 CFR 880.5970 Regulation Name: Percutaneous, Implanted, Long-term Intravascular catheter Regulatory Class: II Product Code: LJS Dated: June 22, 2005 Received: June 27, 2005
Dear Mr. Kamm:
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 aga\inst misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), 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 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
{4}------------------------------------------------
Page 2 - Mr. Kamm
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); 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.
This letter will allow you to begin marketing your device as described in your Section 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 vour device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at (240) 276-0115. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). 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) 443-6597 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Susan Punno
for Chiu Lin, Ph.D.
Chiu Lin, Ph.D. Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{5}------------------------------------------------
K050889
### Indications for Use
510(k) Number K050889
Device Name: CRS Endoluminal Brush
Indications For Use:
The CRS Endoluminal Brush is intended to collect a biofilm or fibrin sample, which is suitable for microbiological analysis, from the inner lumen surface of an in-dwelling central venous catheter
Prescription Use X (Part 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use (21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Page 1 of 1
Anton Vm
(Division Sign-Off) (Division Sign-Off)
Division of Anesthesiology, General Hospital, Division of Ancotheolorsion of Antal Devices
510(k) Number _
Predicate graph will load when search results are available.
Embedding visualization will load when search results are available.
PDF viewer will load when search results are available.
Loading panels...
Select an item from Submissions
Click any panel, subpart, regulation, product code, or device to see details here.
Section Matches
Results will appear here.
Product Code Matches
Results will appear here.
Special Control Matches
Results will appear here.
Loading collections...
Loading
My Alerts
You will receive email notifications based on the filters and frequency you set for each alert.
Sort by:
Create Alert
Search Filters
Agent Token
Create a read-only bearer token for Claude, ChatGPT, or other agents that can call HTTP APIs.
Copy this now. It will not be shown again.
Connected apps
Apps you authorized through browser sign-in. Disconnecting revokes their access immediately.
Learn the FDA Browser
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.