K043244 · Fresenius Medical Care North America · KDI · Dec 20, 2004 · Gastroenterology, Urology
Device Facts
Record ID
K043244
Device Name
FRESENIUS OPTIFLUX F20NR, FF18NR, F16NR
Applicant
Fresenius Medical Care North America
Product Code
KDI · Gastroenterology, Urology
Decision Date
Dec 20, 2004
Decision
SESE
Submission Type
Special
Regulation
21 CFR 876.5860
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
Optiflux F20NR , F18NR , and F16NR dialyzers are designed for single use acute and chronic hemodialysis.
Device Story
Single-use hemodialyzers; used for acute and chronic hemodialysis; function as extracorporeal blood filters; e-beam sterilized; designed for clinical use; replaces function of failed kidneys by removing waste products and excess fluid from blood; operated by trained healthcare professionals in clinical settings.
Clinical Evidence
No clinical data provided; substantial equivalence supported by design, construction, and material comparisons to predicate devices.
Technological Characteristics
Hollow fiber capillary dialyzer; e-beam sterilization; low-flux configuration; intended for single use; Class II medical device.
Indications for Use
Indicated for patients requiring acute or chronic hemodialysis.
Regulatory Classification
Identification
A high permeability hemodialysis system is a device intended for use as an artificial kidney system for the treatment of patients with renal failure, fluid overload, or toxemic conditions by performing such therapies as hemodialysis, hemofiltration, hemoconcentration, and hemodiafiltration. Using a hemodialyzer with a semipermeable membrane that is more permeable to water than the semipermeable membrane of the conventional hemodialysis system (§ 876.5820), the high permeability hemodialysis system removes toxins or excess fluid from the patient's blood using the principles of convection (via a high ultrafiltration rate) and/or diffusion (via a concentration gradient in dialysate). During treatment, blood is circulated from the patient through the hemodialyzer's blood compartment, while the dialysate solution flows countercurrent through the dialysate compartment. In this process, toxins and/or fluid are transferred across the membrane from the blood to the dialysate compartment. The hemodialysis delivery machine controls and monitors the parameters related to this processing, including the rate at which blood and dialysate are pumped through the system, and the rate at which fluid is removed from the patient. The high permeability hemodialysis system consists of the following devices:(1) The hemodialyzer consists of a semipermeable membrane with an in vitro ultrafiltration coefficient (K uf ) greater than 8 milliliters per hour per conventional millimeter of mercury, as measured with bovine or expired human blood, and is used with either an automated ultrafiltration controller or anther method of ultrafiltration control to prevent fluid imbalance.(2) The hemodialysis delivery machine is similar to the extracorporeal blood system and dialysate delivery system of the hemodialysis system and accessories (§ 876.5820), with the addition of an ultrafiltration controller and mechanisms that monitor and/or control such parameters as fluid balance, dialysate composition, and patient treatment parameters (e.g., blood pressure, hematocrit, urea, etc.). (3) The high permeability hemodialysis system accessories include, but are not limited to, tubing lines and various treatment related monitors (e.g., dialysate pH, blood pressure, hematocrit, and blood recirculation monitors).
Special Controls
*Classification.* Class II. The special controls for this device are FDA's:(1) “Use of International Standard ISO 10993 ‘Biological Evaluation of Medical Device—Part I: Evaluation and Testing,’ ”
(2) “Guidance for the Content of 510(k)s for Conventional and High Permeability Hemodialyzers,”
(3) “Guidance for Industry and CDRH Reviewers on the Content of Premarket Notifications for Hemodialysis Delivery Systems,”
(4) “Guidance for the Content of Premarket Notifications for Water Purification Components and Systems for Hemodialysis,” and
(5) “Guidance for Hemodialyzer Reuse Labeling.”
{0}------------------------------------------------
Image /page/0/Picture/1 description: The image shows a geometric figure that resembles a funnel or a series of stacked, truncated pyramids. The figure is oriented with the widest section at the top and narrows down towards the bottom, ending in a sharp point. There are four distinct layers or sections, each separated by a horizontal line, creating a tiered effect. The figure is drawn in black and white, with bold lines outlining the shape and defining the different sections.
KOL-3244-
PAGE 1 OF 3
# Fresenius Medical Care
## Fresenius Optiflux F20NR , F18NR and F16NR Single Use Hemodialyzers "Special" 510(k) Premarket Notification Summary of Safety and Effectiveness
This 510(k) Summary of Safety and Effectiveness is being submitted in accordance with the requirements of SMDA 1990.
#### A. Submitter's Information:
| Name: | Fresenius Medical Care North America |
|----------------------|--------------------------------------------------------------|
| Address: | 95 Hayden Ave<br>Two Ledgemont Center<br>Lexington, MA 02420 |
| Phone: | 1-781-402-9068 |
| Fax: | (781) 402-9635 |
| Contact Person: | Arthur Eilinsfeld, Director of Regulatory Affairs |
| Date of Preparation: | 19 November, 2004 |
#### B. Device Name:
| Proprietary Name: | Fresenius Optiflux F20NR e, F18NRe and<br>F16NRe Hemodialyzers |
|-------------------|----------------------------------------------------------------|
|-------------------|----------------------------------------------------------------|
#### Common Name:
| • Optiflux F20NRe and Optiflux F18NRe: | Dialyzer, High Permeability with or without Sealed Dialysate System |
|-------------------------------------------|---------------------------------------------------------------------|
| • Optiflux F16NRe: | Dialyzer, Capillary, Hollow Fiber |
| <b>Product Code/Classification Panel:</b> | |
| • Optiflux F20NRe and Optiflux F18NRe: | 78KDI/Gastroenterology-Urology |
| • Optiflux F16NRe: | 78FJI/Gastroenterology-Urology |
| <b>Classification:</b> | |
| • Optiflux F20NRe and Optiflux F18NRe: | Class II per §876.5860 |
| • Optiflux F16NRe: | Class II per §876.5820 |
Image /page/0/Picture/12 description: The image shows the number 000042. The numbers are in a bold, sans-serif font. The numbers are all aligned horizontally and are evenly spaced apart. The image is black and white.
{1}------------------------------------------------
Image /page/1/Picture/0 description: The image shows the text "KOL-3244 PAGE 2 CF 3". The text appears to be handwritten. The text "PAGE 2 CF 3" indicates that this is page 2 of 3.
# Fresenius Medical Care
## Fresenius Optiflux F20NR , F18NR and F16NR Single Use Hemodialyzers "Special" 510(k) Premarket Notification Summary of Safety and Effectiveness
#### C. Predicate Devices
The Fresenius Optiflux F20NR , F18NR , and F16NR8 are modified versions of the Fresenius Optiflux 200NR and Fresenius Hemoflow F7NR®, which were cleared under the following premarket notifications:
#### Optiflux 200NR:
- K002277 (8/25/00) .
#### Hemoflow F7NR®
- · #K002761 (12/04/00)
#### D. Indications for Use/Intended Use
Optiflux F20NR®, F18NR®, and F16NR® dialyzers are designed for single use acute and chronic hemodialysis.
#### E. Substantial Equivalence:
#### 1. Is the product a device?
YES - The Fresenius Optiflux F20NR , F18NR , and F16NR® hemodialyzers are devices pursuant to 21 CFR §201 [321] (h).
#### 2. Does the new device have the same intended use?
YES ~ The intended use for the Optiflux F20NR , F18NR , and F16NR , hemodialyzers is equivalent to that for the Fresenius Optiflux 200NR and is as follows:
#### Optiflux F20NR®, F18NR®, and F16NR® - Intended Use
Optiflux F20NR , F18NR , and F16NR dialyzers are designed for single use acute and chronic hemodialysis.
#### Fresenius Optiflux 200NR - Intended Use
Optiflux 200NR dialyzers are designed for acute and chronic hemodialysis and are appropriate for single and multiple use.
Image /page/1/Figure/20 description: The image shows a sequence of numbers, specifically "000043". The numbers are printed in a bold, sans-serif font, and they appear to be stamped or printed with some slight imperfections, giving them a somewhat aged or vintage look. The digits are evenly spaced and aligned horizontally.
{2}------------------------------------------------
Image /page/2/Picture/0 description: The image shows the text "K043244", followed by the text "PAGE 3 OF 3" on the line below. The text appears to be handwritten. The text is written in black ink on a white background.
Image /page/2/Picture/1 description: The image shows the logo for Fresenius Medical Care. The logo consists of a geometric shape resembling an inverted pyramid with horizontal lines inside, positioned above the text "Fresenius Medical Care". The text is in a simple, sans-serif font and is the primary identifier for the brand.
## Fresenius Optiflux F20NR , F18NR and F16NR Single Use Hemodialyzers "Special" 510(k) Premarket Notification Summary of Safetv and Effectiveness
#### 3. Does the device have technological characteristics that raise new types of safety or effectiveness questions?
NO - The Optiflux F20NR , F18NR , and F16NR are e-beam sterilized, low-flux versions of the Optifiux 200NR. The technological characteristics of the Optiflux F20NR®, F18NR°, and F16NR° are equivalent to those of the Optiflux 200NR and Hemoflow F7NR8 and raise no new types of safety or effectiveness questions.
#### 4. Does descriptive or performance information demonstrate equivalence?
YES - Fresenius Medical Care North America believes that the information provided in this submission clearly describes the Optiflux F20NR, and and demonstrates that they are substantially equivalent to the F16NR® Fresenius Optiflux 200NR and Hemoflow F7NR®.
#### F. Safety Summary
The Optiflux F20NR°, F18NR°, and F16NR° dialyzers are substantially equivalent in construction, design, materials, and intended use to the commercially available Fresenius F7NR® and Fresenius Optiflux 200NR dialyzers. In addition, testing of the Optiflux F20NR , F18NR , and F16NR indicates that they are safe and effective for their intended use.
0000-3
00004
{3}------------------------------------------------
Image /page/3/Picture/2 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a stylized eagle or bird-like figure with flowing lines, representing the department's mission. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" is arranged in a circular fashion around the bird-like figure. The logo is black and white.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
DEC 2 0 2004
Ms. Nichole Riek Regulatory Affairs Supervisor Fresenius Medical Care North America 95 Hayden Avenue LEXINGTON MA 02420
Re: K043244
Trade/Device Name: Fresenius Optiflux 20NR, 18NR and 16NRt Hemodialyzers Regulation Number: 21 CFR §876.5860 Regulation Name: High permeability hemodialysis system Product Code: 78 KDI Regulation Number: 21 CFR §876.5820 Regulation Name: Hemodialysis system and accessories Product Code: 78 FJI Regulatory Class: II Dated: November 19, 2004 Received: November 23, 2004
Dear Ms. Riek:
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.
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 may 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); 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.
{4}------------------------------------------------
This letter will allow you to begin marketing your device as described in your Section 510(k) I mis letter with anow you'ts begin matter of substantial equivalence of your device to a legally prematication. "The PDF machassification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please If you debite specific acries at one of the following numbers, based on the regulation number at the top of this letter:
| 21 CFR 876.xxxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|-----------------|----------------------------------|--------------|
| 21 CFR 884.xxxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 892.xxxx | (Radiology) | 240-276-0120 |
| Other | | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). You may obtain other general information on your responsibilities under the Act from the 00 : 77). " Cormal Manufacturers, International and Consumer Assistance at its toll-free number (800) D1 rison or climit in and on or at its Internet address http://www.fda.gov/cdrb/dsmaldsmamain.html
Sincerely yours,
Nancy C. brogdon
Nancy C. Brogdon Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{5}------------------------------------------------
# Indications for Use
510(k) Number (if known):
K043244
Device Name:
Fresenius Optiflux F20NR®, F18NR®, and F16NR® Hemodialyzers
Indications For Use:
Optiflux F20NR , F18NR , and F16NR dialyzers are designed for single use acute and chronic hemodialysis.
Prescription Use _ (Part 21 CFR 801 Subpart D)
AND/OR
Over-The-Counter Use _ (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
David G. Legarra
(Division Sign-Off) Division of Reproductive, Abdominal, and Radiological Devices 510(k) Number .
Page 1 of ____________________________________________________________________________________________________________________________________________________________________
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.