K100446 · Devon Medical, Inc. · JOW · Mar 5, 2010 · Cardiovascular
Device Facts
Record ID
K100446
Device Name
CIRCUFLOW 5100 SEQUENTIAL COMPRESSION DEVICE
Applicant
Devon Medical, Inc.
Product Code
JOW · Cardiovascular
Decision Date
Mar 5, 2010
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 870.5800
Device Class
Class 2
Attributes
Therapeutic, 3rd-Party Reviewed
Indications for Use
The CircuFlow 5100 is a sequential gradient compression pneumatic device, intended for the primary or adjunctive treatment of primary or secondary lymphedema. The device is also intended for the additional or alternate treatment of venous insufficiency, and chronic venous static ulcers associated with venous insufficiency, as well as general treatment of swelling of the extremities. The device is intended for home or hospital use.
Device Story
CircuFlow 5100 is a sequential pneumatic compression device for limb swelling; consists of a manual pneumatic pump and a 4-chamber limb sleeve. Operates by applying gradient pressurization (distal to proximal) to limbs; distal chambers inflated to higher pressure than proximal ones to prevent reverse gradient flow. Pressure (0-120mmHg) and treatment time (30 min to continuous) are user-adjustable via pump regulator; factory-set pressure reduction for chambers 2-4. Calibrated dial gauge (0-200 mmHg) displays pressure. Used in home or hospital settings by patients or clinicians. Provides therapeutic compression to manage lymphedema, venous insufficiency, and stasis ulcers.
Clinical Evidence
Bench testing only. Performance testing included electrical safety (dielectric strength, leakage current), gradient performance, pressure performance, garment tensile strength, and material biocompatibility (cytotoxicity, sensitization, irritation/intracutaneous reactivity).
Technological Characteristics
Pneumatic compression system; 4-chamber sleeve; electrically generated compressed air; 0-120 mmHg pressure range; 0-200 mmHg dial gauge. Conforms to IEC 60601-1-1, IEC 60601-1-2, UL 60601-1, ISO 10993, ISO 14971. Materials tested for biocompatibility per ISO 10993.
Indications for Use
Indicated for patients requiring treatment for primary or secondary lymphedema, venous insufficiency, chronic venous stasis ulcers, or general extremity swelling. Intended for home or hospital use.
Regulatory Classification
Identification
A compressible limb sleeve is a device that is used to prevent pooling of blood in a limb by inflating periodically a sleeve around the limb.
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K100446
MAR - 5 2010
# 510(K) SUMMARY
## Submitter:
Devon Medical, Inc.
## Contact Person:
Ruth Wu, COO 1100 First Avenue, Suit 100
King of Prussia, PA 19406
Phone: 800.571.3135
Fax: 484.636.3380
### Common Classification & Proprietary Names:
Common Names: Sequential Compression Device Proprietary Name: CircuFlow 5100
#### Date Prepared:
December 31st 2009
### Classification
The classification name, 21 CFR Part and Paragraph number, product code and classification of the CircuFlow 5100.
| Classification Name | 21 CFR Section | Product Code | Class |
|--------------------------|----------------|--------------|-------|
| Compressible Limb Sleeve | 870.5800 | JOW | II |
### Predicate Devices:
The CircuFlow 5100 Sequential Compression Device is substantially equivalent to the following.
| Predicate Device | Manufacturer | 510(k)# |
|-----------------------------------------|------------------------------|---------|
| SC-3008 Sequential Circulator | Bio Compression Systems Inc. | K043423 |
| GS-128 Sequential Compression<br>System | MedMark Technologies | K050584 |
## Device Description
The CircuFlow 5100 is a sequential pneumatic compression device designed to apply compression to a limb. The device is composed of two components:
- Pneumatic manual pump
- · Limb sleeve or garment composes of 4 chambers
The CircuFlow 5100 enables different treatment pressures (0-120mmHg) and treatment times (30 minutes to continue) that should be used according to physician prescription. When activated, air flows into chamber, the pump provides gradient pressurization to the chambers (sequential inflation of distal to proximal, with distal chambers inflated to a greater pressure than the proximal ones).
After each chamber is inflated, the pressure is held constant until all chambers are inflated, in
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# SECTION 5
order to prevent reverse gradient flow. Once all chambers are inflated, they are then all released simultaneously, and the cycle repeats. Pressure within chambers are adjustable -pressure to chamber 1 is controlled by user-adjusted regulator on the pump. Pressure in chambers 2, 3 & 4 are individually lowered according to the default factory settings.
A calibrated dial gauge displays pressure in the range of 0-200 mmHg.
Garments are available in 8 sizes, and custom garments are available in variations from standard sizes.
#### Intended Use:
The CircuFlow 5100 is a sequential gradient compression pneumatic device, intended for the primary or adjunctive treatment of primary or secondary lymphedema. The device is also intended for the additional or alternate treatment of venous insufficiency, and chronic venous static ulcers associated with venous insufficiency, as well as general treatment of swelling of the extremities. The device is intended for home or hospital use.
#### Technological Characteristics:
The manufacturer believes that the technological characteristic of the CircuFlow 5100 are substantially similar to those of the predicate devices.
The CircuFlow 5100 has very similar components to its predicate devices and very similar principles of operation. The device consists of an electrically generated source of compressed air, tubing to convey the pressurized air to the sleeve, like the predicates, pressure is applied cyclically for a specified period of time, according to the physician's prescription.
#### Performance Testing
Bench and laboratory testing was performed and assures that the product meets its specifications. The manufacturer believes that the technological characteristics of the CircuFlow 5100 are substantially similar to those of the predicate devices. The performance testing includes the following tests:
| Electrical Safety Tests |
|-----------------------------------------------|
| Dielectric Strength Test |
| Leakage Current Test |
| Gradient Performance Test |
| Garment Tests |
| Pressure Performance Test |
| Tensile Strength Test |
| Material Biocompatibility Tests |
| Cytotoxicity Test |
| Sensitization Test |
| Irritation and Intracutaneous Reactivity Test |
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## Standards
The CircuFlow 5100 conforms to the following standards: IEC 60601-1-1 IEC 60601-1-2 UL 60601-1 ISO 10993 ISO 14971
## Statement of Substantial Equivalence
The CircuFlow 5100 is substantially equivalent in technology, function, operating parameters, and intended use to predicate devices that are currently commercially available and in distribution, and does not raise any new questions of safety or effectiveness.
#### Conclusions
In accordance with the Federal Food, Drug and Cosmetic Act and 21 CFR Part 807, and based on the information provided in this pre-market notification, Devon Medical Inc, believes that the CircuFlow 5100, is safe and effective and substantially equivalent to the predicate devices as described herein.
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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 circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized image of an eagle or other bird with its wings spread, rendered in a simple, abstract design.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room W-066-0609 Silver Spring, MD 20993-0002
MAR - 5 2010
Devon Medical Inc. c/o Mr. Mark Job Regulatory Reviewer Regulatory Technology Services, LLC 1394 25th Street, NW Buffalo, MN 55313
Re: K100446 Circuflow 5100 Sequential Compression Device Regulation Number: 21 CFR 870.5800 Regulation Name: Compressible Limb Sleeve Regulatory Class: Class II (two) Product Code: JOW Dated: February 16, 2010 Received: February 17, 2010
Dear Mr. Job:
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 may publish further announcements concerning your device in the Federal Register.
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Page 2 - Mr. Mark Job
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 (reporting of medical device-related 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/CDRHQffices/ucm115809.html 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/ReportalProblem/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/ResourcesforYou/Industry/default.htm.
Sincerely yours,
Duna R. Ladner
Image /page/4/Picture/7 description: The image shows a signature next to the letters 'Br' and 'Di'. The signature is illegible, but it appears to be a cursive signature. The letters 'Br' and 'Di' are in a simple font and are aligned vertically. The image is black and white and has a simple composition.
Bram D. Zuckerman, M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# INDICATIONS FOR USE STATEMENT
K100446 510(k) Number (if known):
Device Name: the Devon CircuFlow 5100 Sequential Compression Device
Indications for Use:
The CircuFlow 5100 Sequential Compression Device is a manual, sequential, pneumatic compression device, intended for the primary or adjunctive treatment of primary or secondary lymphedema. The device is also intended for the additional or alternate treatment of venous insufficiency, and chronic venous stasis ulcers associated with venous insufficiency, as well as general treatment of swelling of the extremities.
The device is intended for home or hospital use.
Prescription Use × (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)
sumer D. Vcliner
(Division Sign-Off) Division of Cardiovascular Devices
510(k) Number_ki 00446
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.