The Zephyr™ Vascular Compression Devices are indicated for use by medical professionals to promote hemostasis following a catheterization or other puncture into a blood vessel in a patient's arm or leg, including: radial, brachial, dorsalis pedis, or tibial blood vessels, arterial or venous line or sheath removal, hemodialysis, and in anticoagulation therapy.
Device Story
Zephyr Vascular Compression Device is a single-use, sterile, inflatable strap applied to patient limbs by clinicians to promote hemostasis at vascular puncture sites. Device consists of biocompatible multi-layer PVC film, PVC tubing, and thermoplastic syringe/valve assembly; secured via hook-and-loop material. Clinician wraps strap around limb and inflates cuff balloon to apply localized pressure to puncture site. Output is mechanical compression; assists in achieving hemostasis post-procedure. Benefits include controlled, localized pressure to manage bleeding in post-catheterization or anticoagulated patients.
Clinical Evidence
No clinical data. Bench testing only. Preclinical testing included compression, deployment, inflation/deflation, syringe plunger force, airflow, and air volume testing. Biocompatibility testing (cytotoxicity, sensitization, irritation) conducted per ISO 10993. All tests met acceptance criteria.
Technological Characteristics
Materials: Biocompatible multi-layer PVC film, PVC tube, thermoplastic syringe/valve. Sensing/Actuation: Inflatable balloon for mechanical compression. Form factor: Strap (1.5" x 8.25" or 9.5") with hook-and-loop closure. Sterilization: Sterile. Connectivity: None. Software: None.
Indications for Use
Indicated for patients undergoing catheterization or vascular puncture in arm or leg (radial, brachial, dorsalis pedis, tibial) requiring hemostasis, including those undergoing arterial/venous line/sheath removal, hemodialysis, or anticoagulation therapy.
Regulatory Classification
Identification
A vascular clamp is a surgical instrument used to occlude a blood vessel temporarily.
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is a stylized image of three human profiles facing to the right, with flowing lines representing hair or clothing.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
July 31, 2015
Advanced Vascular Dynamics Matthew Semler President 4252 SE International Way, Suite F Milwaukie, Oregon 97222
Re: K151363
Trade/Device Name: Zephyr Vascular Compression Device Regulation Number: 21 CFR 870.4450 Regulation Name: Vascular Clamp Regulatory Class: Class II Product Code: DXC Dated: May 15, 2015 Received: May 21, 2015
Dear Mr. Semler:
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.
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 devicerelated 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.
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If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education 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. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 Industry and Consumer Education 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,
M.A. Hillebrenner
for Bram D. Zuckerman, M.D.
Director Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## Indications for Use
510(k) Number (if known) K151363
Device Name
Zephyr™ Vascular Compression Devices
#### Indications for Use (Describe)
The Zephy™ Vascular Compression Devices are indicated for use by medical professionals to promote hemostasis following a catheterization or other puncture into a blood vessel in a patient's arm or leg, including: radial, dorsalis pedis, or tibial blood vessels, arterial or venous line or sheath removal, hemodialysis, and in anticoagulation therapy.
| Type of Use (Select one or both, as applicable) | |
|-----------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------|
| <span style="font-family: Arial;">☑</span> Prescription Use (Part 21 CFR 801 Subpart D) | <span style="font-family: Arial;">☐</span> Over-The-Counter Use (21 CFR 801 Subpart C) |
#### CONTINUE ON A SEPARATE PAGE IF NEEDED.
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# 510(k) Summary
| Submitter's name: | Advanced Vascular Dynamics |
|-------------------|-----------------------------------|
| | 4252 SE International Way, Ste. F |
| | Milwaukie, OR 97222 |
| Contact name and address: | Matthew Semler, President |
|---------------------------|-----------------------------------|
| | 4252 SE International Way, Ste. F |
| | Milwaukie, OR 97222 |
| | (503-223-2333 ext. 382) |
Date summary prepared: 23 July 2015
Device name:
| Proprietary name: | Zephyr ™ Vascular Compression Devices |
|-----------------------|-------------------------------------------------|
| Common or usual name: | Vascular compression device |
| Classification name: | Vascular clamp (870.4450), Vascular clamp (DXC) |
Legally marketed device for substantial equivalence comparison:
The predicate devices for this submission are the TR Band from Terumo International Systems (K070423), Vasc Band from Lepu Medical Technologies (K111831), and RadAR Vascular Compression Devices from Advanced Vascular Dynamics (K142122).
#### Description of the device:
The Zephyr™ Vascular Compression Devices are external compression devices deployed on a patient's arm or leg to promote hemostasis at a puncture site in a blood vessel. The Zephyr™ devices are single-use, sterile, individually pouched inflatable devices, deployed onto a skin surface by clinicians to help achieve hemostasis for vascular puncture sites in post-procedure patients. Zephyr is available in different lengths, with and without a separate cuff balloon. The strap measures approximately 1.5" x 8.25" (small) or 9.5" (large) and is composed of biocompatible multiple-layer PVC film and PVC tube, and a syringe and valve made of biocompatible thermoplastics. Hook and loop material is used to secure the strap in position. Only the PVC film comes into contact with broken skin.
Intended use of the device:
The Zephyr™ Vascular Compression Devices are indicated for use by medical professionals to promote hemostasis following a catheterization or other puncture into a blood vessel in a patient's arm or leg, including: radial, brachial, dorsalis pedis, or tibial blood vessels, arterial or venous line or sheath removal, hemodialysis, and in anticoagulation therapy.
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#### Technological characteristics:
The device features of the Zephyr™ Vascular Compression Devices and the predicate TR Band Device and the Vasc Band are similar, in that all three are straps applied around a limb and use inflated balloons to apply compression to a limb, applying pressure to underlying vasculature. The RadAR predicate device also applies compression to a limb, using a mechanical means.
### Testing conducted:
Zephyr Vascular Compression devices were subjected to inspections and tests to determine that the product met specifications.
### Performance Testing:
Inflation of the Zephyr strap and cuff assemblies was verified and application of compression was verified.
### Preclinical Testing:
Preclinical testing, including compression testing, deployment testing, inflation and deflation testing, syringe plunger force, syringe airflow testing, and syringe air volume testing was conducted to confirm the device would function as intended. All testing passed acceptance criteria and demonstrated that the performance of the Zephyr™ Vascular Compression Devices is equivalent to the predicate devices. Biocompatibility included cytotoxicity, sensitization, and irritation testing and was conducted in accordance with ISO 10993. All tests demonstrated the materials and processes used in the design and manufacture of the devices are non-cytotoxic, non-sensitizing and non-irritants.
#### Conclusion:
The Zephyr™ Vascular Compression Devices passed all testing and are substantially equivalent to the indicated predicate devices, base upon the preclinical testing.
The Zephyr™ Vascular Compression Devices are deemed suitable for the stated intended use.
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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.
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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.
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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.
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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.
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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.
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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.
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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.