K211519 · Cycle, LLC · HEB · Aug 13, 2021 · Obstetrics/Gynecology
Device Facts
Record ID
K211519
Device Name
Every Cycle Reusable Tampon Applicator
Applicant
Cycle, LLC
Product Code
HEB · Obstetrics/Gynecology
Decision Date
Aug 13, 2021
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 884.5470
Device Class
Class 2
Indications for Use
Every Cycle™ Reusable Tampon Applicator is intended to be used to insert a digital menstrual tampon into the vagina.
Device Story
Reusable, non-sterile manual applicator for digital menstrual tampons; intended for over-the-counter use by individuals. Device consists of barrel with slit, plunger, large outer cap, storage compartment, and small cap. User manually loads digital tampon into applicator, inserts into vagina, and uses plunger to deploy tampon. Device is reusable for up to two years; requires cleaning with unscented soap after each use and sanitization in boiling water after each cycle. Provides a mechanical aid for tampon insertion; does not include tampon. Benefits include reusable alternative to single-use applicators.
Clinical Evidence
Bench testing only. Testing included use-life, device weight, dimensions, and functional evaluations (tampon compatibility, ejection force, uncapping force). Biocompatibility testing performed per ISO 10993-1, including cytotoxicity (ISO 10993-5), vaginal irritation (ISO 10993-10), and guinea pig maximization (ISO 10993-10).
Technological Characteristics
Manual, non-sterile, reusable applicator. Components: barrel, plunger, caps, storage compartment. Materials evaluated for biocompatibility per ISO 10993-1. Cleaning/sanitization per FDA reprocessing guidance. Two-year use-life. No electronic components or software.
Indications for Use
Indicated for use by individuals requiring assistance with the insertion of digital menstrual tampons into the vagina.
Regulatory Classification
Identification
An unscented menstrual tampon is a device that is a plug made of cellulosic or synthetic material that is inserted into the vagina and used to absorb menstrual or other vaginal discharge. This generic type of device does not include menstrual tampons treated with scent (i.e., fragrance materials) or those with added antimicrobial agents or other drugs.
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August 13, 2021
Cycle, LLC % Gabriela McCoole Quality and Regulatory Consultant NJK & Associates, Inc. 13721 Via Tres Vista San Diego, CA 92129
Re: K211519
> Trade/Device Name: Every Cycle™ Reusable Tampon Applicator Regulation Number: 21 CFR§ 884.5470 Regulation Name: Unscented menstrual tampon Regulatory Class: II Product Code: HEB, HIL Dated: May 13, 2021 Received: May 17, 2021
Dear Gabriela McCoole:
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. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. 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.
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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 and Part 809); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatoryinformation/postmarketing-safety-reporting-combination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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 https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
for
Monica D. Garcia, Ph.D. Assistant Director DHT3B: Division of Reproductive. Gynecology and Urology Devices OHT3: Office of GastroRenal, ObGyn, General Hospital and Urology Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
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## Indications for Use
510(k) Number (if known)
#### K211519
Device Name Every Cycle™ Reusable Tampon Applicator
Indications for Use (Describe)
Every Cycle™ Reusable Tampon Applicator is intended to be used to insert a digital menstrual tampon into the vagina.
Type of Use (Select one or both, as applicable)
| Prescription Use (Part 21 CFR 801 Subpart D)
X Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) Summary
| Sponsor: | Cycle, LLC<br>1927 Washington Avenue<br>Santa Monica, Ca 90403 |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Contact Person: | Gabriela McCoole<br>Consultant<br>NJK & Associates, Inc.<br>13721 Via Tres Vista<br>San Diego, CA 92129 USA<br>Phone: (619) 322-7535<br>Fax: (858) 764-9739<br>Email: GMcCoole@njkconsulting.com |
Date Prepared: August 11, 2021
#### DEVICE INFORMATION:
| Proprietary Name: | Every Cycle™ Reusable Tampon Applicator |
|--------------------|------------------------------------------------------|
| Regulation Number: | 21 CFR 884.5470 |
| Regulation Name: | Unscented menstrual tampon |
| Regulatory Class: | II |
| Product Codes: | HEB (tampon, menstrual, unscented) |
| | HIL (scented or scented deodorized menstrual tampon) |
### PRODUCT DESCRIPTION:
The Every Cycle™ Reusable Tampon Applicator is a non-sterile, single user reusable device. It is intended to be sold on its own, without a pre-loaded tampon. The applicator requires the user to load the applicator with a legally-marketed digital/non-applicator menstrual tampon. The use-life of the subject device is two years.
The applicator is comprised of a barrel with a slit, plunger, large (outer) cap, storage compartment, and a small cap.
### INDICATIONS FOR USE:
Every Cycle™ Reusable Tampon Applicator is intended to insert a digital menstrual tampon into the vagina.
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## PREDICATE DEVICE:
The selected predicate device, the re.t.a™ Reusable Tampon Applicator was cleared on August 20, 2018. Thinx Inc, is the owner of the predicate 510(k), K180850.
The predicate device has not been subject to a design-related recall.
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# COMPARISON OF TECHNOLOGICAL CHARACTERISTICS WITH THE PREDICATE DEVICE:
Table 1 is a detailed comparison of the Every Cycle ™ Reusable Tampon Applicator with its predicate device.
| Characteristic | Subject Device | Predicate Device (K180850) | Comparison<br>Evaluation |
|--------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Product Name | Every CycleTM Reusable Tampon Applicator | re.t.aTM Reusable Tampon Applicator | N/A |
| Manufacturer | Cycle LLC | Thinx Inc | N/A |
| Product Code | HEB (Unscented Menstrual Tampon) and HIL<br>(Scented or Scented Deodorized Menstrual<br>Tampon) | HEB (Unscented Menstrual Tampon) and HIL<br>(Scented or Scented Deodorized Menstrual<br>Tampon) | Same |
| Intended Use/<br>Indications for Use | The Every CycleTM Reusable Tampon applicator is<br>intended to be used to insert a digital menstrual<br>tampon into the vagina. | The re.t.aTM reusable tampon applicator is intended<br>to be used to insert a digital menstrual tampon into<br>the vagina. | Same, other than product<br>name |
| Design | Barrel with slit, plunger, large (outer) cap, storage<br>compartment, and small cap.<br>Applicator only, does not include tampon. | Sleeve with slit, pusher, and outer cover.<br>Applicator only, does not include tampon. | Different. Subject and<br>predicate device barrel and<br>sleeve design differs.<br>Predicate does not have a<br>storage compartment. This<br>difference is minor and<br>does not raise different<br>issues of safety or<br>effectiveness. |
| Reuse life | 2 years | 2 years | Identical. |
| Tampon Compatibility | Compatible with Super Plus, Super, Regular, and<br>Light absorbency digital tampons. Not for use with<br>Ultra absorbency digital tampons. | Compatible with most digital tampons. | Similar; the subject device<br>is not compatible with the<br>largest size. |
| Usability | Reusable | Reusable | Identical |
| | | | Table 1 Comparison of the Every Cycle ™ Reusable Tampon Applicator and its predicate | | | | |
|--|--|--|--------------------------------------------------------------------------------------|--|--|--|--|
| | | | | | | | |
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## K211519 Page 4 of 4
#### PERFORMANCE DATA
The following tests demonstrate that the proposed subject device met the applicable design and performance requirements:
- Use-life testing
- Device weight ●
- Dimensions
- Functional evaluation, including: ●
- Tampon compatibility о
- Ejection force о
- o Uncapping force
- Biocompatibility per the 2020 FDA guidance document "Use of International ● Standard ISO 10993-1, "Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process""
- o Cytotoxicity per ISO 10993-5: 2009/(R)2014
- o Vaginal irritation per ISO 10993-10:2010
- o Guinea pig maximization per ISO 10993-10:2010
### STERILIZATION & SHELF LIFE TESTING
The cleaning instructions provided for the Every Cycle™ Reusable Tampon Applicator were developed per the recommendations in the 2015 FDA guidance document "Reprocessing Medical Devices in Health Care Settings: Validation Methods and Labeling." The Every Cycle™ Reusable Tampon Applicator should be washed with unscented soap after every use and sanitized in boiling water after every cycle.
The Every Cycle™ Reusable Tampon Applicator is not provided sterile and is not intended to be sterilized by users. The Every Cycle™ Reusable Tampon Applicator was tested in its expected shipping conditions and verified that the device and its packaging can tolerate the expected shipping stress.
### CONCLUSION
The subject and predicate devices have the same intended use and the technological differences do not raise different questions of safety or effectiveness. The performance data provided demonstrate the subject device is substantially equivalent to the predicate device.
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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
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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.
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.