This system is intended to be used to drill a small tangential hole in or to thin the zona pellucida of the embryo in selected in vitro fertilization (IVF) patients with otherwise poor prognosis for successful pregnancy outcome, such as advanced maternal age, prior failed IVF procedures, cryopreserved embryos, or abnormal zona pellucida morphology, and in IVF patients undergoing PGD to avoid genetic disease or aneuploidy.
Device Story
ZILOS-tk and LYKOS are infrared laser systems used in reproductive laboratories to drill holes in or thin the embryo zona pellucida (ZP) for assisted hatching or biopsy (PGD/trophectoderm-cell extraction). ZILOS-tk mounts on an inverted microscope turret; LYKOS integrates the laser within a 40X objective. Both use an IR laser (1450-1480 nm) to locally heat and liquefy the ZP. A visible 'RED-i' beam provides target alignment. Operators (embryologists) use a footswitch to trigger laser pulses. A multi-pulse mode allows sequential firing to facilitate cell junction weakening. Output is a localized thermal effect on the embryo. Benefits include improved access for biopsy and assisted hatching, potentially increasing pregnancy success rates in patients with poor prognosis.
Clinical Evidence
Bench testing only. Verification and validation performed on image quality, laser focus, ZP penetration, and software. Laser pulse duration, power, mean power limits, and RED-i directionality were tested and confirmed equivalent to predicates. No clinical data presented.
Technological Characteristics
Infrared laser (1450-1480 nm); RED-i visible directional aiming beam; ZILOS-tk (turret-mounted) or LYKOS (integrated 40X objective); software-controlled pulse duration and multi-pulse mode; computer-generated target and isotherm visualization; image capture and reporting tools.
Indications for Use
Indicated for IVF patients with poor prognosis (advanced maternal age, prior failed IVF, cryopreserved embryos, abnormal zona pellucida morphology) or those undergoing PGD for genetic disease/aneuploidy screening.
Regulatory Classification
Identification
The assisted reproduction laser system is a device that images, targets, and controls the power and pulse duration of a laser beam used to ablate a small tangential hole in, or to thin, the zona pellucida of an embryo for assisted hatching or other assisted reproduction procedures.
Special Controls
*Classification.* Class II (special controls). The special control is FDA's guidance document entitled “Class II Special Controls Guidance Document: Assisted Reproduction Laser Systems.” See § 884.1(e) for the availability of this guidance document.
Predicate Devices
Hamilton Thorne Infrared Laser Optical system (Zilos-tk) (K063636)
Research Instruments Saturn 3 laser system (K060764)
Submission Summary (Full Text)
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APR 2 4 2012
K120055
Pg. 10f3
Innovations to Rely On
Image /page/0/Picture/3 description: The image shows the logo for Hamilton Thorne. The logo consists of a stylized key on the left and the company name "HAMILTON THORNE" in bold, sans-serif font on the right. The key is black and white, while the company name is in black.
info@hamiltonthorne.com www.hamiltonthorne.com
#### April 5 2012
#### 510(k) Summary for ZILOS-tk and LYKOS
#### A. Sponsor
Hamilton Thorne, Inc. 100 Cummings Center Suite 465E Beverly, MA 01915 Telephone: 978-921-2050 Fax: 978-921-0250
### B. Contact Name
Primary Contact: Diarmaid Douglas-Hamilton Secondary Contact : Sudha Thimmaraju
#### C. Device Name
ZILOS-tk [Zona Infrared Laser Optical System - Turn Key] LYKOS
#### D. Product Code
ZILOS-tk: Assisted Reproduction Laser System, 884.6200: Product Code MRX LYKOS: Assisted Reproduction Laser System, 884.6200: Product Code MRX
#### E. Predicate Device(s)
Hamilton Thorne Infrared Laser Optical system (Zilos-tk) (K063636) Research Instruments Saturn 3 laser system (K060764)
#### F. Indications for Use
This system is intended to be used to drill a small tangential hole in or to thin the zona pellucida of the embryo in selected in vitro fertilization (IVF) patients with otherwise poor prognosis for successful pregnancy outcome, such as advanced maternal age, prior failed IVF procedures, cryopreserved embryos, or abnormal zona pellucida morphology, and in IVF patients undergoing PGD to avoid genetic disease or aneuploidy.
Homilton Thorne, Inc., 100 Cummings Center, Suite 465E, Beverly, MA 01915-6143 USA, 978.921.2050, Fax: 978.921 0250
France Office: 21 Rue Joseph Guillonneau, 14100 Usieux, France, Telephone/Fax: (33) 2.31.63.18.95 Singapare Office: 348 Kang Ching Road, 04-17 1, Singapore, 610348, (65) 9067.4755, Fax: (65) 6265.8638
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KI 20053-
pg. 2 of 3
#### G. Device Description
There are two configurations offered. The ZILOS-tk has already been cleared [510(k) K063636], and the LYKOS is a new design version. The assembled Infrared Laser Optical System (ZILOS-tk) is the same length as a microscope 40x objective and can be fitted onto the turret of any inverted microscope. In addition a slightly different configuration is offered (Infrared Laser Optical System LYKOS system) in which the laser is integrated within a microscope 40X objective. As with Zilos-tk, it mounts on the turret of any inverted microscope and has the same intended use.
The ZILOS-tk and LYKOS are used in the reproductive laboratory for cutting a hatching hole in the zona pellucida (ZP) of embryos. The hole cut in the zona pellucida can be used to extract blastomere(s) for PGD. The devices can also be used to cut a herniated trophectoderm-cell biopsy from the embryo.
The devices use an infra-red [IR] laser beam [of wavelength in the range 1450 < A < 1480 nm] to locally heat a small spot on the embryo zona pellucida. The IR beam is projected through the microscope objective in a direction opposite to the image light, so that it focuses on the embryo. The thermal effect of the beam is to liquefy the zona pellucida in a small region surrounding the focal point, and thereby provide access to the embryo itself. The hole drilled in this manner can be used either to aid hatching or for biopsy cell extraction.
Weakening or breaking the junction between the trophectoderm cells so that they can be aspirated into the biopsy micropipette is also facilitated by using multiple pulses. Therefore a software change was made to add a multi-pulse mode which will allow for sequential multiple-pulse firing of the laser by a single footswitch press.
#### H. Substantial Equivalence
The Zilos-tk and the Lykos are substantially equivalent to the Hamilton Thorne Infrared Optical System (Zilos-tk) cleared via 510(k) K063636. These devices have the same Indication for Use and the same technological characteristics. Modifications to the Zilos-tk were detailed in this submission and evidence presented shows these devices are substantially equivalent. The modified ZILOStk and the LYKOS contain the RED-i visible directional beam for aiming the laser, which is substantially equivalent to the pilot laser for alignment checking of the Research Instruments Saturn 3 (K060764)
A comparison table is given below summarizing the features equivalent to the Predicates.
| Features compared and<br>Found Equivalent for Zilos-tk<br>and Lykos Devices | Predicate 1<br>Zilos-tk (K063636) | Predicate 2<br>Saturn 3 Laser<br>System (K060764) |
|-----------------------------------------------------------------------------|-----------------------------------|---------------------------------------------------|
| Laser Wavelength | X | |
| Laser Power | X | |
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K120053
Pg. 3 of 3
| Features compared and<br>Found Equivalent for Zilos-tk<br>and Lykos Devices | Predicate 1<br>Zilos-tk (K063636) | Predicate 2<br>Saturn 3 Laser<br>System (K060764) |
|-----------------------------------------------------------------------------|-----------------------------------|---------------------------------------------------|
| Laser Pulse Duration | X | |
| Laser Classification | X | |
| Laser Preset Pulse Durations | X | |
| RED-i beam for laser beam<br>target alignment | | X |
| Objective Magnification | X | |
| Objective Focal Length | X | |
| Computer Generated Target | X | |
| Isotherms at Laser Target | X | |
| Image Capture | X | |
| Video Image Recording | X | |
| Measurement Tools | X | |
| Report Generation | X | |
| Software Mode (Validation)<br>for Laser Beam Alignment | X | |
### I. Non Clinical Testing.
The LYKOS and ZILOS-tk image quality, laser focus, zona pellucida penetration and software have been verified and validated, and laser pulse duration, laser pulse power, laser mean power limits, RED-i directionality and laser focus have all been tested and shown to be equivalent to the predicates.
#### J Conclusions.
LYKOS and the modified ZILOS-tk are substantially equivalent to the predicate 1 ZILOS-tk:
- 1. They share the same software code.
- 2. They have the same Indications for Use and their applications are identical.
- 3. Their operational principles are the same.
- 4. The Multipulse Mode has been shown to result in similar or lower heating as the predicate single-pulse laser, to which it is therefore commensurate.
- 5. The use of the visible directional beam to indicate the target is functionally equivalent to Predicate 2, Saturn.
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## DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/3/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a stylized eagle-like symbol with three curved lines representing wings or feathers. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" is arranged in a circular fashion around the symbol.
#### Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002
APR 2 4 2012
Mr. Diarmaid H. Douglas-Hamilton Senior V.P. of R&D Hamilton Thorne Inc. 100 Cummings Center, Suite 465E BEVERLY MA 01915
Re: K120055
Trade/Device Name: ZILOS-tk [Zona Infrared Laser Optical System - Turn Key] LYKOS
Regulation Number: 21 CFR§ 884.6200 Regulation Name: Assisted reproduction laser system Regulatory Class: II Product Code: MRX Dated: March 27, 2012 Received: March 28, 2012
Dear Mr. Douglas-Hamilton:
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 (reporting of medical
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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/CDRHOffices/ucm115809.htm 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/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 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,
Benjamin K. Kirk
Benjamin R. Fisher, Ph.D. Director Division of Reproductive, Gastro-Renal, and Urological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use Statement
Indications for Use
#### 510(k) Number (if known): K120055
Device Name:
ZILOS-tk [Zona Infrared Laser Optical System - Turn Key]
#### LYKOS
Indications for Use:
This system is intended to be used to drill a small tangential hole in or to thin the zona pellucida of the embryo in selected in vitro fertilization (IVF) patients with otherwise poor prognosis for successful pregnancy outcome, such as advanced maternal age, prior failed IVF procedures, cryopreserved embryos, or abnormal zona pellucida morphology, and in IVF patients undergoing PGD to avoid genetic disease or aneuploidy.
Prescription Use X (Part 21 CFR 801 Subpart D) Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)
AND/OR
#### Concurrence of CDRH, Office of Device Evaluation (ODE)
signature
**Page** | of |
ion Sign-Off) sion of Reproductive, Gastro-Renal, and oglical De
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.