NaturaLase PiQo4 - NaturaLase Nd:Y AG 1064 Q-switched Laser with 532 nm accessory and Pulse Slicing Module
K151473 · Focus Medical, LLC · GEX · Sep 1, 2015 · General, Plastic Surgery
Device Facts
Record ID
K151473
Device Name
NaturaLase PiQo4 - NaturaLase Nd:Y AG 1064 Q-switched Laser with 532 nm accessory and Pulse Slicing Module
Applicant
Focus Medical, LLC
Product Code
GEX · General, Plastic Surgery
Decision Date
Sep 1, 2015
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 878.4810
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
NaturaLase PiQo4 - The NaturaLase Nd: Y AG 1064 Q-switched Laser with 532 nm accessory and Pulse Slicing Module -is indicated for use in aesthetic applications for the following at the specified wavelength: 532 nm - Removal of tattoos for Fitzpatrick skin types I-III to treat the following tattoo colors: red, yellow and orange. 1064 nm - Removal of tattoos for all skin types (Fitzpatrick I-VI) to treat tattoo colors: black, brown, green, blue and purple.
Device Story
NaturaLase PiQo4 is a Q-switched Nd:YAG laser system designed for tattoo removal. It utilizes 1064 nm and 532 nm (via KTP optics) wavelengths. A pulse slicing module diverts pulse portions to shorten duration without reducing peak power. Energy is delivered via an articulated arm with interchangeable handpieces. Operated by clinicians in aesthetic settings, the device uses high peak power to induce photomechanical and acoustic effects on pigments (selective photothermolysis). Users control settings via an LCD interface. The device provides visual feedback of parameters to assist the physician in delivering therapeutic energy, aiming to remove tattoos efficiently.
Clinical Evidence
Bench testing only. Performance testing confirmed the device meets specifications. Electrical safety and EMC testing conducted per IEC 60601-1, IEC 62366, IEC 60601-1-6, IEC 60601-2-22, and IEC 60825-1. Biocompatibility testing performed per ISO 10993. Software verification and validation testing completed.
Technological Characteristics
Nd:YAG Q-switched laser; 1064 nm and 532 nm (KTP) wavelengths. Articulated arm delivery with interchangeable handpieces. Pulse slicing electro-optics. LCD user interface. Conforms to IEC 60601-1, 62366, 60601-1-6, 60601-2-22, 60825-1; ISO 10993 biocompatibility.
Indications for Use
Indicated for tattoo removal. 532 nm wavelength for Fitzpatrick skin types I-III (red, yellow, orange ink). 1064 nm wavelength for Fitzpatrick skin types I-VI (black, brown, green, blue, purple ink).
Regulatory Classification
Identification
(1) A carbon dioxide laser for use in general surgery and in dermatology is a laser device intended to cut, destroy, or remove tissue by light energy emitted by carbon dioxide.(2) An argon laser for use in dermatology is a laser device intended to destroy or coagulate tissue by light energy emitted by argon.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
September 1, 2015
Focus Medical, LLC Michail M. Pankratov, MD, PhD MMP Medical Associates LLC 16 Appleton Street Waltham, Massachusetts 02453
Re: K151473
Trade/Device Name: NaturaLase PiQo4 - NaturaLase Nd: Y AG 1064 Q-switched Laser with 532 nm accessory and Pulse Slicing Module Regulation Number: 21 CFR 878.4810 Regulation Name: Laser surgical instrument for use in general and plastic surgery and in dermatology Regulatory Class: Class II Product Code: GEX Dated: July 8, 2015 Received: July 10, 2015
Dear Dr. Pankratov:
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
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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 (OS) 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 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" (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 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,
Joshua C. Nipper -S
Binita S. Ashar, M.D., M.B.A., F.A.C.S. For Director Division of Surgical Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration
### Indications for Use
510(k) Number (if known) K151473
Device Name
NaturaLase PiQo4 - NaturaLase Nd: Y AG1064 Q-switched Laser with 532 nm accessory and Pulse Slicing Module
Indications for Use (Describe)
NaturaLase PiQo4 - The NaturaLase Nd: Y AG 1064 O-switched Laser with 532 nm accessory and Pulse Slicing Module -is indicated for use in aesthetic applications for the following at the specified wavelength:
532 nm - Removal of tattoos for Fitzpatrick skin types I-III to treat the following tattoo colors: red, yellow and orange.
1064 nm - Removal of tattoos for all skin types (Fitzpatrick I-VI) to treat tattoo colors: black, brown, green, blue and purple.
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Type of Use (Select one or both, as applicable)
> Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(K) SUMMARY
As required by section 21 CFR 807.92
# I. General Information
| Applicant: | Focus Medical, LLC<br>2 Francis J Clarke Circle<br>Bethel, CT 06801<br>TEL: 203-730-8885<br>FAX: 203-730-8851 |
|-------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|
| Contact Person: | Michail M. Pankratov, MD, PhD<br>MMP Regulatory Consultants, LLC<br>16 Appleton Street<br>Waltham, MA 02453<br>TEL: 617-480-4543<br>clregconsult@aol.com |
| Preparation Date: | July 28, 2015 |
# II. Device Information
| Trade Name: | NaturaLase PiQo4 – NaturaLase Nd:YAG 1064 Q<br>Switched Laser with 532 KTP Optics and Pulse Slicing<br>Module |
|----------------------|---------------------------------------------------------------------------------------------------------------|
| Common/Usual Name: | NaturaLase Nd:YAG 1064 QS Laser |
| Classification: | Class II |
| Regulation Number: | 878.4810 |
| Product Code: | GEX |
| Classification Name: | Powered Laser Surgical Instrument |
| Review Panel: | General & Plastic Surgery |
| Predicate Devices: | K142372 – PicoWay Laser System, Candela Corp. |
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## III. Device Description:
The NaturaLase PiQo4 laser is a Nd:YAG 1064 Q-Switched laser with 532 KTP Optics and Pulse Slicing Module. The 532 KTP Optics is available to convert the basic 1064 nm wavelength to 532 nm and the pulse slicing electro-optics allows diverting the leading and trailing portions of the laser pulse away from the delivery system for the purpose of shortening the pulse duration without reducing the peak power.
The NaturaLase PiO04 laser offers fast and efficient treatment of tattoos and benign pigmented lesions removal through a variety of spot sizes, fluences and repetition rates. The laser energy is delivered via an articulated arm with interchangeable hand-pieces. A liquid crystal display (LCD) provides visual feedback of control settings and operating parameters. The mechanism of action for tattoo or pigmented lesion removal lies in delivering laser energy at very high peak power.
### IV. Indication for Use:
NaturaLase PiQo4 – The NaturaLase Nd: YAG 1064 Q-switched Laser with 532 KTP Optics and Pulse Slicing Module - is indicated for use in aesthetic applications at the specified wavelength:
532 mm - removal of tattoos for Fitzpatrick skin types I-III to treat the following tattoo colors: red, yellow and orange.
1064 nm - Removal of tattoos for all skin types (Fitzpatrick I-VI) to treat tattoo colors: black, brown, green, blue and purple
#### V. Technological Characteristics:
The NaturaLase PiO04 laser has the same intended use and similar indications for use, technological characteristics and operating principles as the Candela PicoWay Laser System (K142372). The NaturaLase PiQo4 laser design and components are very similar to those of the predicate devices. They all have treatment handpieces connected to the articulated arm that is connected to the main console where the user interface is located. They all allow the spot size to be adjusted with the handpiece depending on the application. They all provide an aiming beam to assist in delivery of the therapeutic energy. Differences between the NaturaLase PiQ04 laser and predicate device in specific maximum energy levels and fluence delivered do not raise any new safety or effectiveness issues because the NaturaLase PiQo4 laser parameters fall within the range of parameters delivered by the predicate device.
### VI. Testing Performance
All performance testing demonstrated that the NaturaLase PiQo4 laser performs according to specifications and functions as intended.
Electrical safety and electromagnetic compatibility (EMC) testing for the NaturaLase PiQ04 laser system was conducted by an independent laboratory in accordance with IEC 60601-1, Medical electrical equipment, part 1: general requirements for basic safety and essential performance. The NaturaLase PiQo4 laser was determined to be in conformance with applicable IEC standards (IEC 62366, 60601-1, 60601-1-6, 60601-2-22, and IEC 60825-1). The
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biocompatibility of the NaruraLase PiQo4 laser is consistent with the ISO 10993. Software verification and validation testing results are acceptable for software release.
### VII. Summary of Substantial Equivalence
| | NaturaLase PiQo4 Laser (Focus<br>Medical) | | PicoWay<br>(Candela, Corp) | |
|-----------------|-------------------------------------------|-----------------------|----------------------------|-----------------------|
| Wavelength | 1064 nm | 532 nm | 1064 nm | 532 nm |
| Pulse Duration | 500 ps | 500 ps | 450 ps | 400 ps |
| Pulse Energy | 400 mJ | 200 mJ | 400 mJ | 200 mJ |
| Pulse Fluence | 1.4 J/cm2 @ 6 mm spot | 1.4 J/cm2 @ 4 mm spot | 1.4 J/cm2 @ 6 mm spot | 1.4 J/cm2 @ 4 mm spot |
| Peak Power | 800 MW | 400 MW | 889 MW | 500 MW |
| Peak Irradiance | 2.8GW/cm2 @ 6 mm spot | 2.8GW/cm2 @ 4 mm spot | 3.1GW/cm2 @ 6 mm spot | 3.5GW/cm2 @ 4 mm spot |
Review of the technological characteristics for the primary predicate device and the PiQo4 Laser shows close similarity in parameters principally responsible for generating tissue effects.
The NaturaLase PiQo4 laser has the same intended use as the predicate device with similar indications for use. It presents similar technological characteristics as the predicate device including the laser type, wavelengths, device design, pulse width, frequency, spot sizes and system components. Although there are some differences between the NaturaLase PiQ04 laser and its predicate device in terms of maximum pulse energy, fluence, pulse duration, etc. these differences do not present any new concerns of safety and effectiveness since the NaturaLase PiQo4 laser parameters are within the range used by the predicate devices for treatment of pigmented lesions and tattoo removal. The NaturaLase PiQo4 laser and its predicate device operate with the same mechanism of action based on selective photothermolysis and based on photothermal and significant photomechanical or acoustic effects of pigments in tattoos. Therefore, the NaturaLase PiQo4 laser has the same intended use and similar indications for use, technological characteristics, and principles of operation as predicate device. The NaturaLase PiQo4 laser 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.
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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.
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.
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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.
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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.