K051537 · Cynosure, Inc. · ILY · Sep 26, 2005 · Physical Medicine
Device Facts
Record ID
K051537
Device Name
HILT FAMILY LASER: HILT I, HILT II, HILT III
Applicant
Cynosure, Inc.
Product Code
ILY · Physical Medicine
Decision Date
Sep 26, 2005
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.5500
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The HILT Family Laser is intended to provide topical heating for the purpose of elevating tissue temperature for the temporary relief of muscle and joint pain and stiffness, arthritis pain, or muscle spasm, the temporary increase in local blood circulation and/or promoting relaxation of muscle.
Device Story
HILT Family Laser (HILT I, II, III) is an Nd:YAG infrared lamp system emitting 1,064 nm wavelength for heat therapy. Device delivers energy via contact or non-contact handpieces connected by 600 µm fiber optic cable. Non-contact handpiece uses spacer between output window and patient skin. System operates at 230 VAC; provides up to 10 Watts power. Pulse widths range 60-150 µs; repetition rates 10-40 Hz. Used by clinicians to elevate tissue temperature, providing temporary relief of muscle/joint pain, stiffness, arthritis, or muscle spasm, and to increase local blood circulation and promote muscle relaxation.
Clinical Evidence
No clinical data; bench testing only.
Technological Characteristics
Nd:YAG laser; 1064 nm wavelength; 10W max power; 60-150 µs pulse width; 10-40 Hz repetition rate. Delivery via 600 µm fiber optic cable. Configurations: HILT I (non-contact), HILT II (non-contact), HILT III (contact and non-contact). Electrical: 230 VAC, 15A, 50-60 Hz.
Indications for Use
Indicated for patients requiring topical heating for temporary relief of muscle and joint pain, stiffness, arthritis pain, or muscle spasm; temporary increase in local blood circulation; and promotion of muscle relaxation.
Regulatory Classification
Identification
An infrared lamp is a device intended for medical purposes that emits energy at infrared frequencies (approximately 700 nanometers to 50,000 nanometers) to provide topical heating.
Special Controls
*Classification.* Class II (special controls). The device, when it is an infrared therapeutic heating lamp, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 890.9.
Predicate Devices
MLT-1000 IR Laser System
Submission Summary (Full Text)
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# SEP 2 6 2005
# 510(K) Summary
| | SEP 26 2005 | K051537<br>p. 1 of 1 |
|----------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------|
| Submitter: | 510(K) Summary<br>El En<br>Via Baldanzese, 17-50041 | |
| Contact:<br>Date Summary Prepared:<br>Device Trade Name: | Calenzano (Florence), Italy<br>Andrea Tozzi<br>Director, Quality Assurance<br>June 9, 2005<br>HILT Family Laser | |
| Common Name: | Nd:YAG laser | |
| Classification Name: | Infrared Lamp<br>21 CFR 890.5500 | |
| Equivalent Device: | MLT-1000 IR Laser System | |
| Device Description: | The HILT Family Laser provides 1,064 nm wavelength. Laser<br>emission activation is by used selectable controller. Electrical<br>requirement is 230 VAC, 15A, 50-60 Hz, single phase. | |
| Intended Use: | The HILT Family Laser is intended to provide topical heating for the<br>purpose of elevating tissue temperature for temporary relief of muscle<br>and joint pain and stiffness, arthritis pain, or muscle spasm, the<br>temporary increase in local blood circulation and/or promoting | |
| Comparison: | relaxation of muscle.<br>The HILT Family Laser has the same indications for use, the same<br>principle of operation, and similar performance specifications as the<br>predicate devices. | |
| Nonclinical Performance Data: | none | |
| Clinical Performance Data: | none | |
| Conclusion:<br>Additional Information: | The HILT Family Laser is a safe and effective device for the<br>indications specified.<br>none | |
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Name of Manufacturer: El En SpA (Italy), represented by Cynosure, Inc.
Laser Model Name and Number: HILT Family Laser: HILT I, HILT II, HILT III; Nd: YAG laser, Infrared Lamp System.
Laser Type: (Circle all that apply) Luser Type: \ < Short CO2, Copper-Vapor, Diode, Dye, Nd: YAG, Erbium, Hol: YAG, Krypton, Ruby, KTP/532, Excimer, HENE, Accessory, Other _______________________________________________________________________________________________________________________________
Indications in this application: To provide topical heating for the purpose of elevating thateauous in this upplicamporary relief of muscle & joint pain & stiffness, arthritis pain or muscle spasm; the temporary increase in local blood circulation &/or promoting relaxation of muscle.
## FDA Document Control Number: K051537/S001
FDA Product Code: 90 ILY
#### Reviewer Computer Initials: ABC
#### Date of Clearance Letter: 9/16/05
Basis of Approval: (Circle all that apply) Predicate Device (PD) Clinical Data (CD), Animal Data (AD), Specifications (SPECS), Bench Test Data (BTD), Historical Information (HI), Other __________________________________________________________________________________________________________________________
Description of Laser: The Hilt Family Laser: HILT I, HILT III is a Nd:YAG laser, Intrared Lamp system for heat therapy. The three possible treatment configurations are initalou Eamp Hilt II, non-contact; Hilt III, both contact and non-contact. The noncontact hand piece utilizes a spacer between the output window and the skin of the patient.
Operation Modes: (Circle all that apply) CW, Pulsed O-Switched, Mode Locked, Contact, Free Beam, Other ________________________________________________________________________________________________________________
CW, Pulsed, Q-Switched, Mode Locked, Contact, Free Beam, Other:***_***_
Wavelength in Nanometers: 1064 nm
Power/Energy Range (Watts): 10 Maximum
Pulse Width: Hilt I, 60-150 μs; Hilt II, 80-120 μs; Hilt III, 60-100 μs
Repetition Rate: Hilt I, 10-30 Hz; Hilt II, 10-40 Hz; Hilt III, 10-30 Hz
Delivery System: Contact and Non-contact hand pieces connected to the system via a 600 µm diameter fiber optic cable.
Comments:
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DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo features a stylized caduceus, which is a symbol often associated with medicine and healthcare. The words "DEPARTMENT OF HEALTH AND HUMAN SERVICES . USA" are arranged in a circular pattern around the caduceus.
Public Health Service
SEP 26 2005
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. George Cho Sr. Vice President Medical Technology Cynosure, Inc. 10 Elizabeth Drive Chelmsford, Massachusetts 01824
Re: K051537
Trade/Device Name: El En HILT Family Laser (HILT I, HILT II, HILT III) Regulation Number: 21 CFR 890.5500 Regulation Name: Infrared lamp Regulatory Class: II Product Code: ILY Dated: August 19, 2005 Received: August 22, 2005
Dear Mr. Cho:
We have reviewed your Section 510(k) premarket notification of intent to market the device we have teviewed your becament to (2) the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate for use stated in the encrobare) to regary the Medical Device Amendments, or to conninered province with the provisions with the provisions of the Federal Food. Drug, de vices that have been recuire approval of a premarket approval application (PMA). and Cosmetic recry that ac nevice, subject to the general controls provisions of the Act. The r ou may, dicrerero, market alle a Act include requirements for annual registration, listing of general controls provisions of the tice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it If your device is elabilitional controls. Existing major regulations affecting your device can may be subject to back acated 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 i lease oc advisou that i Dr o lessian that your device complies with other requirements of the Act that I Dri has made a and regulations administered by other Federal agencies. You must or any I outhal the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set Of N Fart 007); idocinig (2 (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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Page 2- Mr. George Cho
This letter will allow you to begin marketing your device as described in your Section 510(k) I his letter will anow you to begin manies.org your device of your device to a legally prematice notification: "The PDF intelling sification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please If you desire specific advice for your as (240) 276-0115. Also, please note the regulation entitled, Comation of Critics of Course to premarket notification" (21CFR Part 807.97). You may obtain Misoranding of reference to premaintentibilities under the Act from the Division of Small other general information on your respenses Assistance at its toll-free number (800) 638-2041 or Manufacturers, International and Soless http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely yours,
Barbara Buchholz
for
Mark N. Melkerson Acting Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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K051537 510(k) Number (if known):
### Device Name: __ El En HILT Family Laser (HILT I, HILT II, HILT III)
Indications For Use:
The HILT Family Laser is intended to provide topical heating for the purpose of elevating tissue temperature for the temporary relief of muscle and joint pain and stiffness, arthritis pain, or muscle spasm, the temporary increase in local blood circulation and/or promoting relaxation of muscle.
> Prescriptive Use X OR (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (Part 21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Barbara BonettD for MKM
Division of General, Restorative. and Neurological Devices
**510(k) Number** K051537
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.