EXCALIBUR LIGHT THERAPY SYSTEM, MODEL SGIEX-04-001
K041530 · Stargate International, Inc. · NHN · Oct 14, 2004 · Physical Medicine
Device Facts
Record ID
K041530
Device Name
EXCALIBUR LIGHT THERAPY SYSTEM, MODEL SGIEX-04-001
Applicant
Stargate International, Inc.
Product Code
NHN · Physical Medicine
Decision Date
Oct 14, 2004
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.5500
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The Excalibur Light Therapy System is a non-heating lamp, infrared as described under the provisions of 21 CFR §890.5500 and is clinically indicated for: Adjunctive use in providing temporary relief of minor chronic neck and shoulder pain of musculoskeletal origin.
Device Story
Hand-held, battery-operated, non-invasive pain therapy system; utilizes two laser diodes in one applicator head. Emits visible photonic energy to human tissue; operates at 635nm wavelength; Class IIIa laser; output power ≤4.5mw per non-convergent beam. Used in clinical settings; operated by healthcare professionals. Provides adjunctive treatment for minor chronic neck and shoulder pain of musculoskeletal origin. Beams can be pulsed or continuous; treatment parameters (frequency, wavelength, time, power) align with predicate devices. Benefits include temporary pain relief.
Clinical Evidence
Bench testing only. No clinical data provided. Testing included functional performance, electrical safety, and component verification across four manufacturing stages.
Technological Characteristics
Hand-held, battery-operated unit with permanently attached applicator head. Uses Gallium Aluminum Arsenide (GaAlAs) diodes; non-convergent beam output. Wavelength: 635nm (±1%). Power output: ≤4.5mw per beam. Class IIIa laser. Complies with 21 CFR Part 1040, 47CFR Part 15B (FCC), and UL electrical standards. No software.
Indications for Use
Indicated for adjunctive use in providing temporary relief of minor chronic neck and shoulder pain of musculoskeletal origin.
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.
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# 510(k) Summary
(as required por 21CFR; §807.92)
## Excalibur Light Therapy System
OCT 1 4 2004
| 1. Applicant | Stargate International, Inc. |
|--------------|------------------------------|
| | 10235 South Progress Way #7 |
| | Parker, CO 80134 |
| | Phone: 303-840-8206 |
| | Fax: 303-840-8320 |
| II. Contact Name: | Robert H. Walker; CEO<br>rwalker@stargateinternational.com |
|-------------------|------------------------------------------------------------|
|-------------------|------------------------------------------------------------|
#### III. Device Name
| Proprietary Name | Excalibur Light Therapy System |
|-----------------------|-----------------------------------|
| Common/Usual Name (s) | Low Level Laser Therapy (LLLT) |
| | Therapeutic Light System |
| Classification Name | Infrared Lamp; (21CFR; §890.5500) |
| Product Code | NHN |
#### IV. Predicate Device/Substantial Equivalency
The Excalibur Light Therapy System is substantially equivalent to other pulsed low level therapeutic lasers and light therapy systems currently in commercial distribution. The Excalibur Light Therapy System has the same intended use and similar tochnological characteristics to predicate devices. It combines the clinically accepted therapcutic uses of previously FDA 510(k) approved light therapy systems currently in commercial distribution into onc compact and cost-effective system.
The technological equivalence to the predicate devices is substantiated by the wavelength and power output generated by the one Excalibur System applicator head permanently attached to the basic unit. The Excalibur System will provide the same treatment benefits and regimens for clinical presentations already cleared by the Food and Drug Administration for the predicate devices.
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The predicate devices the Excalibur System establishes equivalence to include the following:
| Predicate Device | 510(k) # | Manufacturer |
|------------------------------------------------|----------|------------------------|
| Tuco Erchonia PL3000 ......................... | K012580 | Tuco Innovations |
| Quantum System ......................... | K032816 | Stargate International |
#### V. Intended Use of the Device
The Excalibur Light Therapy System is a non-heating lamp, infrared as described under the provisions of 21 CFR \$890.5500 and is clinically indicated for:
- Adjunctive use in providing temporary relief of minor chronic neck and shoulder pain i of musculoskeletal origin.
As with the predicate device, pain therapy treatment can be prescribed for pain associated with with the clinical presentation specified above by having the beams pulsed or continuous with time considerations. The Excalibur Light Therapy System's variables conform to the performance specifications of the clinical parameters used by the predicate devices in frequency, wavelength, time, and power output.
#### VI. Description of the Device
The Excalibur Light Therapy System is a band-held, non-invasive, pain therapy system which utilizes non-heating lamps consisting of two laser diodes in one applicator head. It combines the clinically accepted therapeutic treatment of numerous predicate light therapy systems currently in commercial distribution and 510(k) cleared.
The system consists of a basic hand-held, battery operated control unit and a permanently attached applicator head. The laser operates at a measured wavelength of 635mm (±1%) and complies with all performance, labeling, and manufacturing standards set forth in 21CFR Part 1040. Stargate International, Inc. is a registered laser manufacturer with the Food and Drug Administration.
The laser applicator head produces an output power of ≤4.5mw2 measured, per non-convergent beam and is classified as a Class IIIa laser.
#### VII. Summary of Technical Characteristics of the Device To Referenced Predicate Devices
The Excalibur Light Therapy System and the aforementioned predicate devices use Gallium Aluminum Arsenide (GaAlAs) diodes with non-convergent beam output to emit visible photonic energy to human tissue. The technology is dependent on the laws of physics in that the variables are frequency, wavolongth, power output, and time.
The performance parameters and intended use of the Excalibur Light Therapy System are identical to all predicate devices.
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### VIII. System Testing
The testing of the Excalibur Light Therapy System includes functional performance, electrical safety, and component specification. This includes four-staged manufacturing testing and verification.
There is no software incorporated into the operation of the Excalibur Light Therapy System.
The Excalibur Light Therapy System is manufactured, performs, is labeled, and is tested to comply with the following standards:
- . FCC Standard - 47CFR Part 15B
- All Electrical Components Utilized Are UL® Approved ●
- Class IIIa Laser 21CFR Part 1040. .
#### IX. Conclusions
In accordance with testing and comparison to the predicate devices, and pursuant to 21CFR; §890.500, the Excalibur Light Therapy System has the same intended use, with similar functional and performance characteristics.
The device meets or exceeds the design, testing, and labeling standards required by law. The Excalibur Light Therapy System is manufactured and performs as intended and does not raise any new regulatory, safety, and/or clinical efficacy issues.
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DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/3/Picture/1 description: The image is a circular seal or logo. The seal contains the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the top half of the circle. In the center of the circle is a stylized emblem that resembles an eagle or bird with three wing-like shapes and a flowing tail.
Public Health Service
OCT 1 4 2004
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. Robert H. Walker Chief Executive Officer Stargate International, Inc. 10235 South Progress Way, #7 Parker, Colorado 80134
Re: K041530
Trade/Device Name: Excalibur Light Therapy System Regulation Number: 21 CFR 890-5500 Regulation Name: Lamp, non-heating for adjunctive use in pain therapy Regulatory Class: II Product Code: NHN Dated: September 3, 2004 Received: September 7, 2004
Dear Mr. Walker:
We have reviewed your Section 510(k) premarket notification of intent to market the device wt have reviewed your became in ad 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 encreated of the enactment date of the Medical Device Amendments, or to conniner by provision in accordance with the provisions of the Federal Food, Drug, de vices that have been require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The r ou may, incress, while Act include requirements for annual registration, listing of devices, good manufacturing practice, 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 rr your device to such 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); 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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Page 2 - Mr. Robert H. Walker
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 mailioning of substantial equivalence of your device to a legally premarket notification: The PDF mailing of cation 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 240) 276-0115. Also, please note the regulation entitled, Colliact the Office of Compremarket notification" (21CFR Part 807.97). You may obtain other general information on your responsibilities under the Act from the Division of Small other general information on your response Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely yours,
Miriam C. Provost
Celia M. Witten, Ph.D., M.D. Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### Indications For Use
K041530 510(k) Number (if known):
Device Name: Excalibur Light Therapy System
The Excalibur Light Therapy System is a non-heating lamp, infrared as Indications For Use: described under the provisions of 21 CFR §890.5500 and is indicated for:
> Adjunctive use in providing temporary relief of minor chronic neck and shoulder pain of musculoskeletal origin.
Prescription Use (Part 21 CFR 801 Subpart D)
AND/OR
Over-The-Counter Use_ (21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Muriam C. Provost
(Division Sign-Off) Division of General, Restorative, and Neurological Devices
**510(k) Number** K041530
Page 10 - Excalibur 510(k) dated June 4, 2004
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.