HF54 COMBINATION ULTRASOUND INTERFERENTIAL AND PREMODULATED STIMULATION SYSTEM
K062256 · Hill Laboratories Co. · IMI · Feb 26, 2007 · Physical Medicine
Device Facts
Record ID
K062256
Device Name
HF54 COMBINATION ULTRASOUND INTERFERENTIAL AND PREMODULATED STIMULATION SYSTEM
Applicant
Hill Laboratories Co.
Product Code
IMI · Physical Medicine
Decision Date
Feb 26, 2007
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.5300
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
Interferential and Premodulated Modes: Pain relief for: Symptomatic relief of chronic intractable pain and/or management of traumatic or post surgical pain. Ultrasound Therapy: Ultrasound therapy is available from the HF54 and indicated for: Applying therapeutic deep heat within body tissues for the treatment of selected chronic and sub-chronic medical conditions such as: Relief of pain, Muscle Spasms, joint contractures. The combination ultrasound & electrotherapy modes offer deep heat for pain management (ultrasound therapy) at the same time that electrical stimulation for either pain management or muscle stimulation is being delivered. Two electrotherapy modes utilizing Premodulated IFC can be utilized at a time in conjunction with the ultrasound mode. These are using One or two ultrasound applicators. The second ultrasound applicator is optional. Infrared Therapy (using optional HF023): An Infrared Therapy Probe is available as an optional accessory (HF023) for use with the Hill Laboratories HF54 Combination Ultrasound Interferential and premodulated stimulation system or for stand-alone use with an optional external medical grade, isolated power supply. It is used to provide topical heating for: Temporary increases in local blood flow and circulation, Temporary relief of minor muscle and joint aches, Temporary relief of pain and stiffness, Relaxation of muscles, Temporary relief (or relaxation) of muscle spasms, Temporary relief of minor pain and stiffness associated with arthritis.
Device Story
HF54 is a multi-modality physical medicine device combining ultrasonic diathermy, interferential current (IFC) stimulation, and optional infrared light therapy. Device inputs include user-selected parameters for ultrasound intensity/frequency and electrical stimulation waveforms. System transforms these inputs into therapeutic deep heat (ultrasound), muscle stimulation, or pain management currents (IFC/premodulated). Infrared probe (HF023) provides topical heating. Operated by qualified therapists in clinical settings. Output is delivered via ultrasound applicators, electrodes, or light probe. Healthcare providers use outputs to manage pain, reduce muscle spasms, and improve circulation. Benefits include non-invasive management of chronic/traumatic pain and musculoskeletal conditions.
Clinical Evidence
No clinical data provided. Substantial equivalence is based on bench testing, compliance with mandatory standards (21 CFR 1050.10), and consensus standards (IEC 60601-1, 60601-1-2, 60601-2-5, 60601-2-10).
Technological Characteristics
Combination system for ultrasonic diathermy, IFC/premodulated stimulation, and infrared therapy. Complies with IEC 60601-1 (safety), IEC 60601-1-2 (EMC), IEC 60601-2-5 (ultrasound), and IEC 60601-2-10 (stimulators). Features include ultrasound applicators, electrical stimulation outputs, and optional infrared light probe. Device is intended for professional use by therapists.
Indications for Use
Indicated for patients requiring symptomatic relief of chronic intractable pain, management of traumatic or post-surgical pain, relief of muscle spasms, and joint contractures. Infrared therapy indicated for temporary relief of minor muscle/joint aches, pain, stiffness, and muscle spasms, and for increasing local blood flow/circulation.
Regulatory Classification
Identification
An ultrasonic diathermy for use in applying therapeutic deep heat for selected medical conditions is a device that applies to specific areas of the body ultrasonic energy at a frequency beyond 20 kilohertz and that is intended to generate deep heat within body tissues for the treatment of selected medical conditions such as relief of pain, muscle spasms, and joint contractures, but not for the treatment of malignancies.
{0}------------------------------------------------
K062256
FEB 26 2007
# 510(k) SUMMARY
For
### Hill Laboratories
HF54 Combination Ultrasound Interferential and Premodulated Stimulation System
#### 1. Submitter's Name and Address
| Submitter's Name: | Hill Laboratories |
|-----------------------|-------------------|
| Address: | 3 Bacton Hill Rd |
| City, State, and Zip: | Frazer, PA 19355 |
#### 2. Contact Person
| Name: | Brady Aller |
|------------|-------------------------|
| Title: | Sales/Service Manager |
| Telephone: | ( 610 ) 644-2867 |
| Facsimile: | ( 610 ) 647-6297 |
| E-mail: | bradyaller@hilllabs.com |
#### 3, Manufacturing Facility Address
| Manufacturer: | Hill Laboratories |
|-----------------------|-------------------|
| Address: | 3 Bacton Hill Rd |
| City, State, and ZIP: | Frazer, PA 19355 |
#### Establishment Registration Number 4.
Establishment 2510425 Registration Number:
#### 5. Reason for Submission
New Device
#### 6. New Device Details
| Proprietary or Trade<br>Name: | HF54 Combination Ultrasound Interferential<br>and Premodulated Stimulation System |
|-------------------------------|-----------------------------------------------------------------------------------|
| Common Name: | Ultrasonic Diathermy |
{1}------------------------------------------------
### Device Common Name, Classification, Product Code & 7. CFR No.
| Common Name | Class | ProCode | CFR |
|--------------------------------|-------|---------|----------|
| Ultrasonic Diathermy | 2 | IMI | 890.5300 |
| Interferential Current Therapy | 2 | LIH | |
| Infrared lamp | 2 | ILY | 890.5500 |
#### Classification Name 8.
diathermy, ultrasonic, for use in applying therapeutic deep heat interferential current therapy lamp, infrared, therapeutic heating
#### 9. Device Classification Panel
Physical Medicine & Neurology
#### Indications for Use 10.
#### Interferential and Premodulated Modes 10.1
Pain relief for:
Symptomatic relief of chronic intractable pain and/or management of traumatic or post surgical pain.
#### Ultrasound Therapy 10.2
Ultrasound therapy is available from the HF54 and indicated for:
Applying therapeutic deep heat within body tissues for the treatment of selected chronic and sub-chronic medical conditions such as:
- Relief of pain
Muscle Spasms
Joint contractures
The combination ultrasound & electrotherapy modes offer deep heat for pain management (ultrasound therapy) at the same time that electrical stimulation for either pain management or muscle stimulation is being delivered. Two electrotherapy modes utilizing Premodulated IFC can be utilized at a time in conjunction with the ultrasound mode. These are using one or two ultrasound applicators. The second ultrasound applicator is optional.
The intended Use/Indications For Use stated herein are consistent with the cleared indications for use for the predicate devices.
{2}------------------------------------------------
#### Infrared Therapy 10.3
An Infrared light probe is available as an optional accessory (HF023) for use with the Hill Laboratories HF54 Combination Ultrasound Interferential and premodulated stimulation system or with an optional external medical grade, isolated power supply. It is used to provide topical heating for:
- . Temporary increases in local blood flow and circulation
- . Temporary relief of minor muscle and joint aches
- . Temporary relief of pain and stiffness
- . Relaxation of muscles
- . Temporary relief (or relaxation) of muscle spasms
- Temporary relief of minor pain and stiffness associated with arthritis
#### Standards 11.
#### Mandatory Standards 11.1
21 CFR 1050.10 is applicable to therapeutic ultrasound. The HF54 Combination Ultrasound Interferential and Premodulated Stimulation System complies with this mandatory standard.
#### 11.2 Consensus Standards
The HF54 Combination Ultrasound Interferential and Premodulated Stimulation System is designed to comply with the following Consensus Standards:
| STANDARD NO. | |
|--------------|--|
|--------------|--|
| | TITLE | |
|--|-------|--|
| | | |
| IEC 60601-1 +A1, +A2 | Medical Electrical Equipment- Part 1: General Requirements<br>for Safety |
|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|
| UL 60601-1 | Medical Electrical Equipment- Part 1: General Requirements<br>for Safety |
| IEC 60601-1-2 | Medical electrical equipment - Part 1-2: General requirements<br>for safety - Collateral standard: Electromagnetic compatibility -<br>Requirements and tests |
| IEC 60601-2-5 | Medical electrical equipment - Part 2-5: Particular requirements<br>for the safety of ultrasonic physiotherapy equipment |
| IEC 60601-2-10 | Medical electrical equipment. Part 2: Particular requirements<br>for the safety of nerve and muscle stimulators |
#### 12. Predicate Devices
| 510(k) Number | Trade or Proprietary or Model<br>Name | Manufacturer | Class |
|---------------|---------------------------------------|--------------|-------|
| K031329 | Solaris Model 708 and 709 | Dynatronics | 2 |
{3}------------------------------------------------
#### Substantial Equivalence (SE) Rationale 12.1
The HF54 offers electrical stimulation, ultrasonic therapy and/or combination of the two and shares the same or similar basic characteristics including waveforms, operating frequencies and the same use in physical medicine and neurology as the predicate device. The new device and the predicate device are intended to be used by a qualified therapist.
The light wavelengths (visible and infrared) and output intensities for the HF023 Infrared therapy probe are the same as the predicate device's Infrared therapy probe cleared under K031239.
The methods of application and intended use/indications for use are the same and the same patient population is intended to be treated by the new device and the predicate device.
The ultrasound output and electrical stimulation currents are consistent with FDA guidance and international standards. The predicate device claims compliance to the same standards.
The materials used in construction of the device and the method of information display are similar. The measured parameters for the proposed HF54 are the same as those displayed on the predicate devices.
#### Conclusion 12.2
The proposed HF54 including HF023 Infrared Therapy probe is Substantially Equivalent to the Dynatronics Solaris device cleared under K031329.
{4}------------------------------------------------
Image /page/4/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services (HHS). The logo features a stylized caduceus, a symbol often associated with medicine and healthcare, with a bird-like design. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" is arranged in a circular pattern around the caduceus. The logo is simple and recognizable, representing the department's role in protecting the health of all Americans.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
- EE29 28 2837
Hill Laboratories % Mr. Brady Aller Sales/Service Manager 3 Bacton Hill Road Frazer, Pennsylvania 19355
Re: K062256
Trade/Device Name: HF54 Combination Ultrasound Interferential and Premodulate Regulation Number: 21 CFR 890.5300 Regulation Name: Ultrasonic diathermy Regulatory Class: Class II Product Code: IMI, IL Y, LIH Dated: January 8, 2007 Received: January 10, 2007
Dear Mr. Aller:
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.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject 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.
{5}------------------------------------------------
Page 2 - Mr. Brady Aller
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification 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 contact the Office of Compliance at (240) 276-0210 Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). 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-frec number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Miy Hh Osta
Mark N. Molkerson
Mark N. Melkerson J Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{6}------------------------------------------------
| 510(k) No. | |
|------------|--|
| If known | |
### Indications For Use statement – Interferential and Premodulated Modes
HF54 Combination Ultrasound Interferential and Premodulated Device Name: Stimulation System
Indications For Use:
The HF54 is indicated for:
Pain relief for:
Symptomatic relief of chronic intractable pain and/or management of traumatic or post surgical pain.
:
Continued on next page
.
.
| Prescription Use | X | AND/OR | Over-The-Counter Use | |
|--------------------------|---|----------------------------|----------------------|--|
| (Per 21 CFR 801 Subpa D) | | (Per 21 CFR 801 Subpart C) | | |
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NECESSARY)
Concurrence of CDRH, Office of Device Evaluation (ODE)
(Division Sign-Off)
Division of General, Restorative,
and Neurological Devices
| 510(k) Number | K062256 |
|---------------|---------|
|---------------|---------|
.
{7}------------------------------------------------
| 510(k) No. | |
|------------|--|
| lf known | |
## Indications For Use statement - Ultrasound Therapy
| Device Name: | HF54 Combination Ultrasound Interferential and Premodulated Stimulation System |
|------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Indications For Use: | Ultrasound therapy is available from the HF54 and indicated for: |
| | Applying therapeutic deep heat within body tissues for the treatment of selected chronic and sub-chronic medical conditions such as: |
| | Relief of pain |
| | Muscle Spasms |
| | joint contractures |
| | The combination ultrasound & electrotherapy modes offer deep heat for pain management (ultrasound therapy) at the same time that electrical stimulation for either pain management or muscle stimulation is being delivered. Two electrotherapy modes utilizing Premodulated IFC can be utilized at a time in conjunction with the ultrasound mode. These are using One or two ultrasound applicators. The second ultrasound applicator is optional. |
| Continued on next page | |
| Prescription Use<br>(Per 21 CFR 801 Subpart D) | X |
|----------------------------------------------------|---|
| AND/OR | |
| Over-The-Counter Use<br>(Per 21 CFR 801 Subpart C) | |
(PLEASE DO NOT WRITE BELOW THIS LINE – CONTINUE ON ANOTHER PAGE IF NECESSARY) Concurrence of CDRH, Office of Device Evaluation (ODE)
•
:
.
:
{8}------------------------------------------------
| 510(k) No. If known | |
|---------------------|--|
|---------------------|--|
### Indications For Use statement -Infrared Applicator
Device Name: Infrared Therapy (using optional HF023) Indications For Use: An Infrared Therapy Probe is available as an optional accessory (HF023) for use with the Hill Laboratories HF54 Combination Ultrasound Interferential and premodulated stimulation system or for stand-alone use with an optional external medical grade, isolated power supply. It is used to provide topical heating for: . Temporary increases in local blood flow and circulation . Temporary relief of minor muscle and joint aches � Temporary relief of pain and stiffness � Relaxation of muscles . Temporary relief (or relaxation) of muscle spasms . Temporary relief of minor pain and stiffness associated with arthritis Prescription Use AND/OR Over-The-Counter Use メ (Per 21 CFR 801 Subpa (Per 21 CFR 801 D) Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE – CONTINUE ON ANOTHER PAGE IF NECESSARY) Concurrence of CDRH, Office of Device Evaluation (ODE)
Predicate graph will load when search results are available.
Embedding visualization will load when search results are available.
PDF viewer will load when search results are available.
Loading panels...
Select an item from Submissions
Click any panel, subpart, regulation, product code, or device to see details here.
Section Matches
Results will appear here.
Product Code Matches
Results will appear here.
Special Control Matches
Results will appear here.
Loading collections...
Loading
My Alerts
You will receive email notifications based on the filters and frequency you set for each alert.
Sort by:
Create Alert
Search Filters
Agent Token
Create a read-only bearer token for Claude, ChatGPT, or other agents that can call HTTP APIs.
Copy this now. It will not be shown again.
Connected apps
Apps you authorized through browser sign-in. Disconnecting revokes their access immediately.
Learn the FDA Browser
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.