The KFH Energy device is indicated for the symptomatic relief of: Chronic Intractable Pain Post-Traumatic Pain Post-Surgical Pain
Device Story
KFH Energy model E1 is a microcurrent transcutaneous electrical nerve stimulator (TENS) for pain relief. Device inputs include user-selected settings via a touch-sensitive glass front panel; it outputs monophasic, rectangular, decaying electrical waveforms (300-600 µA, 100 Hz) to the body through four adhesive skin electrodes. Designed for handheld use, the device is powered by four internal AA batteries and operates for preset durations of 30 or 60 minutes. It features status LEDs for power, low battery, output set-points, and countdown timers. The device is intended for symptomatic pain relief, helping patients manage chronic, post-traumatic, or post-surgical pain conditions.
Clinical Evidence
No clinical testing was submitted. Substantial equivalence was demonstrated through non-clinical bench testing, including enclosure materials testing, battery life, device extended use reliability, firmware functional performance, and connection testing.
Technological Characteristics
Microcurrent TENS device; ABS plastic housing with touch-sensitive opaque glass front panel; FR4-based current generator (0-33V DC, 400µA, 100Hz); monophasic rectangular waveform with decay; battery-powered (4x AA); dimensions 190x80x30mm; weight 350g; uses external adhesive electrodes.
Indications for Use
Indicated for symptomatic relief of chronic intractable pain, post-traumatic pain, and post-surgical pain in patients.
Regulatory Classification
Identification
A transcutaneous electrical nerve stimulator for pain relief is a device used to apply an electrical current to electrodes on a patient's skin to treat pain.
{0}------------------------------------------------
Image /page/0/Picture/1 description: The image shows the logo for Kung Fisher Healthcare. The logo consists of a stylized image of a kingfisher bird on the left, followed by the text "Kung Fisher Healthcare" on the right. Below the text is the phrase "Innovating for life" in a smaller font.
MAR 1 1 2008
Image /page/0/Picture/3 description: The image shows the logo for King Fisher Healthcare. The logo consists of a stylized image on the left and the text "King Fisher Healthcare" on the right. Below the logo is the text "Technology for Life" in a smaller font.
Kingfisher Healthcare NV Interleuvenlaan 62 Leuven Belgium, 3001 Phone 011 32 16397837 011 32 16397841 Fax
# "510(k) Summary" As required by 21 CFR 807.92
Owner's Name
Kingfisher Healthcare NV
Address:
Interleuvenlaan 62 Leuven 3001 Belgium +32 16 39 78 37 Telephone Number: +32 16 39 78 41 Fax Number Sally Sennitt, MD, Medical Director Contact Person
Summary Prepared
Date
December 4, 2007
#### Classification name
Transcutaneous electrical nerve stimulator for pain relief Product Code 84 GZJ 21 CFR 882.5890 Regulation
Common/Usual Name KFH Energy model E1
#### Proprietary Name
Kingfisher Healthcarc NV KFH Energy model E1
510(k) Summary Section 1
Page 2 of 6
{1}------------------------------------------------
Image /page/1/Picture/1 description: The image shows a logo for King Fisher Healthcare. The logo includes the text "King Fisher Healthcare" in a vertically stacked format. Below the text is the tagline "Truly here for life" in a smaller font. To the left of the text is a stylized graphic, possibly representing a kingfisher bird.
# Establishment Registration Number
The device will be manufactured by
Kingfisher Healthcare NV Interleuvenlaan 62 Leuven B-3001 Belgium Telephone +32 16 39 78 37 +32 16 39 78 41 Fax Establishment Registration Number: to be applied for
and
Fela Leiterplattentechnik GmbH Sturmbuehlstrasse 180 VS Schwenningen D-78056 Germany Telephone +49 7720 39 02 30 +49 7720 39 02 70 Fax Establishment Registration Number: to be applicd for
Fela Leiterplattentechnik GmbH is identified for completeness, however they are a supplier to Kingfisher Healthcare NV and not a Contract Manufacturer. Fela Leiterplattentechnik GmbH perform only certain agreed operations on instructions from Kingfisher Healthcare NV and deliver product for acceptance only to Kingfisher Healthcare NV.
#### Substantial Equivalence:
The Kingfisher Healthcare NV KFH Energy model E1 is substantially equivalent in design, use and materials to the:
Electromedical Products Intl Inc. Alpha Stim K896948, K881753, K831145, K831144 BioMedical Life Systems, Electro-nerve stimulator TENS model micro plus-A K915210 Lhasa Oms Inc, E Stim II K050435 Fuji Dynamics Ltd, Medisana Digital Tens K994265 Globalcare Intl., Inc, Globalcare Micro II and Microcare (TENS) K903394
510(k) Summary Section 1
{2}------------------------------------------------
Image /page/2/Picture/1 description: The image shows the logo for King Fisher Healthcare. The logo consists of a stylized black bird on the left and the text "King Fisher Healthcare" on the right. Below the text is the tagline "Technology for life" in a smaller font. The logo appears to be for a healthcare company that focuses on technology.
# Comparison of Technological Characteristics
The Kingfisher Healthcare NV KFH Energy model E1 is a microcurrent TENS device for pain relief with an output similar to that of the above referenced legally market products. The Kingfisher Healthcare NV KFH Energy model E1 differs from some of the above products in that it is a dedicated microcurrent device and does not have a high-current mode.
The Kingfisher Healthcare NV KFH Energy model E1 is made of the same types of material as the products referenced above. The front display of the Kingfisher Healthcare
NV KFH Energy model E1 differs from the predicates in that it is made of a "wipc-clean" glass surface eliminating any possibility for contamination to build up around indicators or controls.
# Patient Contact
Patient contact with the main device is limited to finger operation of the controls and made only with glass front panel or ABS casing (when held in the hand). Connection to the patient is made by electrodes which are already legally marketed:
| Electrodes: | Top-Rank Healthcare Equipment Co Ltd Adhesive Electrode |
|-------------|----------------------------------------------------------------|
| | K070612 |
| Gel: | Sekisui Plastic Co Ltd Technogel, included in electrodes above |
| | K070612 |
# Description of Product:
The Kingfisher Healthcare NV KFH Energy model E1 is built in an ABS casing with controls and indicator integrated into a touch-sensitive opaque glass front panel, and designed to be comfortably held in the hand.
The approximate dimensions of the unit are 190 x 80 x 30 mm and complete with batteries the unit weighs approximately 350 g (including batteries).
The device is designed to deliver electric current in the range 300 to 600 microamperes at 100 Hz frequency to the body from four "AA" sized batteries (contained internally), for a predctermined time (30 or 60 minutes), through four adhesive skin electrodes (already found substantially equivalent through the 510(k) process). The output waveform is monophasic, rectangular with decay.
{3}------------------------------------------------
Image /page/3/Picture/1 description: The image shows the logo for King Fisher Healthcare. The logo includes the company name in a simple, sans-serif font, with the words "King Fisher" stacked on top of "Healthcare". To the left of the text is a stylized graphic, possibly representing a bird or a leaf. Below the company name is the tagline "Journey for life" in a smaller, italicized font.
# Housing
The ABS plastic housing is comprised of three parts:
- . upper housing
- lower housing, and .
- battery compartment cover .
The battery compartment cover is a clip fit to the lower housing, secured with a screw, which is sealed to the upper housing with a rubber gasket and retained in position by four screws. Two clectrical connectors are located in the housing, identified as C1 (channel 1) and C2 (channel 2), for connection of the four patient contacting electrodes.
# Glass Front Panel
The front glass panel is opaque and sealed to the upper housing by a self-adhesive gasket. Electrical circuitry is integrated into the rear of the glass panel allowing the front face to act as a "touch-sensitive" user interface. Two depressions are milled into the front face of the glass front panel to assist locating the fingers over the control areas:
- a circular depression over the on/off control .
- a "ring" shaped depression over the output control area. The two sides of the . "ring" can be used to independently control the two output channels.
The elcctrical circuitry also contains the status indication light emitting diodes which can be seen through the glass panel:
- . power on
- low battery warning .
- an output set-point indicator for each channel .
- six "count-down" timer indicators ( 10, 20, 30, 40, 50 and 60 min.) .
# Controller Board
A controller board is located between the upper and lower housings. This is the FR4 based current generator rated at: 0 - 33 v d.c., 400 µA, 100 Hz.
The Kingfisher Healthcare NV KFH Energy model E1 will be packaged in a presentation cardboard case together with electrodes, leads, batteries, storage bag and the user manual.
The KFH Energy device is indicated for the symptomatic relief of:
- Chronic Intractable Pain .
- Post-Traumatic Pain .
510(k) Summary Section 1
{4}------------------------------------------------
K073008 KFH Response to Email of S. Hinckley 7 Feb 2008
Image /page/4/Picture/1 description: The image shows the logo for King Fisher Healthcare. The logo includes a stylized black shape on the left, resembling a leaf or abstract form. To the right of the shape, the text "King Fisher Healthcare" is stacked vertically. Below the shape and text, there is a tagline that reads "In biology for life" in a smaller font size.
- Post-Surgical Pain .
# Testing:
# Non-Clinical Testing
The following non-clinical testing has been included in the premarket notification to demonstrate substantial equivalence to the predicate device and meet the guidance in FDA's August 1994 "Guide for TENS 510(k) Content":
- Enclosure materials testing .
- Battery life testing .
- Device extended use reliability testing .
- Firmware functional performance .
- Device functional performance .
- Functional testing to product specification .
- . Connection testing
# Clinical Testing Submitted
No clinical testing is included.
# Summary of Testing:
From the above testing, Kingfisher Healthcare NV concludes that the KFH Energy Model E1 is substantially equivalent to the predicate products.
{5}------------------------------------------------
Image /page/5/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES. USA" arranged around the perimeter. Inside the circle is an abstract symbol resembling an eagle or bird with stylized wings and tail feathers.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Kingfisher Healthcare NV % MeddiQuest Limited Mr. Neil R. Armstrong Business & Technology Center Bessemer Drive Stevenage Hertfordshire SG1 2DX United Kingdom
MAR 1 1 2008
Re: K073008
Trade/Device Name: KFH Energy Model E1 Regulation Number: 21 CFR 882.5890 Regulation Name: Transcutaneous electrical nerve stimulator for pain relief Regulatory Class: Class II Product Code: GZJ Dated: February 28, 2008 Received: March 3, 2008
Dear Mr. Armstrong:
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.
{6}------------------------------------------------
Page 2 - Mr. Neil R. Armstrong
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 Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0120. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at (240) 276-3474. For questions regarding of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at (240) 276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at toll-free number (800) 638-2041 or (240) 276-3150 or the Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely vours,
Mark M. Millerson
Mark N. Melkerson Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{7}------------------------------------------------
# Indications for Use
510(k) Number (if known): _K073008_
Device Name: _ The Kingfisher Healthcare NV, KFH Energy model E1
Indications for Use:
The KFH Energy device is indicated for the symptomatic relief of:
- Chronic Intractable Pain
- Post-Traumatic Pain
- Post-Surgical Pain
AND/OR Over-The-Counter Use
Prescription Use × (Part 21 CFR 801 Subpart D) (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Heid R.P. John formxn
Division Sign-Off
Division of General, Restorative, and Neurological Devices
(Posted November 13, 2003) **510(k) Number**
Page *1* of *1*
Section 2
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.