WELL LIFE SELF ADHESIVE ELECTRODE / MODELS: CM, FA, PU AND SP
Applicant
Well-Life Healthcare Limited
Product Code
GXY · Neurology
Decision Date
Apr 10, 2009
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.1320
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The Well Life Self Adhesive Electrode / CM, FA, PU and SP series are intended for use as a disposable, conductive adhesive interface between the patient's skin and the Electrical Stimulator. Well Life Self Adhesive Electrode / AP, CM, FA, PU and SP series are designed and intended to be used with marketed Electrical Stimulators, i.e. TENS (Transcutaneous Electrical Nerve Stimulation), MENS (Microcurrent Electrical Nerve Stimulation), EMS (Electrical Muscular Stimulation), IF (Interferential) and PGS (Pulsed Galvanic Stimulation).
Device Story
Well Life Self Adhesive Electrodes are disposable, flexible, multi-layered cutaneous electrodes. Construction includes an exterior layer (fabric, foam, plastic film, or silicon), a conductive plastic film, and a biocompatible conductive hydrogel. Electrodes interface between patient skin and external electrical stimulators (TENS, MENS, EMS, IF, PGS). Connection options include snap connectors or lead wire assemblies with female sockets. Designed for single-patient, multiple-application use; adhesive hydrogel eliminates need for secondary securing materials. Used in clinical or home settings by patients or clinicians. Output is the delivery of electrical current from the stimulator to the patient's skin for therapeutic stimulation. Benefits include non-invasive, convenient, and reusable interface for various neurostimulation and muscle stimulation modalities.
Clinical Evidence
Bench testing only. Biocompatibility testing performed per ISO 10993-1 and Tripartite Biocompatibility Guidance. Electrical performance testing conducted per ANSI/AAMI EC12.
Technological Characteristics
Non-sterile, disposable, laminated flexible structure. Layers: exterior (fabric/foam/plastic/silicon), conductive plastic film, biocompatible conductive hydrogel. Connection: snap or lead wire. Standards: ISO 10993-1 (biocompatibility), ANSI/AAMI EC12 (electrical performance).
Indications for Use
Indicated for use as a conductive interface between patient skin and electrical stimulators (TENS, MENS, EMS, IF, PGS) for patients requiring electrical stimulation therapy. Suitable for both prescription and OTC applications.
Regulatory Classification
Identification
A cutaneous electrode is an electrode that is applied directly to a patient's skin either to record physiological signals (e.g., the electroencephalogram) or to apply electrical stimulation.
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K082065
#### 510(K) SUMMARY
## APR 1 0 2009
This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR 807.92.
The assigned 510(k) number is:
#### 1. Submitter's Identifications:
| Company Name: | Well Life Healthcare Limited |
|-----------------|---------------------------------------------------------------------------------|
| Contact person: | Jenny Hsieh |
| Address: | 1FL., No.16, Lane 454, Jungjeng Rd., Yunghe City, Taipei County, Taiwan, R.O.C. |
| TEL No.: | 886-2-2928-2112 |
| Fax No.: | 886-2-2928-1880 |
| E-mail address: | jenny@welllifehealthcare.com.tw |
Date of Summary Preparation: July 14, 2008.
- 2. Device Identification:
Classification Name: Electrode, Cutaneous
Trade/Proprietary Name: Well Life Self Adhesive Electrode / CM, FA, PU, and SP series Predicate devices: K062675 (Gemore Technology Co., Ltd)
#### 3. Device Description
Well Life Self Adhesive Electrode / CM, FA, PU, and SP series are non-sterile, disposable laminated, flexible structures composed of the following three main construction layers:
First Layer – the exterior layer which may be made of the following different type of material coated with adhesive : white fabric(CM), white foam(FA), printed plastic film(PU) or silicon pad(SP).
Second Layer - Conductive plastic film.
Third Layer – Biocompatible conductive hydrogel coupling media
The electrodes are designed for single-patient/multiple application use. Because of the adhesive nature of the biocompatible hydrogel, no securing materials are required to secure the device the patient's skin. The electrode has one type of connection point that can be used to connect the stimulation device to the electrodes. This connection point is compatible with all standard, marketed Neurostimulation and muscle-stimulation devices.
For the electrical connection, Well Life provides two different types:
- 1 > Snap Series Snap connection 1.65" standard size of mail. Snap is provided to connect to the wire female snap.
- 2> Wire Series Lead wire assembly 4.5" ~ 6" wire with .080 in. diameter female socket connected to one side of the wire.
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#### Predicate Technological Characteristics Comparison: ধ
Well Life Self Adhesive Electrode / CM, FA, PU, and SP series are technologically equivalent to the predicate devices. They are physically and technically similar to the those currently being marketed for "Neurostimulation" i.e., TENS (Transcutaneous Electrical Nerve Stimulation), MENS (Microcurrent Electrical Nerve Stimulation), EMS (Electrical Muscular Stimulation), IF (Interferential) and PGS (Pulsed Galvanic Stimulation).
Since currently the above mentioned devices (TENS & EMS) are capable of being sold as both prescription and OTC medical device, we claimed that our electrodes are capable of being sold at both prescription and OTC TENS and EMS device application so as to fit that marketing requirement.
#### 5. Safety and Effectiveness:
Well Life Self Adhesive Electrode / CM, FA, PU, and SP series are as safe and effective as the K062675 (Gemore Technology Co., Ltd) which was previously found to be substantially equivalent to the 510(K) cleared models via 510(k) Premarket Notifications.
The first safety issue consideration is whether or not the skin contact gel, which is used to adhere the electrode to the skin to transfer the electric current to the use patient, would cause any skin irritation. To ensure the conformity of this biocompatibility issue, we use the Axelgaard gel which has been proved suitable for the use in the skin contact part for the Axelgaard 510(K) cleared electrode with 510(K) number K983741 and K000947. or the other alternative biocompatibility material with ISO-10993 conformity certificate. All of them have passed the required skin sensitivity testing criteria as specified in the Tripartite Biocompatibility Guidance for Medical Devices and ISO 10993-1 requirements for skin contact.
For the electricity performance, we have conducted and completed the electrical safety testing according to the chosen performance standard, ANSI/AAMI EC12. The testing report was included in this submission.
### 6. Conclusion:
Based upon the above mention. Well Life considers its Self Adhesive electrodes to be as safe and effective as the predicate devices being marketed and manufactured by: K062675 (Gemore Technology Co., Ltd).
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#### DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/2/Picture/1 description: The image shows the seal for the Department of Health & Human Services - USA. The seal is circular and contains the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. In the center of the seal is an abstract symbol that resembles an eagle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Well-Life Healthcare Ltd. % Ms. Jenny Hsieh 1 FL, No. 16, Lane 454 Jungjeng Rd. Yunghe City, Taipei County Taiwan, R.O.C
APR 1 0 2009
#### Re: K082065
Trade/Device Name: Well-Life Self Adhesive Electrodes/CM, FA, PU, and SP models Regulation Number: 21 CFR 882.1320 Regulation Name: Cutaneous Electrode Regulatory Class: Class II Product Code: GXY Dated: January 7, 2009 Received: March 9, 2009
#### Dear Ms. Hsieh:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
Please 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); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); 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 - Ms. Jenny Hsieh
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 the reporting of adverse events under the MDR regulation (21 CFR Part 803), please contact the CDRH/Office of Surveillance and Biometrics/Division of Postmarket Surveillance at 240-276-3464. For more information regarding the reporting of adverse events, please go to http://www.fda.gov/cdrh/mdr/
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-free number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Sincerely yours,
Mark A. Millhiser
. Mark N. Melkerson 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
510(k) Number (if known):
Device Name: Well Life Self Adhesive Electrode / CM, FA, PU and SP series
Indications For Use:
The Well Life Self Adhesive Electrode / CM, FA, PU and SP series are intended for use as a disposable, conductive adhesive interface between the patient's skin and the Electrical Stimulator. Well Life Self Adhesive Electrode / AP, CM, FA, PU and SP series are designed and intended to be used with marketed Electrical Stimulators, i.e. TENS (Transcutaneous Electrical Nerve Stimulation), MENS (Microcurrent Electrical Nerve Stimulation), EMS (Electrical Muscular Stimulation), IF (Interferential) and PGS (Pulsed Galvanic Stimulation).
Prescription Use v (Part 21 CFR 801 Subpart D) Over-The-Counter Use (21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of DRH, Office of Device Evaluation (ODE)
OR
(Divis n Sign-Off) Division of Ceneral, Restorative, and Neurological Devices
0(k) Number K082063
Page 1 of
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.