K090198 · Wuxi Jiajian Medical Instrument Co., Ltd. · GXY · Jun 23, 2009 · Neurology
Device Facts
Record ID
K090198
Device Name
JIAJIAN SELF-ADHESIVE ELECTRODE
Applicant
Wuxi Jiajian Medical Instrument Co., Ltd.
Product Code
GXY · Neurology
Decision Date
Jun 23, 2009
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.1320
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The self-adhesive electrode is intended to be used to apply electrical stimulation current to the patient's skin. Example electrical stimulations for current applications of the electrodes are: TENS (Transcutaneous Electrical Nerve Stimulation) EMS (Electrical Muscular Stimulation)
Device Story
Jiajian Self-adhesive Electrode is a non-sterile, flexible, reusable cutaneous electrode; used to deliver electrical stimulation current (TENS/EMS) to patient skin. Device consists of three layers: nonwoven fabric tape; conductive carbon cloth; biocompatible conductive hydrogel. Available in six shapes (round, rectangle, oval, gourd, butterfly, saddle). Features lead wire assembly (min 40mm length) with 2.5mm female socket for connection to nerve/muscle stimulators. Operated by clinicians or patients in clinical or home settings. Output is electrical current distribution across skin surface; facilitates therapeutic stimulation. Benefits include non-invasive delivery of electrical therapy for nerve/muscle stimulation.
Clinical Evidence
No clinical data. Substantial equivalence is supported by bench testing, including biocompatibility testing (ISO 10993-5 cytotoxicity, ISO 10993-10 irritation/sensitization), impedance testing, adhesive testing, and electrical lead wire performance testing per 21 CFR 898 and IEC 60601-1.
Technological Characteristics
Non-sterile, flexible cutaneous electrode. Materials: nonwoven fabric tape, conductive carbon cloth, biocompatible conductive hydrogel. Lead wire assembly: 2.5mm female socket, compliant with 21 CFR 898 and IEC 60601-1. Biocompatibility per ISO 10993-5 and ISO 10993-10. Reusable, single-patient use.
Indications for Use
Indicated for patients requiring electrical stimulation therapy, specifically TENS or EMS, via cutaneous application.
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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Wuxi Jiajian Medical Instrument Co., Ltd Qinghong Rd., Ehu Town, Xishan District, Wuxi, China Phone: 0510-88745788 Fax: 0510-88746629 URL: www.jiajian-healthcare.com
K09019
ASIAN
佳健医疗
510 k .
大090198
## Section 4 . Premarket Notification [510(k)] Summary [As required by CFR 21 807.92(c)]
Date: Submitter: May 7th 20092 Wuxi Jiajian Medical Instrument Co., Ltd Qinghong Rd., Ehu Town, Xishan District, Wuxi, China 214116 Doris Dong E-mail: autumn cool@126.com Tel: 86 21 5834 2283 Fax: 86 21 5834 0486 Thomas Pang JUN 23 2009 E-mail: kapo optik@yahoo.com Tel: 1 626 350 2108 Fax: 1 626 302 3398
Contactor:
US Agent:
Device Summary:
Trade Name: Common or Usual Name: Classification Name: Product Code: Regulation Number: Medical Specialty: Device Class: Device Description:
Jiajian Self- adhesive Electrode Cutaneous electrode Electrode, cutaneous GXY 882.1320 Neurology п
Jiajian branded Self-adhesive Electrodes, wire type, are non-sterile flexible structures, composed of materials commonly used in this application:
First layer: Nonwoven fabric tape
Second layer. Electrically conductive carbon cloth (ValueTrode® Carbon, K970426)
Third layer: Biocompatible conductive hydrogel coupling media (ValueTrode GEL, K970426), which has passed the required skin sensitivity testing criteria as specified in ISO 10993-10 and cytotoxicity testing criteria as specifeid in ISO ISO 10993-5.
The electrodes are designed for single patient / multiple application use. It can be used for low-frequency or medium-frequency nerve or muscle stimulators, as the conduction film adhered to body skin.
There are six shapes of round, rectangle, oval, gourd, butterfly and saddle of the electrodes.
For the electrical connection, Jianjian provides wire type:
Lead wire assembly - at least 40mm long wire with 2.5mm diameter female socket, connected to one side of the wire.
The lead wire assembly is in compliance with the requirements of FDA performance standard 21 CFR Part 898 by testing under IEC 60601-1. subclause 56.3(c).
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JIAIAN
佳盛医門
The self-adhesive electrode is intended to be used to apply electrical stimulation current to the patient's skin.
Example electrical stimulations for current applications of the electrodes are: TENS and EMS
#### Substantial Equivalence Infomration:
#### 1) Predicate Device 1:
- 510(k) Number:
Marketing clearance date:
Product name: Manufacturer: Self-Adhesive electrodes
K080276
August 4th, 2008
Cathay healthcare equipment manufacturing. Inc
2) Comparison with predicate device
Similarities:
I ) Similar materials composition and intended use:
2) Both are non-sterile and reusable;
3) Both were established biocompatibility on standards of
ISO 10993-5-1999: Tests for cytotoxicity: In vitro methods:
ISO 10993-10: 2002: Tests for Irritation and Sensitization
4) Both electrodes distributes electrical current evenly.
Differences:
For intended use, the Self-Adhesive electrodes with K080276 is also intended to be used to record physiological signals, while Jiajian Selfadhesive Electrode is not.
3) Conclusion:
JIAJIAN MEDICAL considers Jiajian Self- adhesive Electrode to be as safe and effective as the predicate device of Self-Adhesive electrodes (K080276).
#### 1) Predicate Device 2:
| 510(k) Number: | K020735 |
|---------------------------|------------------------------------------------|
| Marketing clearance date: | July 12th, 2002 |
| Product name: | SOF-PACH™ Reusable Neurostimulation Electrodes |
| Manufacturer: | CATHAY INTERNATIONAL LTD. |
2) Comparison with predicate device
Similarities:
1) Similar materials composition and structures;
2) Similar intended use;
3) Both are non-sterile and reusable;
4) Both were established biocompatibility on standards of ISO 10993-1
5) Both are safe and effective by impedance and adhesive testing
6) Both lead wires conform to FDA 21 CFR Part 898.
#### Differences:
As to the first layer of the material of the electrode, OF-PACHTM Reusable Neurostimulation Electrodes use more kinds of materials, while Jiajian Self- adhesive Electrodes only use nonwoven fabric
#### 3) Conclusion:
JIAJIAN MEDICAL considers Jiajian Self- adhesive Electrode to be as safe and effective as the predicate device of SOF-PACH™ Reusable Neurostimulation Electrodes (K020735).
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### DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized eagle with its wings spread, and the words "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" are arranged in a circular pattern around the eagle. The eagle is black, and the text is also black. The logo is simple and recognizable.
#### Public Health Service
2 3 2009 JUN
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Wuxi Jiajian Medical Instrument Co., Ltd. c/o Doris Dong Technical Manager Oinghong Rd., Ehu Town Xishan District Wuxi, Jiangsu China 214116
Re: K090198
Trade/Device Name: Jiajian Self-Adhesive Electrode Regulation Number: 21 CFR 882.1320 Regulation Name: Cutaneous Electrode Regulatory Class: II Product Code: GXY Dated: May 7, 2009 Received: June 2, 2009
Dear Ms. Dong:
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 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 meanthat 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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If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH0ffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. 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 go to http://www.fda.gov/cdrh/mdr/ for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
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/cdrl/industry/support/index.html.
Sincerely yours.
Kesia Alexander fa
Marvina B. Eydelman, M.D. Director Division of Ophthalmic, Neurological, and Ear. Nose and Throat Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Section 3 Statement of Indications for Use
510(k) Number (if known): K090198
Device Name: Jiajian Self- adhesive Electrode
Indications for Use:
The self-adhesive electrode is intended to be used to apply electrical stimulation current to the patient's skin.
Example electrical stimulations for current applications of the electrodes are: TENS (Transcutaneous Electrical Nerve Stimulation) EMS (Electrical Muscular Stimulation)
Prescription Use V (Part 21 CFR 801 Subpart D)
AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)
Moncurrence of CDRH, Office of In Vitro Diagnostic Devices (OIVD)
Z
(Division Sign-Off) Division of Ophthalmic, Neurological and Ear, Nose and Throat Devices
510(k) Number K090198
Page I of 1 Updated December 19th, 2008
24
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.