These disposable noninvasive, hypoallergenic electrodes will be used as a conductive medium between the patient and the diagnostic equipment. Depending on the application, different sizes, shapes and a choice of eigher wet gel or solid hydrogel can be used for better results. These electrodes on be used for short-term or long-term applications, up to 3 days. This product is disposable and should only be used for single use.
Device Story
Disposable, non-invasive, adhesive-backed electrodes serve as conductive interface between patient skin and diagnostic equipment. Device consists of stainless steel snap connector, polypropylene substrate, medical-grade fabric/foam/paper backing, Ag/AgCl-coated carbon-filled sensor, and conductive hydrogel or wet gel. Applied by clinicians in clinical settings for ECG, EEG, bio-feedback, or nerve sensing. Conductive gel and adhesive base provide electrical contact; stainless steel snap connects to lead wires or pinch clips. Device facilitates signal acquisition for diagnostic monitoring; disposable nature reduces cross-contamination risk; conformable materials enhance patient comfort during monitoring periods up to 3 days.
Clinical Evidence
Bench testing only. No clinical data. Effectiveness verified via AAMI standard testing: Bias Current Tolerance, DC Offset Voltage, AC Impedance, Combined Offset and Internal Noise, and Recovery Slope Time. Biocompatibility testing (Cytotoxicity, Sensitization, Primary Skin Irritation) performed per ISO 10993-1 and Tripartite Biocompatibility Guidance.
Indicated for use as a conductive medium between patients and diagnostic equipment for ECG/EKG cardiac monitoring, EEG brain wave monitoring, bio-feedback, and nerve sensing. Suitable for short-term or long-term applications up to 3 days. Single-patient use only.
Regulatory Classification
Identification
An electrocardiograph electrode is the electrical conductor which is applied to the surface of the body to transmit the electrical signal at the body surface to a processor that produces an electrocardiogram or vectorcardiogram.
Special Controls
*Classification.* Class II (special controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 870.9. The special control for this device is the FDA guidance document entitled “Class II Special Controls Guidance Document: Electrocardiograph Electrodes.” See § 870.1(e) for availability information of guidance documents.
{0}------------------------------------------------
SEP 1 5 2004
Image /page/0/Picture/1 description: The image shows the text "K041954 p.1/2". The text appears to be handwritten. The text is black and the background is white.
## Shanghai Intco Electrode Manufacturing Co. 510(k) Summary
The following information is submitted in accordance with the requirements of 21 CFR 807.92
| Submitter's name: | Shanghai Intco Electrode Manufacturing Co., LTD |
|-------------------|----------------------------------------------------|
| | No. 555 Hubin Road, Zhelin Town, FengXian District |
| | Shanghai, PR China 201417 |
| | Phone: 011 86 21 5745 1159 Ext. 849 |
| | Fax: 011 86 21 5745 1877 |
| | dsun@basicmedical.com |
| Contact person: | Don Sun, General Manager |
|----------------------|--------------------------------------|
| Date Prepared: | July 8, 2004 |
| Device Name: | Disposable EKG monitoring electrodes |
| Common/Usual Name: | Monitoring Electrodes |
| Classification Name: | Electrodes, cutaneous |
| Predicate devices: | Lead-Lok Inc. K832877. K911518/D |
Device Description: These Monitoring Electrodes are non-sterile, hypoallergenic, disposable, adhesive-backed with conductive centers, composed of materials commonly used in this application:
- First Layer: Stainless Steel snap, that works as a connection point for the diagnostic equipment.
- Second Layer: Polypropylene label substrate, used for reinforcement and a printable surface for branding.
- Third Layer: Various materials i.e., medical grade polyester fabric, polyethylene foam and paper, coated with bio-compatible adhesive.
Fourth Layer: Ag/AgCl. coated, 20% carbon filled plastic sensor.
Gel Foam Layer: Polyurethane foam. Only used for conductive wet gel.
Conductive Gel: Bio-compatible conductive solid hydrogel or wet gel
Fifth Layer: Silicone coated release liner to cover the adhesive and conductive media.
Page 8
{1}------------------------------------------------
The electrodes are disposable and designed for single-patient use. They have a low profile construction that uses soft pliable and conformable materials for patient comfort. Because of the adhesive nature no extra securing materials are required to anchor the device to the patient's skin. The electrodes have one universal contact point which is a stainless steel snap. The equipment manufacturers provide the receptacle to this in the form of cither a snap lead wire or a pinch clip.
Technological Characteristics: Our clectrodes are technologically equivalent to the predicate devices. They are physically and technically similar to those currently being marketed for ECG/EKG Cardiac monitoring, EEG brain wave monitoring, Bio-beedback and nerve sensing.
Safety and Effectiveness: Our electrodes are as safe and effective as Lead-Lok Inc. electrodes which were previously found to be substantially equivalent via 510(k) Premarket Notification K832877 and K911518/D.
The only two points of contact to the patients skin are the conductive gel and the adhesive-backed base material. Both conductive gels (wet gel and solid hydrogel), underwent the required skin sensitivity testing criteria as specified in the Triportite Biocompatibility Guidance for Medical Devices and ISO 10993-1 requirements for skin contact. These tests include Cytotoxicity, Sensitization, and Primary Skin Irritation (test results attached). As you will see, the solid hydrogel test results mention the name Vermont Medical, Lead-Lok/Shanghai Intco acquired this formula from Vernont Medical through a technology exchange. The adhesive backed materials are purchased from outside suppliers that use medical grade adhesive and also adhere to the same test criteria (test results attached)
The effectiveness of the electrodes was determined by running tests according to AAMI standards i.e., Bias Current Tolerance, DC Offset Voltage, AC Impedance, Combined Offset and Internal Noise, Recovery Slope Time and AC Impedance after Defind (test results attached).
For the above reasons, Shanghai Intco Electrode Manufacturing Co. considers its disposable electrodes to be as safe and effective as the predicate devices.
Page 9
{2}------------------------------------------------
Image /page/2/Picture/1 description: The image shows the seal of the U.S. Department of Health & Human Services. The seal features the department's name encircling a symbol. The symbol is a stylized representation of a caduceus, a staff with two snakes entwined around it, which is a symbol of medicine and healing.
Public Health Service
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
SEP 1 5 2004
Shanghai Intco Electrode Manufacturing Co. Ltd. c/o Mr. Chris Healy Lead-Lok Inc. 500 Airport Way Sandpoint, ID 83864
Re: K041954
Trade Name: Disposable ECG Monitoring Electrodes Regulation Number: 21 CFR 870.2360 Regulation Name: Electrocardiograph electrodes Regulatory Class: Class II (two) Product Code: DRX Dated: September 01, 2004 Received: September 07, 2004
Dear Mr. Healy:
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
{3}------------------------------------------------
Page 2 - Mr. Chris Healy
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. 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 (301) 594-4646. 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 may be obtained from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely vours.
Brimma for
Brad D. Zuckerman, M.D.
Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
## 510(k) NUMBER: KO41954
## DEVICE NAME: Disposable ECG/EKG (Electrocardiogram) sensing electrodes
## INDICATIONS FOR USE:
These disposable noninvasive, hypoallergenic electrodes will be used as a conductive medium between the patient and the diagnostic equipment. Depending on the application, different sizes, shapes and a choice of eigher wet gel or solid hydrogel can be used for better results. These electrodes on be used for short-term or long-term applications, up to 3 days. This product is disposable and should only be used for single use.
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use (Per 21 CFR 801.109)
OR:
Over-the Counter-Use (Optional Format 1-2-96)
Blatissima
ion Sign-Off) Division of Cardiovascular Device Page 5
510(k) Number K041954
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.