MODIFICATION OF: PHYSIOLOGICAL SIGNAL TRANSMITTER AND RECEIVER, MODEL 3810A
Applicant
Hewlett-Packard Co.
Product Code
DRG · Cardiovascular
Decision Date
Dec 20, 1999
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 870.2910
Device Class
Class 2
Indications for Use
The Model 3810A is intended to be used upon prescription of a licensed physician or authorized healthcare provider by patients as a means to automatically collect and transmit medical information, such as weight, blood pressure and non-diagnostic ECG, over normal residential telephone lines, between a patient, typically at home, and a health care professional at the authorized provider.
Device Story
System for daily home collection/transmission of weight, blood pressure, and ECG data; includes scale, blood pressure unit, and ECG rhythm recorder. Patient-operated at home; data transmitted wirelessly to home Hub; Hub relays data via standard modem over telephone lines to secure database. Healthcare professionals access data via secure log-on; monitor trends; follow up on unexpected changes via phone. System server decodes data; provides security. No real-time alarms; clinical judgment required for interpretation. Benefits include remote monitoring for chronic cardiac conditions and post-surgical management.
Clinical Evidence
Bench testing only. Electrical safety and electromagnetic compatibility testing performed per IEC 60601-1:1988 +A1:1991 +A2:1995 and FCC Part 15.
Technological Characteristics
System includes home Hub (receiver, processor, memory, modem, auto-dialer) and peripheral units (scale, BP monitor, ECG recorder). Connectivity via standard residential telephone lines. Electrical safety per IEC 60601-1. Data transmission is automated.
Indications for Use
Indicated for home patients capable of self-administration, upon prescription, to collect/transmit weight, blood pressure (including pulse), and non-diagnostic ECG rhythm strips. Used for management of congestive heart failure, hypertension, ischemic heart disease, weight management, cardiovascular risk management, post-cardiovascular surgery, post-myocardial infarction, and other post-cardiac events. Contraindicated for uncompensated heart failure, high risk of life-threatening arrhythmias, recent myocardial infarction, or patients requiring direct medical supervision/emergency intervention.
Regulatory Classification
Identification
A radiofrequency physiological signal transmitter and receiver is a device used to condition a physiological signal so that it can be transmitted via radiofrequency from one location to another, e.g., a central monitoring station. The received signal is reconditioned by the device into its original format so that it can be displayed.
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DEC 20 1939
Image /page/0/Picture/2 description: The image contains a sequence of handwritten characters. The characters are 'K993169'. The characters appear to be written with a dark ink or marker on a white background.
# 510(k) Summary
# HP Model 3810A Hewlett Packard Company Prepared June 15, 1999
Product Name: Current Trade Name: Model 3810A Hewlett Packard Company Manufacturer: 3500 Deer Creek Road
Palo Alto, California 94043
- Generic Name: Telemedicine System
Classification Name: DXN
Submitted by: Hewlett-Packard Company,Healthcare Solutions Group, Customer Services Division , New Clinical Ventures
| Contact Person: | Sheila W. Pickering Ph.D. |
|-----------------|-----------------------------|
| | 2081 Longden Circle |
| | Los Altos, California 94024 |
| | Telephone/Fax 650 969 6114 |
### A. Legally Marketed Predicate Device
The HP device is substantially equivalent to the following predicate devices.
### Table 1 Predicate Devices
| Ref.<br># | Sponsor | Predicate Device | 510(k) Number |
|-----------|-------------------|------------------------------|---------------|
| 1 | Acme Medical | Digital Scale | K790130 |
| 2 | Instromedix | Lifesigns System | K964408 |
| 3 | American Telecare | Personal Telemedicine System | K952882 |
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### B. Device Description
The Hewlett-Packard (HP) Model 3810A telemedicine device provides a system for daily collection of weight, blood pressure and ECG used in the management of home care patients.
The main flow of information originates in the home where a patient uses a blood pressure unit, a scale and an ECG rhythm recorder on a daily schedule. Each of the units automatically reports their data wirelessly to a home Hub, which in turn relays the data using a standard modem over the telephone to a secure database. Health care professionals (such as physicians, nurses, and case managers) having approval for access use a secure log-on procedure to gain access to their patient's data. The provider follows up on any unexpected or undesired changes in the patient's data trends with a phone call.
The home Hub incorporates a receiver, an embedded processor with memory, a standard modem and an automatic dial up module. It is designed so that its operation does not interfere with normal use of the phone including an answering machine. Its connections are identical to those of an answering machine, consisting of a standard wall power plug and a daisy chain phone connection. The installation and use of the home Hub poses no significant risk to the patient or other people within the patient's home.
The data forwarded through the home Hub arrives though a standard modem contained in the HP system server. This server is separate from the Telemedicine PC in the clinic and is programmed to decode the data from the home units. The system design provides for data security.
### C. Indications for use and Intended Use
Intended Use: The Model 3810A is intended to be used upon prescription of a licensed physician or authorized healthcare provider by patients as a means to automatically collect and transmit medical information, such as weight, blood pressure and non-diagnostic ECG, over normal residential telephone lines, between a patient, typically at home, and a health care professional at the authorized provider. Indications for Use: The Model 3810A is indicated for patients at home, who are capable and willing self-administrate this device, upon prescription of their healthcare provider, to collect and transmit medical information such as weight, blood pressure (including pulse rate) and non-diagnostic ECG rhythm strip to the healthcare provider at another location. The patient takes these measurements, typically once per day, and the information is transmitted automatically via normal telephone lines to the healthcare provider. The device may be used for congestive heart failure, hypertension, ischemic heart disease, weight management, cardiovascular risk management, post cardiovascular surgery, post myocardial infarction and other post cardiac events. The device does not send any real-time alarms. Clinical judgement and experience are required to check and interpret the information delivered. Contraindications: The device is not intended as a substitute for medical care. The device is contraindicated for patients with uncompensated heart failure, patients at high risk of life threatening arrhythmias, patients with recent myocardial infarctions, or patients requiring direct medical supervision or emergency intervention.
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# D. Substantial Equivalence
The following tables show the basis for substantial equivalence
| | Predicate Devices | | Submission Device |
|-------------------|----------------------------------------|----------------------------------------|----------------------------------------|
| Product Name | Instromedix LifeSigns | American Telecare PTS | Model 3810A |
| Intended Use | Telemedicine system | Telemedicine system | Telemedicine system |
| Transmission | Residential telephone<br>lines | Residential telephone<br>lines | Residential telephone<br>lines |
| Intended<br>Users | Home users and health<br>care provider | Home users and health<br>care provider | Home users and health<br>care provider |
| Site of Use | Home; clinic | Home, clinic | Home, clinic |
| Measurements | Blood pressure, ECG | Blood pressure | Weight, blood pressure,<br>ECG |
| Software | Patient database | Patient database | Patient database |
# Substantial Equivalence Comparison Table
## E. Performance Data
The M3810A patient units- the M3813A Scale Unit, the M3815A Blood Pressure Unit, and the M3816A Rhythm Strip Recorder Unit- have been tested for electrical safety and has received a certificate of compliance with IEC 60601-1:1988 +A1:1991 +A2:1995 and FCC Part 15
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Image /page/3/Picture/1 description: The image shows the logo for the Department of Health & Human Services - USA. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the circumference. Inside the circle is a stylized symbol resembling a bird or a series of abstract shapes, possibly representing human profiles or a stylized caduceus, a symbol often associated with healthcare.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
DEC 2 0 1999
Hewlett-Packard Co. Sheila W. Pickering, Ph.D. c/o Sheila W. Pickering, Ph.D. 2081 Longden Circle Los Altos, CA 94024
K993169 Re : Modification of: Physiological Signal Transmitter and Receiver Regulatory Class: II (two) Product Code: DRG Dated: September 21, 1999 Received: September 22, 1999
Dear Dr. Pickering:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we 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). 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 (Premarket Approval), 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 A substantially equivalent determination assumes compliance to 895. with the Current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
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#### Page 2 - Sheila W. Pickering, Ph.D.
This letter will allow you to begin marketing your device as described in your 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 requlation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4648. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers 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 yours,
/ Vark Telth
Witten, Acting Director Division of Cardiovascular, Respiratory, and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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Dec-16-99 06:06A
P . 03
#### FDA Submission Cover Sheet
510(k) Number (if known): Not applicable K993169
Device Name: Hewlett Packard Model M3810A
Intended Use: The Model 3810A is intended to be used upon prescription of a licensed physician or authorized healthcare provider by patients as a means to automatically collect and transmit medical information, such as weight, blood pressure and non-diagnostic ECG, over normal residential telephone lines, between a patient, typically at home, and a health care professional at the authorized provider.
Indications for Use: The Model 3810A is indicated for patients at home, who are capable and willing selfadministrate this device, upon prescription of their healthcare provider, to collect and transmit medical information such as weight, blood pressure (including pulse rate) and non-diagnostic ECG rhythm strip to the healthcare provider at another location. The patient takes these measurements, typically once per day, and the information is transmitted automatically via normal telephone lines to the healthcare provider. The device may be used for the management of congestive heart failure, hypertension, ischemic heart disease, weight management, cardiovascular risk management, post cardiovascular surgery, post myocardial infarction and other post cardiac events. The device does not send any real-time alarms. Clinical judgement and experience are required to check and interpret the information delivered.
Contraindications: The device is not intended as a substitute for medical care. The device is contraindicated for patients with uncompensated heart failure, patients at high risk of life threatening arthythmias, patients with recent history of myocardial infarctions, or patients requiring direct medical supervision or emergency intervention.
# (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE re needed)
| IF NEEDED | |
|--------------------------------------------------------|--|
| Concurrence Of CDRH, Office Of Device Evaluation (ODE) | |
| Prescription Use | X | OR | Over-The-Counter Use |
|------------------|---|----|----------------------|
| (Per 21 CFR 801) | | | |
**
(Division Sign-Off)
Division of Cardiovascular, Respiratory, and Neurological Devices
| 510(k) Number | K973169 |
|---------------|---------|
|---------------|---------|
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.