K024005 · Welch Allyn, Inc. · DXN · Feb 12, 2003 · Cardiovascular
Device Facts
Record ID
K024005
Device Name
WELCH ALLYN VITAL SIGN MONITOR WITH MP506
Applicant
Welch Allyn, Inc.
Product Code
DXN · Cardiovascular
Decision Date
Feb 12, 2003
Decision
SESE
Submission Type
Special
Regulation
21 CFR 870.1130
Device Class
Class 2
Attributes
Pediatric
Indications for Use
The Welch Allyn Vital Signs Monitor is intended for monitoring of blood pressure, pulse rate, temperature and oxygen saturation (SpO2) of adult and pediatric patients. The device is not designed, sold or intended for use except as indicated. The Welch Allyn Vital Signs Monitor is not designed for use with neonates. To ensure pediatric blood pressure accuracy and safety, note that the Welch Allyn Small Child cuffs are the smallest cuffs approved for use with young children and infants. The circumference of the child's arm must fit within the range markings on the cuff. The Welch Allyn Vital Signs Monitor should not be used on patients who are linked to heart/lung machines.
Device Story
Welch Allyn Vital Signs Monitor measures non-invasive blood pressure, pulse rate, temperature, and SpO2. Inputs include blood pressure cuff pressure, temperature probe data, and red/infrared light absorption via SpO2 sensor (finger, toe, ear, or forehead). Device uses microprocessor to interpret light signals for SpO2 calculation. Outputs displayed on screen or printed via integrated thermal printer. Used in hospitals, clinics, ambulatory centers, and nursing homes by healthcare practitioners. Features programmable alarms and automatic blood pressure cycles. Benefits include flexible, simultaneous multi-parameter monitoring for patient assessment in clinical and transport settings.
Clinical Evidence
No clinical data. Equivalence supported by bench testing, including software system-level functional tests, IEC60601-1-2 electromagnetic compatibility testing, Nellcor-standard compliance testing for the MP506 module, and accuracy/usage validation protocols.
Indicated for monitoring blood pressure, pulse rate, temperature, and SpO2 in adult and pediatric patients. Contraindicated for neonates and patients connected to heart/lung machines.
Regulatory Classification
Identification
A noninvasive blood pressure measurement system is a device that provides a signal from which systolic, diastolic, mean, or any combination of the three pressures can be derived through the use of tranducers placed on the surface of the body.
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# FEB 1 2 2003
# KO2400
# Section 1 - Revised 510(k) Summary
[As described in CFR 807.92]
## Submitter's Name & Address David Klementowski 4341 State Street Road Skaneateles Falls, NY 13153 Phone: (315) 685-4100 ext. 4133 Fax: (315) 685-7889
B. Other Contact Persons
Chuck Setzer Quality Assurance and Regulatory Affairs Manager (Arden Facility), 95 Old Shoals Road Arden, NC 28704 Phone: (828) 684-4895 ext. 5262 Fax: (828) 687-1002
Brett Pierce Project Manager 95 Old Shoals Road Arden, NC 28704 Phone: (828) 684-4895 ext. 5248 Fax: (828) 687-1002
C. Device Name
Proprietary Name: Welch Allyn Vital Signs Monitor Common Name: Vital Signs Measurement Device Classification Name: Noninvasive Blood Pressure Measurement System
D. Device Classification Class II (CFR21 870.1130 Noninvasive Blood Pressure Measurement System).
E. Predicate Device Welch Allyn Vital Signs Monitor Welch Allyn, Inc. 510(K) Document Control Number K951193
F. Description of the Device
The Welch Allyn Vital Signs Monitor is designed to non-invasively and automaticallymeasure systolic and diastolic blood pressure, pulse rate, temperature and oxygen saturation (SpO2) for adult and pediatric patients. THE
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WELCH ALLYN VITAL SIGNS MONITOR IS NOT INTENDED TO BE USED ON NEONATAL PATIENTS. All blood pressure, pulse, temperature and SpO2 values are displayed on large, easy-to-read displays, and may be printed via an integrated thermal printer, as desired.
The rechargeable battery and wide variety of mounting accessories make the Welch Allyn Vital Signs Monitor convenient for many locations. The operator may choose any combination of simultaneous measurement modalities. This flexibility, combined with features such as programmable alarms and automatic blood pressure cycles, makes the Welch Allyn Vital Signs Monitor ideal for a wide variety of patient monitoring needs.
The Welch Allyn Vital Signs Monitor is intended for use in a wide variety of health care settings. This includes hospital departments, as well as patient transport within the hospital environment. The Welch Allyn Vital Signs Monitor is also intended for use in alternate care settings, such as physician offices, freestanding ambulatory care and surgery centers, health clinics and nursing homes. The Welch Allyn Vital Signs Monitor may also be used during patient transport within any of these alternate care environments.
The Welch Allyn Vital Signs Monitor is not intended for the monitoring of patients during transport external to the health care environment (eg. ambulance, helicopter transport). The Welch Allyn Vital Signs Monitor is not intended for use in environments, which are not supervised by a health care practitioner.
#### H. Intended Use
The Welch Allyn Vital Signs Monitor is intended for monitoring of blood pressure, pulse rate, temperature and oxygen saturation (SpO2) of adult and pediatric patients. The device is not designed, sold or intended for use except as indicated.
The Welch Allyn Spot Check Device is not designed for use with neonates. To ensure pediatric blood pressure accuracy and safety, note that the Welch Allyn Small Child cuffs are the smallest cuffs approved for use with young children and infants. The circumference of the child's arm must fit within the range markings on the cuff.
#### The Welch Allyn Spot Check Device should not be used on patients who are linked to heart/lung machines.
#### I. Technological Similarities and Differences
The Welch Allyn Vital Signs Monitor and the Welch Allyn Vital Signs Monitor with MP506 Pulse Oximeter OEM Module are essentially the same device. Welch Allyn has added the new SpO2 module from Nellcor (The MP506 (same as in the N-595 Pulse Oximeter mad ey Nellcor)) to the Vital Signs Monitor. This is an upgraded SpO2 module that was cleared by the FDA 510(k) K012891. The Vital
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Signs Monitor was cleared by the FDA 510(k) K002530.
In regards to the change in the SpO2 module for to the Vital Signs Monitor, the basic fundamental technology is the same. A sensor is placed on the finger, toe, ear lobe. or forehead and a microprocessor interprets the amount of red and infrared light that is passing through the tissue and calculates Specific Oxygen (SpO2) of the blood.
## J. Testing for Equivalence
Equivalence to the legally market predicate device was determine through the means of verification and validation testing. The following testing was conducted on the VSM with MP506:
Verification: 3 test were conducted on the VSM 506
- 1) Software system level functional tests
- 2) Pre-scan IEC60601-1-2 testing at a third party test house
- 3) Nellcor compliance testing (whereby Nellcor tested our VSM with their MP506 to their standards).
The full protocols were tested on the VSM with MP506 and these tested were used to show that Welch Allyn implemented correctly the new MP506 SpO2 module.
Validation: 4 test were conducted on the VSM with MP506
- 1) Software system level functional tests
- 2) Accuracy test
- 3) Usage test
- 4) Basic functional tests
The full protocols were tested on the VSM with MP506 and these tests were used to show that the Welch Allyn VSM meet the customer requirements.
## K. 510(k) Summary Conclusions
Based on the following, it is our conclusion that the new Welch Allyn Vital Signs Monitor with MP506 Pulse Oximeter OEM module is substantially equivalent to the Welch Allyn Vital Signs Monitor.
- The features and intended use has not changed ●
- The Vital Signs Monitor with MP506 Pulse Oximeter OEM module has . passed all the safety and effectiveness testing.
- The fundamental technology of the Welch Allyn Vital Signs Monitor with MP506 Pulse Oximeter OEM module has not changed from that of the Welch Allyn Vital Signs Monitor cleared under K951193.
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Image /page/3/Picture/1 description: The image is a black and white logo for the U.S. Department of Health & Human Services. The logo features a stylized image of three human profiles facing right, with flowing lines suggesting hair or movement. The profiles are stacked on top of each other, creating a sense of unity. Encircling the image is the text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" in a circular arrangement.
FEB 1 2 2003
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. David Klementowski Corporate Regulatory Affairs Manager Welch Allyn, Incorporated 4341 State Street Road Skaneatels Falls, New York 13153
Re: K024005
Trade/Device Name: Welch Allyn Vital Signs Monitor Regulation Number: 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQN, DQA Dated: January 29, 2003 Received: January 30, 2003
Dear Mr. Klementowski:
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.
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Page 2 - Mr. Klementowski
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.
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 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 yours,
Susan Runner
Susan Runner, DDS, MA Interim Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
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# Indications for Use Statement.
| 510(k) Number: | Unknown |
|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Device Name: | Welch Allyn Vital Signs Monitor |
| Indications for use: | The Welch Allyn Vital Signs Monitor is intended for<br>monitoring of blood pressure, pulse rate, temperature and<br>oxygen saturation (SpO2) of adult and pediatric patients.<br>The device is not designed, sold or intended for use except<br>as indicated.<br>* The Welch Allyn Vital Signs Monitor is not designed for<br>use with neonates. To ensure pediatric blood pressure<br>accuracy and safety, note that the Welch Allyn Small Child<br>cuffs are the smallest cuffs approved for use with young<br>children and infants. The circumference of the child's arm<br>must fit within the range markings on the cuff.<br>* The Welch Allyn Vital Signs Monitor should not be used<br>on patients who are linked to heart/lung machines. |
(Please Do Not Write Below This Line - Continue On Another Page If Needed)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use_
Or Over-The-Counter Use
(Per 21 CFR 801.109)

y, General Hospital,
510(k) Number:
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.