The IFM-500 is an Perinatal Fetal Monitor for measuring and recording maternal contraction and fetal heart rate. Data is displayed on a front panel 7-segment LED Display, recorded on a strip chart recorder and may be transmitted over telephone lines to a remote data receiver. Single or twin fetal heart rates may be measured by means of Pulsed Doppler Ultrasound. Uterine Activity is measured with an external TOCO transducer.
Device Story
IFM-500 is a portable perinatal fetal monitor used in clinical settings to measure fetal heart rate (FHR) and uterine contractions (UC). Device inputs include pulsed-wave Doppler ultrasound signals for FHR and strain gauge signals from an external TOCO transducer for UC. The system processes these inputs to display real-time data on a 7-segment LED panel and generates a hard-copy record via a thermal array strip chart recorder. Data can be transmitted over telephone lines to a remote receiver. The device is operated by healthcare professionals to monitor fetal well-being during labor or prenatal assessment. Output allows clinicians to observe FHR patterns and contraction frequency/intensity, facilitating clinical decision-making regarding fetal status and labor progression.
Clinical Evidence
Bench testing only. The device was tested for compliance with IEC 60601-1 (safety) and IEC 60601-1-2 (EMC). Acoustic output was verified to be within Track 1 FDA limits.
Technological Characteristics
Portable monitor with 7-segment LED display and thermal array recorder. FHR sensing via 2.0 MHz pulsed-wave Doppler (7-element circular array); UC sensing via strain gauge tocotransducer. Connectivity includes telephone line transmission. Materials: ABS AF-302 plastic (intact skin contact). Power: 100-240V AC. Safety standards: IEC 60601-1, IEC 60601-1-2.
Indications for Use
Indicated for perinatal fetal monitoring, specifically measuring and recording fetal heart rate (single or twin) and maternal uterine contractions in a clinical setting.
Regulatory Classification
Identification
A perinatal monitoring system is a device used to show graphically the relationship between maternal labor and the fetal heart rate by means of combining and coordinating uterine contraction and fetal heart monitors with appropriate displays of the well-being of the fetus during pregnancy, labor, and delivery. This generic type of device may include any of the devices subject to §§ 884.2600, 884.2640, 884.2660, 884.2675, 884.2700, and 884.2720. This generic type of device may include the following accessories: Central monitoring system and remote repeaters, signal analysis and display equipment, patient and equipment supports, and component parts.
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# SEP 2 9 2000
# 510K SUMMARY
#### 1.0 Manufacturer's Name and Address:
BiOSYS Co., Ltd. Medison Venture Tower, 997-4, Daechi-dong, Kangnam-ku, Seoul 135-280, Republic of Korea
### Corresponding Official:
Gary J. Allsebrook C/o Regulatory Management Services 16303 Panoramic Way San Leandro CA 94578-1116 Tel: (510) 276-2648 Fax: (510) 275-3559
- 2.0 Initial Distributor (if manufacturer is overseas): M. T. Kwon, CEO/President, Medison America Inc. 6616 Owens Drive, Pleasanton, CA 94588 Telephone: (510) 463-2646
#### 3.0 Date of Submission:
November 18, 1999
- 4.0 Device Name: IFM-500, Ultrasound Fetal Monitor
- 5.0 Common Name: Perinatal monitor
- 6.0 Classification: Regulatory Class:
Review Category: Device Classification Panel: II Tier II Obstetrics and Gynecology
| | FR Number | Product Code |
|----------------------------|-----------|--------------|
| Monitor, Ultrasonic, Fetal | 884.2740 | 85HGM |
- 7.0 Establishment Registration Number: Application in Process
#### 8.0 514 Performance Standards:
There are no performance standards established under Section 514 for this device. However, the IFM-500 Ultrasound Fetal Monitor system tested in accordance with
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European Standard EN / IEC 60601-1. EMC requirement was also tested in accordance with EN / IEC 60601-1-2.
#### 8.0 Special Controls:
510(k) Special Report will be supplied prior to first customer shipment.
### 9.0 Prescription Status:
Prescription Device.
- Manufacturing Location: 10.0 BiOSYS Co., LTd. 687-3, Sangoan-Ri Hongchun-Kun, Kangwon-Do, Republic of Korea
- 11.0 Sterilization Sites: None
#### 12.0 Reason for Submission:
BiOSYS proposes to introduce into interstate commercial distribution a new device referred to in this document as IFM-500 Ultrasound Fetal Monitor.
### 13.0 Identification of the TRACK being followed for the submission: Track 1
#### 14.0 Device Description and Intended Use:
The IFM-500 is an Perinatal Fetal Monitor for measuring and recording maternal contraction and fetal heart rate. Data is displayed on a front panel 7-segment LED Display, recorded on a strip chart recorder and may be transmitted over telephone lines to a remote data receiver. Single or twin fetal heart rates may be measured by means of Pulsed Doppler Ultrasound. Uterine Contraction (UC) is measured with an external TOCO transducer.
#### 15.0 Software:
BiOSYS Company Ltd. certifies that the IFM-500 Fetal Monitor is designed, developed, tested and validated according to written procedures. These procedures identify individuals within the organization responsible for developing and approving product specifications, coding and testing, validation testing and field maintenance.
#### 16.0 Hazard Analysis
Hazard analysis on this product has been performed throughout the definition, design, coding and testing phases of product development and implementation. This process has emphasized:
- Identification of potential hazards, their causes, and their effects; �
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- Development of methodologies to control the occurrence of hazards and to constrain . their effects; and
- Determine any effect on patient safety and system effectiveness. .
The potential hazards associated with this software product are no different than those I the predicate device. These are primarily related to failure of system components, or the proursed wariously obviated by decisions taken by the customers of this product. None of these failures are expected to materially contribute to patient death or injury.
It is our conclusion that there is no hardware or software component, operating in a properly configured environment, whose failure or latent design defect would be expected to result in death or injury of a patient. Thus the "Level of Concern" is "Minor".
#### Substantial Equivalence: 17.0
The following is a summary of the safety and effectiveness data on which the substantial equivalence determination is based:
| Feature | IFM-500 | Model 118<br>(K934959) |
|----------------------------------------------------|-----------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------|
| Indication for Use | - Fetal<br>(perinatal fetal monitor) | - Fetal<br>(perinatal fetal monitor)<br>- Maternal monitor |
| Modes of Operation: | - Ultrasound mode<br>- Uterine Contraction mode | - Ultrasound mode<br>- Uterine Activity mode<br>- ECG mode<br>- Blood Pressure mode<br>- Pulse Oximetry mode- |
| System Characteristics: | - Portable<br>- LED display & Control Panel<br>- Strip chart recorder | - Portable<br>- LCD display & Control Panel<br>- Strip chart recorder |
| | - AC only<br>100 -240V, 50/60 Hz,<br>0.5 - 0.25 A | - AC only<br>100/120/220/230/240 V,<br>48-62 Hz, 100 W |
| FHR/UC Monitoring | Yes | Yes |
| Maternal Heart/Pulse Rate,<br>NBP, SpO2 Monitoring | No | Yes |
| Transducer Type: | - Circular Array<br>(7 elements)<br>- Tocotransducer | - Circular Array<br>(9 elements)<br>- Tocotransducer |
| Ultrasound Frequency | 2.0 MHz | 1.151 MHz |
| FHR Detection method | Pulsed-wave Doppler | Pulsed-wave Doppler |
### Predicate Device Comparison Chart
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:
-
.
| Feature | IFM-500 | Model 118<br>(K934959) |
|-------------------------------------------------------------|----------------------------------------------|----------------------------------------------|
| FHR Range | 50 - 240 BPM | 50 - 210 BPM |
| UC Range | 00 - 99 relative units<br>00 - 99 mmHg | 0 - 100 relative units<br>0 - 100 mmHg |
| UC Detection method | Strain gauge strength | Strain gauge strength |
| Detection of fetal<br>movement via ultrasound<br>transducer | No | Yes |
| Alarm | Yes (Audible) | Yes (Audible & Visible) |
| Printer(Recorder) Type | Thermal array ( dots/mm) | Thermal array ( dots/mm) |
| Acoustic Output Display &<br>FDA Limits: | Less than Track 1 maximum<br>acoustic values | Less than Track 1 maximum<br>acoustic values |
| Product Safety Certification | - IEC 60601-1 | - IEC 601-1<br>- UL 544 |
| EMC Compliance | - IEC 60601-1-2 | |
| Patient Contact Materials | Plastic, ABS AF-302<br>(intact skin) | Plastic<br>(intact skin) |
## Accessories or Kits
.
| Feature | IFM-500 | Model 118<br>(K934959) |
|-------------|-----------------------------------------|-----------------------------------------------------------------------------|
| Accessories | - Event marker<br>- Strip chart (paper) | - Event marker<br>- Strip chart (paper)<br>- ECG electrode<br>- SpO2 sensor |
:
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Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
SEP 2 9 2000
BiOSYS Co., Ltd. c/o Mr. Gary J. Allsebrook Official Correspondent Regulatory Management Services 16303 Panoramic Way San Leandro, CA 94578-1116
Re: K994008
BiOSYS IFM-500 Intelligent Fetal Monitor Dated: June 14, 2000 Received: July 3, 2000 Regulatory Class: II 21 CFR §884.2740/Procode: 85 HGM
### Dear Mr. Allsebrook:
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 (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 to 895. A substantially equivalent determination assumes compliance 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 OS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Falluse 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 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.
This letter will allow you to begin marketing your device as desoribed in your 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predication 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 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4639. 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/dsmaldsmamain.html".
Sincerely yours,
Daniel G. Schultz, M.D.
Captain, USPHS Acting Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure (s)
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510(k) Number (if known):
Device Name: BiOSYS, IFM-500 Perinatal Fetal Monitor
Indications For Use:
The IFM-500 is an Perinatal Fetal Monitor for measuring and recording maternal contraction and fetal heart rate. Data is displayed on a front panel 7-segment LED Display, recorded on a strip chart recorder and may be transmitted over telephone lines to a remote data receiver. Single or twin fetal heart rates may be measured by means of Pulsed Doppler Ultrasound. Uterine Activity is measured with an external TOCO transducer.
## (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
# Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use (Per 21 CFR 901.109)
OR
Over-the-Counter Use
(Optional Format 1-2-96)
David A. Hyman
(Division Sign-Off) Division of Reproductive, Abdominal, ENT. and Radiological Devices 599 408 510(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.