The VacuLink is intended for obstetric use in the measurement and recording of data related to vacuum-assisted delivery (such as vacuum, number and duration of pulls and number of pop-offs) on the strip chart.
Device Story
VacuLink is a single-use, battery-powered vacuum measuring accessory for fetal vacuum extractors. It connects to the vacuum chamber of handheld extractors (e.g., Mityvac, Kiwi) and interfaces with maternal/fetal monitors via electrical cable. It measures vacuum pressure applied to the fetal head, displaying values in cm Hg. The device features a light sequence (red, yellow, green) for self-testing and status indication. It transmits data to the maternal/fetal monitor for display on a video monitor and permanent storage in the hospital database. Used in clinical obstetric settings by healthcare providers, it provides real-time and recorded vacuum data, including maximum vacuum, duration, and pull counts. This information assists clinicians in monitoring delivery progress and potentially improves safety by providing redundant, accurate pressure measurements compared to standard mechanical gauges.
Clinical Evidence
Performance testing included initial bench testing against certified reference gauges, a feasibility clinical study, and secondary bench testing on the final configuration. Results indicated VacuLink is as accurate as the claimed accuracy of comparable vacuum gauges and more accurate by a factor of 10 in clinical settings. Electrical safety, EMC testing, and software validation were also performed.
Technological Characteristics
Battery-powered, single-use electronic vacuum measuring device. Interfaces with maternal/fetal monitors via electrical cable. Features LED status indicators (red, yellow, green). Measures vacuum in cm Hg. Provides digital output to hospital databases and strip charts. Software-based data processing and display.
Indications for Use
Indicated for obstetric use during vacuum-assisted delivery to measure and record vacuum pressure, pull duration, pull count, and pop-offs for patients undergoing assisted delivery.
Regulatory Classification
Identification
A fetal vacuum extractor is a device used to facilitate delivery. The device enables traction to be applied to the fetal head (in the birth canal) by means of a suction cup attached to the scalp and is powered by an external vacuum source. This generic type of device may include the cup, hosing, vacuum source, and vacuum control.
Predicate Devices
Kiwi brand fetal vacuum extractor systems (1981260)
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Image /page/0/Picture/0 description: The image shows the logo for MEDEVCO, which is a medical device company. The logo features a stylized "m" followed by the company name in block letters. Above the company name, the date "APR 1 4 2005" is printed.
Appendix C Page 1 of 3
# 510(k) Summary
## Submitter Information:
Medevco, Inc. 12201 Merit Drive, Suite 330 Dallas, TX 75251
## Contact:
Ginger Bowman, Director of Marketing Phone: 972.788.4372 Fax: 972.851.0077
## Date Prepared:
March 10, 2005
## Product Name:
This is an accessory to a fetal vacuum extractor, which is a Class II device per 884.4340. Panel: Obstetrics/Gynecology Product Code: HDB
#### Predicate Device:
This device is substantially equivalent to the vacuum indicator features of Kiwi brand fetal vacuum extractor systems marketed by Clinical Innovations, Inc., under 1981260, and Mityvac brand vacuum extractor systems marketed by Prism Enterprises (now CooperSurgical) under K011532.
#### Description:
The VacuLink is a small, battery powered single-use vacuum measuring device. It is The VacuLink is a chianing to the vacuum chamber of commercial handheld vacuum connected in praste tasmig on Mityvac & Kiwi PalmPump). As a redundant gauge to assisted delivery bytters gauges on those devices, it electronically measures the the Dourlow applied to the fetal head during a vacuum assisted delivery. It connects to the vacuunt uppired to the ci.e. HP, Corometrics and Spacelabs) via electrical cable. The maternal is numerically displayed in centimeters of mercury (cm Hg). The vacuum vatually is nambroum the uterine activity channel of the maternal/fetal monitor and it
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is permanently stored in the hospital database. The information may also be displayed on a video monitor as well.
The VacuLink incorporates a light sequence of red, yellow, and green. When the I he VacuLink incorporates a ingav three lights will flash in sequence as a quick test vacurant is internal components. At the successful completion of the test, the green LED of the meethal components: - is disconnected from the maternal/fetal monitor. A munimates until the Vaculine is assets voltage is low and the VacuLink should be nashing you've LED mithoutes are oused previously and is reconnected, the red LED illuminates indicating the VacuLink is no longer operational.
#### Intended Use:
The VacuLink is intended for obstetric use in the measurement and recording of data The Vacuum-assisted delivery (such as vacuum, number and duration of pulls and number of pop-offs) on the strip chart.
| SUBSTANTIAL EQUIVALENCE COMPARISON | | | |
|--------------------------------------|---------------------|--------------------------|---------------------|
| | VacuLink | Kiwi | Mityvac |
| Digital display | YES | NO | NO |
| Permanent record | YES | NO | NO |
| Disposable | YES | YES | NO |
| Gauge visible to physician | YES | YES | NO |
| Ability to display maximum vacuum | YES | YES | YES |
| Units of vacuum measurement | cm Hg | cm Hg, mm Hg, kPa, in Hg | cm Hg, in Hg |
| Claimed accuracy/tolerance | at 70 cm Hg = 3.26% | Not published | at 70 cm Hg = 3.27% |
| Visible display at variable angles | YES | YES | YES |
| Calibration required by the hospital | NO | NO | YES |
| Multi-use gauge | NO | NO | YES |
#### Comparison to Predicate Device:
The VacuLink contains additional features including:
- Vacuum data recorded on paper strip chart .
- I Visible display on CRT
- v isibio display on Orimum vacuum, time at maximum vacuum, total time of ■ vacuum, involuntary releases, reduction of vacuum between contractions, and total number of pulls
- Light sequencing system to confirm functionality of VacuLink l
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Appendix C Page 3 of 3 K043614
## Performance Data & Conclusions:
Performance testing of VacuLink has been conducted in three main phases:
- 1. Initial bench testing to compare VacuLink technology to certified reference Intial belien testing to comparate in use at community hospitals.
- 2. Initial clinical phase (feasibility study)
- 2. Intrail Chinedi phase (reastonity could))
3. Secondary bench testing on the current configuration of the VacuLink device
Performance testing of VacuLink as well as the reusable handheld vacuum devices Ferrormance testing of VacuLink as accurate as the claimed accuracy of the comparable reveals that the Vacurimis is as accurate as the lack of calibration of the comparable vacuum gauges. In actual cinnical VacuLink was more accurate by a factor of 10.
Electrical safety and EMC testing was also performed to demonstrate conformance Diectived salery and ENTO testing was aftware validation and sterilization process information have also been provided.
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Image /page/3/Picture/2 description: The image is a black and white logo for the Department of Health & Human Services - USA. The logo is circular in shape, with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES-USA" arranged around the perimeter of the circle. Inside the circle is an abstract image of an eagle, with its wings spread and its head facing to the left. The eagle is composed of three thick, curved lines that suggest the shape of the bird.
APR 1 4 2005
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Medevco, Inc. % Ms. Krista Oakes Principal Amica Solutions 2300 McDermott Rd., #200-207 PLANO TX 75025
Re: K043614
Trade/Device Name: Vaculink Regulation Number: 21 CFR 884.4340 Regulation Name: Fetal vacuum extractor Regulation Number: 21 CFR 884.2740 Regulation Name: Perinatal monitoring system and accessories Regulatory Class: II Product Code: HDB and HGM Dated: March 10, 2005 Received: March 11, 2005
Dear Ms. Oakes:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced we nave icvicwed your becared by equivalent (for the indications for use stated in above and nave determined the devices marketed in interstate commerce prior to the enclosure) to regally mankeled productions of to device Amendments, or to devices that have been lvay 26, 1970, the clacultions and of the Federal Food, Drug, and Cosmetic Act (Act) that Iteliassified in accordanted with the proval application (PMA). You may, therefore, market the do not require approval of a premainer approvins of the Act. The general controls provisions of the Act device, subject to the general conacis prove, 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 II your device is classified (see above) into caller than existing major regulations affecting your Approval), It may be subject to such ademons. Title 21, Parts 800 to 898. In addition, FDA device can be nound in the Gour of concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that Flease be advised mar 1 27 's 158anies of aevice complies with other requirements of the Act or any FDA hade a decemination administered by other Federal agencies. You must comply with all the Federal statues and regulations administration and listing (21 CFR Part 807); labeling Act S requirements, moduling, but not mixed in the requirements as set forth in the quality systems (QS) (21 CFR Part 801); good namalacting practice the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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This letter will allow you to begin marketing your device as described in your Section 510(k)
This and the first of the of a line of select of your device to a legall This letter will allow you to begin marketing your antial equivalence of your device to a legally
premarket notification. The FDA finding of substantial equivales and thus, premarket notification. The FDA iniding of saostantial of 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), pleased If you desire specific advice for your device on our laboring regarms.
contact the Office of Compliance at one of the following numbers, based on the regulation number at the top of this letter:
| 21 CFR 876.xxxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|-----------------|----------------------------------|--------------|
| 21 CFR 884.xxxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 892.xxxx | (Radiology) | 240-276-0120 |
| Other | | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to prematet notification" (21 CFR Also, please note the regulation entitled, "visorudion on your responsibilities under the Act from the 807.97). You may obtain other gelleral information on your respections.
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
056-2011 or (3.gov/cdrh/industry/support/index.html.
Sincerely yours,
Nancy C. Hodgdon
Nancy C. Brogdon Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## Indications for Use
510(k) #: K043614
Device Name: VacuLink
Indications for Use:
The VacuLink is intended for obstetric use in the measurement and recording of data related
of any and the county of any and sumber and duration of pulls and number of The Vacul.ink is intended for obsective use in the measurement.
to vacuum-assisted delivery (such as vacuum, number and duration of pulls and number of pop-offs) on the strip chart.
Prescription Use X (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 IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
David G. Ingram
(Division Sign-Off) Division of Reproductive, Abdominal. and Radiological Devices 510(k) Number.
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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.
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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.
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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.