Acute Cardiac Ischemia Time-Insensitive Instrument (ACI-TIPI ) Option is intended to be used in a hospital or clinic environment by competent health professionals . TIPI utilizes recorded ECG data along with patient demographic and chest pain status to produce a numerical score which is the predicted probability of acute cardiac ischemia. Like any computer-assisted ECG interpretation program, the Marquette ACI-TIPI evaluation and probability score is intended to supplement, not substitue for the physician's decision process. It should be used in conjunction with knowledge of the patient's history, the results of a physical examination, the ECG tracing, and other clinical findings. ACI-TIP! is intended for adult patient populations.
Device Story
ACI-TIPI is a software option for Marquette MAC-series electrocardiographs; used in hospital/clinic settings by healthcare professionals. Input data includes patient age, gender, chest pain status, and ECG features. The device processes these inputs to calculate a numerical score representing the predicted probability of acute cardiac ischemia. Output is provided to the physician to supplement clinical decision-making; it does not replace professional judgment. The device assists in the assessment of patients with chest pain, potentially aiding in the identification of unstable angina or myocardial infarction.
Clinical Evidence
Bench testing only. Quality assurance measures included requirements specification review, software testing, and field tests of the ACI-TIPI analysis. No clinical trial data provided.
Technological Characteristics
Software option for Marquette MAC-series electrocardiographs. Operates as a diagnostic, programmable computer algorithm. Utilizes patient demographics, chest pain status, and ECG signal features to compute a probability score.
Indications for Use
Indicated for adult patients presenting with chest pain in hospital or clinic settings to assist clinicians in predicting the probability of acute cardiac ischemia (unstable angina pectoris or acute myocardial infarction).
Regulatory Classification
Identification
A needle electrode is a device which is placed subcutaneously to stimulate or to record electrical signals.
Predicate Devices
Hewlett-Packard Model 1791A ACI-TIPI
Submission Summary (Full Text)
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is an abstract symbol resembling an eagle or bird in flight, composed of three stylized human profiles facing to the right.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. Antony R. H. Fender · Official FDA Correspondent Jack's Electrodes, Inc. 2227 East Crescent Drive Altadena, California 91001
JAN 28 1998
Re: K974119 Disposable Needle Electrode (ALM and DLM) Trade Name: Regulatory Class: II Product Code: GXZ Dated: September 4, 1997 Received: October 31, 1997
Dear Mr. Fender:
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 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 The general controls provisions of the Act 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 to 895. ನ್ನ substantially equivalent determination assumes compliance with the current Good Manufacturing Practice requirement, 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 In addition, FDA may publish further announcements action. 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 - Mr. Antony R. H. Fender
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) 594-4659. Additionally, for questions on the promotion and advertising of your device, please contact Also, please note the Office of Compliance at (301) 594-4639. the regulation entitled, "Misbranding by reference to
premarket notification" (21 CFR 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/dsmamain.html".
Sincerely yours,
Celia M. Witten, Ph.D., M.
Celia M. Witten, Ph.D., M.D. Director Division of General and Restorative Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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**FEB 6 1998**
f
K974199
# SECTION 2 - SUMMARY AND CERTIFICATION
## 510(k) Summary of Safety and Effectiveness
് This Summary of 810(k) 590 and 21 CFR 807.92.
| Submitter: | Marquette Medical Systems, Inc.<br>8200 W. Tower Avenue<br>Milwaukee, WI 53223<br>Telephone: (414) 355-5000<br>FAX: (414) 362-3553 |
|---------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Contact Person: | Kristin Pabst |
| Device: | Trade Name: Acute Cardiac Ischemia Time-Insensitive Predictive<br>Instrument (ACI-TIPI) Option<br>Classification Name: Computer, diagnostic, programmable<br>Detector and Alarm, Arrhythmia |
| Predicate Device: | Hewlett- Packard Model 1791A ACI-TIPI |
| Device Description: | Acute Cardiac Ischemia Time-Insensitive Predictive Instrument<br>(ACI-TIPI ) Option is a software option for Marquette MAC-series<br>electrocardiographs to aid the physician's decision-making process in<br>a chest pain setting by using patient age, gender, chest pain status<br>and ECG features to provide the predicted probability of acute cardiac<br>ischemia (which includes unstable angina pectoris and acute<br>myocardial infarction). |
| Intended Use: | Acute Cardiac Ischemia Time-Insensitive Predictive Instrument<br>(ACI-TIPI ) Option is intended to be used in a hospital or clinic<br>environment by competent health professionals utilizing recorded<br>ECG data to produce a numerical score which is the predicted<br>probability of acute cardiac ischemia. Like any computer-assisted ECG<br>interpretation program, the Marquette ACI-TIPI evaluation and<br>probability score is intended to supplement, not substitute for the<br>physician's decision process. It should be used in conjunction with<br>knowledge of the patient's history, the results of a physical<br>examination, the ECG tracing, and other clinical findings.<br><br>ACI-TIPI is intended for adult patient populations. |
| Technology: | ACI-TIPI option employs the same technology as the predicate<br>device. |
| Performance: | The following quality assurance measures were applied to the<br>development of ACI-TIPI.<br><br>Requirements specification review, software testing and field tests of<br>the ACI-TIPI analysis. |
Image /page/2/Picture/7 description: The image shows a sequence of six symbols. The first five symbols appear to be the number zero, each represented in a similar outlined style. The sixth symbol is a stylized image of a horse head, possibly representing a chess piece, rendered in solid black.
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The results of these measurements demonstrated that ACI-TIPI analysis is as safe, as effective, and performs as well as the predicate device, Hewlett-Packard Model 1791A ACI-TIPI.
. එ
1255
- - - -
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Image /page/4/Picture/10 description: The image is a black and white logo for the U.S. Department of Health and Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is an abstract symbol that resembles an eagle or a bird in flight, composed of three curved lines.
Rockville MD 20857
FEB 6 1998
Ms. Kristin Pabst Regulatory Affairs Manager Marquette Medical Systems, Inc. 8200 West Tower Avenue Milwaukee, WI 53223
Re : K974199 Acute Cardiac Ischemia Time-Intensive Predictive Instrument (ACI-TIPI) Option Requlatory Class: III (three) Product Code: 74 LOS November 7, 1997 Dated: Received: November 10, 1997 ------------------------------------------------------------------------------------------------------------------------------------------------
Dear Ms. Pabst:
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 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 (Q&) 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.
{5}------------------------------------------------
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 regulation (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" (21 CFR 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/dsmamain.html".
Sincerely yours,
Thomas J. Callehan
Thomas J. Callahan, Ph.D. Director Division of Cardiovascular, Respiratory, and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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#### 6 1998 FEB
### SECTION 11 - INTENDED USE STATEMENT
Unknown - 510(k) filed August 29, 1997 510(k) Number (if known):
Device Name: Acute Cardiac Ischemia Time-Insensitive Instrument (ACI-TIPI)
Indications For Use:
Acute Cardiac Ischemia Time-Insensitive Instrument (ACI-TIPI ) Option is intended to be used in a hospital or clinic environment by competent health professionals . TIPI utilizes recorded ECG data along with patient demographic and chest pain status to produce a numerical score which is the predicted probability of acute cardiac ischemia. Like any computer-assisted ECG interpretation program, the Marquette ACI-TIPI evaluation and probability score is intended to supplement, not substitue for the physician's decision process. It should be used in conjunction with knowledge of the patient's history, the results of a physical examination, the ECG tracing, and other clinical findings.
ACI-TIP! is intended for adult patient populations.
M. Puye
510(k) Num
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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.