The Polygram 98 pH Testing System is intended to record, store, view and analyze esophageal and gastric refluxate data to diagnose reflux disorders. The Polygram 98 pH Testing System can also be used to locate the position of the proximal Lower Esophageal Sphincter (LES) manometrically, to assist in the accurate placement of the pH catheter.
Device Story
Ambulatory system for gastrointestinal reflux disorder evaluation; measures bile and pH online via patient-worn sensors. Data captured/recorded by Bilitec 2000; uploaded to Polygram 98 pH Testing Application software for display, analysis, and reporting. Used in clinical settings by trained technicians/physicians. Workflow: equipment preparation/calibration; patient data entry; procedure execution; data review/analysis; report generation. Provides quantitative reflux parameters (e.g., number/duration of refluxes, symptom index, symptom association probability). Assists clinicians in diagnosing reflux disorders and positioning pH catheters via manometric LES localization. Benefits patients through objective, longitudinal reflux monitoring.
Clinical Evidence
No clinical data. Bench testing only; verification results demonstrate the enhanced system performs as the predicate system.
Technological Characteristics
Ambulatory system; Bilitec 2000 hardware; optical fiber probe; 1 Hz sampling rate with 4, 8, or 16s averaging; 128 Kbytes flash memory; serial communication (9600 baud); 4x 1.5V AA alkaline batteries; spectrophotometric bile measurement (0-1 absorbance range); pH measurement; LCD display (4 rows, 16 characters); conforms to EN 60601-1.
Indications for Use
Indicated for pediatric to adult patients requiring diagnosis of gastrointestinal reflux disorders via recording and analysis of esophageal and gastric refluxate data, and for manometric localization of the proximal Lower Esophageal Sphincter (LES) to assist in pH catheter placement.
Regulatory Classification
Identification
A gastrointestinal motility monitoring system is a device used to measure peristalic activity or pressure in the stomach or esophagus by means of a probe with transducers that is introduced through the mouth into the gastrointestinal tract. The device may include signal conditioning, amplifying, and recording equipment. This generic type of device includes the esophageal motility monitor and tube, the gastrointestinal motility (electrical) system, and certain accessories, such as a pressure transducer, amplifier, and external recorder.
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8 2002 NOV
K011471 Page 1 of 5
510(k) Notification 43S11 Polygram 98 pH Testing System (incl. bile)
# 510(k) SUMMARY
as required per 807.92(c)
#### 1. Submitters Name, Address:
Medtronic Functional Diagnostics A/S Tonsbakken 16-18 DK-2740 SKOVLUNDE Tel: + 45 44 57 95 02 Fax: + 45 44 57 90 10 Contact person for this submission: Tove Kjaer Date submission was prepared: May 10, 2001
#### 2. Trade Name, Common Name and Classification Name:
A. Trade Name: Polygram 98 pH Testing System (incl. bile)
B. Common Name, Classification Name, Class and Regulation Number:
| Common Name | Classificat<br>ion<br>Number | Class | Regulation<br>Number |
|------------------------------------|------------------------------|-------|----------------------|
| Bilitec 2000 | 78 FFX | II | 21 CFR 876.1725 |
| Optical Fiber Probe | 78 FFX | II | 21 CFR 876.1725 |
| Polygram 98 pH Testing Application | 78 FFX | II | 21 CFR 876.1725 |
#### 3. Predicate Device Identification:
The functionality and intended use of the Polygram 98 pH Testing System (incl. bile) is equivalent to Medtronic Functional Diagnostics A/S's Polygram 98 pH Testing System (K 981733).
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#### 4. Device Description:
The system is an ambulatory system for use in evaluating reflux disorders in the gastrointestinal tract. The system measures bile online using sensors in the patient. The data is captured and recorded. The data is uploaded from the Bilitec 2000 by use of the Polygram 98 pH Testing Application software for later display, analysis and reporting. In its daily use, a trained technician and/or physician are the main user of the system.
The Main tasks when performing a reflux festing procedure:
- . Prepare equipment including calibration
- . Enter patient demographic information
- perform procedure and obtain relevant data .
- Review, analysis and post procedure activities
- . Create and print a report
#### 5. Intended Use:
The Polygram 98 pH Testing System is intended to record, store, view and analyze esophageal and gastric refluxate data to diagnose reflux disorders. The Polygram 98 pH Testing System can also be used to locate the position of the proximal Lower Esophageal Sphincter (LES) manometrically, to assist in the accurate placement of the pH catheter.
#### 6. Table of Device Similarities and differences to predicate device
| Manufacturer | Medtronic Synectics AB | Medtronic Functional<br>Diagnostics A/S | |
|----------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
| 510(k) number | Predicate Device<br>Polygram 98° pH<br>Testing System, i.e<br>• Digitrapper pH<br>• Polygram '98,<br>pH Testing<br>Application<br>• K 981733 | Modified Device<br>Polygram 98 pH Testing System<br>v2.2 (incl. Bile), i.e<br>• Bilitec 2000<br>• Polygram 98,<br>pH Testing Application v2.2<br>(including Bile) | Polygram 98 software has been<br>updated in order to facilitate<br>upload and analysis of data<br>recorded by the Bilitec 2000<br>device |
| General: | Predicate devics:<br>- all | Modified Device<br>- pH System | Explanation of the differences<br>compared<br>to the Predicate devices |
| Intended Use /<br>Indication of<br>Use | The pH System is<br>intended to record,<br>store, view and analyze<br>esophageal and gastric<br>pH data to diagnose<br>reflux disorders. The pH<br>System can also be<br>used to locate the<br>position of the proximal<br>Lower Esophageal<br>Sphincter (LES)<br>manometrically, to<br>assist in the accurate<br>positioning of the pH<br>catheter | The pH System is intended to<br>record, store, view and analyze<br>esophageal and gastric refluxate<br>to diagnose rellux disorders.<br>The pH System can also be<br>used to locate the position of the<br>proximal Lower Esophageal<br>Sphincter (LES) manometrically,<br>to assist in the accurate<br>positioning of the pH catheter | Same |
| Intended<br>Populations | Pediatric to Adults | Same | |
| Sterilization | Accessories are not<br>supplied sterile,<br>manufacturer label the<br>accessories with<br>cleaning instructions. | Same | |
| Biocompatibility | Catheters are the only<br>part that come into<br>contact with the<br>patients. | Same | |
| Technical<br>Features: | Predicate devices<br>- Digitrapper pH | Modified Device<br>- Bilitec 2000 | Explanation of the differences<br>compared<br>To the Predicate devices |
| Number of<br>Channels | 4 channels pH, 1<br>pressure | 2 channels Bile | |
| Sampling rate | ¼ Hz | 1 Hz with 4, 8 or 16sec<br>averaging time | |
| Memory Size | 2Mb Flash Data RAM | 128 Kbytes flash memory | |
| Event markers | 3 | 1 event marker | |
| Built in memory<br>back up | Now has Flash ram (no<br>backup required). Clock<br>has 14 days backup. | Has Flash ram. | Flash RAM is non-volatile therefor<br>requires no 'backup'. The Bilitec<br>has no clock and no back-up of<br>date/time information is then<br>required |
| Power supply | 2 x 1.5V AA alkaline | 4 x 1,5V AA size alkaline<br>batteries | |
| Measuring<br>range | 0-9 pH | Absorbance from 0 to 1 unit | The spectrophotometric<br>measurement of the absorbance<br>of Bile (bilirubin) is measured in<br>the range of 0 to 1 (0-100%) |
| Recording time | 24 Hours | 24 Hours | |
| Current<br>consumption | 20mA | 30 mA in normal mode and 16<br>mA on average in Sampling/idle<br>mode | The set-up mode and the<br>spectrophotometric measurement<br>requires different levels of current<br>consumption |
| Communication | IrDA Communication<br>(Infra Red) | Serial communication 9600<br>baud | This is a standard serial port as on<br>all PC's. |
| Resolution | Better than 0.01pH | <= 0,004 absorbance unit | |
| Display | 119 by 73 pixel graphic<br>display. | LCD consists of 4 rows with 16<br>characters | |
| Dimension | 115 x 140 x 50 mm | 200mm x 100mm x 35mm | |
| Weight | 300 gr. | 450 gr. | |
| On-line<br>monitoring | Via own Screen | Same | |
| Signals to<br>analyze | pH | PH and Bile | |
| User<br>commands | Menu selections,<br>keyboard combinations,<br>screen "buttons" | Same | |
| Calculated,<br>parameters | 1. Maximum,<br>Minimum<br>2. Duration of period<br>3. Number of acid<br>refluxes<br>4. Number of long<br>acid refluxes<br>5. Longest acid reflux<br>6. Total time pH<br>below 4<br>7. Fraction time pH<br>below 4<br>8. Symptom index<br>9. Symptom Association<br>Probability<br>10. Number of alkaline<br>shifts<br>11. Number of long<br>alkaline shifts<br>12. Longest alkaline<br>shift<br>13. Total tome pH<br>above 8<br>14. Fraction time pH<br>above 8 | Same for pH, plus for Bile<br>analysis:<br>1. Maximum, Minimum<br>2. Duration of period<br>3. Number of bile refluxes<br>4. Number of long bile<br>refluxes<br>5. Longest bile reflux<br>6. Total time bile above 0,14<br>7. Fraction time bile above<br>0,14<br>8. Symptom index<br>9. Symptom Association<br>Probability | Calculated parameters for bile are<br>similar to the pH analysis |
| Scoring,<br>Normals | 15. DeMeester &<br>Johnson (adult)<br>16. Bolx-Ochoa<br>(pediatric)<br>17. Infant normals<br>percentile graph<br>(ESPGAN normals) | Same for pH.<br>NA for the Bile analysis | No scoring system exists for Bile<br>analysis |
| Reports | Signal tracings and<br>reports. Optional<br>selections only. | Same | |
| Patient<br>database | Relational database with<br>logical patient- recording<br>relations | Same | |
| Additional data | User definable additional<br>patient/recording<br>parameters | Same | |
| User help<br>system | Online help system with<br>descriptions of<br>procedures | Same | |
| Signal review<br>method | Time - tracing based | Same | |
| Recording<br>control | Real time monitoring of<br>signals | Same | |
| Recording<br>configuration | A template is used for<br>each type of recording. | Same | |
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K011471
# 510(k) Notification 43S11 Polygram 98 pH Testing System (incl. bile)
Page 3 of 5
{3}------------------------------------------------
# 510(k) Notification 43\$11 Polygram 98 pH Testing System (incl. bile)
Page 4 of 5
Features:
Predicate Device
- Polygram '98, pH
Testing Application
Modified Device - Polygram '98, pH Testing Application v2.2 (including Bile) Explanation of the differences compared to the Predicate devices
{4}------------------------------------------------
#### Page 5 of 5
- 7. Assessment of non-clinical performance data for equivalence:
Verifications results show that the enhanced system performs as its predicate system.
# 8. Assessment of clinical performance data for equivalence:
Clinical trials have not been performed. This new system does not raise any new safety or performance issues.
#### 9. Biocompatability: The Optical Fiber probe has been tested for biocompatibility.
#### 10. Sterilization:
Not applicable
#### 11. Standards and Guidances:
The Polygram 98 pH testing System (incl bile) conforms to the following voluntary and mandatory standards:
- . EN 60601-1, Medical equipment
The following guidances were followed:
- DRAERD Premarket Notification 510(k) Screening checklist, RRG Rev. 3/14/95
- ODE Guidance for the Content of Premarket Submission for Medical Device Containing Software Draft Document
{5}------------------------------------------------
#### DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/5/Picture/1 description: The image shows a circular logo for the Department of Health & Human Services - USA. The logo features a stylized eagle with three curved lines representing its wings. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged around the top half of the circle.
#### Public Health Service
#### 8 2002 NOV
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. Toni Kennet Jørgensen Regulatory Affairs Specialist Medtronic Functional Diagnostics A/S Tonsbakken 16-18 DK-2740 Skovlunde DENMARK
#### Re: K011471
Trade/Device Name: Polygram '98 pH Testing System (incl Bile), Bilitec™ 2000 and Optical Fiber Probe Regulation Number: 21 CFR 8876.1725 Regulation Name: Gastrointestinal motility monitoring system Regulatory Class: II Product Code: 78 FFX Dated: August 9, 2002 Received: August 12, 2002
Dear Mr. Jørgensen:
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 cither class II (Special Controls) or class III (PMA). it may be subject to 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.
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.
{6}------------------------------------------------
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), please contact the Office of Compliance at one of the following numbers, based on the regulation number at the top of this letter:
| . 8xx.1xxx | (301) 594-4591 |
|----------------------------------|----------------|
| 876.2xxx, 3xxx, 4xxx, 5xxx | (301) 594-4616 |
| 884.2xxx, 3xxx, 4xxx, 5xxx, 6xxx | (301) 594-4616 |
| 892.2xxx, 3xxx, 4xxx, 5xxx | (301) 594-4654 |
| Other | (301) 594-4692 |
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 Part 807.97). Other general information on your responsibilities under the Act may be obtained 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/dsmamain.html.
Sincerely yours,
Nancy Chrizdon.
Nancv C. Brogdon Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
Page 2
{7}------------------------------------------------
# Indication for Use Statement
# Page 1 of 1
510(k) Number (if known):_____________________________________________________________________________________________________________________________________________________
.
Device Name: Polygram 98 pH Testing System (incl. bile)
Indications for Use:
The Polygram 98 pH Testing System is intended to record, store, view and analyze esophageal and gastric refluxate data to diagnose reflux disorders. The Polygram 98 pH Testing System can also be used to locate the position of the proximal Lower Esophageal Sphincter (LES) manometrically, to assist in the accurate placement of the pH catheter.
### MRI Compatibility Statement:
The Ambulatory pH System is not compatible for use in a MRI magnetic field.
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
| Concurrence of CDRH, Office of Device Evaluation (ODE) | |
|--------------------------------------------------------|--|
|--------------------------------------------------------|--|
| Prescription Use | <div style="display:inline-block; vertical-align:middle;">/</div> | OR | Over-The-Counter Use ______ |
|----------------------|-------------------------------------------------------------------|----|-----------------------------|
| (Per 21 CFR 801.109) | | | (Optional Format 1-2-96) |
| (Division Sign-Off) | |
|------------------------------------------------------------------|--|
| Division of Reproductive, Abdominal,<br>and Radiological Devices | |
| 510(k) Number | |
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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.
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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.
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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.
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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.
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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.
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Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
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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.