The Propeller System includes the Propeller Sensor Model 2018-S. The sensor is an accessory device intended for singlepatient use to assist physicians and patients in recording and monitoring the actuations of prescribed pMDI usage for the Symbicort device. The Propeller Mobile Application records, stores, and transmits usage events from Propeller Sensors, or via manual user entry, to a remote storage system. With the Propeller Mobile Application the user can review information collected from the pMDI sensor, and report and review symptoms and other information about their disease management and its impact. The user may also share their information with their caregivers, physician, and healthcare providers. The Propeller Web Application is software that, like the Propeller Mobile Application, is intended to allow users to review the collected information and characteristics of their pMDI and its use, to capture other patient-reported information and outcomes, and to allow that information to be shared with their caregivers, physicians, and health care providers. When used with a prescribed pMDI, the system can report on information captured during the normal course of use, such as the time between actuations that can be helpful in assessing pMDI technique. The Propeller System is intended to be used in populations from Child (>2 years) to Adult. The Propeller System can be used both indoors; home, work, and clinical settings, as well as on aircraft. The Propeller System may also be used in clinical trials where researchers need to know information about the use of pMDI medication(s) by a participant. The output of the Propeller System is not intended to diagnosis provided by a licensed physician. The Propeller System is not intended for use as an pMDI dose counter, nor is it intended to indicate the quantity of medication remaining in an pMDI.
Device Story
Propeller Sensor Model 2018-S is a portable accessory that attaches to a Symbicort pMDI; monitors and records date/time of inhaler actuations via internal sensors. Device uses Bluetooth to transmit usage data to Propeller Mobile Application or gateway; data is stored in remote system. Used in home, work, clinical settings, or aircraft by patients. Healthcare providers and caregivers review collected data via Web/Mobile applications to assess pMDI technique and disease management. System does not diagnose, count doses, or measure remaining medication. Benefits include improved monitoring of medication adherence and technique.
Clinical Evidence
No clinical data. Bench testing only, including battery performance, usability, and electrostatic discharge testing to ensure no impact on medication particle size distribution. Compliance with IEC 60601-1, 60601-2, 60601-6, 60601-11, and ISO 10993-5/10 confirmed.
Technological Characteristics
Makrolon Polycarbonate case; Bluetooth wireless connectivity; 3V DC Li-ion battery (1-year life). Dimensions/form factor adapted for Symbicort pMDI. Standards: IEC 60601-1, IEC 60601-2, IEC 60601-6, IEC 60601-11, ISO 10993-5, ISO 10993-10.
Indications for Use
Indicated for patients (Child >2 years to Adult) using prescribed Symbicort pMDI to record and monitor medication actuation events. Not for diagnosis, dose counting, or indicating remaining medication quantity.
Regulatory Classification
Identification
A nebulizer is a device intended to spray liquids in aerosol form into gases that are delivered directly to the patient for breathing. Heated, ultrasonic, gas, venturi, and refillable nebulizers are included in this generic type of device.
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Image /page/0/Picture/0 description: The image contains two logos. On the left is the Department of Health & Human Services logo. On the right is the FDA logo, which includes the letters "FDA" in a blue square, followed by the words "U.S. FOOD & DRUG ADMINISTRATION" in blue text.
March 26, 2020
Reciprocal Labs Corporation Greg Dunkelberger Regulatory Affairs Project Manager 1 S. Pinckney St. Suite 610 Madison, Wisconsin 53703
Re: K192724
Trade/Device Name: Propeller Sensor for Symbicort Regulation Number: 21 CFR 868.5630 Regulation Name: Nebulizer Regulatory Class: Class II Product Code: CAF Dated: February 27, 2020 Received: February 28, 2020
#### Dear Greg Dunkelberger:
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. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. 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. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either 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); medical device reporting of medical device-related adverse events) (21 CFR 803) for
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devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (OS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
James J. Lee Ph.D. Assistant Director DHT1C: Division of ENT, Sleep Disordered Breathing, Respiratory and Anesthesia Devices OHT1: Office of Ophthalmic, Anesthesia, Respiratory, ENT and Dental Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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#### Indications for Use
510(k) Number (if known) K192724
Device Name Propeller Sensor Model 2018-S
#### Indications for Use (Describe)
The Propeller System includes the Propeller Sensor Model 2018-S. The sensor is an accessory device intended for singlepatient use to assist physicians and patients in recording and monitoring the actuations of prescribed pMDI usage for the Symbicort device.
The Propeller Mobile Application records, stores, and transmits usage events from Propeller Sensors, or via manual user entry, to a remote storage system. With the Propeller Mobile Application the user can review information collected from the pMDI sensor, and report and review symptoms and other information about their disease management and its impact. The user may also share their information with their caregivers, physician, and healthcare providers.
The Propeller Web Application is software that, like the Propeller Mobile Application, is intended to allow users to review the collected information and characteristics of their pMDI and its use, to capture other patient-reported information and outcomes, and to allow that information to be shared with their caregivers, physicians, and health care providers.
When used with a prescribed pMDI, the system can report on information captured during the normal course of use, such as the time between actuations that can be helpful in assessing pMDI technique.
The Propeller System is intended to be used in populations from Child (>2 years) to Adult.
The Propeller System can be used both indoors; home, work, and clinical settings, as well as on aircraft.
The Propeller System may also be used in clinical trials where researchers need to know information about the use of pMDI medication(s) by a participant.
The output of the Propeller System is not intended to diagnosis provided by a licensed physician. The Propeller System is not intended for use as an pMDI dose counter, nor is it intended to indicate the quantity of medication remaining in an pMDI.
Type of Use (Select one or both, as applicable)
| Prescription Use (Part 21 CFR 801 Subpart D) | <span></span> |
|----------------------------------------------|----------------------------|
| Over-The-Counter Use (21 CFR 801 Subpart C) | <div> <span></span> </div> |
#### CONTINUE ON A SEPARATE PAGE IF NEEDED.
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#### 510(k) Summary
| Submission Date: | February 24, 2020 |
|------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Submitter: | Reciprocal Labs Corporation<br>1 S. Pinckney St., Ste. 610<br>Madison, WI 53703 |
| Submitter and<br>Official Contact: | Greg Dunkelberger<br>Regulatory Affairs Project Manager<br>Reciprocal Labs Corporation<br>1 S. Pinckney St., Ste. 610<br>Madison, WI 53703<br>+1 (608) 251-0470<br>+1 (844) 411-7475 (fax)<br>greg.dunkelberger@propellerhealth.com |
| Manufacturing<br>Site: | Reciprocal Labs Corporation<br>1 S. Pinckney St., Ste. 610<br>Madison, WI 53703 |
| Trade Name: | Propeller System |
| Model Name: | Propeller Sensor Model 2018-S |
| Common Name: | Nebulizer |
| Classification<br>Name: | NEBULIZER (DIRECT PATIENT INTERFACE) |
| Classification<br>Regulation: | 21 CFR §868.5630 |
| Product Code: | CAF |
| Device<br>Description: | Pressurized Metered Dose Inhaler (pMDI) / Symbicort Accessory<br>that monitors inhaler usage. The portable sensor mounts to the<br>back of the pMDI and records inhalation events when the inhaler<br>is used. |
Section 5.1 Page 1 of 7
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| Substantially Equivalent Devices: | K180770 Propeller Sensor Model 2017-B |
|-----------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Indications For Use: | The Propeller System includes the Propeller Sensor Model 2018-S. The sensor is an accessory device intended for single-patient use to assist physicians and patients in recording and monitoring the actuations of prescribed pMDI usage for the Symbicort device. |
| | The Propeller Mobile Application records, stores, and transmits usage events from Propeller Sensors, or via manual user entry, to a remote storage system. With the Propeller Mobile Application the user can review information collected from the pMDI sensor, and report and review symptoms and other information about their disease management and its impact. The user may also share their information with their caregivers, physician, and healthcare providers. |
| | The Propeller Web Application is software that, like the Propeller Mobile Application, is intended to allow users to review the collected information and characteristics of their pMDI and its use, to capture other patient-reported information and outcomes, and to allow that information to be shared with their caregivers, physicians, and health care providers. When used with a prescribed pMDI, the system can report on information captured during the normal course of use, such as the time between actuations that can be helpful in assessing pMDI technique. |
| | The Propeller System is intended to be used in populations from Child (>2 years) to Adult. |
| | The Propeller System can be used both indoors and outdoors; home, work, and clinical settings, as well as on aircraft. The Propeller System may also be used in clinical trials where researchers need to know information about the use of pMDI medication(s) by a participant. |
| | The output of the Propeller System is not intended to diagnose or replace a diagnosis provided by a licensed physician. The Propeller System is not intended for use as an pMDI dose |
Section 5.1 Page
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counter, nor is it intended to indicate the quantity of medication remaining in an pMDI.
Technology The Propeller Sensor Model 2018-S keeps track of medication Comparison: use, with a record of when the pressurized metered dose inhaler is used. The sensor is a small device that attaches to the existing inhaler. Both the subject device and the predicate devices use technology that includes bluetooth wireless connectivity which connects to the previously cleared Propeller Health software system together with a mobile phone or wireless gateway.
> The Propeller Sensor Model 2018-S and the predicate (K180770) have the same technological characteristics, both devices are bluetooth enabled sensors fixed to inhalers designed to detect medication use. The changes below only reflect a change to support the Symbicort form factor.
| Technology<br>Characteristic | Predicate Device:<br>Propeller System,<br>Propeller Sensor<br>Model 2017-B<br>510k Number:<br>K180770 | Candidate Device:<br>Propeller System,<br>Propeller Sensor<br>Model 2018-S<br>510k Number:<br>K192724 |
|-------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Design -<br>Attachment to<br>Medication<br>Dispenser | Physically attaches<br>to DPI without<br>inhibiting patient<br>use | Physically attaches<br>to pMDI without<br>inhibiting patient<br>use |
| Principle of<br>Operation | The Propeller Health<br>Sensor attaches to<br>the medication<br>canister and<br>performs wireless<br>uploading of usage<br>history of the DPI | The Propeller Health Sensor<br>attaches to<br>the medication<br>canister and<br>performs wireless<br>uploading of usage<br>history of the pMDI |
| Output port and<br>Computer<br>Interface | Wireless uploading<br>to<br>database; viewed by<br>PC or other<br>Internet-capable<br>device. | Same |
| Data Collection<br>Technology | Records date and<br>time of DPI usage by<br>monitoring<br>actuation<br>of the DPI via<br>sensors | Records date and<br>time of pMDI usage<br>by monitoring<br>actuation of the<br>pMDI via sensors |
| Mobile Platforms | • iOS versions 10<br>or higher<br>• Android<br>operating system | • iOS versions 11<br>or higher<br>• Android<br>operating system |
| Required Off the<br>Shelf Hardware | • Apple<br>smartphones or<br>devices with<br>Bluetooth, iOS 10<br>or higher<br>• Android<br>smartphones or<br>devices with<br>Bluetooth and<br>operating system<br>version of 4.4<br>and up for app<br>• Internet capable<br>device; no<br>processor or<br>memory<br>requirements<br>(see Required<br>Browser) | • Apple<br>smartphones or<br>devices with<br>Bluetooth, iOS 11<br>or higher<br>• Android<br>smartphones or<br>devices with<br>Bluetooth and<br>operating system<br>version of 5.0<br>and up for app<br>• Internet capable<br>device; no<br>processor or<br>memory<br>requirements<br>(see Required<br>Browser) |
| Required | Firefox, Chrome, | Same |
| Browser | Safari , Internet<br>Explorer | |
| Mobile<br>Application | The Propeller Health<br>Mobile Application<br>records, stores, and<br>transmits usage<br>events from the<br>Propeller Health<br>Sensor via a feature<br>or smartphone. In<br>addition, the mobile<br>application can be<br>used to review the<br>Information<br>captured when using<br>a smartphone | Same |
| Software | The Propeller Health<br>Web Application is<br>software intended<br>to allow users to<br>review the collected<br>information and<br>characteristics of<br>DPI use, to add<br>detail associated<br>with a recorded<br>usage event, and to<br>share that<br>information with<br>their physician in<br>order to provide<br>additional<br>information<br>associated with the<br>condition for which<br>their DPI<br>medication(s) are<br>prescribed. | The Propeller<br>Health Web<br>Application is<br>software intended<br>to allow users to<br>review the<br>collected<br>information and<br>characteristics of<br>pMDI use, to add<br>detail associated<br>with a recorded<br>usage event, and to<br>share that<br>information with<br>their physician in<br>order to provide<br>additional<br>information<br>associated with the<br>condition for which<br>their pMDI<br>medication(s) are<br>prescribed. |
| Dose Counter | No | Same |
| Records Usage | Yes | Same |
| Records Location<br>of Usage (GPS<br>Coordinates) | Geographic<br>coordinates can be<br>captured by the<br>wireless device if<br>paired with a<br>sensor. | Same |
| Keyboard/Input<br>Interface | Single button<br>interface | Same |
| Digital Display | No | Same |
| Power Source | 1 internal 3V DC<br>Li-ion Battery | Same |
| Battery Life | 1 year | Same |
| Low Battery<br>Indicator | Yes, light<br>combination;<br>software display of<br>battery life. | Same |
| Patient<br>Reminder | Yes | Same |
| Support | Yes | Same |
| Patient Data<br>Storage with<br>Software | Yes | Same |
| Patient Data<br>Report<br>Generation with<br>Software | Yes | Same |
| Patient Data<br>Graphs<br>Generation | Yes | Same |
Section 5.1 Page 3 of 7
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Section 5.1 Page 5 of 7
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Section 5.1 Page 6 of 7
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| Data Retrieval<br>from Device<br>w/Software | Yes | Same |
|-----------------------------------------------------------------|---------------------|---------------------------|
| Case Material -<br>Patient Contact<br>by intact skin<br>(hands) | Lexan Polycarbonate | Makrolon<br>Polycarbonate |
Test Summary: Test results indicate that the Propeller Sensor Model 2018-S and its predicate Propeller Sensor Model 2017-B complies with predetermined specifications. Software verification and validation testing confirms this result.
> Compliance to IEC 60601-1, IEC 60601-2, IEC 60601-6, IEC 60601-11, ISO 10993-5, and ISO 10993-10 was confirmed.
Bench testing included battery performance testing, usability testing, and electrostatic discharge testing (to verify the device does not affect particle size distribution of the medication).
- Clinical Testing: No clinical testing was required
Conclusion: The technology differences are minor between the candidate and predicate device. The overall testing confirms that the Propeller Sensor Model 2018-S is substantially equivalent to the predicate device.
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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
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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.
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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
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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.