K973920 · Respironics, Inc. · MNR · May 14, 1998 · Anesthesiology
Device Facts
Record ID
K973920
Device Name
STARDUST
Applicant
Respironics, Inc.
Product Code
MNR · Anesthesiology
Decision Date
May 14, 1998
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 868.2375
Device Class
Class 2
Indications for Use
The Stardust is a respiratory disorder diagnostic device that is intended to measure and record five parameters. These parameters are percent SpO2 (functional), pulse rate, oral/nasal airflow, respiratory effort, and body position (i.e., supine or non-supine). It can also be connected to a Respironics Virtuoso Smart CPAP System to record and display continuous positive airway pressure (CPAP) and airway index level. The Stardust can be used as a stand-alone unit for recording data. It also interfaces with a commercially available IEC 950 compliant computer, which enables you to view data real-time in a recording mode. The Stardust does not have any audible alarms and, therefore, should not be used for continuous monitoring of oxygen saturation or as a replacement for pulse oximeter monitors.
Device Story
Stardust is a low-power, diagnostic recording device for respiratory disorders. It captures SpO2, pulse rate, oral/nasal airflow, respiratory effort, and body position; optionally records CPAP and airway index via connection to Respironics Virtuoso Smart CPAP. Used in hospital/institutional (supervised) or home (unsupervised) settings. Data is recorded on-device or viewed real-time on an IEC 950 compliant computer via RS232. Clinicians use proprietary Windows-based SleepWare software to analyze waveforms, set markers, and perform manual or automatic scoring of apnea/hypopnea events. Output assists clinicians in diagnosing sleep apnea. Device lacks audible alarms; not for continuous monitoring.
Clinical Evidence
Bench testing only. Performance verified through electrical safety, electromagnetic compatibility, and mechanical/environmental testing compliant with Draft FDA Reviewer Guidance for Premarket Notifications (November 1993). No clinical data provided.
Technological Characteristics
Low-power diagnostic recorder. Interfaces with external sensors (airflow, thermistor, respiratory effort, finger probe). Connectivity via RS232 to PC. Software-based analysis. Compliant with IEC 950 for computer interface. No audible alarms.
Indications for Use
Indicated for diagnosis of respiratory disorders, such as sleep apnea, in patients weighing >30 kg. Not for use with infants.
Regulatory Classification
Identification
A breathing (ventilatory) frequency monitor is a device intended to measure or monitor a patient's respiratory rate. The device may provide an audible or visible alarm when the respiratory rate, averaged over time, is outside operator settable alarm limits. This device does not include the apnea monitor classified in § 868.2377.
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# MAY
Premarket Notification Section 510(k) Section 1 - Summary of Safety and Effectiveness
K973920
Stardust
# SUMMARY OF SAFETY & EFFECTIVENESS
Image /page/0/Picture/4 description: The image shows the logo for RESPIRONICS INC. The logo consists of a triangle with a stylized figure inside, followed by the text "RESPIRONICS INC." and the registered trademark symbol. Below the company name is the address "1001 Murry Ridge Drive, Murrysville, PA 15668".
| Official Contact | Raj S. Kasbekar<br>Engineer, Regulatory Affairs<br>Respironics, Inc.<br>1001 Murry Ridge Drive<br>Murrysville, PA 15668 |
|--------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Classification Reference | 21 CFR 870.2700 |
| Common/Usual Name | pulse oximeter |
| Proprietary Name | Stardust |
| Internal Project Name | One Night Stand (ONS) |
| Predicate Devices | HMS 4000 (K914620/A)<br>Respironics, Inc.<br>1001 Murry Ridge Drive<br>Murrysville, PA 15668<br><br>HMS 5000 (K914085)<br>Respironics, Inc.<br>1001 Murry Ridge Drive<br>Murrysville, PA 15668 |
| Reason for submission | New Device |
# Substantial Equivalence
This premarket notification section 510(k) submission demonstrates that the Stardust is substantially equivalent to the Respironics HMS 4000 (K914620/A) and the Respironics HMS 5000 (K914085), all of which have the same intended use.
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Testing was performed to demonstrate that the performance of the Stardust in its intended environment is as safe and effective as that of the legally marketed predicate devices. The safety and effectiveness of Stardust were verified through performance-related testing that consisted of Electrical Safety, Electromagnetic Compatibility, Mechanical and Environmental Testing. The Stardust was tested and found compliant with the standards referenced in the "Draft FDA Reviewer Guidance for Premarket Notifications," November 1993.
# Device Description/Intended Use
A low-power, diagnostic, recording device that interfaces with predefined sensors, and processes and records physiologic patient data.
The Stardust is a respiratory disorder diagnostic device that is intended to be used to measure and record five parameters. These parameters are:
- D percent SpO, (functional)
- 0 pulse rate
- oral/nasal airflow
- 0 respiratory effort
- body position (i.e., supine or non-supine) o
It can also be connected to a Respironics Virtuoso Smart CPAP System to record and display continuous positive airway pressure (CPAP) and airway index level. The Stardust can be used as a stand alone unit for recording data. It also interfaces with a commercially available IEC 950 compliant computer and can be used to view data real-time in a recording mode. The Stardust does not have any audible alarms and, therefore, should not be used for continuous monitoring.
# Software
The pulse oximetry data, raw infrared and red waveform data, pulse rate data, airflow data, respiratory effort data and position data can be viewed real-time on a computer using Respironics' custom Windows™-based software that is provided with the Stardust. The software also enables the clinician to do some data analysis, which can be used to draw meaningful implications during sleep apnea analysis.
# Indications for Use
The Stardust is indicated for use in the diagnosis of respiratory disorders, such as sleep apnea.
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# Environment of Use/Patient Population
The Stardust is intended for the hospital/institutional environment (supervised) and the home (unsupervised) environment for patients weighing more than 30 kg. It is not intended for use with infants.
## Contraindications:
. ﻣﺤ
- The pulse oximeter module of the Stardust is not intended for use during magnetic resonance o imaging (MRI) procedures or in an MRI environment.
- As with any pulse oximeter, the pulse oximeter module of the Stardust is not intended for use O on patients, such as heavy smokers, with high carbon monoxide (CO) blood content.
- The pulse oximeter module of the Stardust is not intended for use in any application in 0 requiring fractional saturation measurements.
- The pulse oximeter module of the Stardust is not intended for use as an apnea monitor.
# Stardust Accessories
The Stardust can be used with the following accessories:
- EPM Infinity Reusable Airflow Sensor (K922112A) 0
- Bionique Reusable Thermistor Assembly (K912427) 0
- EPM Resp-Ez Respiratory Effort Sensor (K903300A) 0
- Criticare Finger Probe (Clip) (K961223) 0
- Windows Diagnostic Software (proprietary name: SleepWare) 0
- 0 RS232 cable
- RS232 adapter box 0
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Image /page/3/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 three human profiles facing right, stacked on top of each other, with flowing lines extending from the heads.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
MAY 1 4 1998
Mr. Raj S. Kasbekar Respironics, Inc. 1001 Murry Ridge Drive Murrysville, PA 15668-8550
Re: K973920 Stardust Regulatory Class: II (two) Product Code: 73 MNR February 13, 1998 Dated: February 13, 1998 Received:
Dear Mr. Kasbekar:
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 to 895. A substantially equivalent determination assumes compliance with the current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic (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.
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### Page 2 - Mr. Raj S. Kasbekar
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 requlation 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. Callahan
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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## 510(k) Number (if known): K973920
### Device Name: Stardust
### Intended Use/Indications for Use
### Intended Use:
The Stardust is a respiratory disorder diagnostic device that is intended to measure and record five parameters. These parameters are percent SpO2 (functional), pulse rate, oral/nasal airflow, respiratory effort, and body position (i.e., supine or non-supine). It can also be connected to a Respironics Virtuoso Smart CPAP System to record and display continuous positive airway pressure (CPAP) and ainway index level.
The Stardust can be used as a stand-alone unit for recording data. It also interfaces with a commercially available IEC 950 compliant computer, which enables you to view data real-lime in a recording mode. The Stardust does not have any audible alarms and, therefore, should not be used for continuous monitoring of oxygen saturation or as a replacement for pulse oximeter monitors.
### Software
The pulse oximetry data, raw infrared and red waveform data, pirflow data, respiratory effort data and position data can be viewed real-time on the computer using Respironics' custom Windows™-based software (SleepWare) provided with the Stardust. The software also enables the clinician to do some data analysis, which can be used to draw meaningful implications during sleep apnea analysis."
Indications for Use: The Stardust is indicated for use in the diagnosis of respiratory disorders, such as sleep apnea.
#### Environment of Use/Patient Population:
The Stardust is intended for the hospitallinstitutional environment (supervised) and the home (unsupervised) environment for patients weighing more than 30 kg. It is not intended for use with infants.
### Contraindications:
- The pulse oximeter module of the Stardust is not intended for use during magnetic resonance imaging . (MRI) procedures or in an MRI environment.
- . As with any pulse oximeter, the pulse oximeter module of the Stardust is not intended for use on patients, such as heavy smokers, with high carbon monoxide (CO) blood content.
- . The pulse oximeter module of the Stardust is not intended for use in any application requiring fractional saturation measurements.
- . The pulse oximeter module of the Stardust is not intended for use as an apnea monitor.
### * The software also enables the user to ...............................................................................................
- . Create, edit, delete and print patient information
- . View waveform recordings/ table data
- . Edit waveform recordings
- . Set event, bad, and wake markers
- Perform data analysis using manual or auto-scoring (see below) .
- . Print results graphically
- . Set the recorder's internal real-time clock
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- Clear the recorder's memory .
- Generate a patient report .
- Display status, session #, battery voltage, memory usage .
Manual scoring lets the operator view the waveform recording , look at specific events and determine the event (type of apnea or hypopnea using his/her own judgement) based on the waveform or event parameters.
Automatic scoring classifies the event for a region of data or for the entire recording and using certain rules automatically displays the event type (type of apnea or hypopnea) on the screen. The rules for scoring can be set by the operator in terms of start parameters (parameters used to start the apnea or hypopnea such as minimum event duration and peak inspiratory value) and termination parameters used to terminate the apnea or hypopnea such as maximum event duration, peak inspiratory value, number of breaths to terminate event and maximum time between breaths).
For example,
1) If the start parameters for apnea are set as
Minimum event duration
10 seconds
20% of local IRA.
Peak Inspiratory Value to start an event
then the scoring algorithm will classify any breath event with amplitude below 20% and with a minimum event duration of 10 seconds as an apnea.
2) If the start parameters for hypopnea are set as
Minimum event duration .10 seconds
Peak Inspiratory Value to start an event 66%.
then the scoring algorithm will classify any breath event with amplitude below 66% and with a minimum event duration of 10 seconds as hypopnea.
3) If the termination parameters for apnea are set as
| Maximum event duration | 5 min |
|-----------------------------------------|------------------|
| Peak Inspiratory Value to end an event | 40% of local IRA |
| Number of breaths to terminate an event | 1 |
| Maximum Time between Breaths | 10 seconds, |
then the scoring algorithm will stop the apnea classification whenever it encounters a duration of 5 minutes with the breath amplitude above 40% of the local IRA.
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4) If the termination parameters for apnea are set as
| Maximum event duration | 5 min |
|-----------------------------------------|------------------|
| Peak Inspiratory Value to end an event | 80% of local IRA |
| Number of breaths to terminate an event | 1 |
| Maximum Time between Breaths | 10 seconds, |
then the scoring algorithm will stop the hypopnea classification whenever it encounters a duration of 5 minutes with the breath amplitude above 80% of the local IRA.
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE) Prescription Use OR Over-The-Counter Use (Per 21 CFR 801.109) (Optional Format 1-2-96)
Thomas J. Callahan
(Division Sign-Off) (Division Sign=Gigr=Girlar, Respirato and Neurological Devices 510(k) Number
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.