The bubble humidifier is a device that is intended to add moisture to breathing gases for administration to a patient. The bubble humidifier is indicated for use with oxygen concentrators or gas sources in homecare, hospital, extended care facilities and hospice environments. The bubble humidifier is a non-sterile device indicated for single-patient usage. The device is indicated for patients who require humidification of high flow supplemental breathing gases.
Device Story
Non-sterile, disposable bubble humidifier; adds moisture to breathing gases. Input: breathing gas from oxygen concentrators, cylinders, or wall outlets. Operation: gas passes through diffuser submerged in water reservoir; 360° diffuser ports disperse gas, minimize backpressure, and ensure quiet operation. Output: humidified breathing gas delivered via face masks or cannulas. Includes 6 PSI safety valve and audible pressure relief mechanism for downstream occlusion notification. Used in homecare, hospital, extended care, and hospice environments; operated by clinicians or patients. Benefits: prevents airway drying during high-flow oxygen therapy.
Clinical Evidence
Bench testing only. Device verified and validated against design requirements, user needs, and intended use. Testing performed per ISO 10993 for biocompatibility and ASTM F1690-96 (2004) for safety and performance. All acceptance criteria met.
Technological Characteristics
Materials: ABS, PVC, PP, Brass. Sensing/Actuation: Mechanical bubble diffusion; 6 PSI pressure relief valve; audible occlusion alarm. Form factor: 350 ml bottle with lid and interface connectors. Connectivity: None. Sterilization: Non-sterile. Standards: ASTM F1690-96 (2004), ISO 10993-1:2000.
Indications for Use
Indicated for patients requiring humidification of high flow supplemental breathing gases delivered via oxygen concentrators or gas sources in homecare, hospital, extended care, or hospice settings. Single-patient use only.
Regulatory Classification
Identification
A respiratory gas humidifier is a device that is intended to add moisture to, and sometimes to warm, the breathing gases for administration to a patient. Cascade, gas, heated, and prefilled humidifiers are included in this generic type of device.
American Bantex Humidifier Bottle, 6 PSI (Model B9001) (K041963)
Submission Summary (Full Text)
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| 5. | 510(k) Summary | K113542 |
|----------|--------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------|
| Date: | August 6, 2011 | |
| Contact: | Salter Labs<br>100 W. Sycamore Road<br>Arvin, CA 93203 | |
| | Michael Shoup<br>Vice President Quality/Regulatory<br>Phone: 800-421-0024<br>Fax: 661-854-3850<br>Email: mshoup@salterlabs.com | |
| | Trade Name: | Salter Lab Bubble Humidifier (High Flow) |
| | Common Name: | Bubble Humidifier (High Flow) Model #7900 |
| | Classification Name: | Respiratory gas humidifier |
| | Classification: | 21 CFR 868.5450 Respiratory gas humidifier, Class II |
| | Product Code: | BTT |
### Predicate Devices:
| Predicate<br>510(k) | Device Name | Intended Use | Clearance<br>Date | Company |
|---------------------|--------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------|------------------------------------------|
| K991484 | AirLife® Bubble<br>Humidifier<br>(Model 002006) | Humidifiers are defined as a<br>device that is intended to add<br>moisture to, and sometimes to<br>warm, the breathing gases for<br>administration to a patient. | May 13, 1999 | CareFusion<br>(cleared as<br>Allegiance) |
| K041963 | American<br>Bantex<br>Humidifier<br>Bottle, 6 PSI<br>(Model B9001) | The American Bantex<br>Humidifier is intended for use<br>with Oxygen Concentrators in<br>a patients home, physicians<br>office or hospital/institutional<br>environment. The humidifier<br>increases the moisture content<br>of the airstream gases for<br>administration to the patient. | Oct. 20, 2004 | American Bantex<br>Corporation |
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| Device Description: | The Salter Labs Bubble Humidifier (High Flow) is an empty,<br>disposable, non-sterile device that is intended to humidify<br>breathing gas prior to delivery to a patient. The Salter Labs<br>Bubble Humidifier (High Flow) is provided with a 6 PSI safety<br>valve and can operate within flow rates of 6 to 15 LPM. The<br>device is used with various breathing gas sources (i.e., oxygen<br>concentrators, gas cylinders and wall outlets) and provides<br>connection for delivery of humidified breathing gas via face<br>masks and cannulas, and use of optional oxygen tubing and<br>water traps. |
|-------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| | The device is made of a humidifier bottle which is used to hold<br>water during use, a lid which seals the humidifier bottle and<br>houses the different interface connectors, an audible pressure<br>relief mechanism to notify the user of a downstream occlusion<br>and a diffuser located inside the humidifier bottle that is<br>designed to uniformly disperse the gas throughout the water.<br>The 360° diffuser ports also provide quiet operation and<br>minimize system backpressure. Both the bottle and lid are<br>constructed to be easy to grip and reduce the chance of cross<br>threading. The jar is permanently marked with<br>minimum/maximum water levels. |
| Intended Use/Indication<br>For Use: | The bubble humidifier is a device that is intended to add<br>moisture to breathing gases for administration to a patient.<br>The bubble humidifier is indicated for use with oxygen<br>concentrators or gas sources in homecare, hospital, extended<br>care facilities and hospice environments. The bubble<br>humidifier is a non-sterile device indicated for single-patient<br>usage. The device is indicated for patients who require<br>humidification of high flow supplemental breathing gases. |
| Technological<br>Characteristics: | Salter Bubble Humidifier (High Flow) is substantially<br>equivalent to the predicate device with regards to design,<br>materials, performance and intended use. The difference is in<br>the operating gas flow rates of 6 to 15 LPM that still produces<br>a humidifier output of at least 10mgH2O/L in accordance with<br>ASTM F1690 (Clause 49.1). |
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NA A A L A M I T A M IS C A F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F
| Feature/Performance | Salter Labs . | American Bantex | CareFusion<br>(Allegiance)<br>AirLife® |
|------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|-----------------------------------------------------------------------|
| Model # | 7900 | B9001 | 2006 |
| Method of Humidification | Gas bubbles<br>through the<br>diffuser submerged<br>in a user-filled,<br>water<br>reservoir/bottle and<br>enters the patient<br>breathing gas<br>circuit | Same | Same |
| Gas Flow Range | 6 - 10 LPM<br>Concentrator,<br>6 - 15 LPM Wall<br>Source | Not Specified | Not Specified |
| Pressure Relief Value | .6 PSI | .6 PSI | .6 PSI |
| Audible Notification of<br>Occlusion | Yes | Yes | Yes |
| Materials of Construction | ABS<br>PVC<br>PP<br>Brass | ABS<br>PVC<br>PP<br>Brass | High Impact PS<br>PP<br>Brass |
| This product is not made<br>with natural rubber latex | Yes | Not Specified | Label states “Latex<br>Free” |
| Bottle Capacity | 350 ml | Not Specified | 370 ml |
| Used with Oxygen<br>Concentrators, Gas<br>Cylinders and Wall Outlets | Yes | Yes | Not Specified |
| Complies with applicable<br>clauses of ASTM F1690-96<br>(2004) and ISO 10993-1:<br>2000 (Biocompatibility) | Yes | Not Specified, no<br>declaration of<br>conformity to this<br>standard | Not Specified, no<br>declaration of<br>conformity to this<br>standard |
## Assessment of Non-Clinical Testing
Non-clinical testing of the Salter Bubble Humidifier (High Flow) has been performed against requirements for performance, physical attributes, environmental conditions, materials and safety, and to provide objective evidence that the device's intended use is met. As applicable to the requirements, testing was performed in accordance with ISO
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| | 10993, “Biological Evaluation of Medical Devices” for |
|-------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| | biocompatibility and ASTM F1690-96 (Reapproved 2004), |
| | “Standard Specification for Humidifiers for Medical Use-Part |
| | 1: General Requirements for Active Humidification Systems’ |
| | for safety and performance. All acceptance criteria from |
| | testing were met. |
| Conclusion: | The Salter Bubble Humidifier (High Flow) has been verified<br>and validated against design requirements, user needs and<br>intended uses. Based on this testing and the comparison of<br>design, materials, performance and intended use, the Salter<br>Bubble Humidifier (High Flow) raises no new questions<br>concerning safety and effectiveness, and is thus substantially<br>equivalent to the predicate devices. |
.
:
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Image /page/4/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 words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized image of an eagle with three lines representing its wings.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002
Salter Labs, Arvin Facility C/O Mr. Casey Conry Responsible Third Party Official Underwriters Laboratories, Incorporated 1285 Walt Whitman Road Melville, New York 11747
FEB 1 0 2012
Re: K113542
Trade/Device Name: Salter Lab Bubble Humidifier (High Flow) Regulation Number: 21 CFR 868.5450 Regulation Name: Respiratory Gas Humidifier Regulatory Class: II Product Code: BTT Dated: January 25, 2012 Received: January 26, 2012
Dear Mr. Conry:
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. 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.
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### Page 2 - Mr. Conry
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 (reporting of medical device-related adverse events) (21 CFR 803); 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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices /ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Wh for
Anthony D. Watson, B.S., M.S., M.B.A. Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
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# Bubble Humidifier (High Flow)
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1
#### 4. Indications for Use
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510(k) Number (if known): New 510(k)
| Device Name: | Salter Lab Bubble Humidifier (High Flow) |
|----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Indications for Use: | The bubble humidifier is a device that is intended to add<br>moisture to breathing gases for administration to a patient. |
| | The bubble humidifier is indicated for use with oxygen<br>concentrators or gas sources in homecare, hospital, extended<br>care facilities and hospice environments. The bubble<br>humidifier is a non-sterile device indicated for single-patient<br>usage. The device is indicated for patients who require<br>humidification of high flow supplemental breathing gases. |
Prescription Use _ X_
AND/OR
Over-The-Counter Use
(Part 21 CFR 801 Subpart D)
(21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
L. Schultze
(Division Sign-Off) Division of Anesthesiology, General Hospital Infection Control, Dental Devices
510(k) Number: _______________________________________________________________________________________________________________________________________________________________
1,
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.