K111640 · Vapotherm, Inc. · BTT · Oct 7, 2011 · Anesthesiology
Device Facts
Record ID
K111640
Device Name
PRECISION FLOW(R) - HELIOX
Applicant
Vapotherm, Inc.
Product Code
BTT · Anesthesiology
Decision Date
Oct 7, 2011
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 868.5450
Device Class
Class 2
Attributes
Therapeutic, Pediatric
Indications for Use
The Precision Flow® - Heliox is intended to warm and add moisture to breathing gases from an external source for administration to neonate/infant, pediatric and adult patients in the hospital and sub-acute institutions. It adds heat and moisture to a blended medical heliox (79% helium. 21% oxygen)/oxygen mixture and assures the integrity of the precise heliox (79% helium, 21% oxygen)/oxygen mixture via an integral oxygen analyzer. The flow rates may be from 1 to 40 liters per minute via nasal cannula.
Device Story
Precision Flow®-Heliox is a respiratory gas humidifier/blender; inputs are external heliox and oxygen gas sources. Device uses electronic blender with mass flow sensors to mix gases based on operator-set flow and oxygen percentage; proportional solenoid valves control gas flow. Integral oxygen analyzer monitors mixture integrity. Humidification occurs via disposable vapor transfer cartridge using membrane technology; no direct water-gas contact. Warmed, humidified gas delivered via triple-lumen heated tube and nasal cannula. Used in hospitals/sub-acute institutions by clinicians. Main unit contains electronics/sensors; disposable module contains water reservoir/pump. Provides real-time monitoring of flow, FiO2, and temperature; triggers alarms for faults (e.g., water level, blocked tube, gas supply). Battery backup maintains settings for 15 minutes. Benefits include precise heliox/oxygen delivery, integrated humidification, and reduced user error compared to manual blending systems.
Clinical Evidence
Bench testing only. Device met requirements for ISO 8185 (humidifiers), ISO 11195 (gas mixers), and electrical safety/EMC standards (IEC 60601 series). Performance data confirmed accurate blending of heliox/oxygen and effective humidification. No clinical data presented.
Technological Characteristics
Electronic/mechanical respiratory humidifier. Materials: polymer membrane in vapor transfer cartridge. Sensing: mass flow sensors, oxygen sensor, pressure/temperature/water level sensors. Energy: AC power with internal battery backup. Connectivity: standalone. Sterilization: N/A (disposable gas pathway). Software: firmware-controlled blending and alarm management.
Indications for Use
Indicated for neonate, infant, pediatric, and adult patients requiring warmed, humidified heliox (79% helium/21% oxygen) and oxygen therapy in hospital or sub-acute settings. Flow rates 1-40 L/min via nasal cannula.
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.
Predicate Devices
Precision Medical, Inc. Heliox/Oxygen Blender (K090781)
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K111640
#### 510(k) SUMMARY
#### Vapotherm, Inc.'s Precision Flow® - Heliox
OCT - 7 2011
## Submitter's Name, Address, Telephone Number, Contact Person and Date Prepared
Vapotherm, Inc. 198 Log Canoe Circle Stevensville, Maryland 21666
410-604-0808 Ext. 209 Phone: Facsimile: 410-604-3978
Contact Person: Gregory A. Whitney
Date Prepared: September 26, 2011
#### Name of Device and Name/Address of Sponsor
Precision Flow® - Heliox
Vapotherm, Inc. 198 Log Canoe Circle Stevensville, Maryland 21666
#### Common or Usual Name
Humidifier, Respiratory Gas (Direct Patient Interface) ... .
#### Classification Name
Humidifier, Respiratory Gas (Direct Patient Interface)
#### Predicate Device
Primary Device: Precision Medical, Inc. Heliox/Oxygen Blender, K090781 Secondary Device: Precision Flow® - Air, K072845
The Precision Medical device is a mechanical device and the Precision Flow® device is electronic/mechanical device. The Precision Medical predicate device is compared to the Precision Flow® device for mechanical aspects and the Precision Flow® - Heliox is compared to the Precision Flow® - Air for electronic functions. The Precision Medical
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device depends on adding external stand alone devices (i.e. flowmeter, oxygen analyzer) to it for some functions. The Precision Flow® - Heliox has the same functions residing in the unit.
### Intended Use / Indications for Use
The Precision Flow® - Heliox is intended to warm and add moisture to breathing gases from an external source for administration to neonate/infant, pediatric and adult patients in the hospital and sub-acute institutions. It adds heat and moisture to a blended medical heliox (79% helium. 21% oxygen)/oxygen mixture and assures the integrity of the precise heliox (79% helium, 21% oxygen)/oxygen mixture via an integral oxygen analyzer. The flow rates may be from 1 to 40 liters per minute via nasal cannula.
## Technological Characteristics
The Precision Flow® - Heliox consists of two parts:
and the more of the comments of the first and with a
The main unit which contains all the electrical and electronic components including the electronic blender and flow controllers. All the sensors are located in the main unit. The main unit has no water pathways and the gas pathway contains only dry gas at room temperature, and consequently does not need internal cleaning or disinfection.
The disposable components comprising the disposable water module, vapor transfer cartridge and heated delivery tube. Conditions in the circulating water and gas streams are sensed remotely via the interface between the main unit and the disposable module.
## 1. Main unit:
- · The flow of heliox and oxygen is measured by mass flow sensors. The mass flow sensors are configured for the specific gravity of the type of breathing gas. The blending function is independent from the type of gas. The operating software calculates the required flow of each needed to reach the target flow and oxygen percentage set by the operator. The system controls gas flows accordingly by adjusting proportional solenoid valves on the gas lines. An oxygen sensor monitors the gas mixture and signals any discrepancy between target and measured percentage. The oxygen sensor is automatically calibrated with oxygen at power-up and every 24 hours.
- · Firmware running in the main unit uses sensors to monitor gas pressure, water level and water temperature, and to detect air leaks into the water circuit (bubble detector). Alarms are displayed if any parameters are
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outside the normal range. Other indicators show low charge in the backup battery, and the type of cartridge installed. An internal battery backup will maintain the set flow and oxygen blend for at least 15 minutes without AC power.
#### 2. Disposable components:
- · Vapor Transfer Cartridge. In the cartridge blended gas passes through membrane made of a specially developed polymer. Warm water circulates and diffuses as vapor through the membrane material into the gas stream. Unlike most humidifiers, there is no direct contact between the water and gas streams. The gas stream leaves the cartridge essentially saturated with vapor at the set temperature.
- · Triple-lumen heated delivery tube. The warmed humidified gas passes through the center lumen. The center lumen is surrounded by two outer lumens carrying warmed water to maintain the temperature of the inner lumen and to minimize rain-out. A proprietary short nasal cannula is connected to the end of the delivery tube and passes the humidified breathing gas to the patient's nose.
- · Disposable module. The module houses a water reservoir, pump, connections for the cartridge and delivery tube, and sensor interfaces to the main unit. Water is pumped past a heater plate through the outer lumens of the delivery tube. Returning water passes through the outer jacket of the Vapor Transfer Cartridge where some water is lost as vapor to the gas stream. There is no direct contact between water and gas flows. The water then returns to the pump reservoir. Heater power is adjusted continuously to maintain the set temperature. Water flows into the circuit from the water bag to replace evaporative losses in the Vapor Transfer Cartridge. Air is purged to atmosphere from the circulation via a hydrophobic filter membrane.
The device front panel has a LCD display which performs the following functions:
- Displays .
- o Gas flow
- o Delivered oxygen concentration
- Temperature of gas delivered 0
- Alarms for ◆
- o Water level for humidifier
- General fault o
- o Blocked tube (water for humidifier)
- Battery charging status o
- Cartridge fault (humidifier cartridge) o
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- o Cartridge type (2 are available for lower flows and higher flow)
- o Supply gas fault
- Encoder knob .
- o For selecting settings
- Run / Standby button .
- Status LED .
- Alarm mute .
# Performance Data:
In all instances, the Precision Flow® - Heliox functioned as intended and the results observed were as expected.
The Precision Flow® - Heliox met the following standards with exceptions:
| # | Document Number | Title |
|---|----------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 | ISO 62304 | Medical Device Software - Software Life Cycle Process |
| 2 | ISO 8185:2007 | Respiratory tract humidifiers for medical use |
| 3 | ISO 10993-5:2009 | Biological evaluation of medical devices - Part 5: Tests<br>for in vitro cytotoxicity |
| 4 | ISO 10993-10:2010 | Tests for Irritation and Sensitization |
| 5 | ISO 11195:1995 | Gas mixers for medical use - Stand-alone gas mixers |
| 6 | ISO 14971:2007 | Medical devices - Application of risk management to<br>medical devices |
| 7 | ANSI/AAMI/ISO 15223-<br>1:2007/A1:2008 | Medical Devices - Symbols to be used with Medical<br>Device Labels, Labeling and information to be supplied<br>- Part 1: General Requirements |
| 8 | ANSI/AAMI ES60601-1:2005 | Medical electrical equipment – Part 1: General<br>requirements for basic safety and essential<br>performance |
| 9 | ANSI/AAMI/IEC 60601-1-<br>2:2007 3rd edition | Medical Electrical Equipment - Part 1-2: General<br>requirements for basic safety and essential<br>performance - Collateral standard: Electromagnetic<br>Compatibility - Requirements and tests<br>General Requirements for Safety with exceptions:<br>Section 5:<br>Device can not produce hazardous<br>radiation<br>Section 6:<br>Anesthetic mixtures not applicable |
| 9 | ANSI/AAMI/IEC 60601-1-<br>2:2007 3rd edition | Medical Electrical Equipment - Part 1-2: General<br>requirements for basic safety and essential<br>performance - Collateral standard: Electromagnetic<br>Compatibility - Requirements and tests<br>General Requirements for Safety with exceptions:<br>Section 5:<br>Device can not produce hazardous<br>radiation<br>Section 6:<br>Anesthetic mixtures not applicable |
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| # | Document Number | Title |
|----|---------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 10 | EN60601-1-4:1999 | Medical Electrical Equipment: Part 1: General<br>Requirements for Safety 4. Collateral Standard:<br>Programmable Electrical Medical Systems |
| 11 | IEC 60601-1-8 2006-10 | General requirements, tests and guidance for alarm<br>systems in medical electrical equipment and medical<br>electrical systems |
| 12 | IEC 60529 IPX1 | Drip Proof |
| 13 | AAMI TIR 32:2004 | Software Risk Management |
| 14 | AAMI TIR 36:2007 | Validation of Software |
| 15 | ISTA -1A:2001 | Procedure 1A: Packaged-Products weighing 150 LB<br>(68 KG) or Less |
| 16 | EPA/625/R-96/010b (VOC)<br>Method TO-15<br>(1999) | Compendium Method TO-15 Determination of Volatile<br>Organic Compounds (VOCs) in Air collected in<br>specially-Prepared canisters and analyzed by<br>chromatography/mass spectrometry (GC/MS) |
| 17 | NIOSH Method 0500<br>(1994) | NIOSH manual of Analytical methods (NMNM) fourth<br>edition August 1994 (Particulate Matter Testing) |
## Design Verification Plan:
Listing of all Required Tests
- Functional Performance Test .
- Alarms & Fault Conditions Test ●
- Patient Connector Attachment Test .
- Water Connector Attachment Test .
- Extended Life Test .
- Membrane Switch and Adjustment Dial Test .
- Software Verification Test ●
- Fluid & Gas Pathways Leak Test .
- ... .. .. . . . . . . . Cartridge Insertion Test . . . . . . . Comments of the country of the status
- . Door Test
- IPX Test .
- Environmental Temperature/Humidity Extremes Test .
## Substantial Equivalence
The Precision Flow® - Heliox is as safe and effective as the predicate and the Precision Medical Heliox/Oxygen Blender (K090781).
A comparison of the devices is as follows:
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| # | Manufacturer | Precision Medical, Inc.<br>Heliox/Oxygen Blender;<br>K090781 | Vapotherm, Inc. Precision<br>Flow® - Oxygen/Heliox,<br>K111640 | Comments |
|----|--------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------|
| 1 | Indications for<br>Use | The Precision Medical, Inc. Heliox<br>Blender Oxygen System is<br>intended to deliver blended<br>Helium and oxygen in a hospital<br>setting. Oxygen concentrations<br>can be dialed from 20% to 100%<br>for heliox tank mixtures of 20%<br>oxygen/ 80% helium, and 30% to<br>100% for heliox tank mixtures of<br>30% oxygen/ 70% helium. The<br>Blender is not intended as a life<br>supporting device. | The Precision Flow® - Heliox<br>is intended to warm and add<br>moisture to breathing gases<br>from an external source for<br>administration to<br>neonate/infant, pediatric and<br>adult patients in the hospital<br>and sub-acute institutions. It<br>adds heat and moisture to a<br>blended medical heliox (79%<br>helium, 21% oxygen)/oxygen<br>mixture and assures the<br>integrity of the precise heliox<br>(79% helium, 21%<br>oxygen)/oxygen mixture via<br>an integral oxygen analyzer.<br>The flow rates may be from 1<br>to 40 liters per minute via<br>nasal cannula. | Equivalent |
| 2 | Patient<br>population | Infant, pediatric, and adult<br>patients. | Neonate/infant, pediatric and<br>adult patients | Equivalent |
| 3 | Technology | Mechanical | Electronic/Mechanical | Equivalent |
| 4 | Gases Mixed | Heliox & Oxygen | Heliox & Oxygen | Equivalent |
| 5 | Heliox/Oxygen<br>Mixtures | 79% Heliox, 21% Oxygen | 79% Heliox, 21% Oxygen | Equivalent |
| 6 | Oxygen %<br>Range | 21 to 100% | 21 to 100% | Equivalent |
| 7 | Oxygen<br>Concentration<br>Monitor | Requires an external oxygen<br>analyzer with alarm. Accuracy<br>requires a gas bleed operation at<br>flow settings below 15 lpm for<br>High Flow and 3 lpm for Low Flow | Internal oxygen analyzer<br>independent of blender<br>function | Equivalent<br>PF-H<br>eliminates<br>user error at<br>set up |
| 8 | Oxygen<br>Concentration<br>Range | 21 to 100% | 21 to 100% | Equivalent |
| 9 | Correct Heliox<br>Flow Rates | Manual Oxygen Flowmeter<br>Conversion Chart Needed | Automatically | Equivalent<br>PF-H has<br>less<br>opportunity<br>for error |
| 10 | Supply<br>Pressure<br>Range | 30 to 75 psi Heliox + Oxygen<br>must be within 10 psi of each<br>other | 4 to 70 psi, Device unaffected<br>by input gas pressure<br>differences, Heliox medical<br>grade & certified gas cylinder | Equivalent |
| # | Manufacturer | Precision Medical, Inc.<br>Heliox/Oxygen Blender,<br>K090781 | Vapotherm, Inc. Precision<br>Flow® - Oxygen/Heliox,<br>K111640 | Comments |
| 11 | Operating<br>Temperature | 15° to 40°C | 33° to 43° C | Equivalent |
| 12 | Environment of<br>use | Institutional environments | Hospital and sub-acute<br>institutions | Equivalent |
| 13 | Condition Gas:<br>Warm &<br>Humidify | Need to add auxiliary equipment | Integrated into device | Equivalent<br>PF-H<br>eliminates<br>user error in<br>assembly |
| 14 | FiO2 Accuracy | +/- 3% of full scale @ 50 psi | 2 to 40 lpm: +/-2%<br>1 to 2 lpm: +/-5% | Equivalent |
| 15 | Alarms | Alarms for Gas Bypass &<br>Oxygen/Heliox Supply Gas<br>Connected | Alarms for General Fault<br>(internal component failure),<br>Blocked Delivery Tube, Water<br>Out, Disposable Water Path<br>function, Battery Charging<br>(AC disconnected), Vapor<br>Transfer Cartridge type &<br>fault, Gas Supply, Gas<br>Temperature | Equivalent<br>PF-H<br>provides<br>alarms for<br>multiple<br>alarm<br>conditions |
| 16 | Alarm Sound<br>Level | >/= to 80 db at 1 ft. | Medium Priority 47 db @ 1 m<br>Low Priority 45 db @ 1 m | Equivalent |
| 17 | Primary Outlet<br>Flow Range | High Flow 15 to 120 lpm<br>Low Flow 3 to 30 lpm<br>(With both supply pressures at 50<br>psi with Bleed Closed*) | 1 to 40 lpm | Equivalent |
| 18 | Auxiliary Outlet<br>Flow Range | High Flow 2 to 100 Ipm<br>Low Flow 3 to 30 Ipm<br>(With both supply pressures at 50<br>psi with Bleed Open) | Auxiliary outlet not needed | Equivalent |
| 19 | Inlet Fitting | DISS or NIST | DISS or NIST | Equivalent |
| 20 | Bleed Flow<br>@50 psi | 3 Ipm or less | Not required for PF-H<br>functionality | Equivalent<br>PH-H easier<br>to use, no<br>bleed off<br>required to<br>operate |
| 21 | No. of Primary<br>Outlet Ports | 1 | 1 | Equivalent |
| 22 | No. of Auxiliary<br>Outlet Ports | 1 | 0 | PF-H for<br>single patient<br>use |
| # | Item | Vapotherm, Inc. Precision<br>Flow® - Oxygen/Air, K072845 | Vapotherm, Inc. Precision<br>Flow® - Oxygen/Heliox,<br>K111640 | Comments |
| 1 | Indications for<br>Use | Precision Flow® is intended for<br>use to add warm moisture to<br>breathing gases from an external<br>source for administration to a<br>neonate/infant, pediatric and<br>adult patients in the hospital,<br>sub-acute institutions, and home<br>settings. It adds heat and<br>moisture to a blended medical<br>air/oxygen mixture and assures<br>the integrity of the precise<br>air/oxygen mixture via an integral<br>oxygen analyzer. | The Precision Flow® - Heliox is<br>intended to warm and add<br>moisture to breathing gases<br>from an external source for<br>administration to<br>neonate/infant, pediatric and<br>adult patients in the hospital<br>and sub-acute institutions. It<br>adds heat and moisture to a<br>blended medical heliox (79%<br>helium, 21% oxygen)/oxygen<br>mixture and assures the<br>integrity of the precise heliox<br>(79% helium, 21%<br>oxygen)/oxygen mixture via an<br>integral oxygen analyzer. The<br>flow rates may be from 1 to 40<br>liters per minute via nasal<br>cannula. | Equivalent |
| 2 | Patient<br>population | Neonate/infant, pediatric, and<br>adult patients. | Neonate/infant, pediatric and<br>adult patients | Equivalent |
| 3 | Technology | Electronic/Mechanical | Electronic/Mechanical | Equivalent |
| 4 | Oxygen %<br>Range | 21 to 100% | 21 to 100% | Equivalent |
| 5 | Oxygen<br>Concentration<br>Monitor | Internal oxygen analyzer | Internal oxygen analyzer | Equivalent |
{6}------------------------------------------------
* The Precision Medical, Inc. Heliox/Oxygen Blender needs a minimum input flow rate of 30 psi to operate. In order to delivery a lower flow rate to the patient, the excess gas is vented to atmosphere (bleed).
A comparison of the Precision Flow® - Oxygen/Heliox to the Precision Flow® - Oxygen/Air is as follows:
{7}------------------------------------------------
| 6 | Oxygen<br>Concentration<br>Range | 21 to 100% | 21 to 100% | Equivalent | |
|----|--------------------------------------|----------------------------------------|---------------------------------------------------------------|------------|------------|
| 7 | Supply<br>Pressure<br>Range | 4 to 70 psi, Air/Oxygen | 4 to 70 psi, Heliox medical<br>grade & certified gas cylinder | Equivalent | |
| 8 | Operating<br>Temperature | 33° to 43° C | 33° to 43° C | Equivalent | |
| 9 | Environment of<br>use | Hospital and sub-acute<br>institutions | Hospital and sub-acute<br>institutions | Equivalent | |
| 10 | Condition Gas:<br>Warm &<br>Humidify | Integrated into device | Integrated into device | Equivalent | |
| 11 | FiO2 Accuracy | 1 to 40 lpm: +/- 2 % | 2 to 40 lpm: +/- 2%<br>to 2 lpm: +/- 5% | 1 | Equivalent |
| 12 | Max Flow<br>Range | 40 Ipm | 40 Ipm | Equivalent | |
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| # | Item | Vapotherm, Inc. Precision<br>Flow® - Oxygen/Air, K053232 | Vapotherm, Inc. Precision<br>Flow® - Oxygen/Heliox;<br>K111640 | Comments |
|----|----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------|
| 13 | Alarms | Alarms for General Fault (internal<br>component failure), Blocked<br>Delivery Tube, Water Out,<br>Disposable Water Path function,<br>Battery Charging (AC<br>disconnected), Vapor Transfer<br>Cartridge type & fault, Gas<br>Supply, Gas Temperature | Alarms for General Fault<br>(internal component failure),<br>Blocked Delivery Tube, Water<br>Out, Disposable Water Path<br>function, Battery Charging (AC<br>disconnected), Vapor Transfer<br>Cartridge type & fault, Gas<br>Supply, Gas Temperature | Equivalent |
| 14 | Alarm Sound<br>Level | Medium Priority 47 db @ 1 m<br>Low Priority 45 db @ 1 m. | Medium Priority 47 db @ 1 m<br>Low Priority 45 db @ 1 m. | Equivalent |
| 15 | Inlet Fitting | DISS or NIST | DISS or NIST | Equivalent |
The Precision Flow® - Heliox has the same intended uses and similar indications, technological characteristics, and principles of operation as the Precision Medical, Inc. Heliox/Oxygen Blender (K090781). The conversion of the mass flow meter from air to Heliox and the minor change for the percentage oxygen range raises no new issues of safety or effectiveness. Performance data of the blending of Heliox and oxygen demonstrate that the Precision Flow® - Heliox is as safe and effective. Thus, the Precision Flow® - Heliox is substantially equivalent.
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Image /page/9/Picture/1 description: The image shows the logo for the Department of Health & Human Services USA. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" around the perimeter. Inside the circle is a stylized symbol that resembles a human figure with three wavy lines representing the head, body, and legs. The symbol is black, and the background is white.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002
Mr. Gregory A. Whitney Vice President Regulatory Affairs Vapotherm, Incorporated 198 Log Canoe Circle Stevensville, Maryland 21666
OCT - 7 2011
Re: K111640
Trade/Device Name: Vapotherm Precision Flow®, Heliox Regulation Number: 21 CFR 868.5450 Regulation Name: Respiratory Gas Humidifier Regulatory Class: II Product Code: BTT Dated: September 26, 2011 Received: September 29, 2011
Dear Mr. Whitney:
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, Novever, 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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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 regencies. 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/ResourcesforYou/Industry/dsfault.htm.
Sincerely yours,
Th 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
#### Enclosure
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| Premarket Indication for Use Statement | |
|----------------------------------------|--|
|----------------------------------------|--|
510(k) Number (if known): K ( 1 | 6 4 O
Vapotherm Precision Flow®, Heliox Device Name:
Indications for Use:
The Precision Flow® - Heliox is intended to warm and add moisture to breathing gases from an external source for administration to neonate/infant, pediatric and adult patients in the hospital and sub-acute institutions. It adds heat and moisture to a blended medical heliox (79% helium. 21% oxygen)/oxygen mixture and assures the integrity of the precise heliox (79% helium, 21% oxygen)/oxygen mixture via an integral oxygen analyzer. The flow rates may be from 1 to 40 liters per minute via nasal cannula.
Prescription Use X _ AND/OR (Part 21 CFR 801 Subpart D)
Over-The counter Use (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)
P. Schulin
(Division Sign-Off) Division of Anesthesiology, General Hospital Infection Control, Dental Devices
510(k) Number: 4-111640 Page __ of __
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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.