Who is the manufacturer of Vlab?

Dormotech Medical, Ltd. filed the 510(k) submission for Vlab (K230148).

What is the FDA product code for Vlab?

GWL. It is classified under 21 CFR 882.1835 as a Class 2 device in the Neurology panel.

What is the regulatory pathway for Vlab?

510(k) clearance (submission type: Traditional).

Who can help prepare an FDA 510(k) submission like Vlab?

Innolitics — a medical-device software consultancy — provides regulatory and engineering support for FDA 510(k) submissions. See https://innolitics.com/services/510ks/ or contact https://innolitics.com/contact.

Vlab

Q: What are the predicate devices for Vlab?

Respironics, Alice PDx (K090484).

K230148 · Dormotech Medical, Ltd. · GWL · Oct 11, 2023 · Neurology

Device Facts

Record ID	K230148
Device Name	Vlab
Applicant	Dormotech Medical, Ltd.
Product Code	GWL · Neurology
Decision Date	Oct 11, 2023
Decision	SESE
Submission Type	Traditional
Regulation	21 CFR 882.1835
Device Class	Class 2

Intended Use

The DormoTech Vlab is a physiological data recorder intended to collect and record data from multiple physiological channels for use by clinical software used in polysomnography and sleep disorder studies. It is intended for use by or on the order of a physician is intended for use on adults in a supervised (hospital) or unsupervised (home) environment.

Device Story

DormoTech Vlab is a wearable, portable physiological data recorder for polysomnography. Input: electrical signals (EEG, EOG, EMG, ECG), airflow (nasal/oral), snoring, respiratory effort (thoracic/abdominal), and body/head position (accelerometers). Operation: sensors acquire and digitize signals; wearable head and body units transmit data via Bluetooth to a central unit (located within 10m); central unit stores data on internal Flash drive and transmits via Wi-Fi to online servers. Device does not perform signal analysis; data is intended for use by external, FDA-cleared clinical software. Used by physicians or patients (home use) to assist in sleep disorder diagnosis. Benefits: enables remote or supervised sleep study data collection for clinical decision-making.

Clinical Evidence

Prospective, randomized, self-controlled clinical study (n=47) comparing Vlab performance to gold-standard PSG in two sleep labs. Primary endpoint: AHI score/classification. Secondary endpoints: ODI, snore %, sleep stages, sleep efficiency, and position. Results showed good agreement with PSG across all parameters, with mean differences near zero and narrow limits of agreement (e.g., AHI mean difference -0.1927 events/h).

Technological Characteristics

Wearable sensor array; components include head unit (EEG, EOG, EMG, airflow, snoring, accelerometers) and body unit (respiratory effort, accelerometers). Connectivity: Bluetooth (wearable to central unit), Wi-Fi (central unit to server). Data storage: internal Flash drive. Power: battery-operated. Biocompatibility: surface contact/externally communicating, <24 hours. Software: device performs data acquisition/digitization only; analysis performed by external cleared software.

Indications for Use

Indicated for adults 22 years and older for collection and recording of physiological data for polysomnography and sleep disorder studies in supervised (hospital) or unsupervised (home) environments.

Regulatory Classification

Identification

A physiological signal amplifier is a general purpose device used to electrically amplify signals derived from various physiological sources (e.g., the electroencephalogram).

Predicate Devices

Respironics, Alice PDx (K090484)

Reference Devices

NOX, Nox Sleep System (K192469)

Related Devices

K242290 — DormoTech NLab · Dormotech Medical, Ltd. · Jan 8, 2025
K220631 — NomadAir PMU810 · Neurotronics, Inc. · Jul 15, 2022
K240646 — DreamClear · Somnomed Technologies Inc., Doing Business AS Remware · Sep 4, 2024
K203343 — Wesper Lab · Wesper, Inc. · Dec 21, 2021
K223573 — Onera Sleep Test System (Onera STS) · Onera B.V. · Aug 18, 2023

Submission Summary (Full Text)

{0}------------------------------------------------ October 11, 2023 FDA U.S. FOOD & DRUG ADMINISTRATION DormoTech Medical Ltd. % Paul Dryden Consultant ProMedic Consulting, LLC 131 Bay Point Dr. NE Saint Petersburg, Florida 33704 Re: K230148 Trade/Device Name: Vlab Regulation Number: 21 CFR 882.1835 Regulation Name: Physiological Signal Amplifier Regulatory Class: Class II Product Code: GWL, MNR Dated: September 11, 2023 Received: September 11, 2023 Dear Paul Dryden: 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 (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 available 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. {1}------------------------------------------------ Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download). Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30. Design controls; 21 CFR 820.90. Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the QS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181). 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 Part 803) for devices or postmarketing safety reporting (21 CFR Part 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 (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 mediation-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, # Patrick Antkowiak -S for Jay Gupta Assistant Director {2}------------------------------------------------ DHT5A: Division of Neurosurgical, Neurointerventional and Neurodiagnostic Devices OHT5: Office of Neurological and Physical Medicine Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health Enclosure {3}------------------------------------------------ # Indications for Use 510(k) Number (if known) ## K230148 Device Name DormoTech Vlab Indications for Use (Describe) The DormoTech Vlab is a physiological data recorder intended to collect and record data from multiple physiological channels for use by clinical software used in polysomnography and sleep disorder studies. It is intended for use by or on the order of a physician is intended for use on adults in a supervised (hospital) or unsupervised (home) environment. Type of Use (Select one or both, as applicable) 7XX Prescription Use (Part 21 CFR 801 Subpart D) █ Over-The-Counter Use (21 CFR 801 Subpart C) ## CONTINUE ON A SEPARATE PAGE IF NEEDED. This section applies only to requirements of the Paperwork Reduction Act of 1995. # *DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW * The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to: > Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff@fda.hhs.gov "An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number." FORM FDA 3881 (6/20) 443-6740 Page 1 of 1 SC Publishing Services (301) {4}------------------------------------------------ | Date Prepared: | 11-Sep-2023 | |---------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------| | Sponsor: | DormoTech Medical Ltd. Yitzhak Rabin 21 Afula, Israel + 972-4-7799729 | | Sponsor Contact: | Abed Nassir, Head of Firm | | Submission Contact: | Paul Dryden ProMedic, LLC | | Proprietary or Trade Name: Common/Usual Name: Classification Name: Product Code Regulation Number | DormoTech Vlab Physiological Signal Amplifier Physiological Signal Amplifier GWL, MNR 21 CFR 882.1835 | | Predicate Device: Reference Device: | Respironics, Alice PDx, K090484 NOX, Nox Sleep System, K102469 | #### Device Description: The DormoTech Vlab is a physiological data recorder intended to collect and record data from multiple physiological channels for use by clinical software used in polysomnography and sleep disorder studies. #### It consists of: The Head Unit The head unit acquires electric signals indicative of EEG and eye movement located in the upper part of the unit (on the patient's forehead). Head relative position are also measured using accelerometer sensors located in the upper part of the unit. The middle part of the unit is located below the mouth, it contains 2 nasal (one in each nostril) and 1 oral airflow sensors, 1 EMG sensor, along with snoring sensor. #### The Body Unit The body unit is made of 2 belts, the upper belt sits on the chest, and the stomach of the patient. Both belts contain respiratory effort and accelerometer sensors, in addition, the upper belt contains an accelerometer to measure body position. #### The Central Unit Both the head and chest units communicate with the central units via Bluetooth, the wearable units send the measured data to the central unit. The central unit receives the data, it stores it within an internal Flash drive and then transmits the data via Wi-Fi to online servers for further diagnosis. Central unit, located in the test room (up to 10 meters from the patient). No contact with the patient. #### Principle of Operation: The device acquires and digitizes signals from sensors and sends them to a polysomnography system. Sensors are: - Direct measurement of electrical potential at the skin (EEG, EMG, EOG). - Thermistors (flow) - Accelerometers (movement) - Respiratory Effort ● - Snoring Sensor ● {5}------------------------------------------------ #### Indications for Use: The DormoTech Vlab is a physiological data recorder intended to collect and record-data from multiple physiological channels for use by clinical software used in polysomnography and sleep disorder studies. It is intended for use by or on the order of a physician is intended for use on adults in a supervised (hospital) or unsupervised (home) environment. #### Patient Population: Adults, 22 years and older #### Substantial Equivalence: The subject device, DormoTech Vlab, is substantially equivalent to the Respironics Alice PDx cleared under K090484 when compared to a cleared PSG system, the NOX Sleep system, K192496. #### Performance Testing: #### Non-clinical Substantial equivalence to the predicate is based upon performance testing on collecting, recording and transferring data as well as the following. - Biocompatibility - Software Verification and Validation - Electrical Safety - Electromagnetic Compatibility Compliance - . Product Requirements Verification - . Consumables Verification #### Clinical We performed a prospective clinical study compared to a gold standard PSG study. #### Summarizing the clinical study: #### Study design: An IEC approved, comparative, self-controlled, randomized, prospective study designed to assess the Vlab and compare its performance to a gold standard polysomnogram (PSG) conducted over 1 night in a sleep lab. #### Study Locations: Two sleep labs were used: - Shamir Medical Center – Be'er Ya'akov, Israel - . Millenium Sleep Clinic - Be'er Sheva, Israel #### Patient Population: - Adults 22 years and older ● - Male and female . - 47 subjects . The participants were patients who were referred by physicians for a full sleep study at the sleep laboratory. #### Primary Endpoints Measures: - AHI Apnea-Hypopnea Index Score and Classification ● #### Secondary Endpoints Measures: - ODI Oxygen Desaturation as measured by separate SpO2 sensor ● - Snore-Total Snore % ● - Sleep - Total Sleep Time (min), Sleep Efficiency (%), Sleep Stages [Wake, N1, N2, N3, REM] (%), Sleep Latency (min), Wake After Sleep Onset (min), REM Latency (min) - . Position: Supine position, Left, Right, Up [% from TST] {6}------------------------------------------------ ## 510(k) Summary Page 3 of 8 | Parameter | Mean Difference (Lower CI, Upper CI) | Upper Limit of Agreement (Lower CI, Upper CI) | Lower Limit of Agreement (Lower Upper CI) | |-------------------------------------|--------------------------------------------|-----------------------------------------------------|----------------------------------------------------| | AHI (events/h) | -0.1927 (-1.323, 0.9372) | 6.823 (4.866, 8.78) | -7.209 (-9.166, -5.252) | | ODI (events/h) | -0.3244 (-1.108, 0.4597) | 4.544 (3.186, 5.902) | -5.193 (-6.551, -3.835) | | Snore (%) | 1.085 (-0.525, 2.523) | 10.01 (7.524, 12.5) | -7.843 (-10.33, -5.353) | | Sleep Latency (Minutes) | 4.653 (-0.9411, 10.25) | 38.01 (28.32, 47.7) | -28.7 (-38.39, -19.01) | | REM Latency | -15.64 (-25.95, -5.327) | 44.98 (27.12, 62.85) | -76.27 (-94.13, -58.4) | | Wake after Sleep Onset (Minutes) | -4.300 (-10.53, 1.926) | 31.77 (20.98, -42.55) | -40.37 (-51.15, -29.58) | | REM (%) | 0.4816 (-0.801, 1.764) | 8.129 (5.908, 10.35) | -7.166 (-9.388, -4.945) | | N1 (%) | 0.3263 (-1.839, 2.492) | 13.24 (9.488, 16.99) | -12.59 (-16.34, -8.836) | | N2 (%) | -2.484 (-5.084, 0.1152) | 13.02 (8.513, 17.52) | -17.98 (-22.49, -13.48) | | N3 (%) | 1.011 (-0.07236, 2.093) | 7.468 (5.592, 9.343) | -5.447 (-7.322, -3.571) | | Wake (%) | 0.1972 (-1.301, 1.696) | 8.877 (6.282, 11.47) | -8.483 (-11.08, -5.887) | | Total Sleep Time (Minutes) | 0.72222 (-6.869, 8.313) | 44.69 (31.55, 57.84) | -43.25 (-56.4, -30.1) | | Sleep Efficiency (%) | -0.03333 (-1.536, 1.47) | 8.673 (6.07, 11.28) | -8.74 (-11.34, -6.136) | | Position (Up) (%) | 0.01316 (-0.4649, 0.4913) | 2.864 (2.036, 3.692) | -2.838 (-3.666, -2.01) | | Position (Supine) (%) | 0.9974 (-0.3433, 2.338) | 8.991 (6.669, 11.31) | -6.997 (-9.319, -4.675) | | Position (Left) (%) | 0.3579 (-0.9967, 1.712) | 8.435 (6.089, 10.78) | -7.719 (-10.07, -5.373) | | Position (Right) (%) | -0.3974 (-1.61, 0.8149) | 6.831 (4.732, 8.931) | -7.626 (-9.726, -5.526) | ## a d #### Conclusion: The table above provides a comprehensive comparison between two devices across multiple sleep-related parameters. Most parameters show good agreement between the devices, as indicated by the mean difference values close to zero and narrow limits of agreement. This suggests that for many measures, such as AHi, ODI, and Snore, the devices are interchangeable. By considering both the statistical measures and the role of human scoring, this table offers a nuanced understanding of the performance and reliability of the Dormotech Vlab device when compared to the gold-standard PSG. {7}------------------------------------------------ # 510(k) Summary Page 4 of 8 ## Table 1 – Comparison of Predicate | Features | Subject Device | Predicate | Comments | |------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | | DormoTech Vlab | Alice PDx - K090484 | | | Classification | GWL, MNR Physiological Signal Amplifier 882.1835 | GWL, MNR, DQA Physiological Signal Amplifier 882.1835 | | | Indications for use | The DormoTech Vlab is a physiological data recorder intended to collect and record-data from multiple physiological channels for use by clinical software used in polysomnography and sleep disorder studies. It is intended for use by or on the order of a physician. It is intended for use on adults in a supervised (hospital) or unsupervised (home) environment. | The Alice PDx is a physiological data recorder intended to collect and record data from multiple physiological channels for use by clinical software used in polysomnography and sleep disorder studies. It is intended for use by or on the order of a physician. It is intended for use on adults in a supervised (hospital) or unsupervised (home) environment. | Similar | | Population | Adults | Adults | Similar | | Environment of Use | Supervised (hospital) or unsupervised (home) environment | Supervised (hospital) or unsupervised (home) environment | Similar | | Principle of Operation | Uses sensors to collect signals to be processed by cleared analysis software | Uses sensors to collect signals to be processed by cleared analysis software | Similar | | Physiological signals collected | EEG, EOG, EMG, ECG Airflow Snore Thoracic and Abdominal Effort Body Position Requires separate SpO2 sensor and Heart (pulse) Rate from PPG | EEG, EOG, EMG, ECG Airflow Snore Thoracic and Abdominal Effort Body Position Requires separate SpO2 sensor and Heart (pulse) Rate from PPG | Similar | | Device is | Wearable and portable | Wearable and portable | Similar | | Prescriptive | Yes | Yes | Similar | | Non-clinical Testing | Respiratory Signals | | Bench testing was performed against the reference which confirmed the signal output. Then all measured parameters were compared in clinical study to NOX Sleep System - K192469 | | | Total Airflow | | | | | Snore | | | | | Respiratory Effort (Thoracic & Abdominal) | | | | Features | Subject Device | Predicate | Comments | | | DormoTech Vlab | Alice PDx - K090484 | | | | EXG Signals | | | | | EEG | | | | | EOG | | | | | EMG | | | | | Position Signals | | | | | Body Position | | | | | Head Position | | | | | From recommended Nonin SpO2 sensor | From recommended Nonin SpO2 sensor | | | Biocompatibility | Surface contact and Externally communicataing Limited duration < 24 hours | Surface contact and Externally communicataing Limited duration < 24 hours | Similar | {8}------------------------------------------------ K230148 # 510(k) Summary Page 5 of 8 {9}------------------------------------------------ # 510(k) Summary Page 6 of 8 | Features | Subject Device DormoTech Vlab | Reference Nox Sleep System – K192469 | Comments | |------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------| | Classification | GWL, MNR Physiological Signal Amplifier 882.1835 | OLZ, KZM Electroencephalograph 882.1400 | This system includes more hardware than just sensors collecting data. It is considered a gold standard for comparative clinical studies. | | Indications for use | The DormoTech Vlab is a physiological data recorder intended to collect and record data from multiple physiological channels, for use by clinical software used in polysomnography and sleep disorder studies. It is intended for use by or on the order of a physician is intended for use on adults in a supervised (hospital) or unsupervised (home) environment. | The Nox Sleep System is used as an aid in the diagnosis of different sleep disorders and for the assessment of sleep. The Nox Sleep System is used to measure, record, display, organize, analyze, summarize, and retrieve physiological parameters during sleep and wake. The Nox Sleep System allows the user to decide on the complexity of the study by varying the number and types of physiological signals measured. The Nox Sleep System allows for generation of user/pre- defined reports based on subject's data. The user of the Nox Sleep System are medical professionals who have received training in the areas of hospital/clinical procedures, physiological monitoring of human subjects, or sleep disorder investigation. The intended environments are hospitals, institutions, sleep centers, sleep clinics, or other test environments, including patient's home. | The intended use of collecting data and the population and use environments are similar. The subject device does not analyze the signals. | | Population | Adults, 22 years and older | Adults | Similar | | Environment of Use | Supervised (hospital) or unsupervised (home) environment | Hospital) and home | Similar | | Principle of Operation | Uses sensors to collect signals to be processed by cleared analysis software | Uses sensors to collect signals to be processed by cleared analysis software | Similar | {10}------------------------------------------------ # 510(k) Summary Page 7 of 8 | Features | Subject Device DormoTech Vlab | Reference Nox Sleep System – K192469 | Comments | |------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------| | Physiological signals collected | EEG, EOG, EMG, ECG Airflow Snore Thoracic and Abdominal Effort Body Position Pulse Rate (PPG) with a separate SpO2 sensor | EEG, EOG, EMG, ECG Airflow/Pressure Snore Thoracic and Abdominal Effort Body Position Pulse Rate (PPG) with a separate SpO2 sensor | The subject device includes sensors which are attached and the data collected and analyzed as part of a PSG sleep study. | | Device is | Wearable and portable | Wearable and portable | Similar, yes the sensors for the reference are also wearable and portable. | | Prescriptive | Yes | Yes | Similar | | Performance Testing | Respiratory Signals Total Airflow Snore Respiratory Effort (Thoracic & Abdominal) EXG Signals EEG EOG EMG Position Signals Body Position Head Position Plethysmography signal From recommended Nonin SpO2 sensor | Respiratory Signals Total Airflow Snore Respiratory Effort (Thoracic & Abdominal) EXG Signals EEG EOG EMG Position Signals Body Position Head Position Plethysmography signal From recommended Nonin SpO2 sensor | In a comparative clinical study the results demonstrated that the Vlab was substantially equivalent in measuring the specified parameters. | {11}------------------------------------------------ #### Discussion of Differences: The subject and predicate device are sensor arrays for use in collecting and transmitting data from sleep studies that is analyzed by automated, FDA-cleared software, which is not part of this submission. The reference, NOX Sleep system. K192469, is a complete system that includes the sensors and software to analyze the collected data. It includes additional sensors and measured parameters which the subject device does not include, however, what is measured is similar to the predicate device. We chose the reference as we needed to demonstrate that the signal acquisition quality for all parameters were substantially equivalent and in order to do that we had to process the collected signals through FDAcleared analytic software for comparison. The design of the sensor array is similar to both the predicate and reference as they are placed on the head and thoracic. The technology of the sensors is similar to both the predicate and reference. The differences do not raise different concerns or risk for safety or effectiveness when compared to both the predicate and reference. #### Substantial Equivalence Discussion: As presented in the tables above, the subject device is substantially equivalent to the predicate and the reference devices for indications for use, technological characteristics, environments of use, population and performance. #### Conclusion: The comparison of features, non-clinical and clinical testing support substantial equivalence to the predicate, Respironics Alice PDx, K090484.