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The TAGA Velocity Passover Humidifier with Velocity Humidifier Heater TM1000H is a respiratory positive airway pressure accessory intended to add moisture to the air stream gases for administration to the patient. The humidifier can be used with standard CPAP and or Bi-level Positive Airway Pressure (BiPAP) devices, which have a maximum operating pressure of 20 cm H20, and do not have automatic pressure titration capabilities.

The following is a summary of the Velocity Passover Humidifier component for the new Velocity Humidifier Heater TM1000H device. The non-sterile Velocity Passover Humidifier is a plastic housing comprised of two (2) halves, a top and bottom, assembled together to form an enclosed reservoir. An O-ring forms a seal between the two halves when assembled, with a plurality of slide latches maintaining the proper position and seal tensions between the two housing components. The reservoir has two ports, an inlet and an outlet, on the upper portion, both being 22 mm conical connectors, which allow for the connection of commonly used respiratory Continuous Positive Airway Pressure (CPAP) or Bi-level Positive Airway Pressure (BiPAP) flexible tubing. The inlet and outlet port are clearly identified on the device. The inlet port is typically attached to the pressure generating CPAP or BiPAP unit by means of a short piece (12" to 24") of tubing that is supplied with the humidifier. The air entering the humidifier is directed over the surface of the water in the basin through a series of baffles. The design intent of the baffles shape and placement is to create turbulence in the airflow over the water surface. The baffles also create an eddy effect, which in turn increase the duration that the air is exposed and travels across the surface of the water. The combination of both of these effects maximizes the evaporation process thereby elevating the humidity level of the gas before exiting the device. The air exits the device through the outlet port into a second piece of tubing supplied by the user that is connected the patients' mask. The volume of water is sufficient to provide 10 hours minimum use at 70 °F and 25% RH ambient conditions and a patient flow rate of 90 LPM. The humidifier is filled only when removed from the CPAP or BiPAP systems. The Passover Humidifier is used in a horizontal position and will act as a base for most marketed CPAP or BiPAP systems This feature ensures that the water level is below the outlet port on the CPAP or BiPAP systems to eliminate the potential hazard of water reaching any CPAP or BiPAP electrical components. The following is a description for the new Velocity Humidifier Heater TM1000H component of the device. The Velocity Humidifier Heater TM1000H consists of a plastic housing with an On/Off switch, control knob, heater plate assembly and two indicator LEDs. The Velocity passover humidifier rests on the heater plate assembly. The heater plate assembly operates at a scale of low (88°F (31°C)) to high (140°F (60°C)) as selected by the user by adjusting the control knob. The Velocity humidifier heater contains a built-in safety device to prevent the heater plate from reaching excessive temperatures under fault conditions. If the heater plate temperature exceeds approximately 90° C (194° F) power to the unit is terminated. The device has an electrical rating of 110 volts 60Hz, 110 Watts. The device works by heating a metal plate that the plastic humidifier rests on. This in turn warms the water within the humidifier. As the air flows over the water, it picks up some of the moisture. As a result, the gas exiting the humidifier is warmed and humidified providing a continuous humid air stream gas to the patients that require continuous humid positive airway pressure. The system controls the temperature of the heater plate assembly only and not the water or gas temperature.

The provided text describes the K040507 510(k) summary for the TAGA Velocity Humidifier Heater TM1000H. However, it does not contain specific details about a clinical study that includes acceptance criteria, sample sizes, ground truth establishment, or expert involvement as requested.

The document primarily focuses on the device description, intended use, technological characteristics, and conformity to voluntary standards for safety and electromagnetic compatibility. It also mentions a comparison to a predicate device in terms of relative humidity gain.

Therefore, for most of your questions, the answer is that the information is not provided in the given text.

Here's a breakdown of what can be extracted and what is missing:

1. A table of acceptance criteria and the reported device performance:

2. Sample size used for the test set and the data provenance (e.g., country of origin of the data, retrospective or prospective):

• Not provided. The document does not describe a test set or its sample size.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts:

• Not provided. No information about experts or ground truth for a test set is included.

4. Adjudication method (e.g., 2+1, 3+1, none) for the test set:

• Not provided. There is no mention of a test set or adjudication method.

5. If a multi reader multi case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance:

• Not applicable. This device is a respiratory gas humidifier, not an AI-assisted diagnostic or imaging device. Therefore, a MRMC comparative effectiveness study with human readers and AI assistance is not relevant or described.

6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done:

• Not applicable. This device is a physical medical device (humidifier), not an algorithm.

7. The type of ground truth used (expert consensus, pathology, outcomes data, etc.):

• Not provided. The "ground truth" for this type of device would typically involve engineering specifications, performance testing against physical standards (e.g., humidity output, temperature regulation, electrical safety), and comparison to predicate device performance. The document states "The Velocity Humidifier Heater TM1000H relative humidity gain matched or exceeded the Devilbiss relative humidity gain at all flows and temperature settings," implying direct measurement against a predicate device.

8. The sample size for the training set:

• Not applicable/Not provided. This is a hardware device, not a machine learning model, so there is no training set in the typical sense.

9. How the ground truth for the training set was established:

• Not applicable/Not provided. As above, no training set for a machine learning model is involved.

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