TREND 500 provides as a BILEVEL ST all the advantages of the approved HOFFRICHTER-technology with a high pressure range and extreme power reserves at a very low noise level.
TREND 500 is a therapeutic unit with two pressure levels in the S, ST or T modes designed for the respiration therapy of adults. A rapid change in the high-performance fan speed allows the unit to be switched from one pressure level to another. For pressure generation TREND 500 has an electronically controlled turbine. In order to keep the patient's burdening as low as possible the turbine has been equipped with sufficient power reserves as well as a fast control circuit.
The technology allows controlled pressure transitions from one level to another in practically any lapse of time. Thus it has been possible not only to eliminate the noisy servo valves but also to achieve an extremely high constancy of pressure.
The respiratory trigger recognises the patients efforts to breathe in and out and transmits them to a control mechanism. The TREND 500 is equipped with a pressure-controlled trigger. However the regulating mechanism on the unit prevents pressure fluctuations in the mask. To enable the trigger to function the pressure corrections made by the fan at its outlet are recorded to maintain a stable pressure in the mask. The patients respiratory work doesn´t change the mask pressure anymore.
The trigger mechanism of the TREND 500 has its own microcontroller to optimise the release of the trigger by dynamic adjustment of the release criteria to various sleeping phases.
In conjunction with optimal flank adjustment the patient experiences a pleasant ventilation which gives him or her the impression that the unit pursues the natural breathing mechanisms without any inertia.