BiLevel-S therapy for OSA with high pressure requirements and CPAP intolerance.

The prisma25S-C therapy device from Löwenstein Medical is a classic BiLevel-S device that offers all the advantages of the prismaLINE. The device is equipped with a high-quality blower, which allows performance in a pressure range of up to 25 hPa, and a three-stage adjustable trigger. The device can be optionally combined with prismaAQUA and heated circuit.

made in germany loewenstein

The advantages of the prisma25S-C.

Designed specifically for therapies requiring high pressure and CPAP intolerance, the prisma25S-C offers a range of features and modes for maximum patient comfort and safety during therapy.

In addition to the familiar BiLevel mode and adaptive EPAP, the prisma25S-C offers additional setting options, such as Bi soft1, Bi soft2, autoPDIFF and (auto)TriLevel. These provide additional breathing comfort during therapy.

The combination of a large LED touch screen and intelligent menu navigation allows for an intuitive and thus quick operation. Patients and specialist user can quickly navigate through the menu of the prisma25S-C. This makes the device an ideal everyday support for various workflows in daily practice.

The optional humidifier prismaAQUA can also be operated with a heated circuit. When using the prismaAQUA humidifier, smartAQUAcontrol can be optionally activated: for a quick sensation of warmth in the airflow at the start of therapy and to ensure humidifier performance in periods of increased leakage.

Product features

Modern connectivity

Compatible and future-proof. Various interfaces such as SD, PSG, LAN and external modem offer various options for data transfer. Our software solutions (e.g. prismaTS, prisma APP and prisma CLOUD) are available for simple, flexible and secure therapy support.

Fall asleep comfortably - softSTART

The softSTART function can be activated to help you fall asleep and slowly acclimate to therapy pressure during the sleep phase. This ensures a slow increase in pressure over a set period until therapy pressure is reached. This is particularly useful for patients who find high pressure uncomfortable while awake and cannot fall asleep.


prismaAQUA is the powerful respiratory air humidifier for the world of sleep apnea therapy devices. It humidifies and warms the breathing air to prevent the patient's mucous membranes from drying out.

Pressure relief softPAP

For comfortable expiration during therapy, the pressure in CPAP and autoCPAP mode is reduced at the start of expiration and increased to therapy pressure in time for the start of the inhalation phase to facilitate exhalation as much as possible and effectively prevent events.

Pressure reaction fits patient’s needs

Patients react with varying sensitivity to pressure adjustments. For effective therapy and breathing comfort, two options for pressure adjustments are available in APAP mode. In addition, a pressure increases at closed central events is avoided.

Deep sleep and respiratory stability indicators

During therapy, prisma RECOVER continuously analyzes the patient’s breathing pattern and recognizes the phases of stable respiration that indicate deep sleep, a particularly restorative sleep phase. In BiLevel modes too the phases of highly stable respiration are detected and reported. For the first time ever, this function can assess therapy success regarding to sleep quality in prisma JOURNAL, prismaTS or tele-monitoring with prisma CLOUD.


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