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What is a BiPAP ST Ventilator? Complete Guide (2026)
If your doctor has prescribed a BiPAP ST ventilator, you may be wondering what it is, how it works, and how it differs from a regular CPAP or BiPAP machine. This complete guide answers all your questions in simple language.
At Srivari Healthcare, Chennai, we supply the Prisma 30ST BiPAP-ST ventilator — one of India’s most trusted NIV machines for home use. Call +91 99410 64349 for pricing and availability.
What is a BiPAP ST Ventilator?
A BiPAP ST ventilator is a non-invasive breathing support machine that delivers two different air pressures — one for inhalation (IPAP) and one for exhalation (EPAP). The ST stands for Spontaneous/Timed mode.
The key feature of ST mode is a timed backup respiratory rate. If the patient does not take a breath within a set time, the Prisma 30ST automatically delivers a breath. This backup rate is what separates a BiPAP-ST ventilator from a standard BiPAP machine.
| Feature | Prisma 30ST BiPAP-ST ⭐ | Standard BiPAP (S) | CPAP |
| Pressure Type | Two pressures IPAP + EPAP | Two pressures IPAP + EPAP | Single fixed pressure |
| Backup Rate | ✅ Yes — timed | ❌ No | ❌ No |
| Best For | COPD, central apnea, NIV | Mild respiratory support | Obstructive sleep apnea |
| Max IPAP | 30 cmH₂O | 25 cmH₂O | 20 cmH₂O |
How Does BiPAP ST Mode Work?
The Prisma 30ST BiPAP ST ventilator works in two ways simultaneously:
Spontaneous (S) mode — The machine detects when the patient starts to breathe and delivers pressurised air to support that breath.
Timed (T) mode — If the patient does not breathe within a set number of seconds, the Prisma 30ST automatically triggers a breath at the backup rate set by the doctor.
Who Needs a BiPAP ST Ventilator?
- COPD with hypercapnia — high CO₂ levels due to inadequate breathing
- Central sleep apnea — where the brain fails to signal the breathing muscles
- Obesity Hypoventilation Syndrome (OHS)
- Neuromuscular diseases — ALS, muscular dystrophy, post-polio syndrome
- Respiratory failure — acute or chronic, after ICU discharge
- Mixed sleep apnea — combination of obstructive and central events
Prisma 30ST — Best BiPAP ST Ventilator for Home Use in India
The Prisma 30ST by Löwenstein Medical Germany is the most recommended BiPAP ST ventilator by pulmonologists in India for home NIV therapy.
- IPAP up to 30 cmH₂O — highest in its class
- Backup rate: 2 to 30 breaths per minute
- Colour touchscreen display
- Auto leak compensation algorithm
- USB and SD card data logging for doctor review
- Compatible with PrismaAQUA heated humidifier
- CE and ISO 13485 certified — genuine clinical grade device
- Quiet under 26 dB(A) — designed for overnight home use