BiPAP vs CPAP: Differences and When to Use Each in Costa Rica

Both CPAP and BiPAP are positive-pressure devices used to treat sleep-related breathing disorders and lung disease. They look similar but are clinically different devices and are not interchangeable. This guide explains the differences and when each one is indicated.

CPAP: continuous pressure

CPAP stands for Continuous Positive Airway Pressure. It delivers a single, constant level of pressure throughout the respiratory cycle, keeping the airway open and preventing the typical collapse of obstructive sleep apnea.

When it is prescribed:

• Mild to moderate obstructive sleep apnea (most cases).
• Patients with apnea-hypopnea index (AHI) between 5 and 30/h.
• When the sleep study shows a single pressure solves the events.

Pros: simpler device, lighter masks, lower cost. Cons: some patients find "exhaling against pressure" uncomfortable.

BiPAP: two pressure levels

BiPAP (also written BPAP or VPAP) stands for Bilevel Positive Airway Pressure. It delivers two distinct levels of pressure:

• IPAP (Inspiratory Positive Airway Pressure): higher pressure during inhalation.
• EPAP (Expiratory Positive Airway Pressure): lower pressure during exhalation.

This makes breathing easier because the patient exhales against lower pressure.

When it is prescribed:

• Severe sleep apnea unresponsive to CPAP.
• Obesity hypoventilation.
• COPD with hypercapnia.
• Chronic respiratory failure (neuromuscular diseases).
• Patients needing very high pressures (where CPAP is uncomfortable).

Pros: better tolerance, real ventilatory support, ideal for high pressures. Cons: more expensive, more sophisticated devices, masks can be more complex.

Quick comparison

| Aspect | CPAP | BiPAP | |---|---|---| | Pressure levels | One (continuous) | Two (IPAP / EPAP) | | Main use | Obstructive apnea | Severe apnea, COPD, neuromuscular | | Exhalation comfort | Lower | Higher | | Rental price/month | from ₡60,000 | from ₡120,000 | | New device cost | ₡400,000 - ₡800,000 | ₡800,000 - ₡1,800,000 | | Prescription required | Yes | Yes |

Do I need a titration first?

Yes. Both CPAP and BiPAP require a titration, either with overnight polysomnography in a lab or with an auto-titrating device. The titration sets the correct pressure. Without that data the therapy may be ineffective or uncomfortable.

Masks: nasal, pillows, or full face

• Nasal: covers only the nose. Most popular and comfortable.
• Nasal pillows: very lightweight, ideal for claustrophobic patients.
• Oronasal / full-face: covers nose and mouth. Required for mouth-breathers or high pressures.

Mask choice is as important as the device. A poorly fitted mask cancels the therapy. At Hospital Express we include mask trial and personalized fitting with every rental.

Buy or rent?

Buy if:

• Use will be permanent (chronic sleep apnea).
• The patient is already adapted and tolerates the device well.

Rent if:

• You are starting therapy and do not yet know if you will tolerate it.
• You need the device only during home recovery or post-op.
• You want to try different models before buying.

Costa Rica costs

| Device | New purchase | Rental/month | |---|---|---| | Fixed CPAP | from ₡400,000 | from ₡60,000 | | Auto CPAP (APAP) | from ₡550,000 | from ₡85,000 | | BiPAP S | from ₡900,000 | from ₡120,000 | | BiPAP ST | from ₡1,500,000 | from ₡180,000 |

Hospital Express includes in every rental: device, hose, initial mask, training, maintenance, and 24/7 support.

FAQ

Is BiPAP always better than CPAP? No. BiPAP is better for high pressures, hypoventilation, or patients intolerant to CPAP. For moderate obstructive apnea, CPAP is equally effective and cheaper.

Can I travel with my BiPAP? Yes, in cabin as medical equipment. Notify the airline and carry the prescription.

Do I need a humidifier? In Costa Rica's climate usually yes, especially if you notice nasal dryness or throat irritation.

Can I use oxygen with CPAP/BiPAP? Yes, with a special circuit attachment. Coordinate the correct flow with your pulmonologist.

How to quote

Call 8777-7361 or message us on WhatsApp with:

1. Prescription (CPAP, BiPAP S, BiPAP ST, pressure).
2. Whether you need supplemental oxygen.
3. Your location.

We coordinate delivery, mask fitting, and at-home training in San José, Cartago, Heredia, and Alajuela. Hospital Express — professional respiratory support for your home.