CPAP Titration: Finding Your Optimal Pressure

If you have been diagnosed with sleep apnea and your doctor has recommended CPAP therapy, you will likely need a CPAP titration study before you begin treatment at home. This overnight sleep study has one goal: finding the right air pressure setting for your specific airway.

CPAP stands for continuous positive airway pressure. The device delivers a steady stream of pressurized air through a mask while you sleep. This keeps the airway open and prevents the breathing pauses that cause sleep apnea. But the correct pressure level is different for every person. Too little pressure and the airway still collapses. Too much and the therapy becomes uncomfortable. A titration study finds your exact setting.

The study takes place overnight at a sleep center, hospital, or specially equipped hotel room. You arrive in the early evening and prepare much like you would for a hotel stay. Bring comfortable clothes to sleep in, your normal toiletries, and anything else you need for your nightly routine. Avoid caffeine after lunch and skip any hair products that can interfere with the sensors. If you take regular medications, ask your doctor in advance whether to continue them.

When you are ready for bed, a sleep technologist will fit you with a CPAP mask connected by tubing to a small electric unit. Getting the mask fit right is important. Tell the technologist right away if the mask feels uncomfortable or if you notice air leaking around the edges. The technologist will also attach sensors to your body to monitor brain waves, heart rate, breathing, oxygen levels, and limb movements throughout the night — the same sensors used in a standard sleep study.

During the night the technologist monitors your breathing remotely and gradually adjusts the air pressure upward. The process starts at a low level and increases until your breathing is stable and the apnea events stop. If the mask needs adjustment, the technologist will come in to help. In the morning the sensors are removed and you are free to leave.

In some cases, when sleep apnea is severe and clearly confirmed, the titration can be done in the second half of the same night as the diagnostic sleep study. This is called a split-night study.

After the study your sleep doctor reviews the data and determines your prescribed CPAP pressure. You will then receive instructions for obtaining your home CPAP unit and mask.

Occasionally a titration study does not produce a clear result. This can happen if your sleep was too disrupted or if standard continuous pressure does not fully control your apnea. In those cases your doctor may recommend a second titration, a variable pressure device called BPAP, or an auto-adjusting CPAP. Auto-adjusting devices sense your breathing in real time and change the pressure automatically, storing the data for your doctor to review.

If you have ongoing problems with your CPAP after starting home treatment — mask discomfort, pressure that feels wrong, nasal congestion, or air leaks — contact your sleep doctor. Adjustments to pressure, mask type, or the addition of a heated humidifier can often resolve these issues. Never change your settings on your own without guidance.