Diagnosed with Sleep Apnea After a Sleep Test? What Happens Next?

After undergoing a sleep study and being diagnosed with obstructive sleep apnea (OSA), the next step is not just starting treatment—but understanding your report in detail and individualizing therapy.

Beyond AHI: What Your Sleep Specialist Really Looks At

While the Apnea-Hypopnea Index (AHI) is important, treatment decisions are not based on AHI alone.

A comprehensive interpretation of your sleep study includes:

• Sleep efficiency (how well you actually sleep)

• REM and NREM sleep distribution

• Oxygen desaturation index (ODI)

• Oxygen nadir (lowest oxygen level reached)

• Presence of positional OSA

• Periodic limb movements (PLMS)

• Arousal index

  It is the combination of these parameters, rather than a single value, that guides management.

  
  

What is CPAP Titration?

If positive airway pressure therapy is planned, the next step is titration.

Titration means:

• Identifying the optimal pressure required to keep the airway open

• Eliminating apneas, hypopneas, snoring, and desaturations

This can be done by:

• In-lab titration study

• Auto-CPAP (APAP) devices

The goal is to achieve normalized breathing with good sleep quality

When is CPAP Enough?

CPAP is usually sufficient when:

• Obstructive events are the primary issue

• Oxygen desaturation improves with airway splinting

• No significant hypoventilation is present

When is BiPAP Considered?

Bi-level Positive Airway Pressure (BiPAP) may be preferred in certain situations:

• High pressure requirement on CPAP

• Poor tolerance to CPAP

• Presence of hypoventilation syndromes

• Coexisting conditions like:

  • COPD (overlap syndrome)

  • Obesity hypoventilation syndrome

BiPAP provides:

• Higher inspiratory pressure (IPAP)

• Lower expiratory pressure (EPAP)

• Better ventilation support

When is Oxygen Added to PAP Therapy?

Supplemental oxygen may be added when:

• Persistent nocturnal hypoxemia despite adequate PAP therapy

• Significant oxygen desaturation not fully corrected by airway support

• Coexisting lung disease (e.g., COPD)

Important: Oxygen is not a substitute for PAP therapy but may be used in combination when indicated

Individualised Treatment Planning

Management of sleep apnea is not one-size-fits-all.

Treatment decisions depend on:

• Sleep study parameters

• Symptom profile

• Tolerance to therapy

• Associated physiological disturbances

A detailed, expert interpretation ensures accurate therapy selection and better outcomes

Moving Forward After Diagnosis

A sleep study diagnosis is the starting point. The next step is a structured, personalized treatment plan, guided by a sleep specialist, to restore normal sleep and breathing.