Waking Up to the Truth: Modern OSA Management

We're in Calgary this weekend for Vital FM Update, and the update below is one that we've included in our lectures.

-Paul & Simon

Fatigue. Brain fog. Poor concentration. Morning headaches. When patients complain they “just aren’t sleeping,” it’s tempting to reach for lifestyle advice.

No, you can't just prescribe a louder alarm clock.

For many patients, the problem isn’t waking up; it’s never getting restorative sleep in the first place.

As a 2026 Canadian Family Physician article highlights, we are missing Obstructive Sleep Apnea (OSA) in plain sight.

• 40% of men over 50.

• 20% of postmenopausal patients.

• Complete or transient cession of breathing for 10 seconds or longer.

  
  

Stop & Think: Before scrolling down, ask yourself: If a patient has a negative home sleep test but you have a high clinical suspicion, what is your next step?

Diagnosis: Laboratory polysomnography (level 1) remains our gold standard. While home portable monitors have roughly 79% sensitivity, they can miss the mark in complex cases. If a home test is negative but your gut says otherwise, repeat the test or request a level 1 lab study. We determine severity using the Apnea-Hypopnea Index, where 30 or more events per hour lands a patient in the "severe" category.

Management: Address the "why" by looking at the anatomy. Weight loss is the heavy hitter, as it directly improves the biomechanical collapse of the upper airway. While GLP-1 agonists aren’t approved specifically for sleep apnea in Canada, they can still help with weight loss. For direct OSA treatment, we rely on the big two: Continuous Positive Airway Pressure (CPAP) and Mandibular Advancement Devices (MAD). MAD are the go-to for mild to moderate cases or for patients who find the CPAP mask intolerable.

The Dental Twist: Recent evidence suggests we need to be more mindful of our patients' dental work, as the fit of dentures can significantly impact airway volume. If a patient suddenly "decompensates" after new dental implants, the hardware might be crowding the tongue. We should involve our dental colleagues early when patients struggle with device fit or sudden symptom recurrence.

EXAM TIP: On a SAMP, don't forget that MADs are a valid management step. Many residents mistakenly choose "Oxygen therapy" as a treatment for OSA. Oxygen does not fix the mechanical obstruction; you must choose an option that keeps the airway open, like CPAP or a MAD.

Source

Photo By https://www.myupchar.com/en - https://www.myupchar.com/en/disease/sleep-apnea, CC BY-SA 4.0