Obstructive Sleep Apnea: Do Positional Patients Become Nonpositional Patients With Time?

Area of Science:

• Sleep Medicine
• Respiratory Medicine
• Otolaryngology

Background:

• Obstructive sleep apnea (OSA) is a common sleep disorder.
• Positional patients (PPs) experience breathing abnormalities primarily in the supine position.
• Positional therapy (PT) involves avoiding the supine posture and is a treatment for PPs.

Purpose of the Study:

• To assess the long-term stability of positional obstructive sleep apnea (OSA).
• To identify factors influencing the conversion of positional patients (PPs) to non-positional patients (NPPs).
• To evaluate the implications for positional therapy (PT) effectiveness over time.

Main Methods:

• Analysis of polysomnographic (PSG) recordings from 81 adult OSA patients initially identified as PPs.
• Follow-up PSG evaluations were conducted after an average of 6.6 years.
• Comparison of clinical and sleep parameters between patients who remained PPs and those who converted to NPPs.

Main Results:

• 70.4% of PPs remained PPs at follow-up, while 29.6% converted to NPPs.
• Significant increases in BMI, AHI, and lateral AHI, and a decrease in SpO2 during REM sleep were observed in both groups.
• These parameter changes were more pronounced in patients who converted to NPPs.

Conclusions:

• A majority of positional OSA patients remain positional long-term, suggesting continued benefit from positional therapy if adherence is good.
• Positional therapy may become suboptimal for patients who convert to non-positional status, necessitating regular monitoring.
• Early intervention with positional therapy may prevent the worsening of OSA in positional patients.