In patients with pseudohypertrophic Duchenne muscular dystrophy, which sleep-related problem is NOT typical?

In patients with pseudohypertrophic Duchenne muscular dystrophy, which sleep-related problem is NOT typical?

• A. Hypercapnia and oxygen desaturation during sleep
• B. Increased vital capacity
• C. Central sleep apnea
• D. Increasing sleep disruption

Answer: (C)

In Duchenne muscular dystrophy, sleep-related breathing problems arise mainly from weakness of the respiratory muscles, especially the diaphragm and intercostals. During sleep, reduced muscle tone makes ventilation less effective, so CO2 builds up and oxygen levels can fall. This nocturnal hypoventilation with hypercapnia and desaturation is a common pattern as the disease progresses, and it often leads to increasing sleep disruption due to the body’s response to gas exchange problems. Central sleep apnea, on the other hand, comes from reduced or unstable central drive to breathe, with pauses in breathing and little or no respiratory effort. In neuromuscular disorders like Duchenne, the primary issue is muscle weakness rather than a failure of the brain’s Respiratory control center, so central sleep apnea isn’t typical. You may still see airway-related or obstructive issues in some cases, but the hallmark for this condition is nocturnal hypoventilation driven by weak respiratory muscles rather than central apnea.

In Duchenne muscular dystrophy, sleep-related breathing problems arise mainly from weakness of the respiratory muscles, especially the diaphragm and intercostals. During sleep, reduced muscle tone makes ventilation less effective, so CO2 builds up and oxygen levels can fall. This nocturnal hypoventilation with hypercapnia and desaturation is a common pattern as the disease progresses, and it often leads to increasing sleep disruption due to the body’s response to gas exchange problems.

Central sleep apnea, on the other hand, comes from reduced or unstable central drive to breathe, with pauses in breathing and little or no respiratory effort. In neuromuscular disorders like Duchenne, the primary issue is muscle weakness rather than a failure of the brain’s Respiratory control center, so central sleep apnea isn’t typical. You may still see airway-related or obstructive issues in some cases, but the hallmark for this condition is nocturnal hypoventilation driven by weak respiratory muscles rather than central apnea.