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Indications for a nighttime sleep study in patients with neuromuscular and chest wall disease

Indications for a nighttime sleep study in patients with neuromuscular and chest wall disease
Symptoms of SDB (eg, excessive daytime sleepiness, disruptive sleep, choking during sleep, snoring)
Arterial blood gases showing hypoventilation (PaCO2 >45 mmHg [6 kPa])
FVC <50% predicted
Severely reduced PImax (<60% predicted)
Unexplained cor pulmonale or polcythemia
We have a low threshold to suspect SDB in patients with neuromuscular and chest wall disorders where SDB is a known complication (eg, those with respiratory muscle weakness). This includes but is not limited to patients with a history of poliomyelitis (especially with initial involvement of respiratory, trunk, or bulbar involvement), kyphoscoliosis, diaphragmatic paralysis, amyotrophic lateral sclerosis, or Duchenne muscular dystrophy.
SDB: sleep disordered breathing; PaCO2: arterial tension of carbon dioxide; FVC: forced vital capacity; PImax: maximal inspiratory pressure at the mouth.
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