Chapter33-Disorders Of Sleep Flashcards
What is sleep apnea
Repeated episodes of Complete cessation of air flow for 10 seconds or longer
Central sleep apnea means
No respiratory effort
Central sleep apnea may be caused by ?
Stroke
Chf
High altitude hypoxemia
What is mixed sleep apnea
Cass followed by osa
Obstructive sleep apnea occurs when
There is respiratory effort but an obstruction prevents airflow
What is hypopnea
A decrease in breathing without a complete cessation of airflow
A 30 percent decrease in airflow and a 4 percent SpO2 decrease is called
Hypopnea
What is the most common type of sleep apnea
Osa
What is the primary cause of osa
Unstable pharyngeal airway
What are adverse consequences of sleep apnea
Hypertension Right ventricular hypertrophy/failure Mi Stroke Insulin resistance
What bmi is osa likely
Greater than 28
What is overlap syndrome
Osa and copd
When does the worst desaturation occur
During rem sleep
What are symptoms of sleep apnea
Excessive daytime sleepiness
Gasping, snoring or choking at night
Morning headaches
What is the gold standard for diagnosis of osa
Level 1 sleep study
What lifestyle factors should be considered to improve sleep apnea
Weight loss
Limiting alcohol
Limiting sedatives and hypnotics
Avoiding sleep deprivation
What is the first line therapy for osa
Cpap
What cpap levels are usually needed for osa
7.5 to 12.5
Side effects of cpap
Claustrophobia
Nasal congestion
Skin irritation
Nasal dryness
What features of sleep studies should be analyzed and reported
Ahi Arousal index Sleep stave distribution Frequency of desat Mean SpO2
Mild ahi is
5-15 per hour
Moderate ahi is?
15-30
Severe ahi is?
Greater than30
