Clinical signs and symptoms of obstructive sleep apnea (OSA) requiring diagnostic evaluation, including nocturnal, daytime, and cardiovascular manifestations — evaluated at our West Hills, CA office.
Diagnostic Criteria Overview
Obstructive sleep apnea is defined by the AASM as an apnea-hypopnea index (AHI) ≥5 events per hour with associated symptoms, or AHI ≥15 events per hour regardless of symptoms. Severity classification: mild (AHI 5–14.9), moderate (AHI 15–29.9), severe (AHI ≥30). Respiratory disturbance index (RDI) incorporating RERAs may exceed AHI in UARS presentations.
Nocturnal Symptoms
- Witnessed apneas: Partner-reported cessation of breathing lasting ≥10 seconds; high specificity for OSA
- Snoring: Habitual loud snoring reflecting partial upper airway obstruction; present in >70% of OSA patients
- Gasping or choking arousals: Abrupt awakening associated with respiratory effort; corresponds to arousal from obstructive events
- Nocturia: ≥2 nocturnal voids; attributed to increased atrial natriuretic peptide release secondary to negative intrathoracic pressure
- Nocturnal diaphoresis: Excessive sweating related to autonomic arousal
- Bruxism: Sleep bruxism co-occurs with OSA in a significant proportion of patients; associated with arousal from respiratory events
- Insomnia: Sleep maintenance insomnia may be a presenting feature, particularly in women
Daytime Symptoms
- Excessive daytime sleepiness (EDS): Quantified by Epworth Sleepiness Scale (ESS); score ≥10 indicates significant EDS. Predominant in moderate-to-severe OSA
- Fatigue and non-restorative sleep: Distinct from sleepiness; common in UARS and mild OSA
- Cognitive impairment: Deficits in attention, working memory, and executive function secondary to sleep fragmentation and intermittent hypoxia
- Morning headaches: Attributed to nocturnal hypercapnia or hypoxia-induced cerebral vasodilation; typically resolve within 30–60 minutes of waking
- Dry mouth or sore throat: Consequence of mouth breathing during sleep
- Mood disturbance: Depression and irritability associated with chronic sleep disruption
Physical Examination Findings
The Mallampati score (class III–IV), tonsillar hypertrophy (Friedman grade III–IV), retrognathia, macroglossia, crowded oropharynx, elevated BMI (≥30 kg/m²), and increased neck circumference (≥40 cm in women, ≥43 cm in men) are associated with elevated OSA risk. Lateral cephalometric analysis may reveal skeletal patterns predisposing to airway compromise.
Screening Tools
The STOP-BANG questionnaire (sensitivity 92.9% for moderate-severe OSA at score ≥3) and the Epworth Sleepiness Scale are validated screening instruments used in clinical practice. The Berlin Questionnaire and NoSAS score are alternative validated tools.
Cardiovascular and Metabolic Comorbidities
Untreated OSA is independently associated with systemic hypertension, cardiac arrhythmia (particularly atrial fibrillation), type 2 diabetes, metabolic syndrome, pulmonary hypertension, and increased cardiovascular mortality. These associations strengthen the indication for treatment in symptomatic patients.
Related Conditions
Patients are seen at the West Hills office from Los Angeles County, Ventura County, West Hills, Canoga Park, Woodland Hills, Calabasas, Sherman Oaks & Encino, Northridge & Chatsworth, Thousand Oaks, Simi Valley, Agoura Hills & Westlake Village.
