Clinical Background:
27 year-old patient is here for an Attended Diagnostic
Polysomnography.
PROCEDURE:
This attended polysomnogram montage using Compumedics Profusion 3
Software included recorded video, 6 EEG electrodes for frontal,
central, and occipital monopolar recordings, 2 EOG electrodes,
ECG, and chin EMG electrodes, snoring microphone, thermistor,
airflow pressure, thoracic, and abdominal respiratory effort,
pulse oximetry, leg movement, body sleeping position, and body
movement. The 30 sec. epochs were scored according to The AASM
Manual for the Scoring of Sleep and Associated Events: Rules,
Terminology and Technical Specifications (2007).
SLEEP SCORING DATA:
Lights Out / On (clock times): 21:42:10 / 05:20:41
Total Recording Time (TRT) (min): 459.5
Total Sleep Time (TST) (min): 370.5
Sleep Efficiency: 80.8%
Sleep Latency (min): 17.0
Stage REM Latency (min): 101.5
Wake after sleep onset (WASO) (min): 71.0
Stage N1 Sleep (min, % of TST): 21.0 (5.7%)
Stage N2 Sleep (min, % of TST): 212.5 (57.4%)
Stage N3 Sleep (min, % of TST): 87.0 (23.5%)
Stage R Sleep (min, % of TST): 50.0 (13.5%)
Supine Sleep (min): 161.0
Arousals (index, #): 34.0 (210)
RESPIRATORY ANALYSIS: (index = #/hr)
Apnea/Hypopnea Index (AHI): 1.9
NREM AHI: 1.3
REM AHI: 6.0
Non-Supine AHI: 1.1
Supine AHI: 3.0
Respiratory Disturbance Index (RDI): 16.0
NREM RDI: 14.0
REM RDI: 28.8
Apneas (index, #): 0.2 (1)
Obstructive Apneas (index, #): 0.0 (0)
Mixed Apneas (index, #): 0.0 (0)
Central Apneas (index, #): 0.2 (1)
Hypopneas (index, #): 1.8 (11)
RERAs (index, #): 14.1 (87)
Mean Awake SpO2: 96%
Mean Sleep SpO2: 95%
Minimum Sleep SpO2: 91%
Sleep Time with SpO2 < 88% (min, % of TST): 0.0 (0.0%)
Cheyne Stokes breathing: No
Snoring: Yes
CARDIAC ANALYSIS:
Mean Awake HR: 62
Mean Sleep HR: 63
Bradycardia: No
Asystole: No
Sinus tachycardia: No
Narrow Complex Tachycardia: No
Wide Complex Tachycardia: No
Atrial Fibrillation: No
Other: None
LIMB MOVEMENT ANALYSIS:
Periodic Limb Movements of sleep (PLMS) (index, #): 8.1 (50)
PLMS with arousals (index, #): 1.0 (6)
OTHER ABNORMALITIES:
No other unusual body movements were demonstrated and no seizure
activity was noted.
CLINICAL INTERPRETATION:
1. Polysomnographic findings are consistent with moderate
obstructive sleep disordered breathing with evidence of upper
airway resistance syndrome (UARS). The overall RDI was 16.0
events per hour of sleep and the lowest oxygen saturation was 91
%.
2. Snoring was present per technician's notes.
3. Periodic limb movements of sleep did not appear significant.
4. The most efficacious treatment modality for sleep apnea is
continuous positive airway pressure (CPAP) and surgical treatment
modalities are alternative options. An oral appliance may be
effective treatment in mild cases. Non-specific treatment
options include weight loss of at least 10% of body weight (if
overweight), avoidance of supine posture (i.e. side-sleeping or
elevation of the head 30 degrees is preferred), and avoidance of
sleep deprivation, alcohol and nicotine.