Tables
- Table 1
Settings used for nocturnal ventilation
Patient Device Mode EPAP cmH2O IPAP cmH2O Rate bpm Maximum IPAP s Oxygen flow rate L·min−1 Nasal mask 1 VPAP II S 6 15 NA 1.5 2 Bubble 2 VPAP II S 14 20 NA 1.4 2 Goldseal 3 REM+Duo ST 5 15 15 1.4 Nil Bubble 4 VPAP II S 7 17 NA 1.45 1 Bubble 5 VPAP II S 7 16 NA 1.5 Nil Bubble 6 VPAP II S 6 16 NA 1.2 2 Bubble 7 BIPAP S 5 14 NA NA Nil Standard 8 VPAP II S 13 17 NA 3.0 2 Mirage 9 BIPAP ST 4 16 18 NA 1 Bubble 10 VPAP II ST 5 20 20 1.25 Nil Bubble 11 VPAP II S 13 19 NA 2.1 1.5 Bubble 12 Horizon S 10 16 NA NA 2 Standard 13 REM+Duo ST 6 15 22 1.23 Nil Bubble 14 BIPAP S 10 18 NA NA 1 Standard 15 VPAP II ST 4 14 19 1.3 Nil Bubble 16 VPAP II S 6 13 NA 1.35 1 Mirage Mean 7.6 16.3 18.8 1.6 1.6 -
Devices and nasal masks include: VPAP II (ResMed, Sydney, Australia), REM+Duo (Nelcor Puritan-Bennett, Villers-Les-Nancy, France), BIPAP (Respironics, Murrysville, PA, USA), Horizon (DeVilbuss, Somerset, NJ, USA), Bubble, Standard, Mirage (ResMed, Sydney, Australia), Goldseal (Respironics, Murrysville, PA USA)
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S: Spontaneous mode
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ST: spontaneous timed mode
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EPAP: expiratory positive airway pressure
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IPAP: inspiratory positive airways pressure
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bpm: breaths per min
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NA: not applicable
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- Table 2
Patient characteristics
Patient Age yrs Diagnostic group BMI kg·m−2 Spirometry FEV1 L BTPS FVC L BTPS 1 54 CAL 20 0.6 2.3 2 68 OHS 42.7 1.35 2.09 3 73 Nm 24 1.85 2.61 4 65 OHS 39.6 1.79 2.38 5 62 Nm 29 1.4 1.56 6 64 OHS/CAL 35.7 0.57 0.99 7 53 CAH 32.1 3.3 4.45 8 70 OHS 52.2 1.67 2.02 9 57 CW 22.6 0.47 0.52 10 39 CW 20.3 0.71 0.73 11 43 CW/OSA 28.9 1.4 2.23 12 51 OHS 53.2 1.45 2.05 13 55 CW 18.5 0.85 1.3 14 69 OHS 48.7 1.45 2.04 15 80 Nm 18.9 0.5 0.81 16 73 CW 25 0.4 0.49 Mean±sd 61±11 32±12 1.2±0.7 1.8±1.0 -
BMI: body mass index
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FEV1: forced expiratory volume in one second
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FVC: forced vital capacity
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L BTPS: litres body temperature and pressure saturated
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CAL: chronic airflow limitation
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OHS: obesity-hypoventilation syndrome
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Nm: neuromuscular disease
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OSA: obstructive sleep apnoea
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CAH: central alveolar hypoventilation
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CW: chest wall deformity
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- Table 3
Sleep study data
Nasal mask Full face mask p‐value Patients n 16 16 TST min 339±56 300±79 <0.05 Sleep efficiency % 78±9 70±14 <0.05 Sleep latency min 20±24 21±13 NS Stage 1/2 % TST 70±12 67±12 NS Slow wave sleep % TST 12±11 11±10 NS REM %TST 18±8 22±8 <0.02 AHI events·h−1 1.7±3.4 1.6±2.4 NS Minimum average Sa,O2 TST % 93.4±2.1 92.8±2.5 0.09 NREM % 93.6±2.0 93.0±2.4 <0.05 REM % 92.4±2.9 92.0±3.5 NS Arousal index arousals·h−1 15.6±9.8 15.8±8.8 NS -
Results expressed as mean±SD unless otherwise stated
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TST: total sleep time
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REM: rapid eye movement sleep
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AHI: apnoea-hypopnoea index
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Sa,O2: arterial oxyhaemoglobin saturation
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NREM: nonrapid eye movement sleep
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NS: nonsignificant
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