Respiratory responses to chemical stimuli in control subjects and patients with obstructive sleep apnoea-hypopnoea syndrome (OSAHS)
| Control subjects | Patients with OSAHS | |
| ΔV′I/Sa,O2/BSA L/min/%/m2 | 0.455±0.006 | 0.261±0.003** |
| ΔP0.1/Sa,O2 kPa/% | 0.0033±0.0003 | 0.0024±0.0004** |
| ΔV′I,N/BSA L/min/m2 | 5.45±0.36 | 5.43±0.46 |
| ΔV′I,0/BSA L/min/m2 | 10.9±1.78 | 6.55±0.78** |
| ΔV′I/BSA L/min/m2 | 3.60±0.50 | 1.57±0.30** |
| ΔV′I % | 33.0±2.8 | 24.0±3.6** |
Data are presented as mean±sd
ΔV′I/Sa,O2/BSA: ventilatory response to progressive isocapnic hypoxic stimulation
ΔP0.1/Sa,O2: central inspiratory drive response to progressive isocapnic hypoxic stimulation
ΔV′I,N/BSA: inspiratory minute ventilation during room air breathing
ΔV′I,0/BSA: inspiratory minute ventilation during mildly hypercapnic hypoxic state
ΔV′I: withdrawal response
**: p<0.01 for the comparison with control group