Figures
- FIGURE 1
Scatterplots of a) maximal expiratory pressure (MEP)/maximal inspiratory pressure (MIP) and b) MEP/sniff nasal inspiratory pressure (SNIP) against fall in seated to supine vital capacity (VC) at presentation in subjects with diaphragm paralysis (a) r2=0.76, b) r2=0.68; p<0.05). Receiver operating characteristic curves comparing the percentage postural fall in VC with c) MEP/MIP and d) MEP/SNIP.
Tables
- TABLE 1
Aetiology of diaphragm paralysis
Patients n Idiopathic 31 Post-heart–lung transplant 18 Post-coronary artery bypass grafting 2 Post-radiofrequency cardiac ablation 2 Post-spinal surgery 1 Post-thyroidectomy 1 Post-mastectomy 1 Post-radiotherapy 1 Post-intensive care unit admission 1 - TABLE 2
Symptoms and clinical signs in 60 patients with diaphragm paralysis at presentation
Patients n Dyspnoea on exertion 28 Orthopnoea 32 Paradoxical abdominal motion 10 Difficulty in weaning from ventilation 10 Morning headaches 9 Daytime somnolence 9 Immersion dyspnoea 3 Post-operative nocturnal desaturation 3 Sleep disturbance 3 - TABLE 3
Lung function at presentation and after 1 year of noninvasive ventilation (NIV)
At presentation After 1 year of NIV p-value Seated VC (L) 1.7±1.2 2.1±0.9 <0.001 Seated VC (% pred) 49±0.17 60±0.2 <0.001 Supine VC (L) 1.1±0.9 1.8±1 <0.001 Fall in VC seated to supine (% seated) 42±0.16 29±0.17 <0.001 MEP (cmH20) 103±8 132±7 0.14 MEP (% pred) 84±4 96±6 0.19 MIP (cmH20) 34±10 50±8 0.27 MIP (% pred) 32±5 63±5 0.31 SNIP (cmH20) 29±5 47.5±7 <0.001 SNIP (% pred) 28±3 42±2 <0.001 MEP/MIP ratio 3±1.2 2.6±1.4 <0.001 MEP/SNIP ratio 3.5±1.9 2.9±1.7 <0.001 Data are presented as mean±sd, unless otherwise stated. VC: vital capacity; MEP: maximal expiratory pressure; MIP: maximal inspiratory pressure; SNIP: sniff nasal inspiratory pressure.
