Respiratory muscle strength of patients with unilateral diaphragmatic paralysis and control group
| Paralysis group | Control group | p-value | ||
| Volitional inspiratory muscle strength | ||||
| PImax cmH2O (% pred) | −67±25 (55±23) | −103±30 (100±21) | <0.001 | |
| SNIP cmH2O (% pred) | 57±18 (58±15) | 96±20 (89±28) | <0.001 | |
| Sniff Poes cmH2O | −44±13 | −66±26 | 0.001 | |
| Sniff Pga cmH2O | −10±9 | 36±14 | <0.001 | |
| Sniff Pdi cmH2O | 34±17 | 102±26 | <0.001 | |
| Nonvolitional inspiratory muscle strength | ||||
| Twitch Pdi (bilateral) cmH2O | 5.3±2.7 | 15.3±5.7 | <0.001 | |
| Twitch Pdi cmH2O | Unaffected hemidiaphragm/right for control group | 3.5±1.3 | 7.4±2.7 | <0.001 |
| Twitch Pdi cmH2O | Affected hemidiaphragm/left for control group | 2.5±1.1 | 8.9±3.4 | <0.001 |
Data are presented as mean±sd, unless otherwise stated. PImax: maximal static inspiratory pressure; SNIP: sniff nasal inspiratory pressure; Sniff Poes: oesophageal pressure during sniff manoeuvre; Sniff Pga: gastric pressure during sniff manoeuvre; Sniff Pdi: transdiaphragmatic pressure during sniff manoeuvre; Twitch Pdi: transdiaphragmatic pressure during phrenic nerve magnetic stimulation.