Reasons for tracheostomy and Pco 2 and FVC at time of operation
| Type of ventilation/diagnosis | Reasons | |||||
|---|---|---|---|---|---|---|
| Progression of disease and hypoventilation unable to be controlled by non-invasive ventilation | Uncontrollable secretions | Pneumonia | Total of indications | Pco2 (mm Hg) | FVC (l; % predicted) | |
| Negative pressure | ||||||
| Poliomyelitis | 104-151 | 3 | 1 | 144-151 | 55.7 (13.8) | 746 (330); 18 (8)% |
| Non-Duchenne's myopathy | 2 | — | — | 2 | 68.5 (10.5) | 550 (350); 14 (10)% |
| Motor neurone disease | 1 | — | — | 1 | 53 | 300; 9% |
| Mouth/nasal intermittent positive pressure (M/NIPPV) | ||||||
| Poliomyelitis | 1 | — | — | 1 | 69 | 1100; 31% |
| Duchenne's muscular dystrophy | 5 | 3 | 2 | 10 | 46.6 (10.3) | 490 (353); 10 (6)% |
| Other myopathy | 1 | — | — | 1 | 54 | 500; 11% |
Values are mean (SD) unless otherwise stated.
Pco 2 = carbon dioxide tension; FVC = forced vital capacity.
↵4-151 Significantly different from polio-M/NIPPV group, p<0.05 (Wilcoxon rank sum test).