Background
Methods
Patients
Parameters | Median [1st-3rdquartiles] |
---|---|
Anthropometric data | |
Age (years) | 68 [56.5-73] |
Gender (male/female) | 12/4 |
BMI (kg/m2) | 21.4 [19.1-26.6] |
Smoking (yes/no) | 10/6 |
Neurological assessment | |
ALS-FRS-R score | 31 [26.5-35] |
Norris bulbar score | 35 [26.2-38] |
Respiratory assessment | |
Dyspnea score on MMRC scale | 3 [1-3.5] |
Inspiratory contraction of inspiratory neck muscles during quiet breathing in supine position (yes/no) | 16/0 |
Inspiratory contraction of inspiratory neck muscles during indirect calorimetry in sitting position (yes/no) | 11/5 |
PaCO2 (mmHg) | 45 [42.5-48] |
PaO2 (mmHg) | 73 [66.5-77.5] |
Bicarbonate (mmol/l) | 28 [27-29.5] |
Time spent with SpO2 < 90% (% of recording time) | 30 [6.2-72] |
FVC sitting (ml) | 1990 [1140-2045] |
FVC sitting (% predicted) | 47 [35-54] |
FVC supine (ml) | 1650 [847-2182] |
FVC supine (% predicted) | 38.5 [30-58] |
PiMAX (cmH2O) | 31 [19.7-58.2] |
PiMAX (% predicted) | 37 [19.5-55.2] |
SNIP (cmH2O) | 32 [16.5-40.2] |
SNIP (% predicted) | 39 [23.2-42.7] |
Inclusion criteria
Non-inclusion criteria
Assessments
Neurological assessment
Respiratory assessment
Nutritional assessment
Statistical analysis
Results
Spontaneous breathing in room air | Noninvasive ventilation median [1st-3rdquartiles] | p-value | |
---|---|---|---|
Vt (ml) | 406.8 [289.5-486.8] | 535.7 [450.8-578.4] | 0.003 |
RF (/min) | 17.6 [14.7-23.9] | 15.4 [14.5-18.4] | 0.02 |
Ventilation (l/min) | 7.1 [6.5-7.9] | 8.3 [7.5-9.9] | <0.001 |
PaCO2 (mmHg) (n = 12)* | 47 [43-48] | 41.5 [38-44] | 0.002 |
PaO2 (mmHg) (n = 12)* | 69 [65.7-75.2] | 88.5 [70-97.5] | 0.005 |
A-a gradient (mmHg) (n = 12)* | 23.1 [16.6-27.6] | 9.2 [3.9-29.3] | 0.03 |
Vd (ml) (n = 12)* | 117.7 [78.2-141.6] | 178.9 [152.6-211.8] | 0.01 |
Time spent with SpO2 < 90% (% of recording time) | 30 [6.2-72] | 1 [1-3] | <0.001 |
REESB
| REENIV
| REESB-REENIV
| ||||
---|---|---|---|---|---|---|
Gender | 0.523* 0.037-0.809 | 0.038 | 0.714* 0.337-0.893 | 0.001 | 0.282 -0.248;0.683 | 0.289 |
Norris bulbar score | 0.582* 0.099-0.843 | 0.023 | 0.677* 0.253-0.883 | 0.005 | 0.157-0.386;0.620 | 0.575 |
FVC sitting (ml) | 0.577* 0.038-0.856 | 0.039 | 0.635* -0.022-0.821 | 0.019 | 0.079-0.494;0.604 | 0.798 |
PiMAX (cmH2O) | 0.826* 0.359-0.962 | 0.006 | 0.707* 0.080-0.933 | 0.033 | -0.044 -0.688;0.639 | 0.910 |