Biomedical Engineering Reference
In-Depth Information
Fig. 8.16
The dendrogram tree clustering for the adult data set using (
8.15
), in healthy (H), chronic
obstructive pulmonary disease (COPD) and kyphoscoliosis (KS)
between healthy and pathologic cases, since the resonance frequency changes sig-
nificantly from typically 8 Hz for a healthy adult to 14 Hz for a patient with mild
airway obstruction, and about 20 Hz in cases of severe obstruction [
116
]. The val-
ues obtained for the respiratory impedance data and resonant frequency have been
compared with reported values from literature. We found that the values were very
close to those reported in literature, namely for healthy adults [
116
]; for COPD [
6
];
for asthmatic children [
17
]; for cystic fibrosis [
15
,
35
]; for healthy children [
33
] and
for kyphoscoliosis [
103
]. Moreover, the impedance values and shape were signifi-
cantly close to those identified with several parametric models, such as in [
29
,
69
].
