Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach
5th Edition
ISBN:9781285244662
Author:White
Publisher:White
Chapter24: Noninvasive Positive-pressure Ventilation
Section: Chapter Questions
Problem 9SEPT
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Question
Use the table provided to show that the air travels a total distance of 273 mm from the trachea to the alveoli.
Transcribed Image Text:Table Approximate quantification of the bronchial system.
pulmonary branch
generation branch branch
diameter length
(mm)
total
volume
air
(cm³) speed
(cm/s)
cross-
(mm) sectional
area (cm²)
trachea
main bronchus
18.0
120.0
2.5
31
393
427
1
12.2
47.6
2.3
11
lobar bronchus
8.3
19.0
2.1
4.0 462
3
5.6
7.6
2.0
1.5 507
segmental bronchus
4
4.5
12.7
2.5
3.5 392
5
3.5
10.7
3.1
3.3 325
bronchi
2.8
9.0
4.0
3.5 254
w/cartilage in wall
2.3
7.6
5.1
3.8 188
8
1.86
6.4
7.0
4.4 144
1.54
5.4
9.6
5.2 105
10
1.30
4.6
13
6.2
73.6
terminal bronchus
11
1.09
3.9
20
7.6
52.3
12
0.95
3.3
2.7
29
9.8
34.4
bronchioles
13
0.82
44
12
23.1
w/muscle in wall
14
0.74
2.3
69
16
14.1
15
0.66
2.0
113
22
8.92
terminal bronchiole
16
0.60
1.65
180
30
5.40
respiratory bronchiole
respiratory bronchiole
respiratory bronchiole
alveolar duct
17
0.54
1.41
300
42
3.33
18
0.50
1.17
534
61
1.94
19
0.47
0.99
944
93
1.10
20
0.45
0.83
1,600
139
0.60
alveolar duct
21
0.43
0.70
3,200
224
0.32
alveolar duct
22
0.41
0.59
5,900
350
0.18
alveolar sac
23
0.41
0.50
12,000
591
0.09
alveoli, 21 per duct
0.28
0.23
3,200
The air speed is assumed to be 1L/s. The data include that for both lungs. The
number in each generation is 2- (for generations z = 0–23), and 300 × 10° for the
alveoli.
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