29
CHART C
Flow Rate Multiplication Factor =
60
Inspiratory Time (sec.)
Flow Rate (liters/min) =
Tidal Volume (ml) x Multiplication Factor
1000
INSP. & EXP. Times & Multiplication Factor (to find flow rate) For Various Respiratory Rates and
I/E Ratios
I/E RATIO
3:1 2:1 1½:1 1:1 1:1½ 1:2 1:3 1:4 1:5 1:6 1:7 1:8
RESP.
RATE
(bpm)
RESP.
CYCLE
(sec.)
10
6
Insp. Time
Exp. Time
Mult. Factor
4.5
1.5
13.3
4.0
2.0
15
3.6
2.4
16.7
3.0
3.0
20
2.4
3.6
25
2.0
4.0
30
1.5
4.5
40
1.2
4.8
50
1.0
5.0
60
.86
5.1
70
.75
5.25
80
.67
5.33
90
15
4
Insp. Time
Exp. Time
Mult. Factor
3.0
1.0
20
2.7
1.3
22.5
2.4
1.6
25
2.0
2.0
30
1.6
2.4
37.5
1.33
2.67
45
1.0
3.0
60
0.8
3.2
75
.67
3.3
90
.57
3.4
105
0.5
3.5
120
.44
3.56
135
20
3
Insp. Time
Exp. Time
Mult. Factor
2.25
.75
26.7
2.0
1.0
30
1.8
1.2
33.3
1.5
1.5
40
1.2
1.8
50
1.0
2.0
60
.75
2.25
80
0.6
2.4
100
0.5
2.5
120
.43
2.57
140
.38
2.62
160
.33
2.67
180
25
2.4
Insp. Time
Exp. Time
Mult. Factor
1.8
0.6
33.3
1.6
0.8
37.5
1.44
.96
41.7
1.2
1.2
50
.96
1.44
62.5
0.8
1.6
75
0.6
1.8
100
.48
1.92
125
0.4
2.0
150
.34
2.06
176
0.3
2.1
200
.27
2.13
225
30
2
Insp. Time
Exp. Time
Mult. Factor
1.5
0.5
40
1.33
.67
45
1.2
0.8
50
1.0
1.0
60
0.8
1.2
75
.67
1.33
90
0.5
1.5
120
0.4
1.6
150
.33
1.67
180
.29
1.71
210
.25
1.75
240
.22
1.78
270
40
1.5
Insp. Time
Exp. Time
Mult. Factor
1.12
.38
53.3
1.0
0.5
60
0.9
0.6
66.7
.75
.75
80
0.6
0.9
100
0.5
1.0
120
.38
1.12
160
0.3
1.2
200
.25
1.25
240
.21
1.29
280
.19
1.31
320
.17
1.33
360
50
1.2
Insp. Time
Exp. Time
Mult. Factor
0.9
0.3
67
0.8
0.4
75
.72
.48
83.3
0.6
0.6
100
.48
.72
125
0.4
0.8
150
0.3
0.9
200
.24
.96
250
0.2
1.0
300
.17
1.03
350
.15
1.05
400
.13
1.07
450
60
1.0
Insp. Time
Exp. Time
Mult. Factor
.75
.25
80
.67
.33
90
0.6
0.4
100
0.5
0.5
120
0.4
0.6
150
.33
.67
180
.25
.75
240
0.2
0.8
300
.17
.83
360
.14
.86
420
.13
.87
480
.11
.89
540
70
.86
Insp. Time
Exp. Time
Mult. Factor
.65
.21
92.3
.57
.29
105
.52
.34
117
.43
.43
140
.34
.52
175
.29
.57
210
.21
.65
280
.17
.69
350
.14
.72
420
.12
.74
490
.11
.75
560
.10
.76
630
