J. L. MAUDERLY AND J. A. PICKRELL 673 
Table II. — Values Obtained by Single Measurements on 10 Male and 10 Female Beagle Dogs Aged? to 10 Years 
Standard 
Parameter 
Symbol 
Units 
Mean 
Deviation 
Range 
wt 
kg 
12. 7t 
2.6 
7.9 
— 18.3 
XvCO^l J. dlil^i. jr J.* CllUCllt^J' evil/ 
f 
breaths/min 
22 
7 
11 
— 36 
Tif^fl I Vnlll TYl P ( TCtCiTYX 511 1* ^ 
Vt 
ml BTPS* 
197 
67 
123 
— 412 
Minute volume (room air) 
Ve 
liters BTPS/min 
4.18 
1.64 
1.74 
— 7.17 
Respiratory frequency (100% O2) 
f 
breaths/min 
18 
6 
11 
— 29 
Tidal volume (100% O2) 
Vt 
ml BTPS 
204 
45 
158 
— 298 
Minute volume (100% O2) 
Ve 
liters BTPS/min 
3.47 
0.75 
2.09 
— 4.67 
x/yiiaiiiiu jJiiiuiuiiiiry miii jjiidiicc: 
Cl fly n 
ml /cm HgO 
24 
25 
—109 
Dynamic pulmonary resistance 
cmUqO/liters per sec 
J- * + 
11 
3 
— 40 
H'm-i v^cJnnQl ^QT\Q^*ii"ir 
FRC 
ml BTPS 
440 
129 
260 
—816 
T.nnc olpflvflripp inHpTf 
LCI 
liters VE/liter FRC 
23 
5 
11 
— 32 
CO diffusing capacity 
^co 
ml/min/mm Hg 
8.3 
3.1 
3.8 
— 13.8 
Fractional uptake of CO 
decimal fraction 
0.477 
0.068 
0.374 
— 0.611 
Alveolar O2 tension 
PAo„ 
mm Hg 
80 
8 
64 
— 91 
l>cx lal CdlaJL'll 
Pao„ 
illlli -El^ 
1U4. 
10 
51 
— 85 
A iPvrtin ii vtpfio 1 0'> o'vaHiPTit' 
PA-ao„ 
TYl TYl TTtT 
llilii 
lot 
5 
2 
— 21 
Arterial CO2 tension 
Pace, 
mm Hg 
42 
6 
33 
— 58 
Alveolar CO2 tension 
PAco'„ 
mm Hg 
37 
5 
29 
— 47 
Arterial-alveolar CO2 gradient 
PA-Aco„ 
mm Hg 
5 
4 
1 
— 17 
Arterial pH 
pH 
mm Hg 
7.37 
O.03 
7.29 
— 7.41 
O2 saturation of arterial hemoglobin 
So., 
% 
88t 
5 
76 
— 94 
O2 consumption 
Vo", 
ml STPDt/min 
94 
35 
55 
—207 
CO2 elimination 
Vco„ 
ml STPD/min 
95 
38 
52 
—201 
Respiratory exchange ratio 
RER 
Vco„/Vo„ 
1.00 
0.11 
0.83 
— 1.29 
Specific ventilation 
VeVo„ 
mlVE/mfVo., 
45t 
.10 
29 
— 63 
Alveolar ventilation 
% Va' 
% of total Ve 
54t 
4 
46 
— 62 
Effective ventilation 
<-/c Veft 
% of total Vj. 
48 
6 
36 
— 60 
Alveolar dead space ventilation 
%V.,^_ 
% of total Ve 
6 
3 
2 
— 15 
• BTPS = Volume corrected to body temperature and pressure and saturation with water vapor, 
t STPD — Volume corrected to standard conditions (273°K, 760 mm Hg, dry). 
I Indicates parameters with means significantly different from identical measurements on younger dogs as shown in Table I. 
Table 111.— -Values at Rest and During Treadmill Exercise Obtained by Duplicate Measurements on 7 Male and 6 
Female Beagle Dogs Aged 12-14. Months 
Parameter 
Speed — 0.0 mph 
Respiratory frequency 
Tidal volume 
Minute volume 
O2 consumption 
CO2 elimination 
Respiratory exchange ratio 
Specific ventilation 
Speed = 3.0 mph 
Respiratory frequency 
Tidal volume 
Minute volume 
O3 consumption 
CO2 elimination 
Respiratory exchange ratio 
Specific ventilation 
Speed = 4.5 mph 
Respiratory frequency 
Tidal volume 
Minute volume 
O3 consumption 
CO2 elimination 
Respiratory exchange ratio 
Specific ventilation 
Units 
breaths/min 
ml BTPS* 
liters BTPS/min 
ml STPDt/min 
ml STPD/min 
Vco„/Vo„ 
ml VE/m'l Vo, 
Mean 
12 
506 
5.35 
115 
97 
0.84 
47 
95 
329 
24.82 
440 
380 
0.86 
57 
126 
302 
35.17 
555 
466 
0.83 
65 
Standard 
Deviation 
4 
116 
1.20 
21 
21 
0.05 
8 
57 
168 
6.44 
83 
82 
0.05 
13 
30 
70 
7.68 
120 
100 
0.05 
14 
Range 
4 — 20 
309 —677 
3.22— 6.69 
89 —152 
66 —139 
0.74— 0.93 
36 — 62 
28 — 2.0 
168 —675 
15.35— 39.63 
304 —573 
282 —550 
0.76— 0.96 
35 — 78 
85 —154 
210 —436 
20.54— 44.25 
366 —688 
289 —577 
0.75— 0.89 
39 — 91 
• BTPS 
t STPD 
= Volume corrected to body temperature and pressure and saturation with water vapor. 
= Volume corrected to standard conditions (273° K, 760 mm Hg, dry). 
