A description and operational precedures are presented for a computer program, written in Super Basic, that calculates oxygen uptake, carbon dioxide production, and related ventilation parameters. Program features include: (1) the option of entering slope and intercept values of calibration curves for the O2 and CO2 and analyzers; (2) calculation of expired water vapor pressure; and (3) the option of entering inspured O2 and CO2 concentrations. The program is easily adaptable for programmable laboratory calculators

Castle, B. L.

Castle, G.

Greenleaf, J. E.

English

NASA Technical Reports Server

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Produced by the NASA Center for Aerospace Information (CASI) 
https://ntrs.nasa.gov/search.jsp?R=19790013570 2020-03-21T23:57:28+00:00Z
NASA TNdwAoM t1Awnora 
Computer Program for CalculatmAn
of Oxygen U-JL-E--
B. L. Castle, G.- Castle, and J. E. Greenleaf
(NASA —TH-78585) COMPUTER PROGRAM FOB
CALCULATION OF OXYGEN UPTIKE (N1SA) 13 p HC
102/RF A01
	 CSCL 06P
N79-21741
Unclas
G3/51 14730
April 1979
Y
^.J y 
^e
9`q^s cFi`  ^^'9
F..
	 NfGA 
National Aeronautics and
Space Administration
NASA Technical Memorandum 78585
t
Computer Program for Calculation
of Oxygen Uptake
B. L. Castle
G. Castle
J. E. Greenleaf, Ames Research Center, Moffett Field, California
NASA
r,W:on,il Aeronauh(a^n.c
Space Administr^ition
Ames Research Center
lv!:,ffer Field C,i0orrio
GENERAL PROGRAM DESCRIPTION
This program, written in Super Basic, can be used to calculate 0:, uptake
and CO 2 production in resting and exercising human test subjects. The set of
data from which these calculations are made is entered into the program;
included are measurements of Oz and CO 2 in inspired air and expired respiratory
gas, and various gas volumes, temperature, and pressure measurements. A flow
x^
diagram of the program is presented in Fig. 1.
The program will accommodate readings from two types of 0 2 and CO2
analyzers: indirect readout analyzers (Steps 10.1 and 12.1) which require the
use of calibration curves to convert numerical readings of 0 2 and CO 2 concen-
trations into percent, and direct readout analyzers (Steps 10, 11, 12, 13)
which read directly in percent. For the indirect readout analyzers, the slopes
and intercepts of the calibration curves must be entered as constants
(Steps 2, 3, 4).
The program begins with a prompt (Step 5) that allows the operator to
either print a set of instructions for running the program, or to go directly
to the data input section of the program. The data can be entered "conversa-
tionally" through a series of prompts (Steps 6, 6.1, and 6.2), or they can be
entered all at once, according to a specified format, without interruption
(Steps 7, 8). Expired water vapor pressure is calculated in either Step 6.2A
or 8.1, depending on which option for data input is selected.
Direct or indirect measurements of the concentrations of inspired CO 2 and
02 can be entered in the program (Steps 14-19, excluding 14.1), to be used
later in the ventilation calculations. However, if they are not measured,
constant values for inspired CO 2 and 02 concentrations can be used; 0.03% and
20.93%, respectively, are commonly used. These values have been incorporated
into the program.
The major ventilation measurements in the 0 2 uptake equation are printed
out in Step 20; oxygen uptake, expressed in ml/kg/min, is printed in Step 22.2.
The basic equations used to calculate these ventilation measurements were
taken from Consolazio et al. (1).
A "no" input in response to the query "are you finished?" (Step 23)
recycles the program to Step 6 for the next set of input data. One run
through the program without use of the conversational queries takes less than
2 min. Run-time with the conversational queries requires less than 3 min.
The run-time is partly dependent on the speed of the printer.
PROGRAM PRINTOUT AND EQUATIONS
The complete program is presented in Fig. 2; the statement numbers,
description, and symbols for each function are given in Fig. 3. The basic
equations used are as follows (1):
Water vapor pressure (P8) = P7/10 Z8 (760) (Ref. 2) (Step 6.2A or 8.1)
where: Z8 = rX8) rA7+(B1-X8)+(C7•X83)108	 I	 + D - X	 1
Expired 0 2 (Z) = B2+(M2 • F) (Step 10.2)
Expired CO 2(y)= Bl+(M1 • C) (Step 12.2)
Inspired CO 2 (H) = B+(M•H1) (Step 16.1)
Inspired 0 2 (J) = B2+(M2 • J1) (Step 11.2)
VEATPS (W)	 [(V2-Vl)/T] (V3) (Step 20)
STPD FACTOR (U) = (P-P8)/760(1+0.00367G) (Step 20)
VESTPD (V) = W-U	 (Step 20)
1/ E
	(03) = [W-(R$-D$)] 10-49.7)-P8	 273+38 11	 (Step 20)
BTPS	 (273+G JJ
where: 49.7 = H2O vapor tension in expired air at T  of 38°C.
s.
RE (R) n (Y$)/ LKL100-( Y+Z)J-ZJ (Step ZO)
True 02 (X) - (Y=)/R 	(Step 20)
02
 uptake (0) n (V-X)/100 	 (Step 20)
CO2 production (C4) = R-0	 (Step 20)
The printout of a sample calculation is presented in Fig. 4.
A comparison was made between 22 measurements of oxygen uptake, that
ranged from 1.79 to 1 .50 k/min, calculated from the nomogram of Consolazio
et zl. (1) and from the computer program (Fig. 5). The mean (±SD) of the
nomogram values was 3.44 +0.89 R/min versus 3.42 +0.88 for the program data.
The correlation coefficient was 1.00.
REFEPENCES
1. Consolazio, C. F., R. E. Johnson, and L. J. Pecora. Physiological
Measurements of Metabolic Functions in Man. N.Y.: McGraw-Hill, 1963,
pp. 1-11.
2. Keenan, J. H., and F. G. Keyes. Thermodynamic Properties of Steam. N.Y.:
Wiley, 1963, p. 14.
3
FIG. 1.	 Flow diagram of program.
IS
 Q^A`1t^
of 
POC)Vt
7"y.-1P'
	
5.-	 J
a{	
=4 ¢f
++4;1 ,.	 rY^'s..#^'	raF 
x ..4 a^ x tt _	
k	 :^.	
.: ' w
{	
_	 h
5	 !THIS PROGRAM CALCULATES OXYGEN CONSUMPTION
7 PRINT
10 A9-"NO"
11 B--G.01400 87 !INTERCEPT FOR INSPIRED CO2 CURVE. SEE STATEMENT 830"
12 M= 0.00850467 !SLOPE FOR INSPIRED CO2 CURVE.
13 !
14 81--0.01066
	
!INTERCEPT FOR EXPIRED CO2 CURVE. SEE STATEMENT 670
15 M1= 0.03494	 !SLOPE FOR EXPIRED CO2 CURVE.
16 !
17 B2--0.002167 !INTERCEPT FOR INSPIRED AND EXPIRED 02 CURVE_
18 M2. 0.02501	 !SLOPE FOR INSPIRED AND EXPIRED 02 CURVE
20 PRINT "DO YOU NEED INSTRUCTIONS? TYPE YES OR 140:
25 INPUT IN IMAGE "#":I$
30 IF I$-A9 THEN 100 ELSE 35
35 PRINT
40 PRINT"THIS PROGRAM CALCULATES OXYGEN CONSUMPTION. IT CAN BE USED"
41 PRINT"WHEN EITHER OF TWO TYPES OF 02/CO2 ANALYZERS ARE AVAILABLE."
42 PRINT"THEY ARE: 1) DIRECT READOUT ANALYZERS (READINGS IN PERCENT OF"
43 PRINT"GAS COMPOSITION), AND 2) INDIRECT READOUT ANALYZERS (WHICH"
44 PRINT"REQUIRE USE OF A CALIBRATION CURVE)."
45 PRINT"iHE SLOPES AND INTERCEPTS OF THE CALIBRATION CURVES MUST BE"
46 PRINT"ENTERED INTO THIS PROGRAM AT STATEMENT NUMBERS 11 TO 1B."
47 PRINT
60 PRINT "WHEN REQUESTED TO TYPE (NO), DO NOT TYPE THE ENCLOSING ()"
62 PRINT
64 PRINT "TO INTERRUPT THE EXECUTION OF THIS PROGRAM AT ANY POINT,"
66 PRINT "DEPRESS THE ALT MODE/ESCAPE KEY SEVERAL TIMES."
70 PRINT"THE PRIMARY EQUATIONS USED IN THIS PROGRAM PLUS THEIR"
71 PRINT"ASSOCIATED MNEMONICS CAN BE FOUND IN STATEMENTS 580,"
72 PRINT"1000 THROUGH 1090, AND 1325."
75 PRINT
80 PRINT"DATA CAN BE ENTERED IN TWO WAYS: 1) NdN-CO% cRi,TIONALLY AS A"
81 PRINT"STRING OF VARIABLES IN A SPFCIFIEO FORMAT, OR 2)CONVER-"
82 PRINT"SATIONALLY, IN RESPONSE iU COMPUTER-GENERATED QUESTIONS."
83 PRINT"(CONVERSATIONAL? YES OR NO) GIVES YOU THE CHOICE OF HOW YOU"
84 PRINT"WANT TO INPUT THE DATA."
85 PRINT
100 PRINT
120 PRINT"CONVERSATIONAL? TYPE YES OR NO:
122 INPUT IN IMAGE "#":C9
123 PRINT
124 IF C9-A9 THEN 126 ELSE 200
126 PRINT "DO YOU NEED THE INPUT FORMAT? TYPE YES OR NO:
127 INPUT IN IMAGE "#":F8
128 IF F8-A9 THEN 158 ELSE 129
125 PRINT
130 PRINT"INSTRUCTIONS FOR ENTERING DATA ARE:"
131 PRINT
132 PRINT"	 1) SEPARATE EACH VARIABLE WITH A COMMA"
133 PRINT"	 2) PUSH THE LINE FEED KEY IF THE RIGHT-HAND EDGE OF THE"
134 PRINT"	 PAPER IS REACHED BEFORE ALL VARIABLES ARE ENTERED"
135 PRINT"	 3) TYPE (NO) IF BODY WT., ERGOMETER LOAD, OR TREADMILL"
136 PRINT"	 SPEED ARE NOT MEASURED."
138 PRINT
139 PRINT "THE FORMAT FOR ENTERING DATA IS AS FOLLOWS:"
140 PRINT
141 PRINT"	 COLUMN 1	 COLUMN 2"
143 PRINT" D = DATE (ENCLOSE IN QUOTES) V1 = VOL. METER READ. INITIAL (L)"
144 PRINT"S$ = SUBJECT'S NAME
	 V3 = VOL. METER CORRECTION"
146 PRINT"W$ = BODY WT. (KG)
	 D$ - RESP. VALVE DEAD SPACE (L)"
148 PRINT"E$ = ERGOMETER LOAD (WATTS)
	 G - GAS TEMPERATURE (CELSIUS)"
150 PRINT"T$ = TREADMILL SPEED (MPH) P - BAROMETRIC PRESS. (MM HG)"
152 PRINT" S = TIME, GAS COLLECT. (SEC) R$ = RESPIRATORY RATE (BR/MIN)"
154 PRINT"V2 = VOL. METER READ. FINAL (L)"
158 PRINT
160 PRINT"ENTER THE COLUMN 1 VARIABLES FIRST"
162 INPUT D,S$,W$,E$,T$,S,V2,V1,V3,D$,G,P,R$
164 PRINT
E %S0010()^ ^QU A^^^Y
OF P
FIG. 2. Printout of complete program.
^	 d
166 PRINT
170 PRINT "DATE n";D
171 PRINT
C1 2 PRINT "SUBJECT n ";S$
1?3 PRINT
174 PRINT "BODY WEIGHT (KG)	 W$" ":W$
175 PRINT "ERGOMETER LOAD (WATTS) E$" ":E$
176 PRINT "1READMILL SPEED (MPH) 	 T$• ":T$
177 PRINT
178 PRINT "TIME. GAS COLLECTION (SECONDS) 	 Sn ":S;"SECONDS"
179 PRINT "RESP. GAS METER BREADING, FINAL 	 V2-":V2;%ITERS"
180 PRINT "RESP. GAS METER READING, INITIAL 	 V1=":V1;"LITERS"
181 PRINT "RESP. GAS METER CORRECTION 	 V3-":V3;"LITERS"
182 PRINT "RESP. VALVE DEAD SPACE.	 D$-":D$;"LITERS"
183 PRINT "GAS TEMPERATURE	 G-":G;"CELSIUS"
185 PRINT "BAROMETRIC PRESSURE 	 P-":P;"MM HG"
186 PRINT "RESPIRATION RATE	 R$n ":R$;"BR/MIN"
189 GO TO 500
200 PRINT "DATE (FORMAT = MONTH DAY, YEAR):%
210 INPUT IN IMAGE "#":D
215 PRINT
220 PRINT "SUBJECT'S NAME:%
230 INPUT IN IMAGE "#":S$
250 PRINT
260 PRINT "BODY WT. (KG) (TYPE (NO) IF NOT MEASURED) WS n
270 INPUT IN IMAGE "#":W$
280 PRINT "ERGOMETER LOAD, (WATTS) (TYPE (NO) IF NOT MEASURED):
290 INPUT IN IMAGE "#":E$
300 PRINT "TREADMILL SPEED, (MPH) (TYPE (NO) IF NOT MEASURED):
310 INPUT IN IMAGE "#":T$
.320 PRINT
330 PRINT "TIME, GAS COLLECTION (SEC.)	 S.
340 INPUT IN IMAGE "#":S
350 PRINT "RESP. GAS METER READ., FINAL (LITERS) 	 V2=
360 INPUT IN IMAGE "#":V2
370 PRINT "RESP. GAS METER READ., INITIAL (LITERS) V1=
380 INPUT IN IMAGE "#":V1
390 PRINT "RESP. GAS METER CORRECTION 	 V3=
400 INPUT IN IMAGE "#":V3
410 PRINT "RESP. VALVE DEAD SPACE 	 DS=
420 INPUT IN IMAGE "#":D$
430 PRINT "GAS TEMPERATURE (CELSIUS) 	 G=
440 INPUT IN IMAGE "#":G
460 PRINT "BAROMETRIC PRESSURE (MM HG) 	 P=
470 INPUT IN IMAGE "#":P
480 PRINT "RESPIRATORY RATE (BR/MIN) 	 R$=
490 INPUT IN IMAGE "#":R$
500 A7=3.2437814
510 B7=5.86826E-03
520 C7=1.1702379E-08
530 D7=2.1878462E-03
540 P1=218.167
550 TH=G+273.16
560 X8=647.27-T8
570 Z8-(X8/T8)*((A7+B7*X8+C7*X8t3)/(1+D1*X8))
560 PH=(P7/10!Z8)*760	 !P8=PH20 SATURATED AT DBT
600 PRINT "WATER VAPOR PRESSURE 	 P8=":P8:" MM HG"
605 PRINT
630 PRINT "EXPIRED CO2, AS %, FROM DIRECT READOUT ANALYZER"
631 PRINT "	 (TYPE (NO) IF NOT MEASURED) 	 FCO2	 Y-
650 INPUT IN IMA!;E "#":Y
660 IF Y=A9 THEN 610 ELSE 690
670 PRINT "EXPIRED CO2 (READING FROM INDIRECT READOUT ANALYZER) C=
680 INPUT IN TMAr^ E "#":C
685 Y=81+(M1*C)	 !FCO2 (%)
690 PRINT "EXPIRED 02, AS %, FROM DIRECT READOUT ANALYZER"
691 PRINT "	 (TYPE (NO) IF NOT MEASURED) 	 F02	 Z=
Fig. 2.- Continued
6
f ^^
^d9
0
t
3
l
1
1 N LA^a
700 INPUT IN IMAGE "I":Z
710 IF Z=A9 THEN 720 ELSE 745
720 PRINT "EXPIRED 02 (READING FROM INDIRECT READOUT ANALYZER) 	 Fn
730 INPUT IN IMAGE "N":F
740 Z-82+(M2*F)	 IF02 (%)
745 PRINT
750 PRINT "WERE INSPIRED CO2 AID 02 MEASURED? TYPE YES 6R NO:
755 INPUT IN IMAGE "#":N
757 PRINT
760 IF N-A9 THEN 770 ELSE 800
770 H-0.03
780 J=20.93
795 GO TO 919
800 PRINT "INSPIRED CO2, AS %, FROM DIRECT READOUT ANALYZER"
801 PRINT "	 (TYPE (NO) IF NOT MEASURED)	 Hn
810 INPUT IN IMAGE "/":H
820 IF +A9 THEN 830 ELSE 860
830 PRINT "INSPIRED CO2 (READING FROM INDIRECT READOUT ANALYZER) 	 H1-
840 INPUT IN IMAGE "N"-.H1
850 8=8+(M*Hl)
860 PRINT "INSPIRED 02, AS %, FRW DIRECT READOUT ANALYZER"
861 PRINT "	 TYPE (NO) IF NOT MEASURED)	 J.
870 INPUT IN IMAGE "N":J
880 IF J=A9 THEN 890 ELSE 918
890 PRINT "INSPIRED 02 (READING FROM INDIRECT P rADOUT ANALYZER)	 J1=
900 INPUT IN IMAGE "N":J1
910 J=B2+(M2*J1)
918 PRINT
919 Q="%%%%%%%%%%%%%%%% %%.%%% %"
920 PRINT IN IMAGE Q:"INSPIRED CO2 	 H-":H:"%"
930 PRINT	 "INSPIRED 02	 J-":J:"%"
940 PRINT "EXPIRED CO2
	
Y-":Y:"%"
950 PRINT "EXPIRED 02 	 Z=":Z:"%"
1000 K=J/(100-(J+H))	 !INSPIRED 02/N2
1005 T=S/60
1010 YE=Y-H	 !EXPIRED CO2 MINDS INS.IRED CO2
1020 W=(V2-V1)/T*V3
	
!VE ATPS (L/MIN)
1030 U = (P-P8)/(760*(1+0.00367*G))	 !STPD FACTOR
1040 V=W*U
	 !VE STPD (L/MIN)
1050 03=(W- (R5*DE)) *(((P-P8)/(P-49.7))*(273+38)/(273+G))	 !VE BTPS (L/MIN)
1060 R=YE/((100-(Y+Z))*K-Z)
	 !RE
1070 X=Y3/R	 !TRUE 02 (%)
1080 0 = (V*X)/100
	 !OXYGEN UPTAKE (L/MIN)
1090 C4=R*O
	 !CO2 PRODUCTION (L/MIN)
1120 PRINT f1rJ
1200 PRINT "TIME	 =";T;"MINUTES" Q 
pG	 .^(
1210 PRINT "VE ATPS
	 =";W;"L/MIN"
1220 PRINT "STPD FACTOR =%U
	
OR^G,^	 QV
1240 PRINT "VE BTPS	 =";03;%/MIN"
	
Of Q^GIR
1250 PRINT 7CO2 MINUS INSPIRED CO2 = ";Y$: "%"
1260 PRINT "F02	 =";Z:"%"
1270 PRINT "RE
	 =";R
1280 PRINT "TRUE 02	 -";X:"%"
1290 PRINT "CO2 PRODUCTION -";C4;"LITERS PER MINUTE"
1300 PRINT
1310 PRINT "OXYGEN UPTAKE = ";O;"LITERS PER MINUTE"
1320 IF WE=A9 THEN 1398
1325 01 = (0*1000) /WE 	!OXYGEN UPTAKE (ML/KG/MIN)
1330 PRINT "OXYGEN UPTAKE =";01;"ML/K6/MIN"
1398 PRINT
1400 PRINT "ARE YOU FINISHED?	 TYPE YES OR N0:
1410 INPUT IN IMAGE "M":F9
1415 PRINT
1420 IF F9-A9 THEN 120 ELSE 1440
1440 END
Fig. 2.- Concluded
s - *!
SYMBOLS AND CONSTANTS USED IN 0 2/UPTAKE PROGRAM
Symbol	 Statement No.
A7 Water Vapor Pressure Constant (3.2437814) 500
A9 "No° 10
B Intercept for inspired CO2 Curve 11
B1 Intercept for Expired CO2 Curve 14
82 Intercept for Inspired E Expired 02 Curve 17
P7 Water Vapor Pressure Constant (5.86826X10' 3 ) 510
C Expired COp Reading from Indirect Readout Analyzer 670, 680
C4 CO2 Production (L/Min) 1090
C7 Water Vapor Pressure Constant 	 (1.1702379X10' 8 ) 520
C9 Prompt for Conversational Mode of Input 120,122
D
D7
Date
Water Vapor Pressure Constant (2.1878462X10 -3 )
162,
530
200, 210
DS Respiratory Valve Dead Space (LITERS) 162, 410, 420
ES Ergometer Load (Watts) 162, 280, 290
F Expired 02 Reading from Indirect Readout Analyzer 720, 730
F8 Branch in Program for Format Instructions 126, 127
F9 Branch in Program for Exiting 1400,1410
G Gas Temperature (CELSIUS) 162, 430, 440
H Inspired CO2, Constant or Direct Reading (%) 770, 801, 810
H1 Inspired CO2 Reading from Indirect Readout
Analyzer 830, 840
I$ Branch in Program for General	 Instructions 20, 25
J Inspired 02, Constant or Direct Reading 780, 861, 870
J1 Inspired 02
 Reading from Indirect Readout Analyzer 890, 900
K Inspired 02/N2 (%) 1000
M Slope for Inspired CO2 Curve 12
M1 Slope for Expired CO2 Curve 15
M2 Slope for Inspired and Expired 0 	 Curve 18
R Branch in Program for Inspired Air Measurements 750, 755
0 Oxygen Uptake (L/Min) 1080
01 Oxygen Uptake	 ML/KG/Min) 1325
03 VE BTPS (L/MIN) 1050
P Barometric Pressure (TORR) 162, 460, 470
P7 Water Vapor Pressure Constant (218.167
	 INT. ATM) 540
P8 Water Vapor Pressure (INT. ATMOSPHERES) 580
Q Pr-nt in Image Statement 913
k RE 1060
R$ Respiratory Rate (BREATHS/MIN) 162, 480, 490
5 Time (Seconds) 162, 330, 340
S$ Subject's Name 162, 220, 230
T Time (Minutes) 1005
T8 Gas Temperature,	 KELVIN (G,	 °C a	 273.16) 550
T$ Treadmill	 Speed 162, 300, 310
U STPD Factor 1030
V VE STPD (L/MIN) 1040
V1 Respiratory Gas Meter Reading,
	 Initial	 (LITERS) 162, 370, 380
V2 Respiratory Gas Meter Readinq, Final
	 (LITERS) 162, 350, 360
V3 Respiratory Gas Meter Correction (LITERS) 162, 390, 400
W VE ATPS (L/MIN) 1020
WS Body Weight (kg) 162, 260, 270
X True 02	 (%) 1070
X8 647.27-T8 560
Y Expired CO2 from Direct Readout Analyzer ( . j 631, 650
Y$ Net CO2	 (") 1010
Z Expired 02 from Direct Readout Analyzer () 591, 700
Z8 LOG10 P7/P8 570
FIG. 3. Symbols and constants used in the program.
ENTER THE COLUMN 1 VARIABLES FIRST
? " 3/30/77",SUBJECT,66.42,175,NO,60,76.5,0,1.666,0,27.3,765.3,40
DATE ° 3/30/77
SUBJECT =
BODY WEIGHT (KG)	 W$= 66.42
ERGOMETER LOAD (WATTS) E$ = 175
TREADMILL SPEED (MPH) T$ = NO
TIME, GAS COLLECTION (SECONDS) 	 S- 69 SECONDS
RESP. GAS METER READING, FINAL
	 V2= 76.5 LITERS
RESP. GAS METER READING, INITIAL
	 Vl- 0	 LITERS
RESP. GAS METER CORRECTION 	 V3= 1.066	 LITERS
RESP. VALVE DEAD SPACE	 DE= 0	 LITERS
GAS TEMPERATURE
	 G= 27.3 CELSIUS
BAROMETRIC PRESSURE	 P= 765.3	 MM HG
RESPIRATION RATE	 R$= 40 BR/MIN
WATER VAPOR PRESSURE	 P8= 27.208617 MM HG
EXPIRED CO2, AS %, FROM DIRECT READOUT ANALYZER
(TYPE (NO) IF NOT MEASURED)
	 FCO2	 Y= 3.99
EXPIRED 02, AS %, FROM DIRECT READOUT ANALYZER
(TYPE (NO) IF NOT MEASURED)
	 F02	 Z= NO
EXPIRED 02 (READING FROM INDIRECT READOUT ANALYZER) F= 657
WERE INSPIRED CO2 AND 02 MEASURED? TYPE YES OR NO: NO
INSPIRED CO2 H=	
.939 %
INSPIRED 02 J= 29.93%
EXPIRED CO2	 Y= 3.99%
EXPIRED 02	 Z- 16.429403%
TIME
	 =	 1	 MINUTES
VE ATPS	 =	 81.549 L/MIN
STPD FACTOR =
	 .88273116
VE STPD
	 =	 71.985843 L/MIN
VE BTPS
	 -	 87.109995 L/MIN
FCO2 MIMUS INSPIRED CO2 =
	 3.96%
F02	 = 16.42940%
RE	
_	 .85275936
TRUE 02	 = 4.6437485%
CO2 PRODUCTION = 	 2.8596394 LITERS PER MINUTE
OXYGEN UPTAKE =
	 3.3428415 LITERS PER MINUTE
OXYGEN UPTAKE =
	 59.328839 ML/KG/MIN
ARE YOU FINISHED? TYPE YES OR NO:
pGE o5
^R
FIG. 4. Sample printout Lf 0 2 uptake computation.
s
.,	 a
,
+	 : r fr A	 ,
7
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C	 1	 2	 3	 4	 5	 6	 7
OXYGEN UPTAKE, L/min (NOMOGRAPH METHOD)
F1,;. S. Comparison of oxygen uptake calculated with the computer
program and the nomograph method.


Computer program for calculation of oxygen uptake

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