ITC Avoximeter 1000E Whole Blood Oximeter - Manual (Page 9)

ITC AVOXimeter 1000E Operator’s Manual
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Note: Oxygen uptake rate can either be measured from expired gases, or it can be
estimated from the patient’s age, height, weight, and sex (see below).
Body Surface Area
m 2
= 0.007185 (Weight kg) 0.425 (Height cm) 0.725
Oxygen Uptake
males
ml/min
= 157.3 BSA + 10– (10.5 * age + 4.8)
Oxygen Uptake
females
ml/min
= 157.3 x BSA – (10.5 * age + 4.8)
Cardiac Output Cardiac Index
L/min/ m 2 =
BSA
Cardiac Output
Stroke Volume
ml/beat
=
Heart rate
Stroke Volume
Stroke Index
ml/beat/m 2
=
BSA
Oxygen Uptake Pulmonary
Blood Flow
ml/min
=
[0
2
]
Pulmonary Arterial
– [0
2
]
pulmonary venous
Arterial Pressure – Right Atrial Pressure
Total Systemic
Resistance
mmHg/ml/min
=
Cardiac Output
Pulmonary Arterial Pressure – Left Atrial Pressure
Total Pulmonary
Resistance
mmHg/ml/min
=
Cardiac Output
Pulmonary Flow Pulmonary to
Systemic Flow Ratio
=
Systemic Flow
%Hb0
2 Arterial
– %Hb0
2 Venous Pulmonary to
Systemic Flow Ratio
=
%Hb0
2 Pulmonary Venous
– %Hb0
2 Pulmonary Arterial
Saturation Step-Ups
Saturation step-ups are the differences in oxyhemoglobin saturation [%Hb02] between adjacent
anatomical sites. These values are used as an aid in diagnosing intracardiac and great vessel
shunts. The ITC AVOXimeter 1000E calculates saturation step-ups between the following
anatomical sites:
● Right atrium and superior vena cava
● Right ventricle and right atrium
● Pulmonary artery and right ventricle