OPTi CCA-TS2 - PO (Dry Sensor - B-Lac Cassette); PO 2 (Dry Sensor - B-Lac Cassette)

Operator’s Manual – OPTI CCA-TS2 PO2-B-1
ANALYTES PO
2
(Dry Sensor)
PO
2
(Dry Sensor - B-Lac Cassette)
Clinical Signicance
1
The PO
2
value of arterial blood is used to assess how well the body is able to absorb oxygen in the lungs.
Values below the normal arterial PO
2
(arterialhypoxemia) are usually caused by pulmonary, circulatory,
or respiratory abnormalities (e.g. bronchial obstruction, vascular problems, decrease in cardiac output,
increased oxygen demand, anatomical heart defect, low inspired O
2
content). Generally, O
2
levels
above 100 mmHg do not contribute signicantly to the oxygen content since, with normal hemoglobin
concentrations, 80 - 100 mmHg, PO
2
provides a 97% saturation level, and a level greater than 100%
cannot be achieved.
Measurement Principle
The PO
2
optode measurement principle is based upon luminescence quenching, rst documented in the
1930’s
2
, and commercially utilized to measure blood PO
2
in 1983
3
. The relationship of luminescence to
PO
2
is quantied by the Stern-Volmer equation,
I
0
/ I = 1 + kP
which describes how the uorescence emission intensity “I” is reduced as the PO
2
“P”, is increased.
Unlike conventional electrochemical “Clark” PO
2
electrodes, the oxygen optode does not consume
oxygen molecules during the measurement.
The PO
2
partial pressure is inuenced by the local barometric pressure, as dictated by Dalton’s law.
The OPTI CCA-TS2 incorporates a pressure transducer, which accurately tracks the local barometric
pressure and automatically compensates for it. The OPTI CCA-TS2 has been factory-calibrated to the
absolute barometric pressure.
Measurement Range
Range Resolution (Low/High) Units
10 to 700 1/0.1 mmHg
1.33 to 93.31 0.1/0.01 kPa
Standard Reference Cassette (SRC) Limit Values
LOW NORMAL HIGH Units
60.0 ± 3.0 100.0 ± 3.0 170.0 ± 3.0 mmHg
8.00 ± 0.40 13.33 ± 0.40 22.66 ± 0.40 kPa