What is the basic principle involved in measurement of pO2 measurement?

Test Principle: The IVD-GE02 System measures the analytes pH, pCO2, pO2, potassium and glucose using electrochemical sensors, based on potentiometric and amperometric phenomenon. The sensors produce electrical signals in response to the analytes in the blood. This measurement technique is used for pO2 and Glucose.

What is pH pO2 and pCO2?

Arterial Blood Gas analysis typically measures: pH (Acidity) pCO2 (Partial Pressure of Carbon Dioxide) pO2 (Partial Pressure of Oxygen)

What is the electrode used for pCO2?

Severinghaus electrode
The Severinghaus electrode is an electrode that measures carbon dioxide (CO2). It was developed by Dr. John W.

What is the use of measurement of pH pCO2 pO2?

PO2, PCO2 and pH were measured continuously to check the performance of the heart-lung machine, and to evaluate the therapeutic and diagnostic significance of these blood gas values during cardiac surgery.

Is the pH change dependent on the PCO 2?

The change in pH is completely dependent on the pCO 2, provided the temperature and pressure remain constant: This results in a change in potential difference in the glass electrode; and the function of this item has already been discussed at some length in another chapter.

What is the measuring principle of a PCO2 surface electrode?

Measuring principle and circuit diagram of the PCO2 electrode. The electrode is symbolized by two wires in the water bath. R~ is the high-ohmic resistance connected in series to R~, the electrode resistance, which is changed by PCO2 ” Ue is the alternating voltage source; u,, the voltage signal of the electrode … PCO 2 surface electrode.

How is co 2 measured from an electrode?

The reaction changes the pH in the electrode, which corresponds to a change in potential difference, and this is measured. The CO 2 is then inferred from the change in pH. The recollections of John Severinghaus are not available to most people, as they are locked behind paywalls.

How does the pH of a glass electrode change?

Eglass electrode= ’ + RT/2.303Flog a(H3O+) (4) Where E’ represents the sum of the constant offset poten- tials of the inner glass surface/solution and the two Ag/AgCl electrodes. At 30°C the potential of the glass membrane changes by about 60 mV for each one unit of pH (i.e., a ten- fold activity change).