The maintenance of blood gas analyzer

Blood gas analyzer function is so perfect, are all derived from gas analyzer and electrolyte analyzer credit. In essence is basically the same kind of medical apparatus and instruments, but said the blood gas analyzer more advanced.

The instrument adopts the ion selective electrode method to realize the accurate detection, the apparatus has six kind of electrode: sodium, potassium and chlorine, calcium ion, lithium and reference electrode, each electrode has a ion selective membrane, and the measured samples corresponding ion produce reaction, film is a ion exchanger, and ionic charge reaction and changed the membrane potential, can test fluid, sample and membrane between the potential. On both sides of the membrane were detected two electric potential difference value can produce current, sample, reference electrode, reference electrode liquid constitute a "loop" side, film, internal electrode liquid, internal electric is the other side.

Internal electrode liquid samples and the ion concentration difference between in the working electrode membrane on both sides produce electrochemical voltage, voltage through the high conductivity of internal electrode lead to amplifier, reference electrode also leads to amplifier site, through the detection of a known precisely ion concentration of the standard solution for calibration curve, thereby testing sample of ion concentration.

Solution measured ion contact electrode, in ion selective electrode substrate occurred within the aquifer ion migration and migration of the ions charge change there are potential, thus making membrane surface between the potential changes, when measuring electrode and reference electrode generation between a potential difference.
Therefore blood gas analyzers, electrolyte analyzer and blood gas analyzer in the maintenance of the method also basic consistent, to ensure that three kinds of medical apparatus and instruments according to specifications for routine maintenance.

First, from the serum separation test tube directly suction sample analysis, but suction sample, be careful not to suction setting blood clot, in order to avoid pipeline.

Second, not merchant quality-control serum are suitable for ion electrodes method of measurement, some manufacturers quality-control serum contains more additives, often interference ion method measurement.

Third, instrument suction sample process can't suction bubble, otherwise it will cause the reliable.

Fourth, do not use happen mildew and turbidity crusted solution, once found solution metamorphic should abandon go, lest affect the results of the analysis.

Fifth, combined with clinical response, users should appropriate consideration factors that may influence the results, because drug use or internal matter has uncertain conflict influence. The laboratory and clinical doctors must according to the patient's clinical manifestations of the results are estimated.

Sixth, each only electrode are printed with number, please pay attention to protect, to can't recognize any number of electrode will not admit quality guarantee.

Seventh, if the variation of ambient temperature is more than 10 degrees, is a must to correction.

Eighth, standard solution and sample pH value keep in 6 ~ 9 between, otherwise you will interfere with sodium content determination.

Above is the blood gas analyzers, electrolyte analyzer and blood gas analyzer in the use process need to be paid attention to matters.