Background: Arterial oxygen (PaO2) and carbon dioxide gas partial pressure (PaCO2) conditions due to many causes of respiratory diseases are very important to the respiratory patients. But in practice, usually on admission of the patients, many clinicians tend to omit blood gas analysis, because this is an invasive, painful, expensive examination and not essential for the adaptation of medical insurance on the treatment of respiratory patients. So, we used a percutaneous carbon dioxide partial pressure (PtcCO2) analysis meter (TOSCAÔ) and measured PtcCO2 of respiratory patients and compared these results with the conventional blood gas meter.
Objectives: Forty of our respiratory patients who admitted to our clinic because of symptoms. Ten chronic obstructive pulmonary disease, ten pneumonia, ten interstitial pneumonia, ten lung cancer patients were enrolled. We gave them the informed concents and measured PtcCO2 and PaCO2.
Methods: The ear probe of TOSCAÔ was put on the patient‘s ear pad. Five minutes after, we checked their respirations and if they were stabilized, PtcCO2 measurements have started. The PtcCO2, percutaneous O2 saturation (SpO2) and pulse rate on the display were checked and recorded. Then we measured PaCO2.
Results: The correlation between all PtcCO2 and PaCO2 was R2=0.97. If we mentioned full and detail, chronic obstructive pulmonary disease (R2=0.97), pneumonia (R2=0.99), interstitial pneumonia (R2=0.95), lung cancer (R2=0.86) and all data had significant correlations.
Conclusion: The measurement of PtcCO2 by the TOSCAÔ is non-invasive and provides very useful informations on the patient‘s respiratory conditions before the treatment of diseases.