Comprasion of the blood gas values of patients who admitted emergency medicine service with dypsnea to blood gas values measured BY noninvasive method

We aimed to determine the suitability of non-invasive blood gas measurement for clinical use by comparing the results of invasive (arterial) and non-invasive (transcutaneous) blood gases in patients with dyspnea in our study. In our study, 234 patients were included who referred to emergency services due to dyspnea and whose arterial blood gas were measured. Tensor Type MTX-Matrix device was used to measure patients' fingertip sPO2, PO2, PCO2 and pH values and these values were compared with arterial blood gases. Kolmogorov Smirnov test was used to test the normal distribution of continuous data. The Mann Whitney-U test was used to compare groups.The Bland Altman test was used to test the compatibilitiy of invasive (arterial) and non-invasive (transcutaneous) blood gas results. The results were evaluated in a confidence interval of 95% and a significance level of p <0.05. The mean age of 234 patients in our study was 69.0 ± 18.1 years and 42.7% of the patients were male. The most frequent symptom except for dyspnea was chest pain, the most common diagnosis was pneumonia. It was determined that transcutaneous pH could be used instead of pH measured in arterial blood gas (ABG) (p> 0.05). It was found that, transcutaneous PCO2, PO2 and sPO2 could not be used instead ofPCO2, PO2 and sPO2level measured in ABG(p <0.05). While in the presence of additional symptoms and in non- lung / cardiac pathologies, transcutaneous pH and pO2 were used instead of pH and pO2 in ABG (p> 0.05), it was found that transcutaneous PCO2 and sPO2 could not be used instead ofPCO2 and sPO2 in ABG (p> 0.05). In patients with lung pathology, cardiac pathology and infection; while transcutaneous pH could be used in place of the pH in AKG (p> 0.05); transcutaneous PO2, PCO2 and sPO2 could not be used instead of arterial PO2, PCO2 and sPO2 (p <0.05). As a result, devices that evaluate blood gas parameters as transcutaneously can be used instead of pH in dyspneic patients. For the evaluation of all blood gas parameters, the device needs to be improved. Key words: sPO2, PO2, PCO2, pH, Blood Gas