Results
Sixty patients participated in the study. Of the patients, 29 were in nCPAP+Oxygen group and 31 were in the Oxygen group. There was not any serious complication reported during the procedure in both of groups. Of 60 patients, 3 patients had minör hemorrhage. Two of them were in nCPAP+Oxygen group and one was in the Oxygen group. Snoring was detected during the procedure in 22 patients in the Oxygen group while in 11 people in the nCPAP group (p=0,01). Electrocardiograms and arterial blood pressure levels of all patients were in normal limits. There were no significant differences in terms of age, sex, smoking history and presence of additional diseases in two groups. Neck circumference, BMI and STOP BANG questionnaire values ​​were similar. The Mallampati index was significantly higher in the nCPAP+Oxygen group (p=0,048). Comorbidities were chronic obstructive pulmonary disease (COPD), hypertension and malignancy. The clinical characteristics of the patients are shown in Table 2.
During the EBUS-TBNA procedure; there were no significant differences between the mean values of initial, final and the lowest Oxygen saturations; and propofol, fentanyl and midazolam doses of two groups. The mean procedure time and the practitioner satisfaction were similar in both groups. The mean desaturation time during the procedure was significantly lower in the nCPAP+Oxygen group (p=0,019). High Mallampati index was significantly assocciated with the duration of desaturation and the lowest Oxygen saturation (p=0,006, p=0,006, respectively) in Oxygen group while there was no association in CPAP+Oxygen group. Data about Oxygen saturation and the anesthetic drugs are shown in Table 3.
Oxygen saturation decreased to below 80% in 19 patients (61%) of the oxygen group (Figure 1), while in 10 patients (34,5%) of the nCPAP+oxygen group (Figure 2) (p = 0,034).