Article Figures & Data
Figures
- Figure 1
- Relationship between endotracheal tube cuff volume and subglottic transverse diameter measured by ultrasound
Tables
Variables Group I (n=42) Group II (n=43) Group III (n=42) P-values Gender Male 27 (64.3) 24 (55.8) 30 (71.4) 0.325* Female 15 (35.7) 19 (44.2) 12 (28.6) Age (month) 52.0±11.7 88.8±17.1 114.4±18.4 <0.001† Weight (kg) 17.8±3.8 26.2±5.2 37.0±9.1 <0.001† BMI (kg/m2) 15.6±2.9 16.6±2.7 18.8±3.6 <0.001† ASA I 31 (73.8) 39 (90.7) 32 (76.2) 0.105* II 11 (26.2) 4 (9.3) 10 (23.8) Variables β SE 95% CI P-value* Constant -0.191 0.229 -0.645, -0.264 0.406 Height (m) 1.027 0.305 0.421-1.634 0.001 Subglottic transverse diameter measured by USG (mm) 0.104 0.045 0.014-0.193 0.023 CI: confidence interval, β: beta coefficient, SE: standard error, USG: ultrasonography
↵* Linear regression (R2)=0.50 (p<0.05), F (2, 87)= 111.288 (p<0.05).
- Table 3
- Correlation of the endotracheal tube cuff volume predicted by the regression model with the actual volume in the validation group (n=37).
Parameter Predicted volume for testing r P-value* ETT cuff volume 0.586 <0.001 ↵* Pearson correlation test (R2=0.343). ETT: endotracheal tube, r: correlation coefficient
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