Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Square area of the oesophageal lumen with TWT (in mm2)
| Children’s age (weight according to our experience) | Square area of the oesophageal lumen with TWT (A = nr2; multiplication) in mm2 | ||
|---|---|---|---|
| Oesophagus upper level | Oesophagus lower level | ||
| 0–3 years (3–18 kg) | Calculations for 3 kg | 3.14 and (3.5* + 4.2**)2= 186,17*** | 3.14 and (4.4 + 4.2)2= 232.23 |
| Calculations for 18 kg | 3.14 and (4.55 + 4.2)2= 240.4 | 3.14 and (5.45 + 4.2)2= 292.4 | |
| Above 3–6 years (13–29 kg) | Calculations for 13 kg | 3.14 and (4.2 + 4.2)2= 221.56 | 3.14 and (5.1 + 4.2)2= 271.58 |
| Calculations for 29 kg | 3.14 and (5.35 + 4.2)2= 286.38 | 3.14 and (6.25 + 4.2)2= 342.89 | |
| Above 6–13 years (18–66 kg) | Calculations for 18 kg | 3.14 and (4.55 + 4.2)2= 240.41 | 3.14 and (5.45 + 4.2)2= 292.4 |
| Calculations for 66 kg | 3.14 and (7.9 + 4.2)2 = 459.73 | 3.14 and (8.9 + 4.2)2= 538.85 | |
| Above 13 years (39–70 kg) | Calculations for 39 kg | 3.14 and (6.05 + 4.2)2= 329.9 | 3.14 and (6.95 + 4.2)2= 390.37 |
| Calculations for 70 kg | 3.14 and (8.2 + 4.2)2 = 482.8 | 3.14 and (9.2 + 4.2)2= 563.82 | |
TWTa calculated (mm2) at Th3-Th7 according to children’s age
| Children’s age (weight) | Square area of the TWT ring area (in mm2) | ||
|---|---|---|---|
| Oesophagus at the 3rd Th vertebral level | Oesophagus at the 7th Th vertebral level | ||
| 0–3 years (3–18 kg) | Calculations for 3 kg | 147.71* | 171,44 |
| Calculations for 18 kg | 175.39 | 199.13 | |
| Above 3–6 years (13–29 kg) | Calculations for 13 kg | 166.17 | 189.91 |
| Calculations for 29 kg | 196.51 | 220.23 | |
| Above 6–13 years (18–66 kg) | Calculations for 18 kg | 175.39 | 199.13 |
| Calculations for 66 kg | 263.76 | 290.13 | |
| Above 13 years (39–70 kg) | Calculations for 39 kg | 214.97 | 238.7 |
| Calculations for 70 kg | 271.67 | 297.85 | |
Square area of the oesophageal lumen calculated according the formula πr2 (in mm2)
| Children’s age (weight according to our experience) | Square area of the oesophageal lumen (A = πr2; multiplication) in mm2 | ||
|---|---|---|---|
| Oesophagus at the 3rd Th vertebral level | Oesophagus at the 7th Th vertebral level | ||
| 0–3 years (3–18 kg) | Calculations for 3 kg | 3.14 and 3.5*2= 38.46 | 3.14 and 4.42= 60.79 |
| Calculations for 18 kg | 3.14 and 4.552= 65.01 | 3,14 and 5.452 = 93.27 | |
| Above 3–6 years (13–29 kg) | Calculations for 13 kg | 3.14 and 4.22 = 55.39 | 3.14 and 5.12= 81.67 |
| Calculations for 29 kg | 3.14 and 5.352 = 89.87 | 3.14 and 6.252= 122.66 | |
| Above 6–13 years (18–66 kg) | Calculations for 18 kg | 3.14 and 4.552= 65.01 | 3.14 and 5.452 = 93.27 |
| Calculations for 66 kg | 3.14 and 7.92= 195.97 | 3.14 and 8.92= 248.72 | |
| Above 13 years (39–70 kg) | Calculations for 39 kg | 3.14 and 6.052= 114.93 | 3.14 and 6.952= 151.67 |
| Calculations for 70 kg | 3.14 and 8.22= 211.13 | 3.14 and 9.22= 265.77 | |