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The process of selecting the most appropriate size of the catheter. Derived in accordance with Matjaz et al. [78] and Vaishali et al. [79].
| Patients age group | The proposed size of the catheter (mm) |
|---|---|
| Younger than 12 months | In the range of 2–3 |
| 1–6 years | In the range of 3–4 |
| 6–10 years | Exactly 4 |
| Older than 10 years | In the range of 4–5 |
