Table 4-1.
The French Catheter Scale Equivalents*
| Size | ||
|---|---|---|
| Scale | Millimeters | Inches |
| 3 | 1 | 0.039 |
| 4 | 1.35 | 0.053 |
| 5 | 1.67 | 0.066 |
| 6 | 2 | 0.079 |
| 7 | 2.3 | 0.092 |
| 8 | 2.7 | 0.105 |
| 9 | 3 | 0.118 |
| 10 | 3.3 | 0.131 |
| 11 | 3.7 | 0.144 |
| 12 | 4 | 0.158 |
| 13 | 4.3 | 0.170 |
| 14 | 4.7 | 0.184 |
| 15 | 5 | 0.197 |
| 16 | 5.3 | 0.210 |
| 17 | 5.7 | 0.223 |
| 18 | 6 | 0.236 |
| 19 | 6.3 | 0.249 |
| 20 | 6.7 | 0.263 |
| 22 | 7.3 | 0.288 |
| 24 | 8 | 0.315 |
| 26 | 8.7 | 0.341 |
| 28 | 9.3 | 0.367 |
| 30 | 10 | 0.393 |
| 32 | 10.7 | 0.419 |
| 34 | 11.3 | 0.445 |
*
Multiple types of pediatric polyurethane nasogastric feeding tubes are available in sizes ranging from 8F to 12F that easily accommodate administration of liquids medications and fluids to kittens, cats, and small dogs.