[ Engineering Data - French Catheter Data ]
| Catheter Sizes |
Diameter
inches |
Diameter
MM |
| 3 |
.039 |
1 |
| 4 |
.053 |
1.35 |
| 5 |
.066 |
1.67 |
| 6 |
.079 |
2.0 |
| 7 |
.92 |
2.3 |
| 8 |
.105 |
2.7 |
| 9 |
.118 |
3.0 |
| 10 |
.131 |
3.3 |
| 11 |
.144 |
3.7 |
| 12 |
.158 |
4.0 |
| 13 |
.170 |
4.3 |
| 14 |
.184 |
4.7 |
| 15 |
.197 |
5.0 |
| 16 |
.210 |
5.3 |
| 17 |
.223 |
5.7 |
| 18 |
.236 |
6.0 |
| 19 |
.249 |
6.3 |
| 20 |
.263 |
6.7 |
| 22 |
.288 |
7.3 |
| 24 |
.315 |
8.0 |
| 26 |
.341 |
8.7 |
| 28 |
.367 |
9.3 |
| 30 |
.393 |
10.0 |
| 32 |
.419 |
10.7 |
| 34 |
.445 |
11.3 |
- Diameter in MM = Catheter Size/3
- Diameter in Inches = Catheter Size/76.2
- For oval or other shapes, measure the circumference in MM using a paper strip then multiply this length by 0.955 to obtain French size.
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