Skip to main content
. 2011 Oct 6:442–550. doi: 10.1016/B978-1-4377-0798-4.00004-9

Table 4-6.

Recommended Urethral Catheter Sizes for Routine Use in Dogs and Cats

Animal Urethral Catheter Type Size (French Units*)
Cat Flexible vinyl, red rubber, or Tom Cat
catheter (polyethylene)		 3.5
Male dog (≤25 lb) Flexible vinyl, red rubber, or polyethylene 3.5 or 5
Male dog (≥25 lb) Flexible vinyl, red rubber, or polyethylene 8
Male dog (>75 lb) Flexible vinyl, red rubber, or polyethylene 10 or 12
Female dog (≤10 lb)) Flexible vinyl, red rubber, or polyethylene 5
Female dog (10-50 lb) Flexible vinyl, red rubber, or polyethylene 8
Female dog (>50 lb) Flexible vinyl, red rubber, or polyethylene 10, 12, or 14
*

The diameter of urinary catheters is measured on the French (F) scale. One French unit equals roughly 0.33 mm.

From Crow S, Walshaw S: Manual of clinical procedures in the dog, cat and rabbit, ed 2, Philadelphia, Lippincott-Raven, 1997.