4.7-French double-J catheter

What does "4.7-French double-J catheter" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

A 4.7-French double-J catheter is a small, flexible tube used in medical procedures. The "4.7-French" part refers to the diameter of the catheter, with one French unit being roughly equivalent to one-third of a millimeter. The "double-J" refers to the shape of the catheter, which has curves at both ends that look like the letter "J". This type of catheter is often used to help urine flow from the kidneys to the bladder when there's a blockage.

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