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How does a urinary catheter work?

  1. Jan 29, 2014 #1
    Hello everyone,


    1) Now in this catheter, how does passing saline through the ballon port inflate the ballon. Are there pores at the end of the tube, which allows fluid to go into the balloon and inflate it.


    1) What is the purpose of a 3 way catheter. If you want to clear out an infection I can understand you can send saline through one of the ports, but can't we do the same thing with a 2 way catheter. If we send saline through the ballon port in a 2 way catheter, wouldn't it fill the bladder after inflating the ballon and clear it.
    2) Why does a 3 way catheter have 2 ballons as shown in pic.

    Thanks :)
  2. jcsd
  3. Feb 6, 2014 #2
    Blood clots...
  4. Feb 6, 2014 #3
    The saline would only enter the bladder with the two way catheter after the balloon has burst. :eek: At that point there is no inflated balloon to keep the catheter in place.

    The two way catheters have a tube within a tube. The three way has two tubes within a tube. The are called channels or lumens in medical speak.


    Last edited by a moderator: Sep 25, 2014
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