No, it is not necessary that you will be wearing the same pouch throughout after surgery. As the healing process occurs, the stoma may shrink in size and therefore, you might need to change the size of your pouch. And after the initial period of recovery, you might need to go back to a regular lifesyle, going back to work, etc. In that case you might need to change the type of pouch you are wearing, in order to adapt to your present needs. Your caregiver might help you in selecting the change.