Bags are available in a wide variety of volumes – 250ml, 350ml, 500ml, 600ml, 750 ml and (less commonly) 1000ml. You may find that you need a couple of different sized bags depending on your lifestyle.
Small bags tend to be more discreet under clothes and you might prefer to use a smaller bag when you are out and about but a larger one when you are at home and discretion under clothes is not so important.
If you choose a smaller volume you will have to empty the bag more frequently. As a guide, a bladder can hold up to 400-600ml (although this will vary depending on your personal circumstances). So a 350 ml bag may only contain one bladder full of urine (the same capacity as a large mug!).
A 500ml bag will weigh roughly 500g when full, so you need to ensure that the method you have chosen to hold it in place works well to prevent it moving out of position.
If your leg bag is attached to an indwelling catheter (as opposed to a sheath) you should not change the leg bag unnecessarily as this will break the closed drainage system. You should discuss this aspect of catheter care with your health care professional.
Sterile and Non-sterile
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