Why anyone cares about your bladder

A full bladder sits in the way. It can slow the baby's descent, it can make the uterus contract less efficiently, and after birth it can stop the uterus clamping down as it should. A bladder that over-fills while you cannot feel it can also be injured. That is the whole reason this became a guideline item rather than a matter of politeness.

What NICE asks midwives to do

NICE's intrapartum guideline has a short section headed bladder care. Teams are asked to "review bladder care for women at least every 4 hours", and that review should include:

frequency of passing urine and bladder sensation;
fluid balance monitoring if sensation is abnormal or absent, if there is an inability to pass urine, or if you are receiving intravenous fluids, including an oxytocin infusion;
"offering to insert a catheter if there are any ongoing concerns over the woman's ability to pass urine".

Note the verb in the third point. NICE writes offering, not inserting. A catheter in labour is a proposal that you can accept or decline, and the reason for it should be explained first.

NICE separately asks that fluid intake and output be discussed with you, including that "it is important to regularly empty the bladder", and that fluid balance be recorded if you are on intravenous fluids or an oxytocin infusion.

Why an epidural changes this

An epidural numbs the nerves that tell you your bladder is full, so the ordinary signal disappears. That is not a side effect anyone hides — it is the predictable result of blocking sensation from the waist down.

In practice it means the four-hourly review becomes more active. You may be reminded to try to pass urine on a schedule rather than when you feel the need, and a bladder scan or a catheter may be suggested if nothing is coming. Two kinds of catheter exist: an in-and-out catheter that drains the bladder and is removed immediately, and an indwelling catheter that stays in and drains continuously. Both are offers.

The caesarean rule

For a caesarean under a spinal or epidural, a catheter is not optional in the same way — it is part of the operation. NICE: "give women having caesarean birth with regional anaesthesia an indwelling urinary catheter to prevent over-distension of the bladder".

The Obstetric Anaesthetists' Association explains the timing kindly: the catheter goes in "while the anaesthetic is starting to work", and "this stays in until the heaviness in your legs wears off so you don't need to worry about getting to the toilet". The NHS describes the same step for a planned caesarean, alongside the gown, the cannula and the trimming of a small area of pubic hair. ACOG gives the reason from the surgical side: "keeping the bladder empty decreases the chance of injuring it during surgery".

If you are asleep under a general anaesthetic, the catheter goes in once you are unconscious.

When it comes out

This is one of the few places in maternity care with a hard number attached. NICE: "offer removal of the urinary bladder catheter once a woman is mobile after a regional anaesthetic for caesarean birth, but no sooner than 12 hours after the last 'top-up' dose".

Two conditions, both of which have to be met: you are mobile, and at least twelve hours have passed since the last top-up. If a catheter is still in and you feel ready for it to come out, that is the recommendation to ask about.

Does it hurt?

With a working spinal or epidural, you should not feel it being inserted — the HSE says as much of caesarean care in Irish units. Without a block, insertion is usually described as a brief stinging or pressure rather than pain. Whichever it is, you are entitled to be told what is about to happen and to ask for it to stop.

NICE's intrapartum guidance asks teams to "explain all procedures and observations before they take place and ask for consent for them", and to respect the woman's "personal space, privacy and dignity". A catheter is exactly the kind of procedure that recommendation was written for.

Afterwards

Passing urine after birth is checked before you go home. NICE's postnatal guideline asks teams to "assess the woman's bladder function by measuring the volume of the first void after giving birth" before transfer from the maternity unit to community care. It is a small measurement with a real purpose: a bladder that has been numbed, stretched or catheterised does not always resume normal service immediately.

Things worth reporting rather than tolerating: being unable to pass urine at all, passing only small amounts with a feeling of fullness, burning that persists, or leaking that is new. NICE lists bladder function among the things a midwife should assess at each postnatal contact, so it is a standing item rather than a complaint you have to raise cold.

What you can ask

Ask why a catheter is being suggested, whether an in-and-out catheter would do instead of an indwelling one, whether a bladder scan can be tried first, and when it is expected to come out. If you have had a difficult experience with catheters, with vaginal examinations, or with any internal procedure, that is worth writing into your notes antenatally so it does not have to be explained for the first time in labour.

It is also reasonable to ask for the room to be cleared of anyone who does not need to be there while it is done, and for a screen or a sheet. None of that slows the procedure down, and NICE's expectation of privacy and dignity covers it.

Catheters and Bladder Care in Labour