Anaesthetist with interest in obstetrics here.
@Rosspoldarkssaddle in most hospitals (unless pretty small) there will be an anaesthetist "assigned" to labour ward 24/7. In the daytime there may well be more than one, but after ~6pm and at the weekend it will often only be one. If there's an EmCS or an instrumental delivery that's us in theatre for at least 45 minutes, can easily be up to 2 hrs. A straightforward epidural takes me ~40 minutes from walking in the door to leaving with it set up - so if more than one woman asks at a similar time, one of them will be in for a longish wait. I work in a very busy labour ward in a huge hospital, and we just don't have enough anaesthetists to provide two on LW out of hours. Sometimes I can call a colleague over from one of the theatre suites if they aren't busy, or call the consultant in from home in an emergency, but the former is no guarantee and the latter still takes time.
It's not just a matter of sticking a needle in the back. You have to get a brief history from the patient to make sure there aren't any medical reasons that an epidural wouldn't be safe, explain the procedure and the risks, set up sterile kit, scrub up, get the patient sat/lying in the right position, clean the back, allow the skin to dry and drape it. That's about 20 minutes before I can put a needle anywhere near - can be sped up a little if I have an experienced assistant but I often have to do it all myself. The actual insertion of the epidural catheter only takes a couple of minutes if it's easy, but it isn't always! Then you have to put on dressings, reposition the woman back into bed, give a test dose, programme and attach the pump (again, can be helped by an assistant but I have to check it), and write all my notes and prescription.
@Strandliv all of those statements are relevant, but not all essential.
- there is an anaesthetist and ODP available See above re. availability. We never hear about the ones where the MW doesn't get as far as asking us.
- the woman can stay very still - lots of women do move a lot if in a lot of pain, but they MUST stay still for at least a couple of minutes while the needle is in. I've never actually had to abandon one because someone couldn't sit still, but I have had to be very blunt on occasion.
- she has a normal BMI so her spine can be palpated easily - helpful but not essential. Overall, a higher BMI tends to make it more difficult but it's variable both ways.
- she has a normal shaped spine ie. not scoliosis - makes it easier but again not impossible
- the anaesthetist is very experienced - not really. There is a basic level of competency we must achieve to be able to cover labour ward on our own, but I wouldn't say it's VERY experienced. However, you do tend to get slicker the more you do!
- you have a midwife who is qualified to care for someone who has an epidural in situ Most labour ward midwives are, but if a woman has e.g. transferred in from a MLU, or a midwife has been called in from community duties due to the unit being super busy, there are some who aren't able to care for women with an epidural. Usually the LW co-ordinator would change midwives around to facilitate this though.
- blood results have already checked ie platelets and full blood count If a woman is low risk and has normal 28 week bloods, repeat samples are not needed. But if there are any complications like pre-eclampsia, we need very up to date blood samples, usually taken within the last 6 hours. If we miss a low platelet count or clotting abnormalities the complications could be severe.
Hope that helps!