Chapter 18: Pain Management for Childbirth

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Welcome back to the Deep Dive.

We are really glad you're here with us today because we are tackling a topic that, and I don't think this is an overstatement, is the absolute bedrock of part of nursing.

It really is.

We're looking at Chapter 18 Pain Management for Childbirth from Maternal Child Nursing Sixth Edition.

And if you're thinking, oh, this is just the chapter where they list the painkillers, you are in for, well, quite a surprise.

A massive surprise.

This isn't just a menu of drugs.

This is about physiology.

It's about psychology.

And frankly, it's about safety.

That's the word.

Safety.

So the mission for this Deep Dive is pretty specific.

We aren't just going to list dosages.

We are going to unpack the physiology of birth pain, walk through the non -pharmacologic methods, the soft skills that are actually pretty hard to master, and then get into the heavy hitters.

Systemic drugs, epidurals,

and emergency anesthesia.

And before we even look at a single diagram or drug table, we need to establish the why.

Because I think there is a lingering misconception that pain management in labor is purely a customer service issue.

Did you have a pleasant stay?

Was the bed soft enough?

Was your pain manageable?

Exactly.

Like checking into a hotel.

But the text makes it crystal clear.

We aren't just managing comfort.

We are managing physiologic stability for two distinct patients, the mother and the fetus.

You patients.

That's the core of it.

And while comfort is obviously important, from a nursing safety perspective, pain management is about preventing a pathological spiral.

You have to treat the mother to protect the baby.

So let's unpack that adverse effects section immediately.

Because I think this is the aha moment for a lot of students.

If a laboring patient is in excruciating, unmanaged pain that exceeds their tolerance, what is actually happening physically?

It sets off a domino effect.

Pain causes fear and anxiety.

That stress response triggers the sympathetic nervous system to release catecholamine.

Exactly.

Epinephrine and norepinephrine.

The adrenaline is pumping.

The body is thinking, I'm in danger.

Okay.

So what does that adrenaline do to the body in labor?

Well, high levels of catecholamines cause significant vasoconstriction.

That constricts the blood vessels leading to the placenta.

So suddenly you have reduced blood flow to the fetus.

Which means less oxygen for the baby.

Precisely.

And if that continues, the fetus can shift from aerobic metabolism, using oxygen, to anaerobic metabolism.

That creates a buildup of hydrogen ions, leading to metabolic acidosis in the fetus.

Wow.

So unmanaged pain isn't just unpleasant.

It can literally change the blood chemistry of the baby.

It absolutely can.

And for the mother, that same panic response leads to hyperventilation.

She's blowing off too much carbon dioxide.

She goes into respiratory alkalosis.

And her muscles, including the uterus, become tense and less effective.

So paradoxically, excessive pain can actually slow down labor.

It can make it stall out.

It's a vicious cycle.

That is a massive reframing for a lot of people.

So the nurse's role isn't just holding a hand.

It's guiding the patient to maintain physiologic balance so the baby stays safe.

That is the core of it.

The nurse is the guide.

You are empowering the patient, monitoring for safety, and you are intervening when that pain becomes pathological.

Okay, so let's start at the beginning of the chapter.

The unique nature of birth pain.

Because the book makes a really strong point that this isn't like breaking a leg or having a kidney stone.

It's fundamentally different.

I mean, most pain signals injury.

It says,

stop what you are doing.

Something is wrong.

Childbirth pain is part of a normal physiological process.

And it has a purpose, right?

It's not just random suffering.

It absolutely does.

The pain actually motivates the woman to change positions.

And when she moves to get comfortable, maybe getting on her hands and knees or swaying, she's often helping the fetus rotate and descend into the pelvis.

It's productive pain.

Plus there's the preparation aspect.

You don't usually get nine months to study for a car accident, like you do for labor.

Right.

That preparation allows for a different psychological approach.

Patients can learn coping skills and physically, it's self -limiting.

It has a foreseeable end.

But the most distinct feature structurally is that it is intermittent.

The waves, the contractions.

Even in late, intense labor, there is usually a rest period between contractions where the pain drops significantly.

That allows for recovery.

Unlike the constant ache of an injury, that rhythm is crucial for endurance.

Now let's get into the four P's.

The chapter lists four physical sources of this pain.

What are we actually feeling?

So first is tissue ischemia.

When the uterus contracts, it squeezes its own blood supply.

It's similar to ischemic heart pain or a really bad muscle cramp.

It's caused by a temporary lack of oxygen to the muscle tissue.

That's that deep visceral ache.

Yes.

Second is cervical dilation.

I mean, stretching that cervix from zero to 10 centimeters is a major source of pain.

Third is pressure and pulling on pelvic structures, ligaments, tubes, the peritoneum.

Everything is getting tugged on.

And the fourth, that's later.

Right.

That's the distension of the vagina and pairing it.

This happens later during the second stage.

This is what we call somatic pain.

It's sharp, localized, burning, the ring of fire people talk about.

The book has this great diagram, figure 18 .1, showing the nerve pathways.

It seems like the pain travels differently depending on the stage of labor.

It does.

And nurses use this diagram to target interventions.

In the first stage, which is mostly cervical dilation and uterine ischemia, the pain signals enter the spinal cord at T10, T11, T12, and L1.

So that's lower thoracic and upper lumbar.

Right.

It's often referred to the lower abdominal wall and the lower back.

But as the baby descends and we hit the second stage, the source shifts to perineal distension.

Those signals travel via the pudendal nerve to S2, S3, and S4.

The sacral area.

Exactly.

So early labor pain is belly and back, while late labor pain is bottom and birth canal.

Knowing that anatomy helps you explain why back rub helps early on, but might not touch the pain later.

Before we leave the variables, we have to talk about fetal position.

Sunny side up, baby.

Oh, the posterior occiput position.

This is a huge variable.

If the back of the baby's head is pressing against the mother's sacrum with every single contraction,

the pain is intense.

And it's often continuous, even between contractions.

That's back labor.

That is back labor.

And as a nurse, recognizing that tells you immediately that you need specific interventions, like sacral pressure, to counteract that force.

Okay.

Let's move to section two.

Non -pharmacologic pain management.

The soft stuff.

The book calls this the foundation.

It is the foundation because these methods rely on the gate control theory.

And even if a patient wants an epidural, there is always a gap where she needs these skills.

You have to wait for the anesthesiologist, wait for labs.

Can we break down the gate control theory?

What does that actually mean?

So imagine the pain signals are cars trying to get onto a highway to the brain.

The highway has limited lanes.

The gate control theory says that if we flood that highway with other sensory input, like touch temperature focused breathing, we can essentially create a traffic jam.

You're blocking the road.

We are.

The pain signals get blocked or diluted by the other sensations.

We are engaging large diameter nerve fibers with touch and temperature to close the gate on the small diameter fibers carrying pain.

So we are distracting the nervous system.

In a way, yes.

It's a very real physiological process.

And the master skill here is relaxation.

It sounds simple, but under stress, it's really hard.

The text talks about neuromuscular dissociation.

That sounds complicated, but it just means training the body to relax all the muscles except the uterus.

So while the her legs, her jaw, her face loose, it saves energy and oxygen for the baby.

Let's talk about the cutaneous strategies touching the pain away.

We've got effleurage.

Effleurage.

It sounds fancy, doesn't it?

But it's just light fingertip circle massage on the abdomen.

It stimulates those cutaneous nerve fibers we just talked about.

It's very effective in early labor.

But then there's the opposite.

Sacral pressure.

Figure 18 .3 shows us this is not light.

Not at all.

This is critical for that posterior baby we mentioned.

You use the heel of your hand, a fist, or even tennis balls and a sock, and you apply firm, steady pressure to the lower back.

It directly counteracts the pressure of the fetal head.

For a woman in back labor, this can be the difference between coping and falling apart.

I believe it.

And then there is hydrotherapy.

Box 18 .1 in the text goes into this.

The shower or the tub.

The benefits are massive.

Buoyancy supports the body so her muscles can relax.

It actually reduces edema because the hydrostatic pressure shifts fluid from the tissues back into the vessels.

And physiologically, it can even speed up labor by helping the cervix dilate.

But are there safety rules?

Can anyone jump in the tub?

No, not anyone.

If there's thick meconium in the amniotic fluid, hydrotherapy is usually contraindicated.

Why is that?

Because we need continuous, rigorous monitoring to watch for fetal distress, which meconium can signal.

And generally, if you need continuous electronic fetal monitoring, you can't use the tub unless your facility has waterproof telemetry units.

Good to know.

Let's switch to the mental game.

Imagery focal points.

Right.

Mental stimulation.

Imagery can be visualizing the cervix opening like a flower or just picturing a safe place like a beach.

A focal point is just staring at a specific object, a picture, a spot on the wall to maintain control and focus during a contraction.

And breathing techniques.

I feel like in movies, this is the only thing people know about labor, the hee -hee -hoo.

It's iconic, but there's a science to it.

We always, always start with the cleansing breath.

The big sigh.

Right.

A big deep breath in through the nose and a full exhale out through the mouth.

You do it at the start and end of every single contraction.

It oxygenates the baby right when the squeeze starts, and it also signals the partner that the wave has begun.

It's a ritual.

And then we have the pacing.

Figure 18 .5 shows slow paced breathing.

That's usually about half the normal respiratory rate.

Slow, calm, in and out.

You use this for as long as it is effective.

When it stops working, you move to modified paced, which figure 18 .6 shows is faster, shallower, more of a chest breathing.

And when that stops working, when things get really intense.

Then you get to the pattern paced.

That's your hee -hoo or pant blow shown in figure 18 .8, usually three to one or four to one ratios.

The rhythm demands intense concentration, which effectively distracts the cortex from the pain perception.

It also helps prevent pushing before she's fully dilated.

But there's a risk here.

Hyperventilation.

A very real risk.

If she breathes too fast and deep, she blows off too much CO2.

The symptoms are dizziness, tingling in the lips or fingers.

And the nursing fix is.

You have to help her re -breathe that CO2.

Have her breathe into her own cupped hands or a small paper bag.

It fixes the respiratory alkalosis almost immediately.

One last thing on breathing.

The second stage.

Pushing.

The book mentions laboring down.

This is a major shift in modern nursing.

We used to tell everyone to hold their breath for 10 seconds and push as hard as they could.

The closed glottis push.

But we now know that prolonged breath holding drops cardiac output and reduces oxygen to the baby.

So what's the practice now?

Now we encourage open glottis pushing.

Glunting, moaning, exhaling while pushing.

And laboring down means if the cervix is fully dilated, but she doesn't feel a strong overwhelming urge to push yet, we wait.

We let the uterus do the work for a while.

It saves her energy and keeps the baby happier.

Okay, let's step up the ladder.

Section three.

Pharmacologic management.

We're talking systemic drugs.

Right.

And the challenge here is that we are medicating two patients.

Almost everything given to the mother crosses the placenta.

So we have to constantly balance her relief with the baby's safety.

First up is nitrous oxide.

It seems to be making a comeback.

It is.

It's a 50 -50 mix with oxygen.

The key safety feature is that it is self -administered via a mask.

The patient has to hold it to her own face.

So if she gets too drowsy.

Her hand drops, the mask falls away, and she stops getting the gas.

It's a built -in safety mechanism.

Plus, it clears from the lungs very quickly so there's minimal risk to the newborn by the time of birth.

Main side effect.

Dizziness, maybe some nausea.

But many women love the control it gives them.

It doesn't numb them, but it can make them care less about the pain.

It creates a sense of dissociation.

When we have the classic opioids, systemic analgesia.

The goal here isn't zero out of 10 pain, right?

No, absolutely not.

The goal is to take the edge off.

To blunt the perception of pain so she can rest between contractions.

If you promise her it will go away completely, you're setting her up for disappointment.

The book talks about the paradigm, or Demerol.

But it sounds like a warning.

It is a warning.

Demerol creates an active metabolite called Normaparadigm.

It has a really long half -life.

If the baby is born with that in their system, they can have neurobehavioral depression for days.

It's why it's so rarely used now.

So what do we use instead?

Fentanyl is very common.

It's short -acting, has a rapid onset.

It doesn't linger in the baby system as long.

It gives you a good window of pain relief without the long -term neonatal effects.

These are fascinating drugs.

They provide pain relief, but have what's called a sealing effect on respiratory depression, which makes them safer in one regard.

But, and this is a huge flashing red light for nurses, you must never, ever give these to a woman who is opioid dependent.

Why not?

Because of the antagonist part of the drug.

It acts like Narcan.

It will knock the opioids off her receptors and precipitate immediate severe withdrawal symptoms.

It's incredibly dangerous for both the mom and the fetus.

You have to check her history.

Speaking of Narcan or Naloxone, that's our antidote.

Right.

It reverses opioid -induced respiratory depression.

But here is the critical nursing alert from the chapter.

Narcan has a shorter half -life than most of the opioids we use.

So wears off before the opioid does.

Exactly.

You might revive a baby or a mom, and they look great.

But 30 minutes later, the Narcan wears off, the opioid is still floating around in their system, and they can stop breathing again.

You have to monitor for that recurrence.

Okay.

And what about a junk of drugs like Promethazine or Fenergan?

Yeah, that's often in the mix too.

It's mainly used as an adjunct to help with the nausea that opioids can cause, and it also potentiates the effect.

It makes the pain meds work a little better and provide some sedation.

All right.

Let's move to section four, the heavy hitters.

Regional pain management.

We're talking epidurals.

The gold standard for pain relief and labor.

There is simply nothing else that provides this level of complete pain management.

Let's visualize the anatomy like in figures 18 .11 and 18 .12.

Where is this needle going?

We are looking at the L3L4 interspace in the lower back.

The needle goes into the epidural space.

This is crucial.

It is outside the dura mater.

We are not entering the spinal fluid.

A tiny flexible catheter is then threaded in, and we can pump medication in continuously for hours.

Before the anesthesiologist even comes in the room, the nurse has to check the labs, specifically platelets, right?

Absolutely.

Coagulation defects are a major contraindication.

If her platelet count is too low, we risk causing an epidural hematoma, a bleed that compresses the spinal cord.

That can cause permanent paralysis.

It's a never event.

Okay.

So the labs are good.

The catheter is in.

The anesthesiologist does a test dose.

What are they testing for?

They inject a tiny amount of anesthetic mixed with epinephrine.

They are asking one simple question.

Did I accidentally put this catheter into a blood vessel?

And if they did, what happens?

The epinephrine hits the bloodstream and the heart rate shoots up tachycardia, or the woman might get a metallic taste or hear ringing in her ears.

If any of that happens, you know you're in the wrong spot.

You pull it out and start over.

You do not want to inject a full dose of anesthetic into a vein.

That's toxic.

So the test dose is clear.

The epidural is running.

What is the number one risk the nurse is watching for?

Hypotension, maternal hypotension, a sudden significant drop in blood pressure.

Why does that happen?

Because the epidural blocks the sympathetic nerves that control vascular tone.

The blood vessels in the lower body relax and dilate.

Blood pools in the legs and less blood returns to the heart.

Blood pressure tanks.

And if mom's pressure drops,

blood flow to the placenta drops.

Correct.

The baby will often show late decelerations on the monitor.

It's a direct consequence.

So how do we prevent it?

What's the nursing intervention?

We preload her with IV fluids.

Before the epidural even starts, the nurse runs in 500 to 1 ,000 millilet of IV fluid, usually lactated ringers.

We fill up the tank so that when the vessels dilate, there's enough volume there to maintain pressure.

And if her pressure drops anyway?

Nursing interventions 101.

Turn her to her left lateral side immediately to get the weight of the uterus off the vena cava.

Increase the IV fluids.

Give oxygen by face mask.

And if needed, the anesthesia provider will give a vasopressor like ephedrine to constrict the vessels back up.

There are other side effects too.

What about the bladder?

She loses the sensation to void.

A full bladder acts like a speed bump for the baby's head.

It can literally stop the baby's descent.

So the nurse has to catheterize her either intermittently or with a foley to prevent stalling labor.

It's a key intervention.

And what about the prolonged second stage?

Yeah, sometimes the epidural works a little too well.

It can reduce the urge to push.

She might need more coaching from the nurse or we might need to let her labor down longer to let the baby descend on its own before we start active pushing.

Okay, now compare the epidural to a spinal block or a suberacnoid block.

So as you can see in figure 18 .13, this needle goes deeper.

It pierces through the dura into the cerebrospinal fluid, the CSF.

It's a one -shot deal, not a continuous catheter.

It's used mainly for scheduled C -sections and provides a dense block up to the T4, T6 level.

And big risk here is the headache.

The post -dural puncture headache.

It's caused by leakage of CSF from that little hole in the dura.

It causes a severe headache, but only when she's upright.

It's relieved by lying flat.

And the cure is fascinating.

Figure 18 .1 fee shows the blood patch.

It really is.

They perform another epidural procedure, but instead of medication, they inject about 20 milliliters of the woman's own blood into the epidural space.

It forms a clot that acts like a patch over the hole in the dura.

It stops the leak and cures the headache almost instantly.

Incredible.

The book also mentions the CSE -combined spinal epidural.

Yeah, the walking epidural.

You get the fast, potent relief of the spinal portion, usually with an entropical opioid that doesn't cause a motor block.

And you also have the epidural catheter in place for continuous relief later.

It gives you the best of both worlds initially.

And briefly, the pudendal block.

Figure 18 .9 shows the injection sites.

This is a very targeted block.

It's only for the second stage, for the birth itself, or for repairs afterwards.

It numbs the saddle area, the lower vagina and perineum.

It does absolutely nothing for contraction pain.

Or local infiltration, like in Figure 18 .10.

That's just injecting lidocaine directly into the perineal tissue, usually just for an episiotomy or to repair a tear.

The woman will feel a burning sensation on injection, but then the area goes numb.

Okay, Section 5.

General anesthesia.

The emergency situation.

Right.

Its usage is very rare for birth these days.

It's really reserved for a true emergency C -section when there's no epidural in place.

Or for women who have contraindications to regional blocks, like a severe coagulopathy.

The major, major risk is?

Aspiration.

The pregnant stomach has higher pressure and a relaxed sphincter because of progesterone.

There's a huge risk of regurgitating acidic stomach contents into the lungs, which causes aspiration pneumonitis.

It can be fatal.

So what are the prevention steps?

First, NPO status, if possible.

We give an antacid like Bicitra, which is sodium citrate, to neutralize the stomach acid right before the procedure.

And then there's the CELIC maneuver, which you can see in Figure 18 .10.

Describe that.

Who does it?

The nurse or another assistant does it.

As the anesthesiologist is intubating the patient, you apply firm pressure to the cricoid cartilage in the neck.

It pinches off the esophagus to physically block any regurgitation from coming up.

And what about the risk to the fetus?

Respiratory depression.

The anesthetic drugs cross the placenta and can make the baby sleepy and unable to breathe well at birth.

The goal is to get the baby delivered as quickly as possible after anesthesia induction to minimize that drug transfer.

Let's bring this all home with Section 6, Nursing Care and Clinical Decision Making, pulling it all together.

Exactly.

First, in assessment, those pain scales, the 0 to 10, can be tricky.

A first -time mom has no context for worst pain imaginable.

So you have to use behavioral cues.

Is she guarding?

Is there muscle tension?

How is she breathing?

And don't make assumptions.

A quiet patient may be in agony just coping internally.

And for planning and interventions,

what are the priorities?

Safety is number one.

If her legs are numb from an epidural, protect her from injury.

Don't let her walk until sensation fully returns.

The environment matters.

Reduce irritants like wet sheets or bright lights.

And the bladder.

Always the bladder.

Check for distension every two hours, at least.

A full bladder will block fuel descent full stop.

And positioning is key.

Change her position every 30 to 60 minutes.

Keep her upright or sidelying to prevent aortic oval compression.

And finally, evaluation.

It's not just, is the pain gone?

It's, is the patient satisfied with her coping ability?

Are her vital signs stable?

And most importantly, is the fetal heart rate pattern reassuring?

It's a constant balancing act.

So to recap this whole journey.

Wow, we moved from the unique physiology of intermittent labor pain, which is actually productive.

Right, and then into the gate control theory and all those non -pharmacologic methods that use it.

Then we explored the systemic reach of opioids and that critical safety net of Narcan and its half -life.

We unpacked the anatomy of epidurals and spinals, hammering home that hypotension risk and the nurse's role in preventing it.

And finally, we covered the emergency protocols for general anesthesia where every second counts.

At the end of the day, nursing management of childbirth pain isn't just about comfort.

It's about facilitating a safe passage for two patients at the same time.

It requires a balance of empathy, incredible technical skill, and just vigilant constant monitoring.

Thank you for listening to this deep dive into Chapter 18.

This has been a production of the Last Minute Lecture Team.