Chapter 38: Medication Administration and Safety for Infants and Children

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Welcome back to The Deep Dive.

Today we are stepping into what I honestly think is one of the most high stakes, high pressure environments in all of healthcare.

Oh for sure.

We're not talking about brain surgery or trauma units, though this certainly applies there.

We are talking about the art and science of medication administration for infants and children.

It is a high stakes environment, absolutely.

And I'm glad you called it an art and science because you really, really need both.

It's a topic that often makes even seasoned professionals a little sweaty.

I can imagine.

Because when you're dealing with pediatrics, the margin for error isn't just small.

It's, it's practically non -existent.

That's the vibe I got reading this.

The source material for today is chapter 38 from Maternal Child Nursing, the sixth edition.

And the mission for this dive is pretty clear.

We want to create a comprehensive audio companion for you, the learner.

Whether you're a nursing student sweating over your pharmacology exam or just someone fascinated by how the human body works, we are going to break this down.

And we're going to look at why a child's body handles drugs so differently than an adult's, how to do the math so you don't hurt anyone.

And, you know, honestly,

the psychology of how on earth you convince a screaming toddler to take a bitter liquid.

Which might be the hardest part of the whole equation.

It often is, but to underline why this matters before we jump in, nurses are the last line of defense.

You are legally responsible for safe administration.

And here is a statistic that should wake everyone up.

Children are three times more likely to experience a potential adverse drug event than adults.

Three times more likely.

Wow.

That seems incredibly high.

Why the disparity?

Well, it's because their physiology is in flux.

Their systems are immature.

If you make a dosing mistake with an adult, their liver or kidneys can often, you know, buffer it.

They have reserves.

Right.

Child, their bodies can't buffer it the way an adult body might.

A small error can become a tragedy very, very quickly.

Okay, that is sufficiently sobering.

So let's get into our roadmap.

We're going to start with the hard science pharmacokinetics.

Then we'll move to the soft skills, the psychology of winning cooperation.

After that, we'll get into the technical skills, safety calculations, injections, and IVs.

Let's do it.

So pharmacokinetics is the word that gets thrown around a lot.

It's a mouthful.

It essentially means what the body does to the drug.

You take a pill, you take a pill, you take a pill, and the body has to absorb it, distribute it, metabolize it, and then excrete it.

As opposed to pharmacodynamics.

Right.

And pharmacodynamics is what the drug does to the body, you know, like lowering blood pressure or killing bacteria.

But for our purposes today, we really have to focus on kinetics because that is where the child adult differences are most extreme.

That's the mantra, right?

Children are not just small adults.

It is the absolute number one rule.

So let's look at figure 38 .1 from the text, which really helps visualize these differences.

Let's start at the beginning.

Absorption, specifically oral medication.

You pop a pill or swallow some syrup and it goes to your stomach.

What's different in a baby?

Well, first off, gastric acidity.

In adults, the stomach is an acid bath.

It's designed to break things down.

But infants have gastric secretions that are much less acidic.

Their pH is higher.

So practically speaking, what does that mean for a pill?

It's a double -edged sword, really.

Some medications require an acidic environment to dissolve and be absorbed.

If you give those to an infant, they're going to be absorbed much more slowly or less effectively.

Because the acid just isn't there to break them down.

Exactly.

But flip the coin.

If you have a medication that prefers an alkaline environment, one that's actually destroyed by acid, it might be absorbed way too fast or too thoroughly in a baby.

So the same milligram dose could be ineffective or toxic just based on the pH of the baby's stomach that day.

Precisely.

And then you add gastric emptying time.

In adults, we have a pretty predictable rhythm of digestion in infants.

The stomach empties intermittently and unpredictably.

Usually it's slower.

And since most drugs are actually absorbed in the small intestine, not the stomach.

Exactly.

If it's sitting in the stomach, it's like it's stuck in a waiting room.

It's delaying the onset of the drug.

It takes longer to reach the therapeutic level in the blood.

But then the source mentions GI motility.

How fast things move through the intestines.

Yes.

In infants up to about eight months, motility is often prolonged.

So things move slowly.

That gives the drug more time to contact the intestinal wall and be absorbed, which can lead to higher levels in the blood than you intended.

But what if that same infant has diarrhea?

Which, let's be honest, babies often do.

Then everything speeds up.

It rushes through like a bullet train.

And the drug doesn't have time to get off at the station.

It doesn't get absorbed.

So a nurse has to look at the whole picture.

The whole picture.

Is the baby eating?

Do they have diarrhea?

How old are they?

You can't just follow the label blindly.

It's wild how dynamic it is.

Now, what about non -oral routes?

I was reading about intramuscular injections, or IM.

The source mentions that infants have about 25 % muscle mass compared to an adult's 40%.

Correct.

They are, you know, soft little things.

Not only is the muscle mass smaller, but the blood flow to those muscles can be erratic.

In an adult, if you inject into the arm, you know pretty well how fast it'll hit the bloodstream.

In an infant, depending on their temperature or activity level, that blood flow varies.

The drug might sit in the muscle or it might rush in all at once.

And then there's the skin.

Topical meds.

Yeah.

I feel like parents make this mistake a lot.

Oh, it's just a little cream.

This is a huge safety alert.

A massive one.

Infants and young children have a very thin stratum corneum.

That's the outer layer of skin.

It's barely there.

Plus, they have a huge body surface area relative to their weight.

So if you put a potent steroid cream on a baby, they absorb it like a sponge.

What should be a local skin treatment can easily become a systemic dosage affecting the whole body.

You can actually overdose a child just through their skin.

That's terrifying.

Okay, let's move to the next phase.

Distribution.

The drug is in the blood.

Now, where does it go?

The source makes a big deal about water content.

This is a concept you have to grasp.

Infants are basically water balloons.

Water balloons?

Essentially.

A premature infant is about 90 % water.

A term infant is 75%.

An adult is closer to 60 % or less.

Being 75 % water sounds squishy.

But how does that affect dosing?

It dramatically affects water soluble medications.

Because there is so much water to dilute the drug, infants often need a higher dose per kilogram of water soluble drugs to achieve the same concentration in the blood as an adult.

That feels incredibly counterintuitive.

You'd think smaller baby, smaller dose.

Yeah.

But for water soluble drugs, you actually need more per weight because they're so diluted.

Precisely.

It spreads out too thin.

But then you have to look at protein binding.

This is a bit technical, but it's so crucial.

Drugs often hitch a ride on proteins in the blood, specifically one called albumin to get around.

It's like a taxi service.

Okay, I'm with you.

But newborns and preemies have less albumin.

They have fewer taxis.

So the drug is left standing on the curb.

It's left free.

And in pharmacology, free drug is active drug.

If it's bound to a protein, it's biologically inactive for the moment.

If it's free, it's doing its work or doing damage.

So fewer proteins means more free active drug circulating.

Yes.

Which dramatically increases the risk of toxicity.

And the blood brain barrier.

It's not fully closed yet.

It doesn't mature until about age two.

So the central nervous system is wide open.

Drugs that wouldn't affect an adult's brain can pass right through an infant causing encephalopathy or other CNS issues.

It really paints a picture of vulnerability.

The gates aren't locked.

The chemistry is different.

And then we have metabolism, the liver.

The liver is the primary metabolism site.

In newborns, the enzyme systems are immature.

So they metabolize drugs very, very slowly.

That takes them a long time to break things down.

Okay.

But and here's where it gets really interesting.

Once they hit toddlerhood and preschool age, that flips.

Wait, it speeds up.

It revs up.

Toddlers and preschoolers often metabolize certain drugs like pain meds or asthma meds faster than adults.

Their metabolic rate is high.

So you might have a situation where a toddler needs more frequent dosing than you'd expect.

Exactly.

Just to keep the therapeutic level up.

And finally, excretion.

The kidneys.

Immature.

Until about age one or two, the glomerular filtration rate.

Basically, the filter speed is lower.

They can't filter the drug out of the blood as fast.

So the drug circulates longer.

It circulates longer, again, raising the toxicity risk.

And if the child is dehydrated, it's even worse.

The kidneys just clog up.

So to summarize the physiology,

the acid is different.

The skin is thinner.

They're full of water.

Their brain barrier is open.

Their liver is unpredictable and their kidneys are slow.

You got it.

Which is why children are not small adults is the golden rule.

You cannot just scale down an adult dose and hope for the best.

Okay.

So that's the biology.

That's the canvas we're working on.

But even if you get the math perfect,

you still have to get the child to actually take the medication.

Let's talk about the psychology of administration.

This feels like a negotiation class.

It is negotiation, but it's also about trust.

The general principle here is honesty.

You never, ever lie to a child.

If it tastes bad, you say, this is going to taste sour.

If it's going to hurt, you say, it will feel like a pinch.

Why wouldn't a little white lie in the moment?

In that one moment, maybe, but you lose them for every single subsequent interaction.

If you say this won't hurt, and then you stick them with a needle, you have taught them that nurses are liars and the hospital is a dangerous place.

You just destroy the trust.

That makes a lot of sense.

Let's break it down by age because a two year old is very different from a 12 year old starting with infants.

They can't understand it's for your own good.

No, for infants, it's all about physical comfort and security.

Cuddle them before, cuddle them after.

Often you need the parent to help hold them safely so they don't thrash.

It's about minimizing the trauma of the moment.

You want to associate the nurse with comfort, not just pain.

Absolutely.

Then we hit the toddlers, the terrible twos.

The age of magical thinking.

This is fascinating.

A toddler doesn't understand cause and effect the way we do.

They might view a shot or a bad tasting medicine as a punishment.

They think, I had a bad thought or I was naughty, so now the nurse is hurting me.

Oh, that breaks my heart.

They internalize it as their fault, so how do you counter that?

You can't reason them out of it logically.

You use play, you use stickers, you praise them excessively.

You're so brave.

Physical touch, letting them sit on a parent's lap is crucial.

It makes them feel safe.

You have to separate the pain from the punishment in their mind.

Preschoolers, ages three to five, still magical thinkers.

Yes, but with a specific, very intense fear of bodily harm.

They worry about their bodily integrity.

They often think that if you poke them with a needle, their insides will leak out.

Their insides will leak out like a balloon.

Exactly like a balloon.

It's a very common fear.

That's why band -aids are absolute magic for this age group.

They don't just cover the wound.

In the child's mind, the band -aid actually fixes the hole and keeps them intact.

It seals the leak.

Note to self, always have cool band -aids.

And the source mentions offering choices.

Limited choices.

This is key.

You never ask, do you want to take your medicine?

Because the answer will be a screaming no.

Right.

You ask, do you want it with apple juice or grape juice or do you want the blue cup or the red cup?

It gives them a shred of control in a situation where they feel powerless.

Bend school -aged children.

They're starting to get it right.

They can understand the why.

You can explain, this medicine fights the germs.

But they fear loss of control.

They might act brave, but be terrified inside.

So what's the strategy?

Distraction works wonders here.

Squeezing a hand, listening to music, talking about their favorite video game while you work.

And finally, adolescents.

Teenagers are tricky.

They are dealing with body image, peer status, and a desperate need for independence.

And interestingly, they often have a hyper response to pain.

They might react more intensely than you'd expect.

So treat them like adults.

Treat them like partners.

Involve them in decisions.

Which arm do you want?

Do you want to do this now or in 10 minutes?

Give them outlets for their frustration.

If you treat them like a child, they will rebel.

If you treat them with respect, they usually step up.

It really is an art form.

Okay, let's pivot to the technical side.

Safety and calculations.

The source references the to air is human report.

A landmark report.

It woke up the medical world.

Medication errors are the most common cause of morbidity in medical errors.

And in kids, because of those physiological factors we discussed, errors are often more dangerous.

So we have the six rights.

I feel like we should chant these.

It is a mantra.

Every nurse knows it.

Right patient, right drug, right dose, right time, right route, right documentation.

It sounds simple, but I imagine in a chaotic ER, it's easy to slip up.

That's why you have to verify all six every single time.

No shortcuts.

And for the really dangerous stuff, insulin, digoxin, chemotherapy, opioids, you don't just check it yourself.

These are the high alert medications.

Correct.

Policy usually dictates a dual verification.

That means a second nurse independently calculates the dose and checks the pump settings.

Independently is the key word there, right?

You're not just asking them to check your work.

Yes.

You don't just show them your math and say, hey, does this look right?

Because their brain will naturally want to agree with you.

It's confirmation bias.

They have to take the order, do the math from scratch on a blank piece of paper and then compare answers.

And if the numbers don't match, nobody moves until you figure out why.

Speaking of math, let's talk about how we calculate these doses.

In adults, it's often just 500 milligrams.

In kids, it's almost always weight -based.

MEJ is the standard.

Milligrams per kilogram.

You take the child's weight in kilograms.

And please, for the love of everything, always use metric, never pounds.

Why is that distinction so critical?

Because errors in converting pounds to kilos are a huge source of overdoses.

If a child weighs 22 pounds, that's 10 kilos.

If you accidentally calculate based on the number 22, you have just given them more than double the dose.

Oh, wow.

And that can be fatal.

That is terrifyingly easy to do if you're tired or distracted.

And then there's the BSA method, body surface area.

This seems even more complex.

It is, but it's for very precise dosing, often used in chemotherapy, where the therapeutic window is tiny.

It uses a nomogram.

It's actually quite clever analog tech.

You have a column for height and a column for weight.

You take a ruler and draw a straight line connecting the child's height and weight.

And where the line crosses the middle column.

The point where that line intersects the middle column tells you the BSA in square meters.

It feels very old school in a digital world, but I like the visual check.

It forces you to look at the data physically.

It works.

And then you plug that BSA number into a formula to get the safe dose.

Before we move on, I want to touch on medication reconciliation.

Crucial.

This is comparing what the child takes at home with what is ordered in the hospital.

You have to catch discrepancies.

Maybe the parents are using an herbal supplement that interacts with the hospital meds.

Or the dose is just wrong.

Or maybe they say they're taking a dose, but when you check the bottle, the concentration is different.

You have to play detective.

And preventing errors at home.

The source mentions household spoons.

Oh, banish the kitchen spoon.

A teaspoon from your silverware drawer is not a unit of measurement.

It can vary hugely in volume.

I've seen parents use a soup spoon thinking it's a teaspoon.

So what's the rule?

Always, always use a calibrated oral syringe or a medicine cup with metric markings.

Okay, let's get into the how to.

Rits of administration.

Starting with oral.

It sounds easy, but doing it with a struggling infant is not.

For infants, there's a specific hold.

You cradle the head in the crook of your arm.

You often hold their hands with your free hand so they don't swat the syringe away.

And where do you aim the medicine?

And here's the trick.

You don't squirt it straight down the throat.

Why not?

Aspiration risk.

They could choke or breathe the fluid into their lungs.

You aim for the buckle cavity, the pocket inside the cheek, and you do it slowly, a little bit at a time, letting them swallow naturally.

And the source has a very specific rule about mixing meds with food.

Yes.

You can mix it with a little applesauce or pudding to mask the taste,

but never mix it with their essential food like formula or breast milk.

Because if they don't finish the bottle.

Exactly.

If you put the med in a full bottle and they only drink half, you have no idea how much medication they actually got.

And worse, you might create a food aversion.

Oh, right.

If the milk tastes bitter once, the baby might refuse to eat later.

You don't want to turn their main source of nutrition into a battleground.

Smart.

Now, ears.

Audit administration.

There's a directional trick here, depending on age, that apparently appears on every nursing exam ever.

The pinnacle.

It is a classic board exam question.

If the child is under three years old, you pull the pinna, which is kind of the earlobe area, down and back.

Down and back for under three.

Right.

But if they're over three years old, you pull the pinna up and back.

Why the difference?

Is the ear moving?

The anatomy changes.

The ear canal in infants curves downward.

Pulling down and back straightens it out so the drops reach the eardrum.

As they grow, the canal shape changes, so up and back becomes the way to straighten it.

That is the kind of detail I love.

What about nasal drops?

Is there a trick there?

It's mostly about position.

You want to hyperextend the neck so the drops don't just run down the throat.

And after you put the drops in, you need to keep the child in that position for about one minute.

That sounds tricky with a baby.

It is, but it allows the medication to actually contact the nasal tissue rather than just being swallowed.

And rectal meds.

Not the most popular route, obviously, but necessary if a child is vomiting and can't keep oral meds down.

The key here is the hold.

After you insert the suppository.

And you use your pinky finger for a baby.

Right.

Your pinky finger, because your index finger is too big, after you insert it, you have to hold the buttocks together.

For how long?

For five to ten minutes.

Wow.

That seems like a long time to hold a squirming baby.

It feels like an eternity.

But if you don't, the rectal sphincter will just expel it immediately.

It stimulates a bowel movement.

You have to wait for it to melt and absorb.

Let's move to the part everyone dreads.

Injections.

Needles.

The biggest source of anxiety.

First tip.

EMLA cream.

It's a topical anesthetic.

Put it on the site one to four hours before the shot.

It numbs the skin.

So it takes away the pain of the poke.

It doesn't help with a deep muscle ache, but it stops that initial sharp poke, which helps a lot with the fear.

Now, where do we poke?

In adults, we usually think of the arm or the butt.

In babies and toddlers, the gold standard is the vastus lateralis.

That's the big muscle on the side of the thigh.

Why the thigh?

Because it's the largest muscle mass they have.

Babies kick.

They develop strong thighs.

Their deltoids and their arms are tiny, just too small to absorb the fluid safely.

And what about the dorsogluteal, the butt?

We strictly avoid that in young children.

Is that because of the sciatic nerve?

Exactly.

The muscle isn't developed enough to reliably cover and protect the sciatic nerve.

If you hit that nerve, you can cause permanent damage, even paralysis.

So you stick to the thigh until they are walking well and have more muscle definition.

And there is a note here about aspiration.

I was taught years ago that when you give an IM injection, you stick the needle in, pull back on the plunger to check for blood, and then inject.

That practice has actually changed.

The CDC guidelines now say for immunizations in most IMs, you do not need to aspirate.

Really?

Why the change?

Well, it adds pain.

It adds time, which creates more anxiety.

And if you are in the correct anatomical site, like the vastus lateralis, the risk of hitting a large vessel is negligible.

So the new way is better for the patient?

It's faster and kinder.

Just dart it in at 90 degrees and inject.

And subcutaneous shots, like insulin?

That goes into the fatty tissue, back of the arm, anterior thigh, or abdomen.

The angle changes here, usually 45 degrees or 90 if the child has more subcutaneous fat.

And for things like insulin, site rotation is absolutely key to prevent scar tissue.

Good to know practice is evolving.

Let's talk about the big leagues.

Intravenous therapy.

4 Vs.

This is challenging because kids have tiny veins and they move.

A lot.

The source mentioned scalp veins for infants.

That looks terrifying to parents.

It does.

Seeing a needle in your baby's head is scary.

Parents often think you're going into the brain.

You have to explain that it's just a superficial vein.

But why there?

Functionally, it's a great site.

Scalp veins have no valve, so they are easy to thread.

And once it's taped down, it's actually easier to secure than a hand that the baby is constantly waving around or putting in their mouth.

Speaking of securing, we have to protect the site.

We can't just tape it and hope.

No.

We use arm boards, which are padded splints to keep the joint from bending.

And IV houses.

IV houses.

That sounds cute.

It's a clear plastic dome.

It looks like half a cup that goes over the IV site.

It protects it from bumps and from little fingers picking at the tape.

But importantly, it's clear so you can still see the skin to check for problems without taking the bandage off.

And we have to be hyper vigilant about fluids.

You can't just hang a bag and walk away.

Never.

Fluid overload is a real, real danger.

A child's heart and kidneys just can't handle excess volume.

We use the holiday cigar method to calculate maintenance fluids.

Walk us through that.

The math is specific.

It's the 150 -20 rule.

It works like a tax bracket.

For the first 10 kilograms of the child's weight, they get 100 millirels per kilogram per day.

Okay.

First 10 kilograms is 100 per...

For the next 10 kilos, so from 11 to 20 kilos, they get 50 millibarrels per kilogram.

Okay.

And for any weight over 20 kilograms, it's 20 millirels per kilogram.

So if a child weighs 25 kilograms?

Right.

The first 10 kilograms gives you a thousand millirel.

The next 10 kilograms adds another 500 millirels.

So that's 1500 millirels so far.

Got it.

The remaining 5 kilograms gets 20 millirels each, which is another 100 millirel.

So the total is 1600 millirels for the day.

That is surprisingly logical.

And to ensure we don't accidentally give that all in an hour...

We use infusion pumps, always.

Smart pumps with drug libraries are standard now.

They have hard limits programmed in, so you can't accidentally program a rate that would drown a child's system.

It'll beep and stop you.

You check the site hourly.

Hourly.

You are looking for infiltration.

Where the fluid leaps into the tissue, it looks cool and puffy.

Or phlebitis, red and hot.

Kids' veins are fragile.

They blow easily.

If you miss an infiltration, you can cause tissue necrosis.

It's serious.

Before we wrap up the technical stuff, central lines.

For long -term access, like chemo or long antibiotic courses, you have PICC lines in the arm or ports implanted in the chest.

The big takeaway here is infection prevention.

Clavier central line associated bloodstream infections.

We treat these lines like gold.

Sterile technique.

Bundles of care.

If a bug gets in that line, it goes straight to the heart.

It's life -threatening.

You scrub the hub every single time.

This brings us to the final piece of the puzzle.

The parents.

You aren't just treating the child.

No.

The family is the unit of care.

And adherence is the challenge.

You send them home with antibiotics.

But maybe it tastes bad, or it's expensive, or the schedule is impossible.

So how do we fix that?

Education.

But not just talking at them.

We use the teach -a -back method.

With that.

You explain how to drop the meds.

Then you don't just say, do you understand?

Because they will always say yes, to be polite.

You hand the syringe to the parent and say, now you show me.

Put them in the driver's seat.

Exactly.

You make them demonstrate it.

You'd be amazed how often a parent nods and says, I understand.

But then holds the syringe upside down or measures the wrong line.

Teach -a -back catches those errors before they leave the hospital.

And you have to assess their health literacy.

Can they read the label?

Do they understand what twice a day really means?

Right.

Does twice a day mean at breakfast and dinner?

Or does it mean strictly every 12 hours?

Those details matter.

And coordinating with schools.

That's a whole other layer.

Oh, it's a logistical web.

If the kid needs meds at lunch, you need the original pharmacy bottle.

You can't just send a baggie of pills.

You need the right form signed by the doctor.

You need the school nurse in the loop.

It takes planning.

Wow.

We have covered a massive amount of ground today.

From gastric pH to plastic IV houses to school forms.

It's a comprehensive chapter for a reason.

It covers the whole spectrum of care.

Let's do a rapid fire recap.

If you take away four big things from this dive, what are they?

One, physiology matters.

Kids absorb, metabolize, and excrete differently.

The acid is lower.

The water is higher.

The liver is unpredictable.

They aren't just small adults.

Safety is paramount.

The six rights, accurate weights and kilograms only, and double checking those high or late meds with a second nurse.

No exceptions.

Psychology is your tool.

Use play for toddlers.

Simple choices for preschoolers.

Honesty for everyone.

If you win their trust, you win the battle.

Anatomy dictates technique.

Thighs for baby shots.

Earlobes down and back for little ones.

Know the body you are touching.

Finally,

remember that you are the advocate.

Whether it's catching a math error or holding a hand during a scary procedure, your presence changes the outcome.

You are the barrier between the child and harm.

I love that.

And here is a thought to leave you with.

When you learn to observe a child, this closely, to notice if their fontanel is bulging or if they are guarding their arm or if their coloring changes after a med, you become a better observer of all patients.

The nuance you learn in pediatrics sharpens your skills for geriatrics, for critical care, for everything.

Because you stop looking at the monitor and start looking at the person.

That is the absolute truth.

Thank you for joining us on this deep dive.

To all the nursing students out there sweating over these calculations, you got this.

Good luck on your exams and your clinicals.

You're doing important work.

Keep learning.

For the Last Minute Lecture Team, signing off.