Chapter 28: The Child With a Condition of the Blood, Blood-Forming Organs, or Lymphatic System

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You know, usually when we talk about a medical diagnosis, there's this expectation of, I don't know, visual precision.

Right, yeah.

It's like engineering.

Exactly.

Like, you break your arm, they take an x -ray and it shows that jagged white line and the doctor just points and says, you know, there it is.

It's binary.

It's visible.

Broken or not broken.

Right.

It's clean.

But then you step into the world of pediatric hematology, into the blood and the lymphatic system, and suddenly that x -ray machine is just,

what's useless.

Completely useless.

Yeah.

We're looking at a diagnostic landscape that is like entirely hidden inside the vessels.

It is the absolute definition of diagnostic muddy waters.

I mean, you can't see a platelet dropping.

You can't see a red blood cell changing its shape in real time.

No, you can't.

You only see the clinical fallout of those microscopic failures.

And, you know, if you are listening to this deep dive, you are likely a nursing student gearing up to master exactly that spotting the fallout.

Which is a huge task.

It is.

So today our mission is to take this incredibly dense physiology from chapter 28 of Leifert's introduction to maternity and pediatric nursing

and map it directly to the bedside.

Because we have to understand how the factory works before we can understand why a child with just like a simple virus might suddenly develop head -to -toe bruises.

Or why switching a baby to whole cow's milk could silently push them into heart failure.

Exactly.

So how are we breaking this down today?

Well, we're going to build a solid foundation first.

We'll look at how a child's blood and lymphatic systems are actually supposed to function normally.

That baseline.

Right.

Because once you understand that baseline, your clinical reasoning just naturally kicks in.

We'll explore what happens when the three main cellular components, you know, the red blood cells, platelets, and white blood cells, when they malfunction.

Okay.

And then most importantly, we'll connect those physiological disruptions to your actual role as a nurse.

So safe care, family education,

and navigating the emotional complexities of chronic and terminal illness.

Okay.

Let's unpack this baseline then.

If we're going to spot the abnormalities, we need to know where this blood is actually coming from.

And I was, I mean, I was fascinated to learn that the factory actually moves around the body and the child grows.

Oh, it's an amazing physiological journey.

I mean, hematopoiesis, the actual formation of blood, it starts very early, like in the yolk sac during the second week of gestation.

Wow, exactly.

Yeah.

And then it shifts to the fetal liver.

By the time a child is born, the manufacturing plant has moved into the marrow of the long bones, so the tibia and the femur.

Right.

But as that child hits adolescence and those long bones stop growing, production shifts one final time to the flat bones, the ribs, the sternum, the pelvis.

And what actually tells the factory to turn on?

Like what flips the switch to start producing?

It's all about a hormone called erythropoietin.

In the fetus, the liver produces it.

But at birth, there is this massive systemic shift and the newborn's kidneys take over the production of erythropoietin.

And because of that sudden high level of erythropoietin, plus, you know, the placental shift of blood during birth,

newborns actually start out with very high hemoglobin and red blood cell counts.

They do.

Their total blood volume is sitting right around 85 milliliters per kilogram of their weight.

But despite all that blood volume, they are born with this glaring dangerous deficiency right out of the gate.

They have like virtually no vitamin K.

Yes.

And vitamin K is the absolute essential building block the liver needs to synthesize clotting factors.

Is their gut a sterile, right?

Exactly.

The newborn gut hasn't started producing its own vitamin K yet, so their levels are dangerously low.

And that is why every single newborn gets an immediate vitamin K injection.

Without it, they're at a massive risk for hemorrhagic disease.

Exactly.

Now, what about the lymphatic system?

Because looking at figure 28 .1, I feel like every parent panics the first time they feel swollen glands on the side of their toddler's neck.

Oh, definitely.

Which is completely understandable.

But if we connect this to the normal developmental baseline,

enlarged tonsils and adenoids are actually entirely normal.

Oh, really?

Yeah.

They're even in preschool and school age children.

It's just a vital part of their body's developing defense mechanism as they're exposed to the world.

That makes sense.

We also see heightened activity in the thymus gland.

In newborns, the thymus is crucial for developing T cell immunity.

Which perfectly explains why premature infants are at such a profoundly high risk for viral and bacterial infections, right?

Because their thymus simply hasn't had the time to mature that T cell activity.

You nailed it.

And we can't forget the spleen.

So to recap the normal formed elements of the blood from figure 28 .2, you've got your erythrocytes, the red blood cells transporting oxygen.

You've got leukocytes, the white blood cells fighting infection and thrombocytes, the platelets handling the clotting.

So the spleen acts as like the ultimate meeting ground for all this.

Right.

It's the largest lymphatic organ and its primary job is to slowly filter the blood, bringing it into direct contact with those fighting lymphocytes.

So when a child contracts a severe infection or has a blood disorder where cells are being destroyed, the spleen just works over time.

Precisely.

It physically expands to handle the workload, which is what we call splenomegaly.

Okay.

So that's the normal factory.

But here is the bridging question for our clinical pathology.

If a baby has such incredibly high red blood cells at birth, why do they so often develop anemia later in their infancy?

Because of growth.

And well, what happens when the body literally runs out of building blocks?

Oh, right.

The infant grows so rapidly that they completely outgrow the iron reserves they initially absorbed from their mother during the third trimester.

And if they're born prematurely, those initial reserves are even smaller to begin with.

Exactly.

Which brings us perfectly into section two, the anemias.

When red blood cells run low or are shaping,

iron deficiency anemia is like the single most common nutritional deficiency in children in the US.

That is.

And the peak times make sense nine to 24 months and adolescence.

Both are periods of massive, rapid physical growth.

But here's where it gets really interesting to me.

The reading explicitly lists whole cow's milk as a major culprit for infant anemia.

Oh, yeah.

This is huge.

Because culturally, we are taught that milk is the ultimate healthy drink for growing kids.

So why is it causing anemia?

It's a fantastic example of why nurses have to dig deeper into nutritional counseling.

First, cow's milk is naturally extremely poor in iron.

OK.

But worse, it actively works against the body.

High levels of calcium physically block the absorption of whatever small amounts of iron the child is getting from other foods.

Oh, wow.

And there's a third, more insidious factor.

If parents rely too heavily on cow's milk to fill up a fussy baby to avoid mealtime battles, the proteins in the cow's milk can irritate the intestinal lining.

It actually precipitates gastrointestinal microbleeding.

Wait, really?

So the infant is bleeding tiny, invisible amounts into their GI tract, slowly losing what little iron they actually have, while simultaneously being blocked from absorbing more.

Yeah.

That is a massive double hit.

So if you were the nurse,

what are your interventions here?

You have to replace the iron usually with an oral supplement like ferrous sulfate.

You want to administer it two or three times a day, specifically between meals.

Why between meals?

Because that's when the digestive stomach acids are at their highest, which aids absorption.

And you always want to give it with a source of vitamin C, like a few ounces of orange juice.

Because that acts as a catalyst to boost the absorption.

Exactly.

And you never, ever give it with milk.

And if it's a liquid preparation, you have to use a straw, right?

Yeah.

Otherwise, it will permanently stain the child's developing teeth.

Right.

Place the straw at the back of the mouth,

and you must proactively warn the parents about diaper changes.

Or the stool color.

Yeah.

The child's stool is going to turn a very specific tarry green or black color.

And as a nurse, you want to hear this.

Because if the stools aren't black,

it's a major clinical clue

that the parents might not be complying with the therapy.

Exactly.

Also a vital safety alert here.

Iron can be highly toxic in large doses, so it must be locked away safely.

Right.

And if a child's anemia is so severe that you have to give iron intramuscularly, you must use the Z -Track injection method.

Because that pulls the skin and seals the medication deep in the muscle, preventing severe tissue irritation and that permanent skin staining.

You got it.

Okay.

So that's what happens when you don't have the building blocks.

But what if the blueprint itself is flawed from the moment of conception?

Let's talk about sickle cell disease.

Okay.

So sickle cell is an inherited genetic defect in the blueprint for hemoglobin.

Instead of producing normal hemoglobin A, the child produces an abnormal fragile form called hemoglobin S.

And we really need to differentiate the trait from the disease here, because the clinical picture is entirely different.

It's a crucial distinction for a nurse.

Sickle cell trait means the child is merely a carrier.

They inherited the defective gene from only one parent.

So their blood is just a mix of normal and abnormal hemoglobin.

Right.

They are completely asymptomatic, their lab counts are normal, and they just need genetic counseling for when they eventually have children.

But sickle cell anemia,

the active disease that happens when they inherit the defective gene from both parents.

And there's a one in four chance of this happening with every pregnancy if both parents are carriers.

The wild thing looking at figures 28 .3 and 28 .4 is that symptoms don't usually show up until the end of the child's first year of life.

Right.

Because fetal hemoglobin is still hanging around in their system, acting as a buffer.

But when that fetal hemoglobin finally fades, well, I was trying to picture this mechanically.

Normal red blood cells are perfectly round and flexible, right?

Like little rubber inner tubes floating easily down a lazy river of a capillary.

That's good visual.

But a sickled cell looks like a sharp, rigid crescent moon.

And when oxygen drops or the child gets dehydrated, it's like throwing a bunch of crescent -shaped bumper cars into those tiny capillaries.

That's exactly what it's like.

They catch on each other, they interlock, they clump up, and they cause a massive impenetrable traffic jam.

And the downstream effect of that traffic jam is devastating.

It completely blocks fresh oxygen from getting to the surrounding tissues.

Which is ischemia.

Yes.

And it is excruciatingly painful.

This is the physiological driver behind the sickle cell crises in table 28 .1.

The most common is the vasoclusive crisis.

This is your traffic jam.

Right.

It causes severe abdominal pain.

And in young kids, a classic sign is dectolytis, which is incredibly swollen, painful hands and feet.

It also puts the child at an exceptionally high risk for a stroke if those cells clump in the brain.

But then there's splenic sequestration, which just sounds like an absolute nightmare scenario.

It is a rapid medical emergency.

Instead of just clumping in small capillaries, massive amounts of the child's blood suddenly pool and become trapped in the liver and the spleen.

So the spleen becomes massively enlarged.

Yes.

But more importantly, because all the blood volume is sequestered there, the child's circulating blood volume just plummets.

Oh, wow.

They are thrown into profound circulatory collapse and hypovolemic shock.

It can be fatal within hours.

So when a child with sickle cell comes through the hospital doors in a crisis,

what does this all mean for your nursing care?

Your priorities are mechanical.

Number one is aggressive hydration.

You have to add fluid volume to the river to try and break up that bumper car traffic jam and keep the blood flowing.

Okay, hydration.

Number two is tissue oxygenation.

And number three is aggressive pain control.

We are talking scheduled morphine or a PCA pump for older kids.

Right.

And here is a massive safety tip.

You will see kids in intense joint pain, but you must never ever use cold compresses.

Really?

Why no cold?

Because cold promotes vasoconstriction, which shrinks the vessels and actively promotes more sickling and worse ischemia.

Oh, that makes total sense.

What about medications to actually prevent the sickling?

The text mentions hydroxyurea.

Hydroxyurea is fascinating.

It actually tricks the body into increasing the production of that protective fetal hemoglobin again, which doesn't sickle.

Wow, that's clever.

It is.

It also physically makes the red blood cells larger and less sticky.

Additionally, these kids almost always need prophylactic penicillin regimens to prevent systemic sepsis.

Because their spleen usually sustains permanent damage from repeated sickling episodes, right?

So it loses its ability to fight basic infections.

Exactly.

Well, that brings us to the other major blueprint error,

thalassemia.

Right.

So thalassemia is an inability to produce sufficient adult hemoglobin, specifically the beta chains.

And thalassemia major, which is also known as Cooley's anemia, is the most severe form.

Yes.

The red blood cells that are produced are wildly abnormal and are rapidly destroyed by the body, causing a state of chronic severe hypoxia.

And the body completely panics.

The tissues are basically screaming, we need more oxygen, make more red blood cells.

Exactly.

The bone marrow goes into an absolute overdrive trying to compensate.

It's churning out these defective cells so fast that the bone marrow space itself physically expands.

And figure 28 .5 shows this, right?

You'll actually see this visually in the child's face.

You will.

The overgrowth of the marrow causes maxillary hyperplasia.

The upper jawbones overgrow, causing the cheekbones to become prominent and the teeth to protrude.

It's a very striking clinical cue.

So to keep these kids alive, they require frequent,

lifelong blood transfusions.

But that introduces an entirely new physiological wall.

Hemocytoresis.

Every single time you administer a blood transfusion, you are infusing a massive load of iron.

And the human body has no natural mechanism to excrete large amounts of excess iron.

None at all.

So it just starts dumping it into the tissues, depositing it in the heart muscle, the liver, the pancreas.

Over time, the child's skin takes on a distinct muddy bronze color.

So as the nurse, you have to find a way to artificially pull that iron out.

Yes.

Through chelation therapy, we administer medications like oral defrosterox or IV defroximin.

And those drugs actively circulate, bind to the free iron molecules in the blood, and create a compound that the kidneys can safely filter out and excrete in the urine.

You've got it.

Okay, so we've covered the oxygen delivery system of the red blood cells.

Now let's pivot in section three to the body's emergency sealants, the platelets, and the clotting factors.

Right, the bleeding disorders.

What happens when a toddler learning to walk takes a completely normal tumble, but their blood simply cannot clot?

Let's start with hemophilia A.

Hemophilia A is a specific deficiency in coagulation factor VIII.

It's a sex -linked recessive trait.

Meaning the defective gene is carried on the X chromosome.

Right.

It almost exclusively affects males, though females are the carriers.

What is the classic symptom that a nursing student needs to spot instantly here?

Hemarthrosis.

This is bleeding directly into the joint cavity, so the knees, the elbows, the ankles.

That sounds awful.

It is.

The pressure buildup from the blood pooling in that tight space causes immense agonizing pain.

If not treated quickly,

repeated bleeds destroy the joint cartilage, causing permanent deformity or a permanently stiff fused joint, which is called ankylosis.

So your primary nursing interventions are grounded in rice, right?

Rest, ice, compression, elevation.

Exactly.

Then you administer synthetic factor VIII replacements, or a nasal spray called DDAVP, which acts as a stimulant, forcing the body to release any stored factor VIII that might be hiding.

Yes.

And here is your critical medication safety alert for hemophilia.

Salicylates like aspirin and all NSAIDs are strictly contraindicated.

Because those medications inherently inhibit platelet function.

Right.

These kids are already missing a clotting factor.

They desperately need their platelets to function perfectly to compensate.

That makes a lot of sense.

And you also need to heavily educate parents to physically pad toddler clothes at the knees and elbows to protect their joints when they're inevitably falling while learning to walk.

Exactly.

Just simple modifications.

Now contrast that genetic deficiency with idiopathic thrombocytopenic purpura, or ITP.

This isn't a missing factor.

This is friendly fire.

It really is.

ITP is an acquired autoimmune disorder.

Usually a couple of weeks after a perfectly standard mild viral infection, the child's immune system just gets confused.

It mistakenly starts manufacturing antibodies that coat its own healthy platelets.

The spleen spots these coated platelets, assumes they are foreign enemies, and aggressively destroys them.

And the platelet count completely tanks, dropping below 20 ,000.

Fast.

And this is where you have to be a detective as a nurse, because you will see a very specific escalating progression on the child's skin.

Yes.

The dermatology definitions are key here.

Right.

So it might start with petechia, those tiny pinpoint non -blanching red dots where microscopic capillaries have just leaked.

Yep.

If those tiny dots cluster together, you get purpura.

Then you might see larger flat isolated bruises, which are your ecchymosis.

And as a nurse, you are watching closely to see if these escalate into large raised hematomas.

Because that tells you the internal bleeding is significant.

Exactly.

And here is a difficult but critical nursing tip.

Because these kids suddenly appear in the clinic covered in bruises of all different stages and sizes, ITP must be carefully distinguished from physical child abuse.

Oh man.

That's heavy.

It is.

You have to take an incredibly thorough non -judgmental history.

I have to ask though,

my nursing instinct says if their platelets are destroyed and their counts are dangerously under 20 ,000, why not just hang a bag of donor platelets and transfuse them?

It's a logical thought, but because of the clinical pathophysiology we just discussed, it just won't work.

Why not?

Because the child's immune system is actively producing a relentless stream of anti -platelet antibodies.

If you infuse donor platelets, the child's spleen will simply destroy those two within hours.

Oh, it's just a waste of a precious resource.

Exactly.

Instead, you have to focus on treating the autoimmune response itself.

You administer high dose steroids or IV gamma globulin IVA.

And how does that work?

The IVE works by temporarily overwhelming and distracting the spleen, keeping it busy so the child's own newly produced platelets have time to survive and recover.

Oh, that's clever.

Yeah.

And during this entire process, your absolute priority is monitoring for neurological changes because the single greatest danger of a platelet count that low is spontaneous intracranial bleeding.

Just to quickly contrast, the text also mentions IgA vasculitis or Henna -Schönlein purpura.

Yes, that's another autoimmune condition, but it's an inflammation of the blood vessels themselves, causing distinct raised purpura, usually on the lower legs and buttocks.

But the key difference for your clinical reasoning is that in IgA vasculitis, the platelet count is entirely normal.

Right.

It's a vessel wall problem, not a platelet problem.

Okay.

We see what happens when the body lacks the building blocks for blood and when the clotting factors fail.

But moving to section four, what happens when the very cells designed to protect the child, the white blood cells mutate, multiply out of control, and turn against the bone marrow itself?

We are talking about leukemia, specifically acute lymphoblastic leukemia, or AIL, which is the most common childhood cancer.

I initially thought of these cancerous cells like unruly party crashers, but looking at the path of physiology, it's actually much more insidious.

It's like aggressive weeds in a small garden.

Oh, that's a brilliant way to look at it.

Right.

These immature white blood cells, the blasts, they multiply so fast and take up so much space that they completely choke out the roots of the healthy plants.

The normal red blood cells in the platelets literally get starved out of existence in marrow space.

That is the perfect biological metaphor.

And as a nurse, that weed takeover dictates your four priority clinical challenges.

Okay.

Break this down.

Number one is anemia because the red blood cells are choked out.

Number two is infection because even though the marrow is packed full of white blood cells, they are neutropenic, immature blasts that are completely useless at fighting actual bacteria.

Right.

Number three is bleeding because the platelets are starved out.

And number four is fractures.

Because the sheer massive physical volume of the cancerous cells pushing against the inside of the bone physically weakens the bone marrow space.

To officially diagnose it, they have to go in and look at the marrow, right?

You do a bone marrow aspiration.

Interestingly, figure 28 .7 shows that in children, this is typically done on the iliac crest of the pelvis, not the sternum like in adults.

Yes.

And once diagnosed, the nursing care requires meticulous attention to the smallest details.

Take mouth care, as shown in figure 28 .6.

Because the child has no healthy white cells to fight off standard everyday mouth bacteria, their gums bleed easily and ulcerate into incredibly painful lesions.

So you have to use ultra soft sponges, a gentle water pick, and a mild mix of hydrogen peroxide and saline.

Exactly.

You absolutely never use commercial alcohol mouth washes because they destroy the normal flora and invite severe fungal overgrowth.

And because their immune system is essentially wiped out from both the disease and the chemotherapy, you have to halt all routine live immunizations.

Yes, that is vital.

If a leukemic child is exposed to something as common as chicken pox, it is no longer a childhood rite of passage.

It is a life -threatening emergency.

They require an immediate injection of specific immunoglobulin to survive it.

That's terrifying.

Furthermore, because of the profound anemia and thrombocytopenia, these kids will need constant, frequent transfusions of packed red blood cells and platelets.

They will.

And as a nurse, the safety of that transfusion falls squarely on your shoulders.

You physically check the blood type and patient ID with a second licensed professional.

Standard protocol.

You always run the blood through a specific filter to catch clots.

And a massive non -negotiable safety alert, you never ever add any medications to a bloodline.

But what if your patient starts having a reaction?

Say they develop sudden chills, severe itching, a rash, a fever,

or deep lower back pain.

You stop the blood infusion immediately.

That is step one before anything else.

But you absolutely do not pull the IV catheter out.

Because you need that access.

Exactly.

You keep the vein open by quickly flushing and running normal saline through the line and you immediately notify the charged nurse or physician.

And you have to stay with them, right?

Yes.

Most severe hemolytic reactions happen within the first 10 minutes of the infusion, which is why you must stay in the room with the patient during that initial window.

To close out the malignancies, we should briefly touch on Hodgkin disease or Hodgkin lymphoma.

Right.

This is a malignancy specifically of the lymph system.

And it typically presents in adolescence as a completely

painless enlarging lump in the neck or under the arm.

And the diagnostic marker that every nursing student needs to permanently commit to memory is the presence of giant multi -nucleotid cells called Reed -Sternberg cells under the microscope.

Yes.

If you see Reed -Sternberg, you immediately think Hodgkin's.

Okay.

So moving to section five, we spend so much time focusing on the pathophysiology, the lab values and, you know, managing the IV pumps.

But you can't truly care for a pediatric patient without understanding where their mind is.

You really can't.

Especially when they're facing a chronic life -altering illness or when a cure simply isn't going to happen.

It's the art of nursing.

Chronic illness severely disrupts normal developmental milestones, as we see in table 28 .3, and it happens in a predictable heart -wrenching way.

How so?

Well, toddlers whose primary drive is autonomy lose their sense of independence.

Physical restrictions delay their motor skills and their toilet training.

School -age kids feel a profound sense of inferiority because they're constantly pulled out of school, they lose grade levels, and they can't compete physically with their peers.

And adolescents whose entire psychological job is to form an independent identity feel a total loss of control.

Exactly.

They often rebel by flatly refusing their life -saving medications just to assert some power over their lives.

Which means your nursing care plan has to extend far beyond the medication schedule.

You have to find ways to integrate the child into the community, keeping them connected to peers rather than isolating them in a sick role.

Yes.

And you also have to aggressively advocate for the parents by arranging respite care.

Which is absolutely essential.

It really is.

It provides specialized, trained workers to take over the complex medical care temporarily.

It allows the parents to just go to the grocery store alone or have a normal evening together to preserve their marriage.

As a nurse, you have to remind them that they cannot pour from an empty cup.

Which brings us to the heaviest, most demanding part of this specialty.

The dying child, covered in nursing care plan 28 .1 and box 28 .1.

How does a nursing student even begin to prepare for the emotional weight of standing at the bedside of a child who is not going to survive?

You can't just memorize a lab value for that.

No, you can't.

The most critical intervention the text demands is rigorous self -exploration.

How you, as the nurse, have processed your own personal losses and fears will directly dictate your ability to relate to a dying patient.

That makes sense.

If you bury your emotions, they form an invisible wall between you and the family.

You need an active, vocal support system, and you must learn the practice of compassionate detachment.

Knowing how to care deeply while still stepping back to revitalize your own spirit.

You also have to adapt to how children view death because it shifts drastically with age.

It does.

Kids under five primarily fear separation and abandonment from their parents.

They often view death as a temporary, reversible state,

like going to sleep or taking a trip.

Right.

But by the time a child is nine or ten, they fully grasp biological finality.

They know what it means.

And here is the most striking, sobering research finding.

Terminally ill children almost always know they are dying, even if the adults around them are desperately, painfully trying to hide it.

It shows up in their play, in their artwork, in the questions they ask.

Failing to be honest with these children doesn't protect them.

It just forces them to suffer their immense fear completely alone, unable to express their anxieties or even say a proper goodbye to the people they love.

So what does bedside care actually look like in those final days?

You manage their physical pain aggressively.

You do not ever under -medicate a dying child out of some misplaced fear of causing addiction.

You allow the child to grieve in their own way.

If they are sulky, angry, or cranky, you let them be.

For the parents, you give them explicit, gentle permission to talk about the impending death and even funeral arrangements if they choose.

It often relieves the suffocating anxiety of pretending everything is fine.

And you never forget the siblings.

You must explicitly assure them that the illness is not their fault, because young minds often engage in magical thinking, believing a past argument caused the sickness.

You must include them in the care and the goodbyes.

It's incredibly heavy, but it is the absolute essence of what it means to be a nurse.

Being present, capable, and steady in the hardest moments a family will ever face.

It really is.

Which leaves us with a final, provocative thought to carry into your clinical rotations.

Consider this.

How do your own unresolved feelings about loss, about the unpredictable fragility of life, and about your own mortality secretly affect your ability to stand at the bedside of a dying child?

Wow.

You cannot be fully present to hold space for their profound grief if you are still running from your own.

That is so true.

Thank you for studying with us from the Last Minute Lecture Team.