Chapter 36: Musculoskeletal Disorders

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Welcome to the Deep Dive.

Today we're jumping into a really, really important topic,

musculoskeletal disorders in children.

That's right, and we're using chapter 36 of the Saunders Comprehensive Review for the NCLE -XPN Examination Seventh Edition as our guide.

Think of this as us digging through all that dense information, pulling out the absolute must -know stuff about these conditions for you.

Exactly.

We know you want the key info efficiently, but without missing the crucial parts.

So we'll be hitting the main concepts, assessment points, interventions, and of course safety protocols.

Our mission really is to equip you with a solid practical understanding of these common pediatric musculoskeletal issues.

And don't worry, if some terms are new, we'll define things as we go.

Absolutely.

Okay, where should we start?

Let's kick off with developmental dysplasia of the hip,

DDH.

What is that in simple terms?

Okay, DDH.

Basically, it's when a baby's hip joint doesn't form quite right.

This can happen before birth, during infancy, or even in childhood.

So the ball part of the thigh bone?

Yeah.

The femoral head?

Right, the femoral head isn't sitting securely in the socket, which is called the acetabulum.

It's like a ball not quite fitting snugly in its cup.

And the chapter mentions different degrees of this?

Yes.

Box 36 to 1 breaks it down into three degrees.

First, acetabular dysplasia or prelexation.

This is the mildest form.

The socket's a bit shallow, but the femoral head is still generally in place.

Okay.

Then there's sublexation.

That's a partial dislocation.

So the femoral head is in the socket, but it's loose and can slip partway out.

And the most severe?

That's dislocation.

The femoral head is completely out of the socket.

Got it.

So how would we spot this?

What are the signs, especially in a brand new baby?

In newborns, you might notice just a general looseness or laxity in the hip ligaments.

The joint might feel a bit unstable.

And what if it's not picked up right away?

What about slightly older infants?

As they get a bit older, other signs become clearer.

You might see that one leg looks shorter than the other.

That's the Gagliazzi or Alice's sign.

Okay.

Shortening on the affected side.

Yes.

Also, restricted hip abduction.

When the baby's lying down with knees and hips bent, the affected hip won't spread outwards as easily or as far as the other side.

Make sense.

And check the buttock creases the gluteal folds.

When the baby's prone with legs straight, the folds might look uneven.

The chapter talks about two specific tests, too.

Ortolani and Barlow.

They sound very important diagnostic maneuvers.

The Ortolani test tries to feel if a dislocated hip can be put back in.

You gently abduct the thigh, moving it outward, while applying a little forward pressure on the greater trochanter, that bony part on the side of the hip.

And what are you feeling for?

A positive sign is a distinct clunk sensation.

That's the femoral head slipping back into the socket.

It means the hip was dislocated and you just reduced it.

Okay.

A clunk means it went back in.

And the Barlow test.

The Barlow test does the opposite, sort of.

It checks if a hip that is in the socket can be easily pushed out.

You would duct the hip, bring it towards the midline, while applying gentle downward and backward pressure.

And a positive sign there.

A positive Barlow is feeling the femoral head actually slip out of the acetabulum.

It indicates instability.

Figure 36 to 1 in the chapter shows these signs visually, which is helpful.

Right.

What if DDH missed entirely in infancy?

What signs might appear in older babies or toddlers?

You might still see that leg length discrepancy.

You could also feel the femoral head moving up and down in the buttock if you gently push and pull the thigh.

Okay.

And once a child is walking, you might see a positive Trendelenberg sign.

When they stand on the affected leg, the pelvis on the normal side actually drocks down.

Instead of lifting slightly, like it should.

Exactly.

You might also notice the Truecanter seems more prominent.

And if it's bilateral DDH, both hips affected, you might see significant lordosis, that swayback posture, or a waddling gait.

Right.

So that's how we identify it.

How is DDH treated?

Treatment really hinges on the child's age at diagnosis.

For newborns up to about six months, the go -to is usually the Pavlik harness.

I've seen those.

It's like a soft brace.

Yes.

Figure 36 -2 shows it.

It holds the baby's hips in flexion -bent abduction apart and external rotation.

The goal is to keep the femoral head in the socket so the acetabulum can develop more normally around it.

How long do they typically wear it?

Usually for about three to six months, often pretty much 24 -7 initially.

And if the diagnosis happens later, say between six and 18 months?

Then the approach changes.

Often they'll start with gradual reduction using traction first.

Then, usually under anesthesia, a closed reduction manipulating the hip back in, or sometimes an open reduction, which is surgery if needed.

And after reduction?

After the hip is back in place, they'll likely be put in a hip spica cast.

That's a big body cast immobilizing the hips and legs.

They'd be in that for maybe two to four months.

Wow, that's a long time.

It is.

And after the cast comes off, they often transition to a flexion -abduction brace for another few months to maintain that position.

What about older children, if it's found even later?

In older kids, it often requires surgery, an operative reduction, possibly even reconstruction of the hip joint itself.

It gets more complex the later it's found.

So, regardless of the method?

Yes, regardless of the treatment, parent education is absolutely critical.

We need to make sure parents understand how to care for the pelvic harness, the spica cast, or whatever device is being used.

That's a key nursing role.

Carefully.

Okay, let's move on to congenital clubfoot.

What's the definition there?

Congenital clubfoot is another birth defect, but it's a more complex foot and ankle deformity.

It involves several things happening at once.

The forefoot points inward, adduction.

The midfoot twists up, supination.

The heel turns inward, varus.

And the whole foot points down, kimonos.

Kind of like a golf club shape.

Sort of, yeah.

It can be in one foot or both.

The big treatment goal is to get a foot that's painless, stable, and plantigrade.

Plantigrade meaning?

Meaning they can stand and walk with the sole flat on the ground, heel down.

And it's important to know these kids need long -term follow -up right until they stop growing because clubfoot can sometimes recur.

Are there different classifications?

Yes.

We describe it based on the foot's position.

Talapase varus is that inward bending inversion.

Talapase valgus is the opposite bending outward aversion.

Okay.

Talapase equinus is the plantar flexion, toes pointing down lower than the heel.

And talapase cacanus is dorsiflexion, where the foot bends up at the ankle, toes higher than the heel.

How is clubfoot typically treated?

The key is starting treatment as soon as possible after birth.

The standard approach, often called the Ponsetti method, involves weekly sessions of gentle manipulation to stretch the foot towards correction, followed by applying a long -leg cast.

Weekly.

Why so often?

Because infants grow incredibly fast, so the manipulation and casting happens weekly for usually around 8 to 12 weeks.

If that works well, they transition to a special brace or splint, often worn mostly at night for several years to maintain the correction.

And if casting doesn't fully correct it?

If casting doesn't achieve good alignment by, say, 6 to 12 weeks, then surgery might be needed to release structures.

The chapter has a critical thinking box about a baby in a clubfoot cast.

What's the crucial point there?

Ah, yes.

That scenario highlights a major safety issue.

If an infant in a cast has toes that look pale or swollen and seems distressed when the toes are moved, that's a big red flag.

What does it suggest?

It suggests potential neurovascular compromise, poor circulation or nerve pressure.

The immediate nursing action is vital.

Notify the RN or primary healthcare provider right away.

Because it could be?

Compartment syndrome.

Swelling inside the cast cuts off blood flow and damages nerves.

It's an emergency.

Page 462 explains compartment syndrome itself in more detail.

Got it.

Critical to recognize those signs.

Let's shift now to idiopathic scoliosis.

What do we need to know?

Okay, idiopathic scoliosis.

It's a three -dimensional spine problem.

Most people think of the side -to -side curve, the lateral curvature, but it also involves which causes the ribs to become uneven and often thoracic hypokyphosis, meaning the upper back loses some of its normal outward curve.

And idiopathic just means we don't know the exact cause, right?

Correct.

It typically shows up during the pre -adolescent growth spurt.

That's why school screenings during those years are, well, really useful.

What are the treatment options?

It depends.

Treatment can be non -surgical, mainly bracing or surgical, like spinal fusion with rods or sometimes staples.

The choice really depends on how severe the curve is, where it is, the child's age, how much growing they have left, and any other health issues.

So it's individualized.

Very much so.

And no matter the treatment, long -term monitoring for curve progression is essential.

How do we typically spot scoliosis during an assessment?

A key screening is the Adam's forward bend test.

The child bends at the waist, arms hanging down.

You look for asymmetry in the ribs or flanks.

Like one side being higher than the other.

Exactly.

You might also see uneven hip height, uneven shoulders, or maybe a visible curve when they're just standing straight.

Sometimes even a leg length difference.

Radiographs, x -rays, confirm the diagnosis and measure the curve.

What's our role as nurses for kids with scoliosis?

Monitoring the curve, certainly.

Preparing the child and family if a brace is needed, explaining what it involves.

Same goes for surgery prep, if that's the route.

And the psychosocial aspect.

Oh, absolutely.

We need to be really aware of the potential impact on body image, self -esteem, maybe fear or anger, social isolation, especially with bracing or significant curves.

Addressing those feelings is a huge part of care.

Let's talk more about the braces.

You said they don't cure it.

Right.

Braces don't straighten the existing curve.

Their goal is to slow down or stop the curve from getting worse while the child is still growing.

How much do they have to wear?

It's usually often 16 to 23 hours a day, so compliance can be tough.

What are the key care points for brace wear?

Skin care is paramount.

Checking daily for redness or breakdown under the brace.

Keep the skin clean and dry.

Big point.

No lotions or powders under the brace.

They trap moisture.

Always wear a soft, seamless shirt underneath.

Reinforce prescribed exercises.

These help maintain muscle strength and, importantly, create space for the child to talk about how they feel wearing it, body image concerns, all of that.

If they do need surgery, the spinal fusion, what are the post -operative priorities?

Post -op, number one, is maintaining spinal alignment.

No twisting.

We use log rolling to turn them.

Keeping the spine straight like a log.

Exactly.

Neurovascular checks of arms and legs are critical checking sensation, movement, circulation.

Encourage deep breathing, coughing,

incentive spirometer used to prevent lung issues.

Pain management is obviously key.

Anything else specific to watch for?

Monitor for bladder issues like incontinence.

Watch for signs of infection.

And there's a specific, though less common, complication called superior mesenteric artery syndrome.

What's that?

It can happen due to anatomical shifts during surgery.

Basically, the artery can compress part of the intestine.

Look for vomiting, abdominal distension like a bowel obstruction.

If suspected, notify the

Got it.

And activity restrictions.

Yes.

There will be activity restrictions initially.

We teach them how to move safely like log rolling to sit up and help with ambulation.

And again, be alert for body image concerns even after corrective surgery.

All right.

Let's transition to juvenile idiopathic arthritis,

JIA.

JIA.

This is an autoimmune inflammatory disease.

The body's immune system attacks the joints, causing inflammation, pain, stiffness.

And it cartilage.

It's more common in girls.

And it's chronic.

There's no cure.

So treatment is focused on management.

Exactly.

Preserving joint function, controlling the inflammation, minimizing deformity, and just reducing the overall impact on the child's life and development.

How is that done?

It's usually a team approach.

Medications are key.

Physical and occupational therapy are vital.

And lots of patient and family education.

Surgery might be needed down the line for things like severe contractures or if legs grow unevenly.

How is JIA diagnosed?

Is there a specific test?

No single definitive test, unfortunately.

Diagnosis is often based on clinical signs and ruling out other things.

Lab tests can help support it like an elevated ESR or C -reactive protein showing inflammation, maybe high white blood cells.

What about imaging?

X -rays might show soft tissue swelling or joint space widening early on.

Later, can show bone erosion.

What are the classic symptoms we look for?

Box 36 -2 lists them, right?

Yes.

Things like joint stiffness, especially in the morning or after resting, that's called gelling.

Swelling, limited motion, warmth, tenderness, pain in the affected joints.

And the eye issue.

Very important.

Uveitis inflammation in the eye.

It can be asymptomatic initially, but can lead to serious vision loss or blindness if not caught and treated.

Regular eye exams by an ophthalmologist are absolutely essential for all kids with JIA.

So nursing interventions, what's our focus?

Supporting their social and emotional growth is huge.

Reinforcing medication instructions.

Box 36 -3 lists the types, like NSAIDs, metatrexate, biologics like TNF inhibitors, corticosteroids.

It's often a stepped approach.

And physical management.

Assisting with and teaching range of motion exercises is crucial to maintain joint function.

Encourage them to do their normal activities as much as possible.

Teach about using heat or cold packs for pain, splinting during flares, positioning joints neutrally.

Supporting the therapy plan.

Yes.

Reinforcing the importance of PT and OT, stressing those regular eye exams, and importantly, assessing how the family is coping with this chronic illness.

It involves grief, life changes.

We need to support them through that.

Okay.

Next up, Marfan syndrome.

Marfan syndrome.

This is a genetic disorder affecting connective tissue.

Connective tissue is like the body's glue and scaffolding, right?

Pretty much.

So Marfan affects multiple systems.

The skeleton, the heart and blood vessels, the eyes, the skin.

It's caused by a defect in the gene for fibrillin 1, a key protein for elasticity.

It can be inherited.

And like JIA, there's no cure.

What are the typical physical signs?

Often they're tall and thin with disproportionately long arms, legs, fingers and toes, or arachnidactyly they call it.

Spinal curves are common too.

And the other systems.

Vision problems are frequent lens dislocation is classic, but the most serious concern is cardiovascular.

The aorta, the main artery from the heart, can stretch and weaken, leading to aneurysm or dissection, which is life -threatening.

So interventions focus on monitoring and preventing complications.

Exactly.

Regular eye exams.

Monitoring the spine, especially during growth spurts.

Cardiac monitoring is crucial echocardiograms to check the aorta size.

Other medications?

Yes.

Often beta blockers or ARBs are prescribed to lower blood pressure and reduce stress on the aorta.

Lifestyle adjustments.

Definitely.

Avoiding competitive athletics and contact sports is usually recommended because of the cardiac risks.

They also need to tell dentists about their condition prophylactic antibiotics before procedures are often needed to prevent endocarditis, heart valve infection, and surgery.

Sometimes preventative surgery to repair or replace the aortic root is necessary if it gets too enlarged.

Okay, let's touch on leg calf perthid disease.

Leg cat perthes, this one affects the hip joint, specifically the head of the femur, the ball part.

What's the underlying problem?

It's an interruption of the blood supply to the femoral head.

This causes the bone tissue to die, a process called a vascular necrosis.

The bone can then collapse and flatten.

How does that typically present?

What do we see?

Limping is often the first sign.

Pain or stiffness might be felt in the hip, groin, thigh, or sometimes just the knee, and limited range of motion in that hip.

How is it managed?

The goal is to keep the femoral head as round as possible and contained within the hip socket while it heals and reforms.

Treatment can range from observation and activity restriction to physical therapy, stretching.

What about relieving pressure?

Crutch use to avoid weight bearing is common.

Sometimes bed rest or traction if pain is severe.

Bracing or casting might be used to hold the hip in a good position.

Does it always require intervention?

Not always in mild cases, especially in younger children who have more potential for remodeling.

But more severe cases might eventually need surgery, sometimes even hip replacement later in life, though that's less common in childhood.

Okay, last major topic.

Fractures in children.

Any key differences from adults?

Yes, a few.

Kids' bones are still growing, they have growth plates, and their periosteum, the outer layer of bone, is thicker and stronger.

This means they sometimes get different types of fractures, like green stick fractures where the bone bends and cracks but doesn't break all the way through.

And they heal faster.

Generally, yes, much faster than adults.

But fractures involving the growth plate need careful management to avoid growth disturbances.

Also, fractures in infants are rare and always raise a red flag for potential abuse or underlying bone disease.

What are the classic signs of a fracture?

Pain,

tenderness right over the spot, obvious deformity or angulation, swelling, bruising, ecomosis, muscle spasms around the area, loss of function, they won't want to use that limb, maybe crepitus, that gritty feeling or sound.

If you suspect a fracture out in the field or at home, what's the immediate priority action?

First, assess the whole situation, check the extent of injury, then immobilize the affected limb immediately.

Don't try to straighten it.

Support it above and below the suspected fracture site.

What if the bone is sticking out?

An open fracture?

Cover the wound with a sterile dressing if possible.

If not, use the cleanest cloth available.

Elevate the limb if you can, and apply cold packs to limit swelling and pain.

And, crucial check.

Neurovascular status.

Check the 5P's discol to the injury.

Pain.

Unrelieved by usual measures.

Pulses.

Check pulse below the injury.

Pallor.

Skin color.

Parasthesia.

Numbness or tingling.

And paralysis.

Inability to move.

Keep checking this.

Then transport to the ER.

Okay, once they're at the hospital, what happens next?

Reduction.

Right.

Reduction means putting the bone fragments back into proper alignment.

This can be closed reduction done manually, without surgery, followed by casting or splinting.

Or open reduction, which is surgery.

They surgically expose the fracture, realign the bones, and often use internal fixation pins, plates, rods, screws to hold it together.

That's called ORIF.

Open Reduction Internal Fixation.

After reduction comes retention, right?

Keeping it aligned.

Exactly.

That's where traction or casting comes in.

Immobilization while it heals.

The chapter mentions several types of traction.

Can you briefly cover those?

Sure.

Russell skin traction is sometimes used for femur fractures pre -op.

It uses slings and pulleys.

Balanced suspension can use skin or skeletal traction, pins in the bone, for femur or tibia fractures using counterweights.

Requires meticulous pin care if skeletal.

90 degree 90 degree traction involves a boot cast or sling on the lower leg and a pin in the distal femur, keeping both the hip and knee bent at 90 degrees.

Often used for femur fractures too.

What are the essential nursing interventions for any child in traction?

Maintain the setup.

Weights must hang freely, not on the floor or bed.

Check ropes aren't frayed, knots are tight, ropes are in the pulley grooves.

Neurovascular checks are constant.

Skin integrity is huge watch for breakdown under straps or at pin sites.

And general care.

Monitor for complications of immobility, constipation, breathing issues, skin breakdown elsewhere, kidney stones, muscle wasting.

Provide stimulation, play, ways to cope with being stuck in bed.

Great.

And lastly, casts.

Key nursing points.

Check the cast regularly for hot spots or pressure areas.

Make sure edges are smooth.

We can peddle the edges with waterproof tape, especially important around the perineum on a spica cast.

And the biggest risk.

Circulatory impairment.

That neurovascular check.

Again, the five P's below the cast.

Increased pain, swelling, pale or blue finger stows, knowness, tingling, coolness, inability to move digits, weak pulse report immediately.

What might happen if impairment is found?

The cast might need to be bivalved, cut into two halves or fully removed.

In severe cases, like compartment syndrome, an emergency fasciotomy might be needed to relieve pressure.

Anything else for cast care?

Keep it dry.

Protect it during bathing.

Don't stick anything down inside the cast to scratch risk of skin injury and infection.

Teach isometric exercises for the muscles under the cast to keep them active.

Great overview.

Now the chapter finishes with practice questions, 366 through 375.

We can't go through them all, but they hit key points, right?

Absolutely.

They're excellent for reinforcing the material.

For example, question 366 about Scoliosis brace care highlights that you shouldn't use lotion under the brace.

Question 367 clarifies that isometric exercises are good for JIA during painful times.

Question 368 reviews the immediate steps for an arm fracture, immobilize, checks circulation, etc.

369 covers appropriate arm cast care.

Right.

370 looks at Marfan syndrome management principles.

371 asks about the Ortolani maneuver finding that clunk.

372 points out a potential misunderstanding about clubfoot casting frequency.

373 tests knowledge about Scoliosis brace wear time.

374 is about skeletal traction care, making sure linens aren't on the ropes.

And 375 emphasizes what to do if a child reports tingling toes and a cast reported.

Yeah, working through those rationales really cements the knowledge.

Highly recommend doing that.

So that brings us to the end of this deep dive.

We have covered really the entirety of Chapter 36 from Saunders Comprehensive Review, 7th edition.

We've hit DDH, clubfoot, scoliosis, JIA, Marfan syndrome, leg calf perthos, and fractures, covering descriptions, assessment, interventions, safety.

And even touched on those review questions.

Understanding these conditions is just so fundamental for safe pediatric nursing care.

Couldn't agree more.

So here's a final thought to leave you with.

Think about that common thread running through all these conditions, the critical importance of early detection,

timely intervention, and ongoing careful monitoring.

How do these principles truly shape the long -term physical and even psychosocial outcomes for a developing child facing these musculoskeletal challenges?

That's a great point.

Early action can make such a difference.

Hopefully this deep dive has given you a strong foundation to build on.