Ch. 38 - Bone & Joint Health

Pathophysiology Exam 3

What are the key factors that maintain healthy bones?

Adequate calcium intake

Adequate vitamin D

Regular weight-bearing exercise

Balanced nutrition

Normal hormone levels

Avoiding smoking and excessive alcohol

Why is calcium important?

Calcium is the primary mineral that provides bone strength and hardness

Why is vitamin D essential?

It helps the intestines absorb calcium and phosphorus, which are necessary for bone mineralization

What type fof exercise best promotes bone health?

Weight-bearing exercises, such Asas walking, jogging, dancing, and strength training

Why does weight-bearing exercise strengthen bones?

Mechanical stress stimulates osteoblasts to build new bone

Which lifestyle habits increase the risk of weak bones?

Smoking

Excessive alcohol intake

Physical inactivity

Poor nutrition

What structures help keep joints healthy?

Healthy cartilage

Synovial fluid

Strong muscles

Ligaments

Tendons

What is the function of cartilage?

It cushions the ends of bones and reduces friction during movement

What is the function of synovial fluid?

It lubricates joints and nourishes articular cartilage

Why are strong muscles important for joint health?

They stabilize joints and reduce stress on bones and ligaments

How does obesity affect joints?

It increases stress on weight-bearing joints, especially the knees and hips

Which jointa are most commonly affected by wear and tear?

Knees

Hips

Spine

How can osteoporosis be prevented?

Adequate calcium

Vitamin D

Weight-bearing exercise

Smoking cessation

Limiting alcohol

Fall prevention

Why is fall prevention especially important in older adults?

Falls are a leading cause of fractures, especially in people with osteoporosis

Name three fall-prevention strategies?

Remove loose rugs and tripping hazards

Ensure adequate lighting

Use assistive devices if needed

What is osteoporosis?

A disease characterized by decreased bone density and deterioration of bone structure, making bones fragile and more likely to fracture

Why do bones fracture more easily in osteoporosis?

Bone resorption exceeds bone formation, weakening the skeleton

Which cells are overactive in osteoporosis?

Osteoclasts (bone-resorbing cells)

Which bones are most commonly fractured in osteoporosis?

Hip

Vertebrae

Wrist

Who is at greatest risk for osteoporosis?

Older adults

Postmenopausal women

People with low body weight

Smokers

Long-term corticosteroid users

Individuals with family history

Why are postmenopausal women at increased risk?

Estrogen levels decrease, leading to increased bone resorption

How do corticosteroids contribute to osteoporosis?

They decrease bone formation and increase bone breakdown over time

Why is osteoporosis called the “silent disease”?

It often causes no symptoms until a fracture occurs

What symptoms may appear as osteoporosis progresses?

Loss of height

Kyphosis (stooped posture)

Back pain

Fragility fractures

What is a fragility fracture?

A fracture caused by minimal trauma, such as fall from standing height

Why do vertebral fractures cause off of height?

The weakened vertebrae compress and collapse

What is the gold standard test for diagnosing osteoporosis?

A DEXA (dual-energy X-ray absorptiometry) scan

What does a DEXA scan measure?

Bone mineral density (BMD)

Why are X-rays not the best screening test for osteoporosis?

Bone loss must be significant before it is visible on a standard X-ray

What lifestyle changes help treat osteoporosis?

Weight-bearing exercise

Adequate calcium

Vitamin D

Smoking cessation

Limiting alcohol

Fall prevention

Which medications are commonly prescribed for osteoporosis?

Bisphosphonates (first-line in many patients)

Other medications may be used based on individual risk and provider recommendations

How do bisphosphonates work?

They inhibit osteoclasts, slowing bone resorption and helping preserve bone density

What patient teaching is important when taking oral bisphosphonates?

Take with a full glass of water

Take on an empty stomach

Remain upright for at least 30 minutes after taking the medication

Follow the specific instructions for the prescribed medication

Why should patients remain upright after taking oral bisphosphonates?

To reduce the risk of esophageal irritation

What is the nurse’s primary goal in caring for a patient with osteoporosis?

Prevent fractures

What teaching should the nurse provide regarding home safety?

Remove tripping hazards

Install grab bars if needed

Wear supportive footwear

Improve lighting

Use assistive devices when appropriate

What is the most common complication of osteoporosis?

Fractures

What diagnostic test is most likely to appear on an exam question about osteoporosis?

DEXA scan

What medication class is most commonly associated with osteoporosis treatment?

Bisphosphonates

What is the single most important nursing goal for osteoporosis?

Prevent falls and fractures

What is degenerative disc disease (DDD)?

A condition in which the intervertebral discs gradually lose water, elasticity, and height, leading to pain and decreased spinal function

What are intervertebral discs?

Fibrocartilaginous cushions located between the vertebrae that act as shock absorbers and allow flexibility of the spine

Which parts of the spine are most commonly affected by DDD?

Servical spine (neck)

Lumbar spine (lower back)

Why does degenerative disc disease develop?

Aging and repeated stress cause discs to lose water content, making them thinner and less able t absorb shock

What are common risk factors for degenerative disc disease?

Aging

Repetitive lifting

Obesity

Smoking

Previous spinal injury

Genetics

Why does smoking increase the risk of DDD?

Smoking reduces blood flow and nutrient delivery to spinal discs, accelerating degeneration

What happens to spinal discs in DDD?

Lose water content

Become thinner

Lose elasticity

Provide less cushioning between vertebrae

How can DDD lead to nerve compression?

Disc degeneration and loss of height can contribute to disc bulging to narrowing of spaces where spinal nerves travel, leading to nerve irritation or compression

Why does DDD cause pain?

Degenerated discs provide less cushioning, increasing stress on the vertebrae and surrounding joints, ligaments, and nerves

What are the most common symptoms of DDD?

Chronic neck or low back pain

Stiffness

Pain that worsens with sitting, bending, or lifting

Pain that improves with changing positions or gentle movement in some people

When does DDD pain often worsen?

Prolonged sitting

Bending

Twisting

Lifting heavy objects

What symptoms may occur if spinal nerves are compressed?

Numbness

Tingling

Weakness

Pain radiating into the arms or legs (radicular pain)

What is sciatica?

Pain that radiates down the leg due to irritation or compression of the sciatic nerve or its nerve roots, often associated with lumbar spine disordersH

ow is degenerative disc disease diagnosed?

Medical history

Physical examination

Imaging studies

Which imaging study best evaluates intervertebral discs?

MRI

Why might X-rays still be ordered?

They can show disc space narrowing, spinal alignment, and bony changes, but they no not visualize discs as well as MRI

What is the initial treatment for most patients with DDD?

Activity modification

Physical therapy

Regular exercise as tolerated

Pain management

Which medications may be used for symptom relief?

NSAIDs (if appropriate)

Acetaminophen

Other medications may be prescribed depending on symptoms and patient factors

Why Is physical therapy important?

It strengthens the core and back muscles, improves flexibility, and supports the spine

When might surgery be considered?

If conservative treatment fails or there is significant nerve compression, progressive neurological deficits, or severe functional impairment

What lifestyle changes help manage DDD?

Maintain a healthy weight

Exercise properly

Use proper body mechanics

Avoid smoking

Stay physically active within recommended limits

Why is maintaining a healthy weight important?

It reduces stress on the spine and may help decrease symptoms

What body mechanics should patients use?

Bend at the knees and hips, not the waist

Keep objects close to the body when lifting

Avoid twisting while lifting

What is the hallmark of degenerative disc disease?

Progressive degeneration of the intervertebral discs leading to chronic neck or back pain

Which imaging test is most useful for evaluating DDD?

MRI

What is the first-line treatment for most patients with DDD?

Conservative management, including physical therapy, exercise, activity modification, and pain control

What symptom suggests nerve involvement in DDD?

Pain, numbness, tingling, or weakness radiating into an arm or leg