Ten free musculoskeletal (MSK) NCLEX practice questions with full rationales — compartment syndrome, fat embolism, cast and traction care, total hip and knee precautions, osteoporosis and bisphosphonates, RA vs OA, and amputation. Answer each one, then reveal the correct answer and see why every option is right or wrong. No sign-up needed to practice here.
High-Yield Musculoskeletal Review
Musculoskeletal nursing on the NCLEX rewards a sharp eye for orthopedic emergencies. Compartment syndrome is the one that separates safe nurses from the rest: rising pressure inside a fascial compartment chokes off perfusion, and the earliest, most reliable clue is PAIN out of proportion to the injury, worsened by passive stretch and unrelieved by opioids. The classic "6 P's" (Pain, Paresthesia, Pallor, Pulselessness, Paralysis, Poikilothermia) progress from early to late—pulselessness and paralysis are ominous late findings. Act fast: notify the surgeon, loosen or bivalve a constrictive cast/dressing, and keep the limb at HEART LEVEL. Do not elevate above the heart and do not apply ice, because both lower arterial inflow and worsen ischemia. Definitive treatment is emergency fasciotomy. Fat embolism syndrome typically appears 24–72 hours after a long-bone or pelvic fracture, producing a triad of hypoxia/respiratory distress, neurologic changes (confusion, restlessness), and a petechial rash over the chest, axillae, and conjunctivae; management is supportive oxygenation and stabilizing the fracture.
Casts and traction demand consistent neurovascular ("CMS"/5 P's) monitoring. Elevate a new cast early to control swelling, never poke objects underneath it, and report increasing pain, numbness, coolness, or a warm "hot spot"/foul odor signaling infection. With skeletal traction, maintain the line of pull, keep weights hanging freely off the floor, never lift or remove them, keep the body aligned, and provide pin-site care. After a posterior-approach total hip arthroplasty, drill dislocation precautions: no hip flexion beyond 90 degrees, no crossing/adducting the legs, and no internal rotation; use an abduction pillow and a raised toilet seat. Sudden severe pain, a "pop," and a shortened, internally or externally rotated leg signal dislocation. Total knee arthroplasty care centers on early PT/mobilization, continuous passive motion where ordered, and DVT prophylaxis.
Chronic conditions round out the blueprint. Osteoporosis care means calcium plus vitamin D, weight-bearing exercise, fall prevention, and correct bisphosphonate technique—take it in the morning with a full glass of plain water on an empty stomach and stay upright 30–60 minutes to prevent esophagitis. Distinguish RA (autoimmune, symmetric, systemic, morning stiffness lasting over an hour) from OA (degenerative wear-and-tear, asymmetric, weight-bearing joints, brief stiffness under 30 minutes, Heberden/Bouchard nodes). Finally, respect phantom limb pain after amputation as real and treatable, and position the residual limb to prevent flexion contractures.
Musculoskeletal (MSK) NCLEX Practice Questions
Question 1 · Compartment Syndrome
A client is admitted with a closed tibial fracture and a newly applied plaster cast. Six hours later the client reports severe, deep, throbbing leg pain. Which finding should the nurse recognize as the EARLIEST and most reliable indicator of acute compartment syndrome?
- A Pain on passive stretch of the toes that opioids do not relieve
- B Complete inability to wiggle or move the toes on the affected foot
- C Cool, pale, mottled skin on the toes and foot of the affected leg
- D An absent dorsalis pedis pulse in the affected foot
Show answer & rationale
Correct answer: A
The correct choice is pain that worsens with passive stretch and is unrelieved by opioids. This is the hallmark EARLY sign of compartment syndrome—rising intracompartmental pressure compresses nerves and tissue, producing pain that is classically "out of proportion" to the injury and disproportionate to the analgesia given. Recognizing it early allows the nurse to notify the surgeon and relieve the constriction before permanent damage occurs. The absent dorsalis pedis pulse describes pulselessness, which is a LATE sign; by the time the pulse disappears, arterial flow is already severely compromised and irreversible ischemia may be developing. Complete inability to move the toes represents paralysis, also a LATE and ominous finding indicating advanced nerve/muscle injury. Cool, pale, mottled skin on the toes and foot reflects pallor and poikilothermia—later perfusion changes, not the first warning. Waiting for pulselessness or paralysis before acting risks limb loss. Clinical pearl: remember the 6 P's in order of appearance—Pain first, then Paresthesia, Pallor, then the late trio of Pulselessness, Paralysis, and Poikilothermia. "Pain that opioids won't touch" is your NCLEX trigger phrase to escalate immediately. Current orthopedic standard is to keep the limb at heart level, remove constrictive dressings, notify the provider, and prepare for possible fasciotomy—never to elevate above the heart or apply ice.
Question 2 · Compartment Syndrome
A nurse suspects acute compartment syndrome in a client whose forearm cast feels increasingly tight and painful. After notifying the surgeon and loosening the cast, which intervention is MOST appropriate?
- A Elevate the arm above heart level and apply ice packs to the forearm
- B Wrap the forearm in a snug elastic bandage to limit further swelling
- C Vigorously massage the forearm toward the heart to restore circulation
- D Keep the arm at heart level and prepare for a possible fasciotomy
Show answer & rationale
Correct answer: D
The correct action is to keep the arm at heart level and prepare for a possible fasciotomy. In compartment syndrome, the goal is to maximize arterial perfusion into an already ischemic limb. Positioning the extremity at heart level (not above) preserves inflow while avoiding further congestion, and fasciotomy is the definitive treatment to release the pressure. Elevating above the heart and applying ice is exactly what NOT to do: elevation reduces arterial inflow and ice causes vasoconstriction, both worsening ischemia. This is a very common NCLEX distractor because elevation and ice are correct for ordinary swelling—but compartment syndrome flips that rule. Vigorously massaging the forearm does nothing to relieve intracompartmental pressure and can increase tissue damage. Applying a snug elastic bandage adds external constriction to a compartment that is already dangerously pressurized, further compromising perfusion. Clinical pearl: for routine post-injury swelling, think RICE (Rest, Ice, Compression, Elevation); for suspected compartment syndrome, think the opposite—loosen constriction, keep the limb at heart level, no ice, no elevation, and get the surgeon. Fasciotomy performed early (ideally within about 6 hours of onset) offers the best chance to preserve muscle and nerve function, which is why prompt recognition and correct positioning are lifesaving.
Question 3 · Fat Embolism Syndrome
A 20-year-old client is hospitalized with a closed femur fracture. Approximately 36 hours after admission, the client becomes restless and confused, develops dyspnea with an oxygen saturation of 88%, and the nurse notes scattered petechiae across the chest and axillae. Which complication should the nurse suspect?
- A Deep vein thrombosis
- B Fat embolism syndrome
- C Osteomyelitis
- D Acute compartment syndrome
Show answer & rationale
Correct answer: B
The correct answer is fat embolism syndrome (FES). FES classically develops 24–72 hours after a long-bone or pelvic fracture, when fat globules from the marrow enter the circulation and lodge in the lungs and brain. The presentation in this scenario is the textbook triad: respiratory distress with hypoxia, neurologic changes (restlessness, confusion), and a petechial rash over the chest, axillae, neck, and conjunctivae. A young client with a femur fracture is a high-risk profile. Deep vein thrombosis would cause unilateral calf pain, swelling, and warmth; it does not produce a petechial rash or confusion, and if it embolized to the lung it still would not explain petechiae. Compartment syndrome is a localized limb emergency—severe unrelieved pain, tightness, and neurovascular changes in the affected extremity—not a systemic picture with petechiae and altered mentation. Osteomyelitis is a bone infection that develops over days to weeks with localized pain, warmth, fever, and drainage, not an acute respiratory-neurologic crisis within 36 hours. Clinical pearl: the petechial rash is the most specific clue that distinguishes FES from a pulmonary embolus. Management is supportive—high-flow oxygen (and sometimes mechanical ventilation), fluid balance, and early surgical stabilization of the fracture, which also helps prevent FES from occurring.
Question 4 · Skeletal Traction
A client is placed in skeletal traction for a femoral fracture. Which nursing action correctly maintains the traction?
- A Remove the weights briefly each time the client is repositioned
- B Lift the weights by hand for a few minutes to relieve the client's discomfort
- C Ensure the weights hang freely and do not rest on the floor
- D Tie the traction ropes to the bed frame to keep them from slipping
Show answer & rationale
Correct answer: C
The correct action is to ensure the weights hang freely and do not touch the floor. Traction only works when a continuous, unbroken pull is maintained along the line of the injury; weights resting on the floor (or on the bed) release the pull and defeat the therapy, allowing muscle spasm and misalignment. Removing the weights during repositioning is contraindicated in skeletal traction—the pull must never be interrupted unless a prescriber orders it, because sudden release causes severe pain and can displace the fracture. Lifting the weights by hand, even briefly, likewise interrupts the therapeutic force and can jerk the fracture out of alignment. Tying the ropes to the bed frame stops the weights from moving freely, which again eliminates the continuous pull; ropes should move unobstructed over their pulleys, and knots should be kept away from the pulleys. Clinical pearl: for traction, remember "never lift, never remove, keep it hanging free." The nurse also maintains proper body alignment and counter-traction (often the client's own body weight), keeps the client from sliding down to the foot of the bed, and provides pin-site care per protocol to prevent infection. If the client complains of severe pain, assess alignment and neurovascular status rather than adjusting the weights independently.
Question 5 · Total Hip Arthroplasty
On postoperative day 2 following a total hip arthroplasty, a client suddenly reports severe pain in the operative hip. Which additional finding would MOST strongly indicate a hip dislocation requiring the nurse to notify the surgeon?
- A A small amount of serosanguineous drainage on the surgical dressing
- B Reddish-purple ecchymosis (bruising) around the surgical incision
- C Incisional pain rated 3/10 that is relieved by the prescribed analgesic
- D A "popping" sensation with a shortened, internally rotated leg
Show answer & rationale
Correct answer: D
The correct finding is the reported "popping" sensation with a shortened, internally rotated leg. These are classic signs that the prosthetic femoral head has dislocated from the acetabular component. Sudden severe pain, a palpable or audible "pop," leg-length shortening, and abnormal rotation (internal or external) of the affected extremity all point to dislocation—an urgent complication requiring the surgeon to be notified for reduction. A small amount of serosanguineous drainage on the dressing is expected in the early postoperative period and does not signal dislocation. Incisional pain of 3/10 that responds to analgesia is normal, controlled surgical pain—the presence of relief with medication argues against an acute mechanical complication. Reddish-purple ecchymosis (bruising) around the incision is normal, expected surgical bruising on postoperative day 2, not an emergency. Clinical pearl: memorize the dislocation picture as "shortened, rotated, and severe sudden pain, often with a pop." To PREVENT dislocation after a posterior approach, the nurse enforces the surgeon’s precautions—no hip flexion beyond 90 degrees, no crossing or adducting the legs, and no internal rotation—using an abduction pillow, a raised toilet seat, and a high chair with armrests. If dislocation is suspected, keep the client still, maintain alignment, and notify the surgeon immediately rather than attempting to reposition the limb.
Question 6 · RA vs OA
A nurse is assessing a client with joint complaints. Which finding is MOST consistent with rheumatoid arthritis rather than osteoarthritis?
- A Symmetric joint pain with morning stiffness over an hour and fatigue
- B Asymmetric involvement of weight-bearing joints such as the hips and knees
- C Hard Heberden nodes at the distal interphalangeal joints of the fingers
- D Brief stiffness under 30 minutes with joint pain that eases with rest
Show answer & rationale
Correct answer: A
The correct answer is symmetric joint pain with morning stiffness lasting over an hour and fatigue. Rheumatoid arthritis (RA) is an autoimmune, systemic inflammatory disease: it attacks joints symmetrically (both hands, both wrists), produces prolonged morning stiffness (typically over an hour), and causes systemic features like fatigue, low-grade fever, and weight loss. Brief stiffness (under 30 minutes, typically after rest or inactivity) with pain that worsens with use and eases with rest describes osteoarthritis (OA), a degenerative “wear-and-tear” condition. Asymmetric involvement of weight-bearing joints (hips, knees) is characteristic of OA, which typically loads the joints that bear the most mechanical stress and does so unevenly. Heberden nodes at the distal interphalangeal joints are bony enlargements typical of OA (Bouchard nodes appear at the proximal interphalangeal joints); RA more often affects the metacarpophalangeal and proximal interphalangeal joints with soft, warm swelling. Clinical pearl: think "RA = Rheumatoid = Rise-and-stiff Rocks over an hour, symmetric, systemic autoimmune," versus "OA = Older, One-sided, wear-and-tear, brief stiffness, nodes." RA also shows elevated inflammatory markers (ESR, CRP) and positive rheumatoid factor/anti-CCP, and is managed with DMARDs to slow disease progression, whereas OA management centers on analgesia, weight management, and activity modification.
Question 7 · Amputation
Two days after a below-the-knee amputation, a client reports a burning, cramping pain in the foot that is no longer there. Which is the nurse's BEST response?
- A Keep the residual limb elevated on a pillow continuously to reduce the sensation
- B "That feeling isn't real; it will go away on its own very soon."
- C Acknowledge that phantom limb pain is real and administer the prescribed analgesic
- D Position the client in high Fowler with the hips flexed for comfort
Show answer & rationale
Correct answer: C
The correct response is to acknowledge that phantom limb pain is real and administer the prescribed analgesic. Phantom limb pain—burning, cramping, or tingling perceived in the absent limb—is a genuine neurologic phenomenon caused by altered nerve signaling, not an imagined or psychological complaint. Validating the client and treating the pain (often with analgesics and adjuncts such as gabapentin, calcitonin, TENS, or mirror therapy) is the therapeutic, evidence-based approach. Telling the client the feeling "isn't real" is dismissive, factually wrong, and damages the therapeutic relationship; the sensation is very real to the client and deserves treatment. Keeping the residual limb elevated on a pillow continuously is contraindicated—prolonged elevation on a pillow promotes a flexion contracture of the hip or knee, which impairs future prosthetic fitting. Elevation of the residual limb is generally limited to the first 24 hours to control edema, after which the limb is kept flat and the client is encouraged to lie prone periodically to extend the joint. Positioning in high Fowler with hips flexed also encourages hip flexion contractures and does not address the pain. Clinical pearl: to prevent contractures after a lower-limb amputation, avoid prolonged flexion—no long-term pillow under the stump, no continuous sitting, and encourage prone positioning. Treat phantom pain aggressively; unmanaged early pain increases the risk of chronic phantom pain.
Question 8 · Cast Care
A nurse is teaching a client who was discharged with a new fiberglass forearm cast. Which instructions should the nurse include? Select all that apply.
- A Use a coat hanger or pencil to scratch inside the cast if the skin itches
- B Elevate the casted arm on pillows for the first 24 to 48 hours to reduce swelling
- C Check the color, warmth, movement, and sensation of the exposed fingers regularly
- D Apply ice packs directly inside the cast to reduce swelling
- E Report increasing pain, numbness, a foul odor, or a warm "hot spot" on the cast
- F Move the fingers frequently to promote circulation
Show answer & rationale
Correct answer: B, C, E, F
The correct instructions are to elevate the arm early, report warning signs, perform neurovascular checks of the fingers, and move the fingers frequently. Elevating a new cast on pillows for the first 24–48 hours uses gravity to limit dependent edema, which is the leading cause of a cast becoming too tight. Reporting increasing pain, numbness, a foul odor, or a warm "hot spot" is essential because these signal serious problems—pain and numbness suggest neurovascular compromise or compartment syndrome, while a foul odor or localized heat suggests infection or skin breakdown under the cast. Checking color, warmth, movement, and sensation (the CMS/neurovascular assessment) of the exposed fingers detects circulatory compromise early. Moving the fingers frequently promotes venous return and reduces swelling and stiffness. Two instructions are incorrect and dangerous. Using a coat hanger or pencil to scratch inside the cast can tear the skin and introduce bacteria, leading to infection that goes unseen beneath the cast—clients should never insert objects; cool air (e.g., a hair dryer on the cool setting) relieves itching instead. Applying ice packs directly inside the cast is wrong: moisture inside a cast macerates skin and promotes breakdown, and ice belongs outside the cast in a sealed bag if used at all. Clinical pearl: teach "elevate, wiggle, watch, and never poke"—and any increasing pain unrelieved by elevation and analgesia warrants an immediate provider call to rule out compartment syndrome.
Question 9 · Total Hip Arthroplasty
A nurse is reinforcing dislocation precautions with a client who underwent a posterior-approach total hip arthroplasty. Which instructions should the nurse include? Select all that apply.
- A Avoid turning the toes and knee of the operative leg inward
- B Use a raised toilet seat
- C Sit in low, soft chairs whenever possible
- D Do not bend the operative hip more than 90 degrees
- E Place an abduction pillow between the legs while lying in bed
- F Keep the legs crossed at the ankles while sitting
Show answer & rationale
Correct answer: A, B, D, E
The correct instructions are: no hip flexion beyond 90 degrees, use an abduction pillow, avoid internal rotation, and use a raised toilet seat. These enforce the three cardinal rules after hip arthroplasty—no excessive flexion, no adduction, and no internal rotation—which together keep the prosthetic femoral head seated in the acetabulum. Limiting flexion to 90 degrees prevents the position that most commonly pops the joint out. An abduction pillow keeps the legs apart, preventing the operative leg from crossing midline (adduction). Avoiding turning the toes and knee inward prevents internal rotation, another dislocating motion. A raised toilet seat prevents the deep hip flexion that a standard-height toilet forces. Two instructions are incorrect. Crossing the legs at the ankles causes adduction across the body's midline, a classic dislocation trigger—clients should keep the legs apart, not crossed. Sitting in low, soft chairs is unsafe because sinking into a low seat flexes the hip well past 90 degrees; clients should use firm, elevated chairs with armrests to keep the hip above the knees. Clinical pearl: teach "knees apart, don't cross, don't bend past 90, don't turn the toes in." These precautions are typically maintained for about 6 to 12 weeks or as the surgeon directs. Sudden severe pain with a shortened, rotated leg or a "pop" signals dislocation and requires immediate provider notification.
Question 10 · Osteoporosis
A nurse is teaching a postmenopausal client newly prescribed oral alendronate (a bisphosphonate) for osteoporosis. Which instructions should the nurse include? Select all that apply.
- A Lie down for 30 minutes after the dose to improve absorption
- B Increase dietary intake of calcium and vitamin D
- C Take the bisphosphonate first thing in the morning with a full glass of plain water
- D Perform regular weight-bearing exercise such as walking
- E Take the medication with breakfast to prevent nausea
- F Remain upright, sitting or standing, for at least 30 minutes after taking the dose
Show answer & rationale
Correct answer: B, C, D, F
The correct instructions are to take the bisphosphonate in the morning with a full glass of plain water, remain upright for at least 30 minutes, perform weight-bearing exercise, and increase calcium and vitamin D. Oral bisphosphonates are highly irritating to the esophagus, so they must be taken on an empty stomach first thing in the morning with a full glass of plain water (not coffee, juice, or mineral water, which reduce absorption). Remaining upright for 30–60 minutes uses gravity to keep the pill moving into the stomach, preventing reflux-induced esophagitis or esophageal ulceration. Weight-bearing exercise such as walking stimulates osteoblastic bone formation and helps preserve bone density. Adequate calcium and vitamin D provide the substrate and absorption needed for bone health and are foundational to osteoporosis therapy. Two instructions are wrong and unsafe. Lying down after the dose is directly contraindicated because a reclined position lets the caustic drug sit against the esophageal mucosa, dramatically increasing the risk of erosive esophagitis—the opposite of what "stay upright" prevents. Taking the medication with breakfast blocks absorption; food, especially calcium-containing food, chelates the drug and renders it ineffective, so it must be taken well before eating (commonly at least 30 minutes before the first food, drink, or other medication). Clinical pearl: for bisphosphonates remember "morning, empty stomach, plain water, stay up, wait to eat." Also reinforce fall-prevention strategies, since preventing fractures is the ultimate goal of osteoporosis care.
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Musculoskeletal NCLEX FAQ
What is the earliest sign of compartment syndrome, and why does it matter on the NCLEX?
The earliest and most reliable sign is severe pain out of proportion to the injury that worsens with passive stretch and is not relieved by opioids. On the NCLEX, this phrase is your trigger to escalate immediately—notify the surgeon, loosen any constrictive cast or dressing, and keep the limb at heart level. Later signs (pulselessness, paralysis) mean irreversible damage may already be occurring, so you never wait for them.
Why shouldn't I elevate the limb or apply ice in compartment syndrome when those help other swelling?
Elevation above the heart reduces arterial inflow, and ice causes vasoconstriction—both lower perfusion to a limb that is already ischemic. For ordinary post-injury swelling, RICE (rest, ice, compression, elevation) is correct, but suspected compartment syndrome flips the rule: keep the limb at heart level, remove constriction, no ice, no elevation, and prepare for a possible fasciotomy.
How do I tell rheumatoid arthritis apart from osteoarthritis?
RA is autoimmune and systemic: symmetric joints, morning stiffness lasting more than an hour, and whole-body symptoms like fatigue and low-grade fever. OA is degenerative wear-and-tear: asymmetric, affects weight-bearing joints, stiffness after rest lasts under 30 minutes and eases with movement while pain worsens with use, and produces Heberden (distal) and Bouchard (proximal) nodes. Memory aid: RA rises stiff for over an hour and is symmetric; OA is older, one-sided, and brief.
What are the key teaching points for oral bisphosphonates in osteoporosis?
Take the dose first thing in the morning on an empty stomach with a full glass of plain water, then remain upright (sitting or standing) for at least 30 to 60 minutes and wait before eating or taking other medications. This prevents esophagitis and ensures absorption. Pair the medication with adequate calcium and vitamin D, weight-bearing exercise, and fall-prevention strategies. Never lie down right after the dose or take it with food.