A 55-year-old patient with a suspected hip fracture is brought to the emergency department after a motor vehicle accident. Which assessment finding would be MOST indicative of a displaced femoral neck fracture?
1Pain that increases with weight-bearing but decreases with rest
2Bruising and swelling around the hip joint area
3Limited range of motion in the affected hip
4External rotation and shortening of the affected leg✓ 정답
해설
External rotation and shortening of the affected leg is the classic presentation of a displaced femoral neck fracture, making it most indicative. Other options are less specific or common in various hip injuries.
Core Nursing ExplanationKey Concept Analysis: This question assesses the ability to recognize the classic, pathognomonic sign of a specific orthopedic injury—a displaced femoral neck fracture. The key is understanding the biomechanics: when the femoral neck breaks and the fragments are no longer aligned (displaced), the powerful muscles of the thigh (especially the iliopsoas and external rotators) pull the distal fragment, causing a characteristic deformity. This is a critical assessment finding that points directly to a severe, unstable fracture requiring immediate intervention.
Answer Rationale: Key Point! The correct answer is External rotation and shortening of the affected leg. In a displaced femoral neck fracture, the proximal fragment (the femoral head) remains in the acetabulum, but the distal fragment (the shaft) is pulled upward by the thigh muscles (causing shortening) and rotated outward by the external rotators (causing external rotation). This combination is a hallmark sign that is highly specific for this injury. It is often visible upon inspection without even touching the patient.
Distractor Analysis:
Watch out for confusion!
Option 1 (Pain with weight-bearing): This is a common symptom of many hip pathologies, including stable fractures, stress fractures, arthritis, or bursitis. It is not specific to a displaced femoral neck fracture. A patient with a displaced fracture typically cannot bear weight at all due to severe pain and instability.
Option 2 (Bruising and swelling): While soft tissue injury is common after trauma, significant bruising and swelling around the hip joint itself may take hours to develop. More importantly, it is a non-specific sign of trauma and does not confirm the type or severity of the underlying bony injury.
Option 3 (Limited range of motion): This is expected with almost any painful hip injury or condition. It is a sensitive finding (meaning it's usually present) but lacks specificity (meaning it doesn't tell you *what* the injury is). A patient will guard and limit motion due to pain from any fracture, dislocation, or severe soft tissue injury.
Related Concepts: This assessment finding is part of the "look, feel, move" approach in musculoskeletal assessment. "Look" for deformity (shortening, rotation), "Feel" for tenderness and crepitus, and "Move" (or attempt to) for range of motion and stability. Recognizing this deformity triggers urgent actions: maintaining limb alignment, administering analgesia, and preparing for surgical consultation (often for hip hemiarthroplasty or internal fixation).
Concept Summary
The classic triad for a displaced femoral neck fracture: 1) Pain, 2) External Rotation, and 3) Shortening of the affected lower extremity. This is a clinical diagnosis that should be suspected immediately upon inspection.
Side-by-Side Comparison!
Finding
Displaced Femoral Neck Fracture
Hip Dislocation (Posterior)
Intertrochanteric Hip Fracture
Leg Position
Externally rotated, shortened
Internally rotated, adducted, shortened
Externally rotated, often more severely shortened
Key Mechanism
Fall on side, axial load
High-energy trauma (e.g., MVA with knee hitting dashboard)
Fall directly onto greater trochanter
Neurovascular Risk
Low (avascular necrosis is a long-term risk)
High! Sciatic nerve injury common
Lower than neck fracture; good blood supply
Anatomy, Physiology & Pharmacology Points
Anatomy: The femoral neck is a vulnerable area with a relatively poor blood supply. A displaced fracture can disrupt the medial femoral circumflex artery, leading to avascular necrosis (AVN) of the femoral head.
Physiology: The iliopsoas muscle flexes and externally rotates the hip. The gluteal muscles and other short external rotators pull the shaft into external rotation when the proximal fragment is unstable.
Pharmacology: Immediate pain management is crucial. Opioids (e.g., morphine) are typically required. Pre-operative antibiotics (e.g., cefazolin) are administered to prevent surgical site infection.
Memory TipsMnemonic: "SER" for Femoral Neck Fracture
Shortening
External Rotation
Visualize: The leg looks like it's "rolling out" and "pulling up."
High-Frequency NCLEX Topics
Musculoskeletal trauma, especially hip fractures in older adults, is a high-yield topic. The NCLEX loves to test on:
Post-operative care for hip surgery (e.g., hip precautions, use of abductor pillow, preventing dislocation).
Watch Out for Question Variations!
The same concept can be tested in different ways:
Priority Action: "The nurse observes external rotation and shortening of a trauma patient's leg. What is the nurse's priority action?" (Answer: Immobilize the limb and notify the provider/Rapid Response Team).
Post-Op Care: "A patient is 1-day post-op for a right hip hemiarthroplasty. Which finding requires immediate intervention?" (Answer: The right leg is internally rotated and adducted—signs of posterior dislocation).
Patient Teaching: "Which instruction is most important for a patient with a new hip fracture to prevent displacement?" (Answer: Do not bear weight on the affected leg).
Nursing Clinical Practice GuideClinical Scenario: Mr. Johnson, a 78-year-old with osteoporosis, is admitted via EMS after a fall at home. He is lying on the stretcher, his left leg is noticeably turned outward and appears shorter than the right. He reports severe left hip pain and cannot move the leg.
Conduct a primary survey. Once stable, focus on the injury.
Inspect: Confirm the classic deformity (shortening, external rotation). Do NOT attempt to "straighten" the leg.
Neurovascular Checks (Q1H initially): This is critical! Assess the "5 P's" distal to the injury: Pain, Pallor, Pulselessness, Paresthesia, Paralysis. Compare to the unaffected side.
Pain Management: Administer IV opioids as ordered. Pain is severe and immobilization helps.
Pre-Operative Care:
Immobilize: Use pillows or a splint to support the limb in its position of comfort to minimize further tissue damage and pain.
Prepare for Diagnostics: Anticipate orders for X-rays and possibly a CT scan.
Skin Integrity: Use a pressure-relieving mattress. Log-roll the patient for care to avoid twisting the hip.
Patient Safety and Precautions:
Contraindication: Never attempt range of motion exercises or have the patient bear weight on a suspected hip fracture. This can displace the fracture further, cause severe pain, and damage blood vessels/nerves.
Medication Caution: Older adults are sensitive to opioids. Monitor closely for respiratory depression and oversedation. Use the lowest effective dose.
Key Monitoring: Frequent neurovascular checks are non-negotiable. A change in pulses, sensation, or movement could indicate compartment syndrome or vascular injury.
Pain: Ask about pain level (use a 0-10 scale). Is it disproportionate or increasing?
Pulse: Palpate the dorsalis pedis and posterior tibial pulses. Use a Doppler if not palpable.
Perfusion: Check capillary refill (< 3 seconds is normal). Observe for pallor or cyanosis.
Sensation: Lightly touch different areas of the foot/toes. Ask "Can you feel this? Does it feel the same as the other side?"
Movement: Ask the patient to "wiggle your toes." Do NOT ask them to move the ankle or knee.
Document all findings clearly and compare bilaterally.
Medication: IV Morphine Administration
Action: Opioid agonist for severe pain.
Precautions: Administer slowly over 4-5 minutes. Have naloxone and monitoring equipment (pulse oximeter) readily available.
Monitoring: Assess pain level 15-30 minutes after administration. Monitor respiratory rate, oxygen saturation, and level of consciousness continuously.
A Word from Your Senior Nurse
"Nursing is not just about carrying out physician orders — it's about being the frontline guardian for your patients! In clinical practice, recognizing subtle changes in a patient's vital signs early can prevent deterioration. When you see that classic 'outward turned and short leg,' you're not just seeing a sign—you're recognizing a patient in severe pain who is at high risk for complications like avascular necrosis or DVT. Your sharp assessment triggers the entire cascade of appropriate care. When studying for your boards, don't just memorize 'external rotation' — visualize the patient, understand why the muscles pull the leg that way, and connect it to the urgent nursing actions required. That mindset will not only earn you a great score on the NCLEX but will make you a truly confident, professional nurse!"
Femoral Neck Fracture — A break in the narrow section of the femur just below the femoral head. It is a common injury in older adults, often due to osteoporosis, and carries a risk of avascular necrosis.
External Rotation — A positional deformity where the foot and leg are turned outward. In a displaced femoral neck fracture, this is caused by the unopposed pull of the external rotator muscles of the hip.
Shortening — A limb length discrepancy where the injured leg appears shorter than the contralateral leg. In hip fractures, it results from proximal migration of the femoral shaft due to muscle contraction.
Neurovascular Assessment — A systematic evaluation of nerve function and blood circulation distal to an injury or surgical site, often summarized by the "5 P's": Pain, Pulse, Pallor, Paresthesia, Paralysis.
Hemiarthroplasty — A surgical procedure for a displaced femoral neck fracture where the damaged femoral head is replaced with a metal prosthesis, while the natural acetabulum is preserved.