A nurse is assessing a 58-year-old client who reports severe… | 마이메르시 MyMerci
Adult Health
문제

A nurse is assessing a 58-year-old client who reports severe lower back pain radiating down the left leg. Which assessment finding would be most indicative of lumbar disc herniation?

The client describes the pain as sharp and burning, worsening when sitting or coughing, and reports numbness in the left foot.
해설
The straight leg raise test is a specific diagnostic maneuver used to assess for lumbar disc herniation, particularly affecting the sciatic nerve.

심화 해설

Core Nursing Explanation Key Concept Analysis: This question assesses your ability to identify a key physical assessment finding for Lumbar disc herniation. The pathophysiology involves the protrusion of the intervertebral disc's nucleus pulposus, which compresses the spinal nerve roots, most commonly the Sciatic nerve. This compression causes the classic symptoms of radicular pain (radiating down the leg), paresthesia (numbness), and sometimes motor weakness.

Answer Rationale: The Straight Leg Raise (SLR) test is a primary physical exam maneuver for suspected lumbar disc herniation. Key Point! A positive test is defined as reproduction of the patient's radicular pain (pain radiating below the knee) when the leg is raised between 30 and 70 degrees. This occurs because the maneuver stretches the sciatic nerve, which is already irritated and compressed by the herniated disc material. The patient's description of pain worsening with sitting or coughing (which increases intraspinal pressure) further supports this diagnosis.

Distractor Analysis:
• Watch out for confusion! Option ①: Positive Babinski reflex and hyperactive reflexes are upper motor neuron signs, typically associated with conditions like spinal cord injury or stroke, not a simple nerve root compression from a herniated disc.
• Option ②: Muscle rigidity and fever with an elevated WBC suggest an infectious or inflammatory process like Meningitis or an epidural abscess, not a mechanical disc problem.
• Option ④: Decreased cervical range of motion points to a problem in the Cervical spine (neck), which is anatomically distant from the lumbar region described in the scenario.

Related Concepts: Understanding radicular vs. referred pain is crucial. Radicular pain follows a specific dermatome (skin area supplied by a nerve root), like sciatica down the leg. Nursing care focuses on pain management, proper body mechanics education, and monitoring for worsening neurological deficits (like foot drop or loss of bowel/bladder control—cauda equina syndrome, a surgical emergency). Concept Summary • Pathophysiology: Herniated nucleus pulposus → compresses nerve root (often L4-L5, L5-S1) → sciatic nerve irritation.
• Key Symptoms: Lower back pain radiating to buttock/leg (sciatica), numbness/tingling, pain aggravated by Valsalva maneuver (coughing, sneezing).
• Key Assessment: Straight Leg Raise (SLR) test, neurological exam (sensation, strength, reflexes).
• Nursing Priorities: Pain assessment, education on body mechanics/log-rolling, monitoring for red flags (loss of bowel/bladder function).
Side-by-Side Comparison!
Assessment/TestIndicatesTypical Finding in Lumbar Disc Herniation
Straight Leg Raise (SLR) TestSciatic nerve root irritation (L4-S1)Positive: Radiating pain below knee at 30-70° leg elevation
Babinski ReflexUpper Motor Neuron (UMN) lesionPositive (toes fan upward) – NOT expected in simple disc herniation
Kernig's Sign (pain on knee extension with hip flexed)Meningeal irritation (e.g., Meningitis)Negative – Associated with infection/inflammation, not mechanical compression
Anatomy, Physiology & Pharmacology Points • Anatomy: The sciatic nerve is formed from nerve roots L4 through S3. Herniation at L4-L5 affects the L5 nerve root; herniation at L5-S1 affects the S1 nerve root.
• Pharmacology: First-line medications include NSAIDs (e.g., Ibuprofen) for inflammation and neuropathic pain agents (e.g., Gabapentin) for radicular symptoms. Muscle relaxants (e.g., Cyclobenzaprine) may be used for associated muscle spasms.
Memory Tips • SLR Test: Think "Straight Leg = Sciatica Likely".
• Red Flags (Cauda Equina Syndrome): Remember "Bowel/Bladder/Bicycle seat" – Loss of Bowel/Bladder control and saddle anesthesia (numbness in perineal area) are surgical emergencies.
High-Frequency NCLEX Topics The SLR test is a classic NCLEX assessment skill. Expect questions linking specific assessment findings (radiating pain, positive SLR) to the nursing diagnosis of Acute Pain and to patient education on body mechanics and activity modification. Watch Out for Question Variations! • Instead of asking for the indicative finding, a question might ask: "Which instruction is most important for a client with a positive SLR test?" (Answer: Teach proper body mechanics, like log-rolling and avoiding lifting).
• Or: "Which finding requires immediate notification of the provider?" (Answer: New-onset urinary incontinence or saddle anesthesia, indicating cauda equina syndrome).

임상 시나리오

Nursing Clinical Practice Guide Clinical Scenario: Mr. Johnson, 58, is admitted to your medical-surgical unit with severe left-sided sciatica. He rates his pain as 8/10, describes it as a "burning electric shock" down his leg, and reports numbness on the lateral side of his left foot. He is anxious and unable to find a comfortable position.

Nursing Intervention Strategy:
1. Assessment: Perform a focused neurological assessment. Check sensation in dermatomes L4, L5, S1 (top of foot, between big and second toe, lateral foot). Assess motor strength (dorsiflexion and plantar flexion of the foot). Perform the SLR test carefully, stopping immediately if pain radiates.
2. Pain Management: Administer prescribed analgesics (NSAIDs, possibly opioids for severe pain) and evaluate effectiveness using a pain scale. Apply ice packs to the lower back for 20-minute intervals to reduce inflammation.
3. Positioning & Mobility: Assist the patient into a position of comfort, often side-lying with knees flexed and a pillow between the legs. Instruct on log-rolling technique for bed mobility. Avoid prolonged sitting.
4. Education & Discharge Planning: Teach proper body mechanics (bend at knees, not waist). Discuss activity modifications (avoid heavy lifting, twisting). Reinforce the importance of prescribed physical therapy exercises to strengthen core muscles.

Patient Safety and Precautions: Key Point! Continuously monitor for signs of Cauda equina syndrome: sudden loss of bowel or bladder control, severe or progressive leg weakness, or perineal/saddle numbness. This is a neurosurgical emergency requiring immediate intervention.
Nursing Procedure & Medication Flow • Performing an SLR Test: Explain the procedure. With patient supine, passively raise the unaffected leg first (as a baseline), then the affected leg, keeping the knee straight. Slowly elevate the leg until the patient reports pain. Note the angle and the location of the pain (back vs. radiating below knee).
• Medication Administration: NSAIDs should be taken with food to prevent GI upset. Monitor for signs of bleeding. For muscle relaxants, warn about sedation and advise against driving or operating machinery.
A Word from Your Senior Nurse "Back pain is incredibly common, but as nurses, we need to look beyond the complaint. A positive SLR test helps us connect the dots between the patient's pain and its likely source. Your thorough neurological assessment is what catches the red flags before they become catastrophes. In clinicals and on the NCLEX, always think: 'What is the worst possible complication for this condition, and what are its signs?' For a herniated disc, that's cauda equina syndrome. Being able to identify that will save a patient's neurological function and definitely show up on your exam!"

핵심 개념

  • Straight Leg Raise (SLR) Test — A physical examination maneuver where the patient's leg is raised while keeping the knee straight. A positive test, indicated by reproduction of radicular pain (pain radiating below the knee), suggests irritation or compression of the sciatic nerve roots, commonly due to lumbar disc herniation.
  • Sciatica — Pain that radiates along the path of the sciatic nerve, from the lower back through the hip and buttock and down the leg. It is typically caused by compression of a spinal nerve root in the lumbar spine.
  • Cauda Equina Syndrome — A rare but serious surgical emergency caused by compression of the cauda equina (the bundle of nerve roots at the end of the spinal cord). Key symptoms include loss of bowel/bladder control, saddle anesthesia, and severe or progressive leg weakness.
  • Radicular Pain — Pain that radiates from the back into the leg along the course of a spinal nerve root. It is often sharp, burning, or electric-like and follows a specific dermatomal pattern, distinguishing it from localized or referred pain.
  • Body Mechanics — The coordinated effort of muscles, bones, and the nervous system to maintain balance, posture, and alignment during movement, lifting, and transferring. Proper body mechanics are essential education for patients with back injuries to prevent further strain.

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