Core Nursing Explanation
Key Concept Analysis: This question assesses proper positioning for a patient with
Hemiparesis (one-sided weakness) following a
Stroke (Cerebrovascular Accident, CVA). The goal is to prevent common complications of immobility and neurological impairment while promoting functional recovery. Key principles include preventing
shoulder subluxation (partial dislocation),
contractures,
edema, and
aspiration.
Answer Rationale:
Key Point! Positioning on the
unaffected side with the
affected arm supported on a pillow is a standard, protective intervention. This position:
1.
Protects the shoulder: The pillow supports the full length of the flaccid arm, preventing the weight of the arm from pulling the humeral head out of the glenoid fossa (subluxation).
2.
Promotes drainage: Elevating the arm on a pillow facilitates venous and lymphatic drainage, reducing dependent edema.
3.
Maintains alignment: It helps maintain functional anatomical alignment of the joints, preventing contractures.
4.
Enhances safety: Lying on the unaffected side reduces the risk of aspiration if the patient has dysphagia, as secretions are less likely to pool in the dependent airway.
Distractor Analysis:
•
Watch out for confusion! Option ①: Positioning on the
affected side for extended periods is contraindicated early on. It can cause excessive pressure on the insensate limb, leading to skin breakdown (pressure injury), and does not properly support the shoulder joint, risking injury.
• Option ②: Keeping the arm in a
dependent position is harmful. It promotes gravitational dependent edema, increases pain, and is a primary cause of shoulder subluxation due to the unsupported weight of the limb.
• Option ③: Maintaining a
supine position with pillows under the knees promotes hip and knee flexion contractures. It also places the patient at higher risk for aspiration and does nothing to support the affected upper extremity.
Related Concepts: Proper positioning is part of the
Neurodevelopmental Sequence (NDT) or Bobath approach to stroke rehabilitation. Other key interventions include
range of motion (ROM) exercises, use of a
lap tray or arm trough when sitting, and early mobilization to prevent complications like deep vein thrombosis (DVT) and pneumonia.
Concept Summary
•
Goal: Prevent subluxation, contractures, edema, aspiration, and skin breakdown.
•
Key Position: Side-lying on unaffected side with affected arm supported on pillows.
•
Other Positions: Supine with affected shoulder protracted and arm supported; sitting with arm supported on a lap tray.
•
Complications to Prevent: Shoulder subluxation, shoulder-hand syndrome, flexion contractures, pressure ulcers, dependent edema.
Side-by-Side Comparison!
| Positioning Strategy | Rationale & Benefit | Risk if Misapplied |
|---|
| Side-lying on Unaffected Side (Correct) | Protects shoulder, reduces edema, prevents aspiration, maintains alignment. | Must ensure proper pillow support under entire affected arm and leg. |
| Supine with Knees Flexed | Sometimes used briefly for comfort. | Promotes hip/knee flexion contractures; poor for airway or arm support. |
| Affected Arm Dependent | None. | Causes shoulder subluxation, edema, pain (Shoulder-hand syndrome). |
Anatomy, Physiology & Pharmacology Points
•
Anatomy: The shoulder joint (glenohumeral joint) is a shallow ball-and-socket joint, inherently unstable. Muscular tone (especially from the rotator cuff) is required for stability. Flaccid paralysis after a stroke removes this support.
•
Pathophysiology:
Hemiparesis leads to loss of motor and sensory function. Without intervention, gravity pulls the humerus downward, stretching the joint capsule and causing subluxation.
•
Pharmacology (Indirect): Medications like anticoagulants (e.g., warfarin, apixaban) may be used for stroke prevention, but do not directly affect positioning needs. Pain management (e.g., for shoulder pain) may be necessary.
Memory Tips
•
Acronym: S.P.A. for priorities in affected arm care:
Support (with pillows),
Protract the shoulder (gently forward),
Avoid dependency.
•
Visual Cue: "The good side down." Lie on the strong (unaffected) side to protect the weak side.
•
Mnemonic: "Pillows Prevent Problems" – Use pillows to support, elevate, and align.
High-Frequency NCLEX Topics
Positioning for stroke patients is a
Core safety and basic care topic. The NCLEX-RN frequently tests:
1. Identifying
correct vs. harmful positioning techniques.
2. Linking a position to the
complication it prevents (e.g., "Which position prevents shoulder subluxation?").
3. Prioritizing care: Positioning, airway, and skin integrity are often high-priority interventions.
Watch Out for Question Variations!
• Instead of asking for the position, the question may ask:
"The nurse is evaluating care for a client with left hemiparesis. Which observation indicates the positioning is effective?" (Correct answer: Affected arm is supported on a pillow without edema).
• Or:
"Which finding requires immediate intervention for a client post-stroke?" (Correct answer: Affected arm hanging loosely at the side of the wheelchair).
• The concept can be integrated with
aspiration precautions (positioning to protect the airway) or
range of motion exercises.