Pain Assessment Scales in Nursing: A Comprehensive Guide

Why Pain Assessment Matters

Pain is the "5th vital sign." Accurate assessment drives appropriate interventions and improves patient outcomes.

Self-Report Scales (Patient Can Communicate)

Numeric Rating Scale (NRS)

• Range: 0-10
• 0 = no pain, 10 = worst pain imaginable
• Most widely used in adult patients
• Mild (1-3), Moderate (4-6), Severe (7-10)

Visual Analog Scale (VAS)

• 100mm line from "no pain" to "worst pain"
• Patient marks a point on the line
• More precise than NRS

Wong-Baker FACES Pain Rating Scale

• Ages 3+ years
• Six faces from smiling (0) to crying (10)
• Patient chooses the face that represents their pain
• Does NOT measure happiness: measures pain intensity

Brief Pain Inventory (BPI)

• Multidimensional assessment
• Measures pain intensity AND interference with function
• Used for chronic pain evaluation

Behavioral Scales (Patient Cannot Self-Report)

FLACC Scale (2 months - 7 years)

Scores 0-2 for each:

• F: Face (relaxed → constant grimace)
• L: Legs (relaxed → kicking)
• A: Activity (lying quietly → arched/rigid)
• C: Cry (no cry → constant crying)
• C: Consolability (easily consoled → inconsolable)
• Total: 0-10

CPOT (Critical-Care Pain Observation Tool)

For intubated/non-verbal ICU patients:

• Facial expression (0-2)
• Body movements (0-2)
• Muscle tension (0-2)
• Ventilator compliance or vocalization (0-2)
• Total: 0-8

Abbey Pain Scale

For dementia patients. Assesses:

• Vocalization
• Facial expression
• Body language
• Behavioral changes
• Physiological changes
• Physical changes

Pain Assessment Best Practices

1. Believe the patient: pain is subjective
2. Use the appropriate scale for the patient's age and ability
3. Assess regularly: before and after interventions
4. Document comprehensively: use OLDCARTS framework
5. Reassess after intervention: typically 30-60 minutes
6. Consider cultural factors affecting pain expression

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Where to go next

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