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Special Considerations in Pain Management | 마이메르시 MyMerci
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Special Considerations in Pain Management

NCLEX Review Guide: Pharmacology - Analgesics & Special Considerations in Pain Management

Opioid Analgesics

Mechanism of Action & Classifications

  • Opioids bind to mu, kappa, and delta receptors in the CNS to block pain transmission and alter pain perception.
  • Full agonists (morphine, fentanyl, oxycodone) provide maximum receptor activation, while partial agonists (buprenorphine) have a ceiling effect for respiratory depression.

Clinical Scenario

A post-operative patient receiving morphine 4mg IV q4h reports pain level 8/10. Before increasing the dose, assess for respiratory rate <12/min, sedation level, and oxygen saturation.

Key Points

  • Monitor respiratory status every 15-30 minutes after IV opioid administration
  • Naloxone (Narcan) reverses opioid effects but has shorter half-life than most opioids
  • Equianalgesic dosing prevents under/over-medication when switching opioids

Non-Opioid Analgesics

NSAIDs & Acetaminophen

  • NSAIDs inhibit cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis and providing anti-inflammatory, analgesic, and antipyretic effects.
  • Acetaminophen works centrally on hypothalamic heat-regulating centers and has minimal anti-inflammatory effects but excellent analgesic properties.

NSAID vs Acetaminophen Comparison

AspectNSAIDsAcetaminophen
Anti-inflammatoryYesMinimal
GI RiskHighLow
HepatotoxicityLowHigh (overdose)
Renal EffectsNephrotoxicMinimal

Key Points

  • Maximum acetaminophen: 4g/day (3g/day for chronic use)
  • NSAIDs contraindicated in severe heart failure, advanced CKD
  • Take NSAIDs with food to reduce GI irritation

Special Populations

Pediatric & Geriatric Considerations

  • Pediatric patients require weight-based dosing and age-appropriate pain assessment tools (FLACC scale <3 years, numeric scale >7 years).
  • Geriatric patients have increased sensitivity to opioids due to decreased metabolism, requiring "start low, go slow" approach with 25-50% dose reduction initially.

Memory Aid: Pediatric Pain Assessment

FLACC Scale: Face, Legs, Activity, Cry, Consolability (ages 2 months-7 years)

FACES Scale: Wong-Baker FACES (ages 3+ years)

Numeric Scale: 0-10 rating (ages 7+ years)

Key Points

  • Never use aspirin in children <18 years (Reye's syndrome risk)
  • Elderly patients at higher risk for falls due to sedation effects
  • Assess cognitive function before and during opioid therapy in elderly

Common Pitfalls & Study Tips

Frequently Confused Concepts

Tolerance vs Physical Dependence vs Addiction

ConceptDefinitionClinical Significance
ToleranceNeed for higher doses for same effectNormal physiologic response
Physical DependenceWithdrawal symptoms when stoppedExpected with prolonged use
AddictionCompulsive use despite harmPsychological disorder

Memory Aid: Pain Assessment

PQRST Method:

  • Provocation/Palliation
  • Quality
  • Radiation/Region
  • Severity
  • Timing

    Opioid Administration Protocol

  1. Assess pain level using appropriate scale
  2. Check vital signs, especially respiratory rate
  3. Verify patient identity and medication order
  4. Administer medication via prescribed route
  5. Monitor for effectiveness and adverse effects
  6. Document response and any side effects

Quick Check Questions

  • ☐ Can you list three signs of opioid overdose?
  • ☐ What is the antidote for acetaminophen toxicity?
  • ☐ When should you hold an opioid dose?
  • ☐ What pain scale is appropriate for a 5-year-old?

Remember: Pain is the 5th vital sign! Your thorough assessment and safe medication administration will make a real difference in your patients' comfort and recovery. You've got this, future nurse! 💪

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