Part 2-1 (Management of pain and inflammation) Flashcards
Analgesics
Opioids
Nonopioids
Anti-inflammatory agents
NSAIDs
Glucocorticoids
Opioids
Narcotics
Morphine
Nonopioids
NSAIDs
Acetominophen
Opioid Analgesics
Alter pain perception
Used in moderate-severe pain
Indicated in: acute pain (sx, trauma) chronic pain (Cancer)
Common opioids
Codeine Fentanyl Hydrocodone Morphine Oxycodone Tramadol
Types of Opioids
Strong agonists (Morphine, fentanyl)
Moderate agonists (Codeine, Oxycodone)
Antagonists (Naloxone)
Mixed agonists/antagonists
Opioids primary mechanisms of action
Act on: Spinal cord dorsal grey matter, Brain
Bind to specific receptors located on presynaptic nerve terminals and postsynaptic neurons
Opioids can also affect
Peripheral neurons: decrease sensitivity of neuron that initiates painful impulse
Descending pain pathways: remove inhibition of central anti-pain circuits
Opioid Summary
- Decrease synaptic activity in ascending pain pathways
- Decrease sensitivity of sensory neurons that send pain
- Activate descending anti-pain pathways
Opioid mild adverse effects
Sedation Mood changes Confusion Nausea Constipation
Opioid serious adverse effects
Orthostatic hypotension
Respiratory depression
Potential for addiction
Tolerance
Need more drug to achieve same effect
Physical dependence
Onset of withdrawal if drug suddenly stopped
Opioid withdrawal physical symptoms
Body aches Gooseflesh Weakness/fatigue Sweating Tachycardia
Risk of Opioid tolerance and dependence minimal if
Patient doesnt have hx of substance abuse
Pain is physiological
Dosage matches pt’s pain levels
Role of PCA
Patient controlled analgesia
Pump prevents overdose
Smaller, more frequent doses
PCA benefits
Better pain control with fewer side effects
Increased patient satisfaction
Requires patient awareness
Opioid induced hyperalgesia
May increase pain in some patients
Opioids turn on nociceptive pathways that use glutamate
Opioids rehabilitation concern
Be alert for orthostatic hypotension
Monitor for signs of respiratory depression
Monitor pain levels