pain Flashcards
JCAHO changed pain management
mandation: need to document pain, tx
mech of pain management: #1
remove cause
mech of pain management: dec. inflammation, irritation, sensitivity of nerve endings
aspirin (prototype NSAID), NSAIDs
mech of pain management: block conduction of impulses by pain fibers
local anesthetics (lidocaine)
mech of pain management: modify processing of pain info in CNS
opioids: morphine
others: aspirin, acetominophen, NSAIDS
aspirin, ibuprofen, NSAIDs work via
- inhib. prostaglandin synthesis (COX-1, COX-2)
- alleviate pain by acting at nerve endings and in CNS
- antiinflammatory effects contribute to pain relief
- pain relieving dose is less than anti-inflammatory dose*
aspirin, ibuprofen, NSAIDs side effects
GI: irritation, bleeding
CV: HTN, MI, stroke
pain pathway
nociceptors–>afferent fibers–>DRG–>substantia gelatinosa–>STT–>thalamus–>TO BOTH: sensory cortex (feel the pain) and limbic system (emotional response)
pain mediators
endorphins, enkephalins, serotonin, NE, substance P, prostaglandins
opioids work primarily on the…
limbic system; pain does not cause as much distress
acetaminophen works via
inhib. PG syn. in CNS nerve endings (not in periphery)
also alleviates pain at nerve endings in CNS (unclear mech)
acetaminophen does NOT
affect inflammation
cause GI irritation
acetaminophen risks
hepatotoxicity at high doses (4 g/day)
*not only a problem with OD, ALSO with moderate doses if other risk factors (hepatitis, etOH) (2.5-3 g/day)
NSAIDs also have
anti-pyretic activity (lower fever)
Ketorolac (Toradol)
ACUTE pain management (not as much for anti inflammatory)
musculoskeletal, post-op, visceral (kidney stone, gall bladder stones)
injectable NSAID
-alt. to opioid for pain