Intro to Pain Management Flashcards
negative consequences of pain
- hyperalgesia
- sympathetic stimulation
- decreased appetite
- increased anesthetic drug requirements
- serious behavioral, nuerohumoral, metabolic and immunological effects
- unseen changes to CNS
definition of pain
an unpleasant sensory and emotional experience with actual or potential tissue damage
how is pain perceived
- throughout CNS, primary afferent nerve fibers provide info to the higher centers of the brain
- most animals have sensory afferent nerve fibers that respond to noxious stimuli
- protective means for reflexive withdrawal to noxious stimuli
adaptive pain-inflammatory
spontaneous pain and hypersensitivity to pain in response to tissue damage and inflammation
occurs with tissue trauma, injury, surgery
adaptive pain-nociceptive
transient pain in response to noxious stimulus
small aches and pains that are relatively innocuous and that protect the body from the environment
allodynia
- pain caused by a stimulus that does not normally result in pain
- manifestation of peripheral nerve and tissue injury that induces changes in CNS
analgesia
absence of pain in response to stimulation that would normally be painful
anesthesia
medically induced insensitivity to pain
the procedure may render the patient unconscious (general anesthesia) or consist of local anesthesia
dysphoria
a state of anxiety or restlessness, often accompanied by vocalization
hyperalgesia
- an increased response to a stimulus that is normally painful and reduced threshold for pain
maladaptive pain-neuropathic
spontaneous pain and hypersensitivity to pain in association with damage to or a lesion of the nervous system
maladaptive pain-central neuropathic pain
pain initiated or caused by a primary lesion or dysfunction in the CNS
“central pain”
multimodal analgesia
use of more than one drug with different actions to produce optimal analgesia
peripheral neuropathic pain
pain initiated or caused by a primary lesion or dysfunction in the peripheral nervous system
preemptive analgesia
administration of an analgesic before painful stimulation
wind-up pain
- perceived increase in pain intensity over time when a painful stimulus is repeatedly delivered above a critical rate
- frequency dependent increase in excitability of spinal cord neurons (afferent C fibers) - central sensitization