Pain Flashcards
Comfort and Pain are
subjective
Pain is no longer considered a symptom of an illness but is considered a
separate disease
pain is
- most common reason why patient seeks healthcare 2. whatever your patient says it is
nature of pain
physical, emotional, cognitive, and subjective
stimulis
can be physical and mental
physiology of pain
4 processes of nociceptive (normal) pain
4 processes of nociceptive (normal) pain:
transduction, transmission, perception, modulation
transduction
the process of converting thermal, chemical, or mechanical energy to electrical energy; begins in the periphery
Once transduction is complete, ____________ of the pain impulse begins. *
transmission
When cellular damage occurs, pain-sensing substances
called excitatory neurotransmitters (such as prostaglandins, potassium, histamine, and substance P) surround the pain fibers and begin spreading the pain message – causing an inflammatory response.
*Pain fibers enter the
spinal cord – ends within the gray matter where cell bodies, axons, and dendrites are located.
Within the dorsal horn, _________ is released, and causes
substance P; causing a synapse from the afferent / sensory peripheral nerves to nerves within the spinothalamic tract
*Two types of peripheral nerve fibers conduct painful stimuli:
(1) the fast, myelinated “A” fibers send sharp, localized and distinct sensations that localize the source of pain and detects its intensity. (2) the very slow, small, unmyelinated “C” fibers relay impulses that are poorly localized, aching, burning, and persistent. *(Trace the transmission of the pain stimulus.)
perception
is the point at which a person is aware of pain
The somatosensory cortex identifies
the location and intensity of pain.
The association cortex determines
how we feel about the pain.
modulation
The inhibition of pain impulse *(What happens when the brain perceives the pain?)
Protective Reflex:
“A” Fibers send sensory impulses to the spinal cord - synapse occurs - motor impulses travel via the reflex arc along efferent / motor nerve fibers back to a peripheral muscle near the site of stimulation. Bypassing the brain. Contraction of the muscles leads to a protective withdrawal from the source of pain.
Gate-Control Theory of Pain:
Pain impulses can be regulated or blocked by gating mechanisms located along the central nervous system. Closing a gate is the basis for pain relief interventions.
Pain Threshold
is the point at which a person feels pain. Stress, exercise, and other factors that increase the release of endorphins will increase an individuals pain threshold. Massage & therapeutic touch are also supported by this theory
sympathetic stimulation -
increased respirations & heart rate; elevated B/P; increased glucose; diaphoresis; muscle tension; dilated pupils; decreased GI motility. Pain of low to moderate intensity and superficial pain elicit the fight or flight reaction.
parasympathetic stimulation -
decreased heart rate & B/P; rapid-irregular breathing; pallor; muscle tension. Usually seen when pain is continuous, severe, or deep – involving visceral organs (heart, gall bladder, kidneys).
Over time, the individual adapts to the change and the physical signs will return to normal; therefore,
clients in pain will NOT ALWAYS have changes in vital signs.
Once pain is experienced, a cycle of events begins and may alter one’s ___________________________ if left untreated.
cycle of life