Pain Assessment Flashcards
What is the fifth vital sign?
Pain
What is pain defined as?
An unpleasant sensory and emotional experience associated with, or resembling with, actual or potential tissue damage.
Pain is subjective. What does this mean?
It is whatever the person says it is, existing wherever the person says it does.
What are nociceptors?
Designed to detect painful sensations from the periphery and transmit them to the CNS.
Where are nociceptors located?
Within the skin, joints, connective tissue, muscle, and in the thoracic, abdominal and pelvic viscera.
When does nociceptive pain develop?
When functioning and intact nerve fibers in the CNS and periphery are stimulated.
Is nociceptive pain triggered by inside or outside events of the nervous system?
outside of the nervous system. The actual nervous system is intact when nociceptive pain is triggered.
What are the four stages of nociception in order?
Transduction
Transmission
Perception
Modulation
What happens in the transduction phase?
Noxious stimulus takes place in the periphery and then moves to the spinal cord.
What happens in the transmission phase?
Pain moves from the spinal cord to the brain.
What happens in the perception phase?
Conscious awareness of pain sensations
What happens in the modulation phase?
Inhibition of pain sensation; built-in mechanism to control intensity of pain.
What are the four basic approaches to treating pain?
- We can modify the source of pain (transduction)
- We can attempt to modify the movement of the painful stimuli (transmission)
- We can modify the awareness of pain in the CNS (perception)
- We can block the transmission of pain to the CNS (modulation)
We use pharmaceuticals for all other approaches except for perception.
What is neuropathic pain?
Abnormal processing of pain messages. Does not follow the predictable phases of nociceptive pain.
What level is neuropathic pain at?
It is at the neurochemical level.
What are characteristics of neuropathic pain?
Minor stimuli can cause significant pain
The most difficult type of pain to assess and treat
Pain is perceived long after injury (chronic)
Can nociceptive pain change into neuropathic pain?
Yes, when the nociceptive pain is poorly controlled.
What are sources of pain?
Visceral pain
Deep somatic pain
Cutaneous pain
Referred pain