Pain Assessment Flashcards
5th vital sign
pain
the most common reason to seek medical advice
pain
a portective mechanism or a warning to prevent injury
pain
nociceptors also called as
pain receptors
are the nerve endings in the skin that respond only to intense, potentially damaging stimuli
nociceptors
do not contain nerve endings
large intestine organs
______________________________________________________________________________________________ also have nociceptors
joints, skeletal muscle, fascia tendons and cornea
are chemicals that incraese transmission of pain
histamine, bradykinin, acetylcholine, serotonin and substance P
are chemical substances that are believed to increase the sensivity of pain receptors by enhancing the pain provoking effect of bradykinin
Prostaglandins
2 main types of fibers involved in the transmission of nociceptors:
- myelinated, A delta fibers - “first pain”
- Type C fibers - “2nd pain”
chemicals that reduce or inhibit transmission of perception of pain include:
endorphins and enkaphalins
Process of Pain
- Transduction
- Transmission
- Perception
- Modulation
injured tissue releases chemicals that affect nociceptors sending pain messages up/to sensory neuron
Transduction
pain impulse from the nociceptors to the brain
transmission
pain percieved by the brain
Perception
pain message is inhibited by brain stem neuron release of endogenous neurotransmitters
Modulation
Gate Control Theory was proposed by whom and when?
Melzack and Wall, 1965
main part of Gate Control Theory
spinal cord
- stimulation of the skin evokes nervous impulses
- stimulation of the large diameter fibers inhibits the transmission of pain thus, closing the gate
Gate Control Theory
Types of Pain
Classified according to Duration/Etiology
- Acute
- Chronic
- Cancer-related Pain
- usually of recent onset
- commonly associated with specific injury
- lasting from seconds to 6 months
Acute Pain
- constant or intermittent pain that persists beyond the expected healing time
- seldom attributed to a specific injury
- lasts for 6 months or longer
Chronic Pain
Types of Pain
Classified by location/perception
Visceral
Somatic
Cutaneous
Radiating
Referred
Phantom
internal organs (pain)
visceral pain
pain in muscles, joints
somatic pain
pain in skin -> nerve endings (superficial)
cutaneous pain
pain that travels from one body part to another. This pain starts in one place and then spreads into a broader area of the body
radiating pain
occurs when pain receptors in the pelvis, abdomen, chest, or intestines are activated. We experience it when our internal organs and tissues are damaged or injured.
visceral pain
can be deep or superficial, with the deeper pain coming from the skeletal structure, tendons, and muscles.
somatic pain
Pain that arises from the skin and muscles or peripheral nerves themselves
cutaneous pain
when you have an injury in one area of your body but feel pain somewhere else. This happens because all the nerves in your body are part of a huge, connected network.
referred pain
when you feel pain in a body part that you no longer have
phantom pain
Classification of Pain (other categories)
- Neuropathic Pain
- Nociceptive Pain
- Psychogenic Pain
- Intractable Pain
nerves (pain)
Neuropathic Pain