Pain & Palliative Care Flashcards
QUESTT
o Question the child and/or parent
o Use a valid and reliable pain scale
o Evaluate the child’s baseline and response to intervention
o Secure parental involvement (this can mean many things!) Can mean they are there during or come back after and console. Can involve breastfeeding. Assess what family wants!
o Take the cause of pain into account
o Take action
what is pain?
- an unpleasant sensory and emotional experience that is associated with actual or potential damage
- can be emotional or physical
what are some of the negative consequences of untreated pain in children?
- increased oxygen consumption
- alterations in blood glucose metabolism
- increased anxiety
what is the sequence of physiologic events in the nervous system that contributes to the sensation of pain?
- transduction (conversion of external stimuli into a pain signal)
- transmission (pain signal being directed to wards spinal cord and brain)
- modulation (process of dampening or amplifying pain signals)
- perception (awareness of pain)
what are nociceptors?
- nociceptors are specialized receptors at the end of peripheral nerve fibres.
- become activated when they are exposed to noxious stimuli (can be mechanical, chemical, or thermal)
- when nociceptors are activated, transduction, the first event in the sensation of pain is occuring
how does transmission of a pain stimulus occur?
- after nociceptors are activated by a stimuli, there is a conversion to electrical impulse that is relayed along peripheral nerves to the spinal cord and brain
- mylenated A-delta fibres are long and conduct the impulse rapidly (pain transmitted along these often called fast pain) and are often associated with mechanical or thermal pain
- unmylenated c fibres transmit impulse slowly, are often associated with chemical pain
- the fibres carry the impulse to the spinal cord via the dorsal horn
- neurotransmitters are released to facilitate transmission to brain
how does perception of pain occur?
- after transmission occurs in the dorsal horn of the spinal cord, the nerve fibres run up to the thalamus
- thalamus responds quickly to send message to somatosensoy cortex of brain where the impulse is interpreted as physical pain
- impulses carried by a-delta fibres leads to perception of sharp, stabbing, localized pain and often involves a reflex response to withdraw from stimulus
- impulses carried by c fibres leads to perception of diffuse, dull, burning or aching pain
- thalamus also sends message to limbic system to interpret sensation emotionally and to the brain stem centres where autonomic nervous system begins to respond
what is the pain threshold?
the point at which a person feels the lowest intensity of a painful stimulus
what are neuromodulators?
- substances that appear to modify pain sensation
- change a persons perception of pain
- include serotonin, endorphins, enkephalins, dynophins
what is nociceptive pain?
- pain that reflects due to activation of a-delta fibres and c fibres by a noxious stimuli
- perceived pain often correlates closely with degree or intensity of stimulus and extent of real or possible damage
- nervous system functioning is intact
what is neuropathic pain?
- nerve pain
- occurs because of malfunctioning of the peripheral or central nervous system
- may be continuous or intermittent
- commonly felt as burning, tingling, shooting, or stabbing
- may be spontaneous or evoked by a trigger
- may be associated with motor abnormalities
what is somatic pain?
pain that develops in tissue
what is visceral pain?
pain that develops within organs
what are the characteristics of acute pain?
- caused by an obvious, often single, cause
- nociceptive and/or neuropathic
- has a protective purpose, activation of sympathetic nervous system
- lasts for days to weeks at most
- pain intensity is usually proportionate to severity of injury
- usually easy to treat with single modalities
- expected to resolve with healing
what are the characteristics of chronic pain?
- usually multiple causative or triggering factors
- neuronal or CNS abnormality (plasticity, sensitization)
- type of pain is nociceptive, neuropathic, or mixed and may involved psychological factors
- there is no protective function
- rarely accompanied by signs of activation of sympathetic nervous system
- long lasting or recurring beyond time of normal healing
- may be associated with chronic disease
- often out of proportion to objective physical findings
- more difficult to treat, requires multidisciplinary, multimodal approach
- pain persists in significant number of patients, with small proportion developing pain-associated disability syndrome
what is nociception?
the encoding and processing of harmful stimuli in the central nervous system