Palliative Care Flashcards
What is an unlicensed medication?
one not approved for marketing in the UK for use in humans for any indication
what is an off-license use of medication?
a licensed medication used for an unlicensed indication - can be route or dose as well as indication
How long does pain have to be present for it to be defined as chronic?
3 months or more
what is pain?
An unpleasant sensory and emotional experience associated with, or resembling that associated with, actual or potential tissue damage
what is allodynia?
when pain is experienced with sensory inputs that do not normally cause pain
what are the two types of primary afferent nociceptors (nerve fibres) that transmit pain?
C-fibres
A-Delta fibres
what kind of pain do C fibres transmit?
transmit signals slowly and produce dull, diffuse pain sensations
unmyelinated and small diameter neurons
what kind of pain do A-delta fibres transmit?
fast and sharp, localised pain sensation
myelinated larger neurones
what are 2 ways to measure pain?
Numerical rating scale
Visual analogue scale
what is step one on the pain ladder?
non-opioid simple pain killers - paracetamol, NSAIDs
what is step 2 on the pain ladder?
weak opioids - codeine, tramadol
what is step 3 on the pain ladder?
strong opioids - morphine, oxycodone, fentanyl, buprenorphine
what are 4 medications used to treat neuropathic pain?
Amitriptyline
gabapentin
pregabalin
duloxetine
Also capsaicin cream (from chillis) for localised areas
what questionnaire can be used to assess the likelihood of neuropathic pain?
DN4 questionnaire - score >4
what are 6 key side effects of NSAIDs?
Gastritis + dyspepsia
stomach ulcers
exacerbation of asthma
hypertension
renal impairement
coronary artery disease, HF, stroke
what are 6 key side effects of opioids?
constipation
pruitus
nausea and vomiting
altered mental state - sedation, confusion, cognitive impairement, hallucination
respiratory depression
urinary retention
what is the antidote to opioids?
naloxone
what specialist medication can be used to prevent opioid constipation while maintaining analgesia?
methylnaltrexone bromide SC injection dose dependant on body weight
what laxatives should be prescribed alongside opioids?
Stimulant - senna
15mg in the evening - not constipated
15mg BD - constipated
increase dose if ineffective to max of 30mg TDS
how long does modified release morphine last?
12 hours
what does should PRN rescue opioids be?
1/10th to 1/6th of the daily 24h dose
what is the equivalent 10mg PO morphine dose of codeine?
100mg PO codeine
what is the equivalent 10mg PO morphine dose of tramadol?
100mg PO Tramadol
what is the equivalent 10mg PO morphine dose of oxycodone?
6.6mg PO oxycodone
what is the equivalent 10mg PO morphine dose of IV/SC/IM morphine?
5mg IV/SC/IM morphine
what is the equivalent 10mg PO morphine dose of IV/IM/SC diamorphine?
3mg IV/IM/SC diamorphine
what dose of morphine over 24 hours is equivalent to a 5mcg/h patch of buprenorphine?
12mg/24 hours of oral morphine
what dose of morphine over 24 house is equivalent to 12mcg/h patch of fentayl?
30mg/24 hours of oral morphine
what are 5 alternative ways to deal with chronic pain?
supervised group exercise
acceptance and commitment therapy (ACT)
CBT
Acupuncture
Antidepressants
what 3 electrolyte imbalances can cause nausea?
Hyponatraemia
Hypocalcaemia
Hypercalcaemia
what are the 5 areas that can trigger the vomiting centre of the medulla?
GI Tract - gastric stasis, intestinal obstruction, gastric irritation
Chemoreceptors - biochemical upset, drugs, electrolyte imbalance
Vestibular input - motion sickness, morning sickness
Higher centres - from cortex - anxiety, smells/sights
Increased intracranial pressure
what are 4 non-pharmacological ways to manage nausea?
control odours
minimise sight/smell of food
small snacks not large meals
acupressure wrist bands
what is the nausea and vomiting like in gastric stasis?
large volumes
infrequent
vomiting relives symptoms
oesophageal reflux
epigastric fullness
early satiation
what is the nausea and vomiting like in gastric outflow obstruction?
Similar to gastric stasis
more forceful and rapid dehydration
what is the nausea and vomiting like in oesophageal blockage?
brings just swallowed food back up
soon after eating and drinking
sensation of food sticking
what is the nausea and vomiting like in raised ICP?
effortless vomiting often in morning
associated with headache, papilloedema
nausea - may be diurnal
what is the nausea and vomiting like in chemically induced nausea?
constant nausea
variable vomiting
What drug class is haloperidol?
Butyrophenone antipsychotics - used as antiemetic
what condition is a contraindication to the use of haloperidol?
parkinsons
what types of nausea is haloperidol good for?
chemical causes - opioids, chemotherapy