Palliative Care Flashcards
What symptoms are commonly seen in patients nearing the end of life?
- Agitation
- Pain
- Excess secretions
- N&V
- Breathlessness
- Constipation
What are anticipatory medications?
End of life medicines
What are the 4 main classes of anticipatory medication?
1) Analgesia - for pain
2) Anti-emetic - for N&V
3) Anxiolytic - for agitation
4) Anti-secretory - for respiratory secretions
How are anticipatory medications usually prescribed?
Anticipatory medications are prescribed as SC injections (injected under the skin) as patients nearing the end of life are often unable to take oral medications.
They should be prescribed PRN, or ‘as needed’, rather than regularly.
Unless the patient has previously received the medications, a low dose should be started and titrated up according to response.
When prescribing anticipatory medications, what details should be included?
- Drug name
- Drug dose
- Route e.g. (SC)
- Indication for each medication: to make it clear which medication should be used for which symptom
- Frequency of delivery (e.g. 1 hourly)
- Maximum dose in twenty-four hours: to ensure safe levels of medication are given, this will also prompt regular reviews if a patient is requiring frequent doses
Choice of medication and starting doses vary depending on several patient factors such as:
1) PMH –> e.g. specific considerations for patients with Parkinson’s disease, lower starting doses are used in frail patients.
2) Organ dysfunction –> renal and liver dysfunction affect the choice of medications and require lower starting doses
3) DH –> if patients are already on a background opiate their PRN dose should be calculated based on this, rather than using the dose for an opioid naïve patient
Recognising pain in end of life patients is important, especially if patients are less responsive and therefore unable to articulate symptoms.
What changes might be observed that could indicate pain?
- Facial expressions such as grimacing
- Verbalisations such as moaning or shouting out
- Body movements such as guarding a particular area/part of the body
- Autonomic reactions such as increased heart rate or temperature
What is a common first line analgesic in end of life patients?
Morphine sulphate
What dose of Morphine sulphate is typically given for opiate naïve patients in end of life care?
1 – 2.5mg SC.
Do not repeat within 1-hour
Maximum 4 doses in 24 hours
If there is reduced renal function (eGFR <50), what can be used as an alternative to morphine sulphate in end of life care?
Oxycodone 1-2 mg SC
Do not repeat within 1-hour, maximum 4 doses in 24 hours
For patients already on a background dose of opioid medication, what is the PRN anticipatory dose?
Generally 1/6th of the total subcutaneous background dose in 24 hours.
Example:
Mr Y has been taking 30mg BD slow-release morphine but is now approaching the last days of life and is not able to swallow his usual medications. This is equivalent to 30mg SC morphine in 24 hours.
What should the PRN anticipatory dose be?
5mg SC morphine (30/6)
What combination of opioids is typically seen in palliative care?
1) Background opioids (e.g., 12-hourly modified-release oral morphine)
2) Rescue doses for breakthrough pain (e.g., immediate-release oral morphine solution) –> these doses arre 1/6 of background dose
Patient X is on 30mg of modified-release morphine every 12 hours; what would be the correct breakthrough dose?
30x2 = 60 –> patient is receiving 60mg background morphine every 24 gours
60/6 = 10mg –> correct breakthrough dose
REMEMBER each rescue dose is 1/6 of the 24-HOUR background dose.
What should you monitor for when prescribing morphine?
- Constipation
- Unwanted sedation
Opioid conversion
The following table shows dose equivalents of 10mg oral morphine:
Codeine/tramadol/dihydrocodeine oral –> 100mg
Diamorphine IM/IV/SC –> 3mg
Morphine IM/IV/SC –> 5mg
Oxycodone oral –> 5mg
Oxycodone SC –> 2.5mg
Alfentanil SC –> 0.3mg
Conversion factor from oral codeine to oral morphine?
Divide by 10
I.e. 100mg of oral codeine = 10mg of oral morphine
Conversion factor from oral tramadol to oral morphine?
Divide by 10
Conversion factor from oral morphine to SC morphine?
Divide by 2
Conversion factor from oral morphine to oral oxycodone?
Divide by 1.3-2 (depends on trust guidelines)
If in doubt, always opt for the lower dose and titrate up.
Conversion factor from oral morphine to SC diamorphine?
Divide by 3-3.3 (trust guidelines)
Conversion rate from oral oxycodone to SC diamorphine?
Divide by 1.5
What is the equivalent dose of oral tramadol to 10mg oral morphine?
100mg
What is the equivalent dose of SC diamorphine to 10mg oral morphine?
3mg
What is the equivalent dose of SC morphine to 10mg oral morphine?
5mg
It is also possible to use opioid patches for background analgesia. What 2 opioid patches are used?
1) Buprenorphine patches
2) Fentanyl patches
When increasing the dose of opioids, what should the next dose be increased by?
30-50%
How do the side effects of oxycodone differ from morphine?
Oxycodone generally causes less sedation, vomiting and pruritis than morphine but MORE constipation.
What should be prescribed for all patients initiating strong opioids?
laxatives
What are some potential causes of N&V in endof life patients?
- Constipation
- Medication side effects
- Biochemical disturbance e.g. hypercalcaemia
What medications can be given for N&V in palliative care?
Levomepromazine
Cyclizine
Haloperidol
Metoclopramide
What are the six broad nausea and vomiting syndromes seen in palliative care?
1) Reduced gastric motility –> may be opioid related, related to serotonin (5HT4) and dopamine (D2) receptors
2) Chemically mediated –> 2ary to hypercalcaemia, opioids, or chemotherapy
3) Visceral/serosal –> e.g. Ddue to constipation, oral candidiasis
4) Cerebral
5) Vestibular
6) Cortical
What are the symptoms of gastric stasis/irritation nausea and vomiting syndrome?
o Sickness comes on very suddenly and is relieved by vomiting
o Early satiety
o Hiccups
o Heart burn
Causes of gastric stasis/irritation nausea and vomiting syndrome?
o Stomach cancer
o Liver mets squashing liver, ascites
o Pyloric stenosis
o Gastritis from NSAIDs etc – stop drug, consider PPI
o Diabetes → slow motility
o May be opioid related
o May be related to serotonin and dopamine receptors
1st line pharmacological management (anti-emetic) of reduced gastric motility N&V in palliative care?
1) Metaclopramide
- 10-20mg PO/SC (30 mins before meals)
- 30-60mg SC over 24 hours
2) Or Dopmeridone
When is Metaclopramide NOT indicated in reduced gastric motility N&V in palliative care?
Should not be used when pro-kinesis may negatively affect the gastrointestinal tract, particularly in complete bowel obstruction, gastrointestinal perforation, or immediately following gastric surgery
What class of drug is metoclopramide?
Anti-emetic –> dopamine (D2) receptor antagonist
Mechanism of action of metoclopramide?
Dopamine D2 antagonist.
Antiemetic effects –> dopamine D2 antagonist in the chemoreceptor trigger zone (CTZ) in the brain. This relieves the symptoms of nausea and vomiting.
Gut motility –> Increases gastric emptying
Via what 3 mechanisms does metoclopramide promote gut motility?
1) inhibition of presynaptic and postsynaptic D2 receptors
2) stimulation of presynaptic excitatory 5-HT4 receptors
3) antagonism of presynaptic inhibition of muscarinic receptors
Why are pro-kinetic agents (e.g. metoclopramide) useful in reduced gastric motility N&V?
As the nausea and vomiting is usually resulting from gastric dysmotility and stasis
What are some causes of toxic/chemically mediated N&V?
o Alcohol
o Chemotherapy/radiotherapy
o Opiates
o Digoxin
o Hypercalcaemia (bone mets)
o Electrolyte abnormality
o Renal/liver failure
o Infections
Symptoms of toxic/chemically mediated N&V?
o Feel sick a lot of the time
o May be sick a little bit but won’t feel much better –> ‘possets’
o Retching
Which anti-emetic is used in toxic/chemically mediated N&V in palliative care?
1) Haloperidol - 1.5-5mg PO/SC nocte
2) Or cyclizine
What are some cerebral causes of N&V in palliative care?
o Brain metastases
o Raised intracranial pressure (usually in context of cerebral metastases)
o Sights/smells
o Anxiety –> before chemo
o Radiotherapy to brain
Symptoms of cerebral causes of N&V in palliative care?
o Early morning headache
o Vomiting
o May be little nausea
o Associated neurological symptoms/signs
Which anti-emetic is used in management of cerebral causes of N&V in palliative care?
1) Cyclizine if rased ICP
2) Dexamethasone
3) Unless Anxiety –> Lorazepam
Which anti-emetic is used in management of anxiety/anticipatory nausea
in palliative care?
Benzos e.g. lorazepam (short dose)
Describe the steps of the analgesic ladder
Don’t use 2 from same step – move up ladder
Step 1:
- Nonopioid analgesics e.g. NSAIDs, paracetamol 1g QDS
Step 2:
- Weak opioids e.g. co-codamol 30/500 2 QDS
Step 3:
- Strong opioids e.g. methadone (oral, transdermal), morphine, codeine
Step 4:
- Nerve block e.g. epidurals
Can use adjuvants at any stage e.g. NSAIDs
What are some potential causes of agitation in palliative care?
- Pain
- Medications (side effects and withdrawals)
- Constipation
- Urinary retention
- Infection
- Hypercalcaemia
Look for and treat underlying causes.
Potential signs of agitation?
Fidgeting/moving arms and legs
Confused
Vocalisations
1st line choice of anxiolytic (for agitation)?
Haloperidol
Other options –> chlorpromazine, levomepromazine
In the terminal phase, what is agitation of restlessness best treated with?
Midazolam
2.5 – 5mg SC. Do not repeat within 1 hour, maximum 4 doses in 24 hours.
Why can end of life patients experience increased secretions?
With reduced levels of consciousness, patients may become unable to swallow or clear their normal respiratory secretions/saliva, resulting in pooling in the upper respiratory tract.
This can cause noisy breathing/a rattling noise as air passes over the pooled secretions.
Non-pharm management of secretions in palliative care?
Offering reassurance to those looking after the patient that it is not a distressing symptom, as well as repositioning the patient may be helpful.
anticipatory medications used for respiratory tract secretions?
Hyoscine butylbromide
20mg SC. Do not repeat within 1-hour, maximum dose 120mg in 24 hours
Others:
- Hyoscine hydrobromide
- Hyoscine butylbromide
- Glycopyrronium
Mechanism of Hyoscine butylbromide?
Has anticholinergic effect –> reduces saliva production (dry mouth)
Potential signs of end of life?
- Profound weakness
- Confined to bed for most of the day
- Drowsy for extended periods
- Disorientated
- Severely limited attention span
- Losing interest in food and drink
- Too weak to swallow medication
When should clinical hydration/nutrition be stopped?
Continue with clinically assisted hydration if there are signs of clinical benefit. Reduce or stop clinically assisted hydration if there are signs of possible harm to the dying person, such as fluid overload, or if they no longer want it.
What are some possible benefits of withdrawing artificial hydration/nutrition?
▪ Less vomiting and incontinence
▪ Reduction in barriers between patient and family
▪ Prevention of painful venepuncture
In palliative care, what medications should be stopped and which should be continued?
Only continue medication needed for symptom management:
Stop:
o Vitamins/iron
o Hormones
o Anticoagulants
o Antibiotics
o Anticonvulsants used for pain
o Antidepressants
o Cardiovascular drugs
o Think about corticosteroid
Keep:
o Analgesics
o Antiemetics
o Antisecretories
o Anxiolytics
o Type 1 diabetics – keep insulin
o May keep anticonvulsants also
o Give SC if needed
What are syringe drivers?
Syringe drivers are small battery-powered pumps used to deliver medications as a continuous subcutaneous infusion (CSCI) over a 24-hour period.
What are 2 indications for the use of a syringe driver in patients nearing the end of life?
1) Requiring two or more doses of any one of the anticipatory medications in a 24 hour period
2) Being unable to take oral medications that need replacing (e.g. modified release opiates, anti-epileptic medications)
Why can syringe drivers help to achieve better symptom control?
Continuous infusion provides a constant level of medication to the patient
What associated features should you ask about when a patient with cancer presents with pain?
- Cough (productive or not), fever, malaise
- Weakness in legs, sensory changes
- Back pain, bladder/bowel symptoms
- Facial swelling, distended veins in neck/chest, swelling of hands/arms
- Skin changes, reflux symptoms (radiotherapy)
Differentials for chest pain in palliative oncology patient?
Cancer:
- Invasion; bone, pleura, chest wall
- Neuropathic pain
- Bone mets
- SVCO
- MSCC
Cancer related:
- Radiotherapy; skin, oesophagitis
- Chemotherapy; peripheral neuropathy
Co-exsisting:
- Pneumonia
- MI
- PE
- Anxiety
- GORD
- MSK
Most of these can be ruled in/out by taking a thorough pain history.