Psychiatry Flashcards
What disorder of medically unexplained symptoms includes:
multiple physical SYMPTOMS present for at least 2 years
patient refuses to accept reassurance or negative test results.
Somatisation disorder.
Symptoms - somatisation.
Eg back pain, headaches that have no organic explanation. However when the tests all come back negative their belief remains.
What disorder of medically unexplained symptoms includes:
persistent belief in the presence of an underlying serious DISEASE, e.g. cancer
patient refuses to accept reassurance or negative test results
Hypochondriacal disorder.
Disease - hypochonDriacal
What disorder of medically unexplained symptoms includes:
Loss of sensory or motor function
Not consciously invented
Conversion disorder
What disorder of medically unexplained symptoms includes:
Conscious inventing of symptoms
For MATERIAL gain
Malingering
What disorder of medically unexplained symptoms includes:
Conscious inventing of symptoms
For PSYCHOLOGICAL gain
Factitious disorder
(Munchausen’s)
Assuming the sick role provides an internal reward
In hypochondriacal disorder and somatisation disorder, what form do the thoughts take?
Overvalued ideas.
Not delusions or obsessions
What is the differential for low mood and medically unexplained symptoms? How would you differentiate them?
Depression
Somatisation disorder
Treat the low mood and see if somatic symptoms resolve. If so it was depression.
What questions should you specifically ask a patient with medically unexplained symptoms?
- Check it is an overvalued idea and not an obsession. (Do they agree it is irrational)
Do you find it hard to trust doctors if they tell you there is nothing physically wrong?
How do you feel about the idea of a psychological cause for your problems? - Check it is not a delusion
The xray came back negative - do you think it is possible there is no physical cause for your symptoms?
What is the difference between an overvalued idea, a delusion and an obsession?
Overvalued idea - egosyntonic (patient doesn’t think it is irrational)
Obsession - egodystonic (patient acknowledges irrational)
Delusion - Implausible and unshakeable.
What are Schneider’s first rank symptoms of schizophrenia?
Highly suggestive of diagnosis except 20% never have them and 10% bipolar do.
Third person auditory hallucinations Thought echo (hear own thoughts)
Delusional perceptions (real things have special meaning) Thought withdrawal/broadcast/insertion (thoughts interfered with) Passivity (someone else controlling you)
Describe the dopamine hypothesis of schizophrenia.
Increased dopamine in the mesolimbic dopaminergic pathway.
What are the functions of each of the dopaminergic pathways in the brain?
Mesolimbic - reward
Mesocortical - cognitive control of behaviour/restraint
Nigrostriatal - motor control - think parkinsons
Tuberoinfundibular - pathway between hypothalamus and pituitary in prolactin axis.
Give some risk factors for schizophrenia.
Bio - dopamine, FHx
Psycho - family high expressed emotion
Social - persistent cannabis use, migration
Give some factors which improve prognosis for schizophrenia.
Bio - Female, Late onset, Acute onset, adherence
Psycho - Sociable premorbid personality, intelligent, no negative symptoms
Social - No substance misuse, social support
Give some symptoms of schizophrenia other than delusions an hallucinations.
Negative symptoms - blunted affect, social withdrawal, poverty of speech etc
Neologisms - made up words
Catatonia
What questions should you ask a patient with psychosis?
Disclaimer - I need to ask you a few questions that may seem a little strange but they are routine and they should help me understand a bit better what has been going on.
Delusions:
Schizoid
1. Do you have any enemies? Do you feel anyone is out to get you?
2. Are your thoughts ever interfered with? Put in/removed?
3. Are you being controlled by anyone else?
Bipolar
4. Do you have any particular talents?
5. Are you religious? What is your relationship with God like?
6. Try to shake delusion.
Hallucinations:
- Do you hear people talking that other people can’t hear?
- Do you ever see things that other people can’t?
What diagnoses are associated with visual hallucinations?
NOT usually schizophrenia
Delirium Dementia Epilepsy Alcohol withdrawal Drugs - especially LSD
What diagnosis is associated with olfactory hallucinations?
Temporal lobe lesion/epilepsy
How is capacity assessed?
- For what decision?
- Do they understand information?
- Do they retain the information long enough to make a decision?
- Do they weigh and balance the information?
- Can they communicate their decision to you?
If no, is the impairment temporary? If so, can the decision wait until capacity returns.
What should be done about a decision if the patient does not have capacity?
Best interests decision, taking into account views of either a nearest relative or IMCA.
Does a sectioned patient have capacity?
Depends on what decision.
They might have the capacity to decide what to eat fro lunch but perhaps not to refuse medication.
What is a section 2?
28 days for assessment and treatment
Requires 2 drs (1 section 12 approved) and an AMHP
What is a section 3?
6 months for treatment
Requires 2 drs (1 section 12 approved) and an AMHP
What is a CTO?
Patient who has been on section 3 or 37
Treatment enforced in the community
What is a section 5(2)?
72 hours
Dr sections from inpatient (not a and e)
What is a section 5(4)?
6 hours
RMN sections from inpatient (not a and e)
What is a section 135?
Police section from home (with magistrate’s warrant) and take to place of safety
What is a section 136?
Police section from public and take to place of safety
What is a section 35/36?
Remand to hospital before sentencing
What is a section 37?
Hospital instead of prison straight from court.
Psychiatrist discretion when to discharge.
What is a section 37/41?
Hospital instead of prison straight from court.
Home office must allow discharge/ approve section 17
What are the indications for ECT?
Refractory depression
Uncontrolled mania
Catatonia
What are the contraindications for ECT?
Increased intracranial pressure
Recent stroke or MI
Crescendo angina
What are the risks associated with ECT?
Acute cognitive impairment - retrograde and anterograde amnesia
Dysrhythmias eg WPW
Anaesthetic associated risks - malignant hyperthermia, anaphylaxis, nausea and vomiting
What EEG trace would you expect to see in a good ECT treatment?
- High frequency low amplitude
- Increasing amplitude and lower frequency
- Flat line post ictal phase
What are the symptoms of malignant hyperthermia?
Pyrexia
Muscle rigidity
What drugs can cause malignant hyperthermia?
Suxamethonium (in ECT anaesthesia)
Antipsychotics (neuroleptic malignant syndrome)
Halothane
What is the aetiology of malignant hyperthermia?
Excessive release of Ca2+ from the sarcoplasmic reticulum of skeletal muscle
associated with defects in a gene on chromosome 19 encoding the ryanodine receptor.
Which SSRI is particularly appropriate for adolescents?
Fluoxetine
Which SSRI is particularly appropriate post MI?
Sertraline
Which SSRI is particularly appropriate when breastfeeding or pregnant?
Paroxetine
Which psychiatric drugs are associated with long QT?
Haloperidol
Citalopram
What are the side effects of SSRIs?
GI Anxiety Mania Suicidal ideation Sexual dysfunction Hyponatraemia (in the elderly)
Serotonin syndrome
What are the symptoms of serotonin syndrome?
Myoclonic jerks - distinguishing feature Hyperthermia Hyperreflexia Rigidity Delirium
What drugs can cause serotonin syndrome?
MAOIs
SSRIs
Ecstasy
Amphetamines
Which drugs might interact with SSRIs?
- Bleeding risk:
Anticoagulants
NSAIDs - add a PPI - Triptans
What is the halflife of fluoxetine? Why is this significant?
Long 1-3 days
No need to taper off
Avoid in pregnancy/ breastfeeding
Leave a week before switching to a different SSRI
What happens if you stop an SSRI abruptly? What is the exception to this rule?
Discontinuation symptoms:
Mood decreases Restless/insomnia Dizziness Parasthesia Diarrhoea
Except fluoxetine
What is the mechanism of action of venlafaxine?
Low dose - SSRI
High dose - SNRI
What are the side effects of venlafaxine?
SSRI related
Plus NA related - hypertension, dry mouth
Which receptor do TCAs act on?
Tricyclic antidepressants
Block alpha 1, Ach, NA