Thursday, October 20, 2022

cmecde 564

 Clinical Skills for OSCEs

102 Station 38 Speech assessment

Conditions most likely to come up in a speech assessment station

Dsyphasia:

Expressive dysphasia results from damage to Broca’s area in the left inferior frontal gyrus:

– ‘telegraphic’ speech with omission of unimportant words such as ‘to’ and ‘the’

– difficulty finding words

– inaccurate grammar and syntax

Receptive dysphasia results from damage to Wernicke’s area in the left superior posterior

temporal gyrus:

– inability to understand language and follow commands

– speech sounds fluent with normal rhythm but content is meaningless

Global dysphasia results from widespread damage to the language areas, for example, owing

to a middle cerebral artery infarct in the dominant (usually left) hemisphere:

– both expression and comprehension of language are impaired, making communication

very challenging

Nominal dysphasia results from damage to the parietal lobe:

– difficulty naming objects

– still able to describe what the object does

Conductive dysphasia results from damage to the arcuate fasciculus:

– isolated difficulty in repeating words and phrases

– language and speech are otherwise intact

Dysarthria:

Pseudobulbar palsy or spastic dysarthria results from bilateral lesions of the upper motor

neurons in the corticobulbar tracts:

– increased tone of oropharyngeal muscles

– harsh-sounding ‘Donald Duck’ speech

Ataxic dysarthria results from lesions of the cerebellum:

– dysmetric ‘scanning’ speech

– slurred speech (the patient may sound drunk)

Hypo- or hyper-kinetic dysarthria results from lesions of the basal ganglia:

– slow, monotonous speech in Parkinson’s disease

– loud and erratically stressed speech in Huntington’s disease

Bulbar palsy or flaccid dysarthria results from lesions of the lower motor neurons in the

medulla and cranial nerves:

– hypernasal speech owing to decreased tone of the oropharyngeal muscles

– hoarse ‘breathy’ voice owing to paralysis of the vocal cords

Dysphonia:

Dysphonia is a hoarse voice resulting from vocal cord pathology:

– neurological causes include vagus nerve lesions leading to vocal paresis, and

neuromuscular disease, such as myasthenia gravis, leading to vocal fatigue

– non-neurological causes include laryngitis, vocal cord nodules, corticosteroid inhalation,

laryngeal cancer, and vocal straining

Dyslexia, dyscalculia, dysgraphia:

These symptoms result from lesions in the dominant parietal lobe.


103Psychiatry

Station 39

General psychiatric history

Specifications: The instructions for this station are likely to ask you to focus on one part of the history.

Family, social, and personal history are particularly relevant to psychiatry.

In taking a psychiatric history, it is especially important to put the patient at ease and to

be seen to be sensitive, tactful, and empathetic.

Before starting

Introduce yourself to the patient.

Confirm his name and date of birth.

Ensure that he is comfortable.

The history

Name, age, and mode of referral.

Presenting symptoms and history of presenting symptoms

Start with open questions and listen attentively without interrupting:

– “Can you tell me why you came to the hospital today?”

– “How have you been feeling lately?”

For each symptom identified, cover:

– onset and duration

– course

– effect on everyday life

– exacerbating and relieving factors, including any treatments

Ask screening questions about mood, abnormal beliefs, and abnormal perceptions (see

Station 40: Mental state examination).

Try to form a diagnostic hypothesis and to validate or falsify it through further questioning.

Past psychiatric history

Previous episodes of mental illness.

Previous psychiatric admissions, formal (under a section) and informal.

Previous physical and psychological treatments and their outcomes.

History of self-harm and attempted suicide.

Past medical history

Current illness:

– acute illness

– chronic illness

– vascular risk factors

Past and childhood illnesses, including head injury.

Past hospital admissions and surgery.


Clinical Skills for OSCEs

104 Station 39 General psychiatric history

Drug history

Current psychological treatments.

Prescribed medication.

Recent changes in prescribed medication.

Over-the-counter drugs and herbal remedies.

Allergies.

Substance use

Alcohol.

Tobacco.

Illicit drugs.

[Note] Further questioning to establish dependence may be required if alcohol use and/or illicit drug use is high (see

Station 45: Alcohol history).

Family history

Determine if anyone in the family has suffered from psychiatric illness or attempted suicide, e.g.

“Has anyone in the family ever had a nervous breakdown?”

Enquire about family structure and relationships:

– “Do you have a partner or spouse?” If ‘yes’, ask about their age, occupation, and health

– “Do you have any children?” If ‘yes’, ask about their age, health, where they live, and who is

caring for them

– “Have there been any recent events or changes in the family?”

Social history

Ask about social support and care:

– “Who lives with you at home?”

– “Who else are you close to?”

– “Do you feel like you have enough support?”

Determine adequacy of housing and finances:

– “Do you live in your own house?”

– “Are you getting any help with your housing?”

– “Do you have any money worries?”

Map out activities and interests:

– “How do you spend a typical day?”

– “What sorts of things do you enjoy doing?”

Personal history

Early life:

– “Are you aware of any problems when you were a baby?”

– “How would you describe your childhood?”

– “Were both your parents around when you were growing up?”

Educational achievement:

– “How did you get on at school?”

– “What qualifications did you leave with?”

Occupational history:

– “Tell me about your work.”

– “What jobs have you had in the past?”

– “Why did you leave each job?”


Psychiatry

Station 39 General psychiatric history 105

Forensic history:

– “Have you ever had any trouble with the police or the law?”

– “Have you ever been convicted of any offence?”

– “Have you spent time in prison?”

– “How did that go?”

Psychosexual history:

– “I’m going to ask you some sensitive questions which we ask everyone. Do you have any problems

in your love or sex life?”

– “Have you ever experienced violence or abuse from your partner or anyone else?”

Religious or spiritual orientation:

– “Is religion or spirituality important to you?”

After taking the history

Ask the patient if there is anything he might add that you have forgotten to ask about.

Indicate that you could check the patient’s psychiatric records (if any) and take an informant/

collateral history, for example, from a relative, friend, carer, police officer, GP, or other healthcare professional.

Summarise your findings and offer a differential diagnosis.

Thank the patient.

Common conditions most likely to come up in a general psychiatric history station

Depressive disorder.

Anxiety disorder, e.g. agoraphobia, social phobia, panic disorder, generalised anxiety disorder.

Mixed depression–anxiety.

Obsessive–compulsive disorder.

Eating disorder.

Mania and bipolar affective disorder.

Schizophrenia and other delusional disorders.

NB. For descriptions of these conditions, see Table 18 at the end of Station 40.


Clinical Skills for OSCEs

106 Station 40

Mental state examination

Specifications: The MSE is roughly analogous to the physical examination, and provides a snapshot

of the patient’s mental state at that moment in time. Instructions for this station are likely to ask you to

focus on one part of the mental state examination only, or to omit cognitive assessment. In some places,

the patient–actor might by replaced by a real patient on a video recording.

Before starting

Introduce yourself to the patient.

Confirm his name and date of birth.

Explain that you would like to explore his thoughts and feelings, and ask him if this is OK.

Assessing the mental state

The mental state can be assessed under 7 main headings:

1. Appearance and behaviour.

2. Speech.

3. Mood.

4. Abnormal thoughts.

5. Abnormal perceptions.

6. Cognition.

7. Insight.

Appearance and behaviour

Begin by asking the patient some open questions, and focusing your attention on his appearance and

behaviour.

Level of consciousness.

Appearance: body build, posture, general physical condition, grooming and hygiene, dress,

physical stigmata such as scars, piercings, and tattoos.

Behaviour and attitude to the examiner. In particular note: facial expression, degree of eye

contact, and quality of rapport.

Motor activity/disorders of movement, e.g. agitation, retardation, tremor, dystonias, mannerisms.

Speech

Note:

Amount, rate, volume, and tone of speech, e.g. logorrhoea (large amount of speech), pressure

of speech (increased rate of speech), poverty of speech (small amount of speech), speech retardation (decreased rate of speech), mutism (no speech).

Form of speech, e.g. circumstantiality, tangentiality, clang associations, puns, rhymes, neologisms, perseverations. In circumstantiality, speech is organised and goal-oriented but cramped

by excessive or irrelevant detail and parenthetical remarks. In tangentiality, speech is organised

but not goal-oriented in that it is only very indirectly related to the questions being asked.


Psychiatry

Station 40 Mental state examination 107

Mood

Note or ask about:

Current mood state and severity. If there is the suggestion of depression, ask the patient to rate

his mood on a scale of 1 to 10, with 1 being the worst that he has ever felt and 10 being normal.

Biological symptoms: sleep, appetite, libido, energy.

Ideas of harm to self, e.g. “People with problems similar to those that you have been describing

often feel that life is no longer worth living. Have you felt that life is no longer worth living?” If yes,

then this should be explored further: “Have you ever thought of killing yourself?” “Have you made

any plans?” “Would you carry out those plans?” “What stops/would stop you?”.

Ideas of harm to others.

Anxiety and anxiety symptoms, e.g. butterflies, giddiness, clamminess, palpitations, difficulty

catching breath. If there is the suggestion of an anxiety disorder, this should be explored

further.

You are likely to fail this station if you do not ask about ideas of harm in an at-risk patient.

Abnormal thoughts

Note or ask about:

Stream of thought, e.g. pressure of thought, poverty of thought, thought blocking.

Form of thought, e.g. flight of ideas, loosening of associations, over-inclusive thinking.

Content of thought:

– preoccupations, ruminations, obsessions, and compulsive acts, e.g. for obsessions, “Do certain things keep coming into your mind even though you try hard to keep them out?” And for

compulsive acts, “Do you ever find yourself spending a lot of time doing the same thing over and

over again even though you’ve already done it well enough?”

– phobias, e.g. “Do you have any special fears, like some people are afraid of spiders or snakes?”

– delusions and overvalued ideas. For obvious reasons, you cannot easily ask directly about

delusions. Begin by an introductory statement and general questions, such as “I would like to

ask you some questions that might seem a little bit strange. These are questions that we ask to

everyone who comes to see us. Is that all right with you? Do you have any ideas that your friends

and family do not share?” Explore any delusions and in particular ask about their onset, their

effect on the patient’s life, and the patient’s explanation for them (degree of insight). If

necessary, ask specifically about common delusional themes, e.g. delusions of persecution,

reference, control, guilt, grandeur

Abnormal perceptions

Ask about:

Illusions and hallucinations. Again, begin by an introductory statement and general questions,

such as “I gather that you have been under quite some pressure recently. When people are under

pressure they sometimes find that their imagination plays tricks on them. Have you had any such experiences? Have you seen things which other people cannot see? Have you heard things which other

people cannot hear?” Ask about all five modalities and explore any positive findings for content,

onset, frequency, duration, and effect on the patient’s life. Exclude pseudohallucinations and

hypnogogic and hypnopompic hallucinations. For auditory hallucinations of voices, determine

if there is more than one voice, and if the voices talk to the patient (second person) or about him

(third person). If the voices talk to him, do they command him to do dangerous things and, importantly, is he likely to act on these commands? If the voices talk about him, do they comment

on his every thought and action (running commentary)? Other forms of auditory hallucinations

are écho de la pensée and gedankenlautwerden, both first rank symptoms of schizophrenia.


Clinical Skills for OSCEs

108 Station 40 Mental state examination

Differentiating between true hallucinations and pseudo-hallucinations

A pseudo-hallucination may differ from a true hallucination in that:

it is perceived to arise from the mind (inner space) rather than the sense organs (outer space).

it is less vivid.

it is less distressing.

the patient may have some degree of control over it.

True hallucinations tend to be a feature of functional disorders, whereas pseudo-hallucinations tend

to be a feature of personality disorder. This is, however, not a hard and fast rule.

Depersonalisation and derealisation, e.g. for depersonalisation “Have you ever felt unreal?” And

for derealisation, “Have you ever felt that things around you are unreal?”

Cognition

Generally speaking, a quick and informal cognitive assessment can be carried out by recording the

following:

Orientation in time, place, and person.

Attention and concentration, e.g. serial sevens test, spelling ‘world’ backwards. Record the time

taken and the number of errors.

Memory:

– short-term memory: ask the patient to name and remember three objects, then carry out the

serial sevens test, then ask him to recall the three objects

– recent memory: ask him how he came to the clinic this morning/afternoon

– remote memory: ask him where he was born, where he grew up, etc.

Grasp: ask the patient to name the prime minister and reigning monarch.

If cognitive impairment is suspected, you can carry out the Mini-Mental State Examination (MMSE) or, freely

available, the Montreal Cognitive Assessment (MoCA). Both the MMSE and MoCA are scored out of 30.

[Note] The result is invalid if the patient is delirious or has an affective disorder, or is simply not co-operating!

Insight

To determine degree of insight, ask the patient:

“Do you think there is anything wrong with you?”

If no,

“Why did you come to hospital?”

If yes,

“What do you think is wrong with you?”

“What do you think the cause of it is?”

“Do you think you need treatment?”

“What are you hoping treatment will do for you?”

After the mental state examination

Thank the patient.

Ensure that he is comfortable.

Summarise your findings. Note that mood should be reported as subjective mood and objective mood. Do not omit to comment upon risk.

Offer a differential diagnosis.


Psychiatry

Station 40 Mental state examination 109

Table 18. Principal features of key psychiatric disorders

See ICD-10 or DSM-IV for detailed diagnostic criteria.

Depressive disorder See Station 43

Mania •  Garish clothing, accessories, and makeup

•  Hyperactive, flirtatious, hypervigilant, assertive, and/or aggressive

behaviour

•  Pressured speech; abnormalities of the form of speech

•  Euphoric or irritable or labile mood

•  Grandiose thoughts with flight of ideas and loosening of

associations; mood congruent delusions

•  Hallucinations

•  Poor concentration

•  Poor insight

Schizophrenia • Delusions

• Hallucinations

• Disorganised speech

• Disorganised or catatonic behaviour

• Negative symptoms

Agoraphobia Persistent irrational fear of places difficult or embarrassing to escape

from, such as places that are confined, crowded, or far from home.

Increased reliance on trusted companions for accompaniment or, in

severe cases, restriction to the home.

Social phobia Persistent irrational fear of being scrutinised by others and of being

embarrassed or humiliated, either in most social situations or in specific

social situations such as public speaking.

Specific phobia Persistent irrational fear of one or more objects or situations. Common

specific phobias include heights, darkness, enclosed spaces, storms,

animals, flying, driving, blood, injections, and dental and medical

procedures.

Panic disorder Panic attacks are characterised by rapid onset of severe anxiety lasting

for about 20–30 minutes. They may occur in the phobic anxiety

disorder listed above or in other disorders such as OCD, PTSD, and

organic disorders.

In panic disorder, panic attacks occur recurrently and unexpectedly.

There is fear of the implications and consequences of an attack, e.g.

having a heart attack, losing control, ‘going crazy’. Anticipatory fear

of panic attacks develops and may itself lead to further panic attacks

and to significant behavioural changes such as the development of

agoraphobia.

continued


Clinical Skills for OSCEs

110 Station 40 Mental state examination

Table 18. Principal features of key psychiatric disorders – continued

Generalised anxiety

disorder (GAD)

Long-standing free-floating anxiety that may fluctuate but that is

neither situational (phobic anxiety disorders) nor episodic (panic

disorder). There is apprehension about a number of events far out

of proportion to the actual likelihood or impact of the feared events.

Other common symptoms include symptoms of autonomic arousal,

irritability, poor concentration, muscle tension, tiredness, and sleep

disturbances.

Obsessive compulsive

disorder (OCD)

An obsessional thought is a recurrent idea, image, or impulse that is

perceived as being senseless, that is unsuccessfully resisted, and that

results in marked anxiety and distress.

A compulsive act is a recurrent stereotyped behaviour that is not

useful or enjoyable but that reduces anxiety and distress. It is

usually perceived as being senseless and is unsuccessfully resisted.

A compulsive act may be a response to an obsessive thought or

according to rules that must be applied rigidly.

Post-traumatic stress

disorder (PTSD)

A protracted and sometimes delayed response to a highly threatening

or catastrophic experience characterised by numbing, detachment,

flashbacks, nightmares, partial or complete amnesia for the event,

avoidance of (and distress at) reminders of the event, and prominent

anxiety symptoms. Associated psychiatric disorders are very common,

especially depressive disorders, anxiety disorders, and alcohol and

substance misuse.

Adjustment disorder A protracted response to a significant life change or life event

characterised by depressive symptoms and/or anxiety symptoms that

are not severe enough to meet a diagnosis of depressive disorder or

anxiety disorder, but that nevertheless lead to an impairment of social

functioning.

Somatisation disorder

(Briquet’s syndrome)

A long history of multiple and severe physical symptoms that cannot

be accounted for by a physical disorder or other psychiatric disorder.

Compare to factitious disorders such as Münchausen syndrome and to

malingering.

Hypochondriacal disorder

(hypochondriasis)

A fear or belief of having a serious physical disorder despite medical

reassurance to the contrary.

Eating disorders See Station 46.

Alcohol dependence See Station 45.


111Psychiatry

Station 41

Cognitive testing

Testing of higher cerebral function begins by the bedside, opening the door to more formal

neuropsychological assessments.

Introduce yourself to the patient.

Make sure that the conditions are optimised, e.g. you are in a quiet room, the patient is neither

sedated nor suffering from side-effects, he is wearing his glasses or hearing aid.

Explain the procedure: “I would like to ask you a few questions to test your memory and concentration. It should take about five or ten minutes in all. Is that OK?”

Check orientation in time and place. “What day of the week is it today?” “What’s the date?” “What

town are we in?” “What building are we in?” If the patient is disoriented, give him the correct

information.

If the patient is disoriented in time and place, check orientation in person.

Test insight. “People seem quite concerned about you. Why is that?” “Why are you here?”

Dominant hemisphere

[Note] The dominant cerebral hemisphere is usually, although not always, the one on the left.

Note the patient’s use of language. In the presence of an impaired ability to communicate

(dysphasia), fluency suggests receptive or Wernicke’s dysphasia, whereas hesitancy suggests

expressive or Broca’s dysphasia (see Station 38: Speech assessment).

If receptive dysphasia is a possibility, test ability to understand commands, e.g. “Raise both

arms.” “Touch your left ear with your right thumb.”

You can also test for nominal aphasia, a common form of expressive dysphasia, by asking the

patient to name some common objects such as a watch, pen, or penny coin; then to name the

components of some of these objects, e.g. hour hand, winder, strap.

Having ascertained that the patient is literate, test for dyslexia by asking him to read a couple

of sentences, and for dysgraphia by asking him to write a sentence.

Test for dyscalculia with ‘serial sevens’, e.g. “What’s 100 minus 7? What’s 93 minus 7? Can you

keep on going?”

Test ability to recognise objects (agnosia) by, for example, placing a pen, paper, and name

badge on a table and asking the patient to pick up the pen.

In summary, assess the dominant hemisphere by testing for receptive dysphasia, expressive and

nominal dysphasia, dyslexia, dysgraphia, dyscalculia, and agnosia.

Non-dominant hemisphere

Test for:

Geographical agnosia, e.g. “Show me how you would go to the bathroom and return to your bed.”

Dressing apraxia, e.g. “Can you please button up your cardigan?”

Constructional apraxia, e.g. “Can you draw a clock for me?”


Clinical Skills for OSCEs

112 Station 41 Cognitive testing

Memory

The following memory tests may be of use in an alert patient who is neither confused nor dysphasic.

Immediate memory (digit span): “Can you repeat after me, 5438879?”

Recent memory: “Can you tell me how long you’ve been in hospital?”

Remote memory: “Where did you live 10 years ago?” “Who was the last Prime Minister?”

Verbal memory: “I would like you to repeat the following sentence, ‘The quick brown fox jumps

over the lazy dog.’ Now, I would like you to remember that sentence, because I’m going to ask you

to repeat it again in 15 minutes’ time.”

Visual memory: “I have placed a few objects on the table. I’m going to ask you to name these objects in 15 minutes’ time, so please could you remember them?”

[Note] You also ought to be aware of retrograde amnesia, which is memory loss for events up to an insult; and posttraumatic amnesia, which is memory loss for events after an insult.


113Psychiatry

Station 42

Dementia diagnosis

According to ICD-10, dementia is: “a syndrome due to disease of the brain, usually of a chronic or

progressive nature, in which there is disturbance of multiple higher cortical functions, including

memory, thinking, orientation, comprehension, calculation, learning capacity, language, and

judgement. Consciousness is not clouded… Dementia produces an appreciable decline in intellectual

functioning, and usually some interference with personal activities of daily living…”.

The more important risk factors for dementia are listed in Table 19.

Table 19: Risk factors for dementia

Advanced age

Mild cognitive impairment (MCI)

Family history

Genetic mutations

Cerebrovascular disease

Hyperlipidaemia

Head injury

The primary requirement for diagnosis, again according to ICD-10, is “evidence of a decline in both

memory and thinking sufficient to impair personal activities of daily living… The impairment of memory

typically affects the registration, storage, and retrieval of new information, but previously learned and

familiar material may also be lost, particularly in later stages. Dementia is more than dysmnesia: there

is also impairment of thinking and reasoning capacity, and a reduction in the flow of ideas”.

The diagnosis of the type of dementia (e.g. Alzheimer’s disease versus vascular dementia or mixed

dementia) is made on clinical grounds, and, strictly speaking, can only be verified by brain biopsy at

post-mortem. In some cases, owing to the progressive nature of disease, an observation time of 6–12

months may be required to make a diagnosis. The order in which symptoms develop can be suggestive

as to the type of dementia involved.

In the first instance, the patient is usually seen by their GP, who attempts to rule out other causes for

cognitive impairment and conducts a basic dementia screen. This includes a bedside standardised test

such as the Mini-Mental State Examination (MMSE), the General Practitioner Assessment of Cognition

(GPCOG), or the Montreal Cognitive Assessment (MoCA), the latter being particularly useful if the

patient is in the early stages of disease. At this (normally) early stage, the physical examination is

usually unremarkable. However, it may reveal an underlying reversible cause, or complications such as

malnutrition, burns, or falls.

Routine blood tests and investigations include:

FBC and serum vit-B12 and folate to rule out anaemia.

Metabolic panel to exclude dyshomeostasis of electrolytes and glucose.

Serum TSH to exclude hyper- or hypothyroidism.

Serum lipids.

Urine dipstick to exclude UTI (if delirium is a possibility).

CT or MRI scan to exclude reversible causes such as tumour, subdural haematoma, and hydrocephalus, and to ascertain structural changes such as hippocampal atrophy in Alzheimer’s disease.

[Note] Further investigations should be ordered on a case-by-case basis and might include HIV

testing; syphilis serology; vasculitic, autoimmune, neoplastic, and toxicological screens;

copper studies; cerebrospinal fluid examination; and genetic testing. Brain biopsy itself

is rarely indicated.


Clinical Skills for OSCEs

114 Station 42 Dementia diagnosis

The diagnosis of dementia subtypes is made on the basis of disparate sets of diagnostic criteria,

including DSM-IV for Alzheimer’s disease, the NINDS-AIREN criteria for vascular dementia, the

International Consensus Consortium Criteria for dementia with Lewy bodies, and the Lund–Manchester

criteria for fronto-temporal dementia. Detailed neurocognitive testing by a clinical psychologist can be

helpful in identifying cognitive impairments and in confirming a diagnosis.

Common types of dementia

Clinical features vary not only according to the severity of the dementia, but also according to the

type, with different types affecting different parts of the brain. They include (in approximate order

of progression for Alzheimer’s disease) memory loss, impaired thinking, language impairments,

deterioration in personal functioning, disturbed personality and behaviour, perceptual abnormalities,

and motor impairments.

Alzheimer’s disease Insidiously progressive memory loss and personality changes. Other

spheres of cognitive and non-cognitive impairment are added over the

course of several years.

Dementia with Lewy

bodies

A recently recognised entity that overlaps with Alzheimer’s

disease and parkinsonian dementias. It is the second commonest

cause of dementia, and is characterised by marked fluctuations in

cognitive impairment and alertness, vivid visual hallucinations, early

parkinsonism, and frequent falls.

Vascular dementia Classically marked by an abrupt onset and step-wise progression.

Clinical features are variable and depend on the location of infarcts,

but mood and behavioural changes are common. Significantly,

comorbidity leads to a shorter survival than in Alzheimer’s disease.

Pick’s disease A frontotemporal dementia characterised by early and prominent

personality changes and behavioural disturbances, eating

disturbances, mood changes, cognitive impairment, language

impairment, and motor signs. Onset is in middle-age and loss of

memory may not be a prominent feature.

Principles of management

If the dementia cannot be reversed, the aim of management is to improve quality of life of both patient

and carers. This involves treating symptoms and complications of dementia, addressing functional

problems, and providing education and support to carers. Anticholinesterase inhibitors such as

donepezil, rivastigmine, galantamine, and tacrine act by increasing cholinergic neurotransmission

and can modestly and temporarily ameliorate cognitive performance and behavioural problems in

some patients with Alzheimer’s disease and dementia with Lewy bodies. Owing to their serious and

debilitating side-effects, antipsychotic drugs should only ever be used as a last resort, and, even then,

mostly on a time-limited basis.


Psychiatry

Station 42 Dementia diagnosis 115

Examiner’s questions

Principal differential diagnosis of dementia

Mild cognitive impairment (MCI).

Delirium (including delirium superimposed upon dementia).

Depressive disorder (‘pseudodementia’) – although note that depressive and anxiety disorders

affect about 50% of dementia sufferers.

Late-onset schizophrenia (paraphrenia).

Learning difficulties.

Amnestic syndrome e.g. Wernicke–Korsakoff syndrome.

Substance misuse.

Iatrogenic causes, particularly drugs.

Dissociative disorder.

Factitious disorder.

Malingering.


Clinical Skills for OSCEs

116 Station 43

Depression history

For this station, it is especially important to put the patient at ease and to be sensitive,

tactful, and empathetic.

Before starting

Introduce yourself to the patient.

Confirm his name and date of birth.

Explain that you are going to ask him some questions about his feelings, and obtain consent.

Ensure that he is comfortable.

The interview

Ask open questions about the patient’s current mood, listening attentively and gently encouraging him to open up.

Ask about the onset of illness, and about its triggers and causes.

Ensure that you ask about:

The core features of depression:

– depressed mood

– loss of interest

– fatiguability

Other common features of depression:

– poor concentration

– poor self-esteem and self-confidence

– guilt

– pessimism/hopelessness

The somatic (i.e. biological) features of depression:

– sleep disturbance

– early morning waking

– morning depression

– loss of appetite and/or weight loss

– loss of libido

– anhedonia

– agitation and/or retardation

Screen for possible anxiety, hallucinations, delusions, and mania, so as to exclude other possible

psychiatric diagnoses.

Take brief past medical, drug, family, and social histories. Remember that drugs and alcohol are

commonly associated with depression.

Assess the severity of the illness and its effect on the patient’s life.

Ask about suicidal ideation and potential risk to any dependants, or you may fail this

station.


Psychiatry

Station 43 Depression history 117

Asking about suicidal ideation

Asking about suicide can feel uncomfortable for some. Use a formulation such as, “People with

problems similar to those that you have been describing often feel that life is no longer worth living. Have

you felt that life is no longer worth living?” If yes, then this should be explored further: “Have you ever

thought of killing yourself?” “Have you made any plans?” “Do you have the means to carry out those

plans?” “Would you carry out those plans?” “What stops/would stop you?”

After finishing

Ask the patient whether he has any questions, and whether there is anything that you have

forgotten to ask about.

Thank the patient.

Summarise your findings and suggest a further course of action, for example, further assessment of suicidal risk (see Station 44), collateral history, follow-up by the Community Mental

Health Team, intensive support from the Crisis Team, admission to a psychiatric unit.


Clinical Skills for OSCEs

118 Station 44

Suicide risk assessment

And so it was I entered the broken world

To trace the visionary company of love, its voice

An instant in the wind (I know not whither hurled)

But not for long to hold each desperate choice.

From Broken Tower, by Hart Crane (b. 1899; d. 1932, by suicide)

Before starting

Introduce yourself to the patient.

Confirm his name and date of birth.

Explain that you are going to ask him some difficult questions about his thoughts, and ask if

this is OK.

Do not hesitate to ask about suicide for fear of planting the idea into the patient’s head.

There is nothing to suggest that asking about suicide increases its risk.

The assessment

Ask about:

The history of the current episode of self-harm (if any) to determine degree of suicidal intent

(higher intent/lower intent – guidelines only):

– what was the precipitant for the attempt? (serious precipitant/trivial precipitant)

– was it planned? (planned/unplanned)

– what was the method of self-harm, and did he expect this to be lethal? (violent method/

non-violent method)

– did he make a will or leave a suicide note? (suicide note/no suicide note)

– was he alone? (alone/not alone)

– did he take any precautions against discovery? (precautions/no precautions)

– was he intoxicated?

– did he seek help after the attempt? (sought help/did not seek help)

– how did he feel when help arrived? (angry or disappointed/relieved)

Assess risk factors for suicide:

– previous suicide attempt(s)

– recent life crisis

– male sex, especially if between the ages of 25 and 44

– divorced, widowed, or single

– unemployed or in certain occupations, e.g. medicine, farming

– poor level of social support

– physical illness

– psychiatric illness

– substance misuse

– family history of depression, substance misuse, or suicide

Mental state: assess current mood and exclude psychosis.

Will he be returning to the same situation? What has changed? Are there any important protective factors?

Ask about current suicidal ideation. Has he made any plans?


Psychiatry

Station 44 Suicide risk assessment 119

After the assessment

Thank the patient.

Summarise your findings and state your opinion of the patient’s suicide risk.

Suggest a plan of action, e.g. review by a senior colleague, formal psychiatric assessment, referral to the crisis team, admission to hospital.


Clinical Skills for OSCEs

120 Station 45

Alcohol history

Before starting

Introduce yourself to the patient.

Confirm his name and date of birth.

Establish rapport.

Explain to the patient that you would like to ask him some questions to evaluate his drinking

habits, and ask if that is OK; as he may be reluctant, it is particularly important that you be gentle

and tactful.

Screening for an alcohol problem

Use the CAGE questionnaire to screen for an alcohol problem. A positive response to one or more of

the four questions ought to trigger further questioning.

“Have you ever felt that you should Cut down on your drinking?”

“Have people Annoyed you by criticising your drinking?”

“Have you ever felt Guilty about your drinking?”

”Have you ever had a drink first thing in the morning (Eye opener) to steady your nerves or get rid

of a hangover?”

The alcohol history

Ask about:

Alcohol intake:

– what type or types

– how much (try to quantify in units of alcohol; see Figure 29)

– where

– when

– with whom

Onset and duration of alcohol problem, e.g. “How old were you when you first started drinking?“

“When do you think it got out of hand?” “Have you ever tried going dry?” “How did that go?”

Features of alcohol dependence:

1. compulsion to drink/craving

2. primacy of drinking over other activities

3. stereotyped pattern of drinking, e.g. narrowing of drinking repertoire

4. increased tolerance to alcohol, i.e. needing more and more to produce same effect

5. withdrawal symptoms, e.g. anxiety, sweating, tremor (‘the shakes’), nausea, fits, delirium

tremens

6. relief drinking to avoid withdrawal symptoms, e.g. ‘eye opener’ first thing in the morning

7. reinstatement after abstinence

[Note] For a diagnosis of alcohol dependence to be made, ICD-10 requires at least three from a similar list of features

occurring at any time during a 12-month period.


Psychiatry

Station 45 Alcohol history 121

Medical history

Ask about the psychological and physical complications of alcohol abuse:

Psychological: depression, anxiety

Neurological: peripheral neuropathy, Wernicke–Korsakoff syndrome

Gastrointestinal: peptic ulceration, oesophageal varices, pancreatitis, cirrhosis

Cardiovascular: ischaemic heart disease, MI, stroke

Drug history

Ask about prescription and illicit drug use. Co-morbid abuse of illicit substances is common in

alcoholics, as is abuse of certain prescription drugs such as benzodiazepines. Moreover, alcohol

interacts with many prescription drugs including NSAIDs, antiepileptics, antidepressants, antibiotics,

and warfarin.

Family and social history

Ask about:

Alcohol abuse in other members of the family.

The effect of alcohol abuse on relationships, particularly with the partner and children (if need

be, carry out a risk assessment).

The effect of alcohol abuse on employment, finances, and housing.

Whether the patient has come into any trouble with the police or law.

After finishing

Give the patient feedback on his drinking habits (e.g. number of units drunk versus recommended number of units) and, if appropriate, suggest ways for him to cut down his alcohol use.

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