Psychiatry - General Flashcards
(152 cards)
What does “flight of ideas”/”flight of thought” mean?
Racing thoughts which change topic rapidly
What is Bipolar affective disorder (BPAD)?
- Episodes of mania or hypomania and episodes of depressed mood
- Two or more episodes in which the patient’s mood and activity levels are significantly disturbed, this disturbance consisting on some occasions of an elevation of mood and increased energy and activity (hypomania or mania) and on others of a lowering of mood and decreased energy and activity (depression)
- When someone has experienced at least 1 manic/mixed episode (type I) or a hypomanic episode and at least 1 depressive episode (type II)
- Recovery usually complete between episodes
- Repeated episodes of hypomania or mania only are classified as bipolar
What is rapid cycling BPAD?
if the person experiences four or more episodes within 1 year
commoner in women
What is a hypomanic episode?
- Abnormally elevated mood or irritability and related symptoms with decreased or increased function for 4 days or more
- Some interference with personal functioning in daily living
- At least 3 signs must be present
What is a manic episode?
- Abnormally elevated mood or irritability and related symptoms with severe functional impairment or psychotic symptoms for 7 days or more
- Severe interference with personal functioning in daily living
- At least 3 signs must be present/4 if the mood is merely irritable
Difference between hypomania and mania?
• Degree of functional impairment (hospitalisation is a proxy of functional deterioration)
o Hypomania
Duration of symptoms for at least 4 consecutive days
Does not impair functional capacity in social or work setting
Unlikely to require hospitalisation
Does not exhibit any psychotic symptoms
o Mania
Duration of symptoms for at least 1 week
Causes severe functional impairment in social and work settings
May require hospitalisation due to risk of harm to self or others
May present with psychotic symptoms
Type I BPAD vs Type II BPAD vs Cyclothymic disorder
Type I BPAD: one or more manic/mixed episodes, often alternating with depressive episodes
Type II BPAD: one or more hypomanic episodes and at least one depressive episode without manic/mixed episodes
Cyclothymic disorder: persistent mood instability over at least 2 years.
Numerous periods of hypomanic + depressive symptoms present during more of the time than not, causing significant distress and/or functional impairment
What is secondary mania?
Mania due to a secondary cause
• Organic brain damage (esp. R hemisphere) – more common in elderly , delirium, intoxication (amphetamines, cocaine), dementia, frontal lobe damage, cerebral infection (e.g. HIV), myxoedema madness (paradoxical state of hyperactivity seen in extreme hypothyroidism)
• Medication: o L-DOPA, o corticosteroids o Bromocriptine (dopamine agonist) o Amphetamine o Cocaine o Antidepressants increase monoamines and can trigger mania Antidepressants are avoided in people with history of hypomania/mania due to the risk of switching from depression to mania o Glutamate overactivity
- Illicit drugs: stimulant or other street drugs – mania induced if mood state significantly outlasts drugged state, then a dx of bipolar disorder can be made
- Hypothyroidism – picture similar to depression, Hyperthyroidism – picture similar to hypomania or agitated depressed
- Schizoaffective disorder – psychotic + affective symptoms evolve simultaneously
- Emotionally unstable personality disorder – labile mood and impulsivity can mimic mania but will be persistent traits, not episodic symptoms
- Perinatal disorders
- ADHD – ADHD is more persistent and develops earlier (by the age of 6)
Define
Subthreshold depression Mild depression Moderate depression Severe depression Recurrent depressive disorder Complex depression Persistent depressive disorder (dysthymic disorder)
ICD 10
ICD-10 - for a dx of depression to be made at least 2/3 core symptoms (low energy, anhedonia, low mood) must be present for at least 2 weeks
• Subthreshold (minor) depression – 2-4 depressive symptoms, incl. depressed mood or anhedonia >2 weeks in duration
• Mild depression = 2 core symptoms + 2 other symptoms
Symptoms result in only minor functional impairment
ICD10 - 2 or 3
• Moderate depression = 2 core symptoms + 3+ other symptoms
Symptoms of functional impairment between mild and severe (ICD10 – 4 or more symptoms)
• Severe depression = most symptoms.
3 core symptoms + 4+ other symptoms
Symptoms markedly interfere with functioning. Can occur with or without psychotic symptoms
- Severe depression with psychosis = severe depression (as above) and psychotic symptoms (delusions +/- hallucinations)
- Recurrent depressive disorder = when someone experiences at least 2 depressive episodes, separated by several months of wellness
- Complex depression = depression that shows an inadequate response to multiple treatments, is complicated by psychotic symptoms and/or is associated with significant psychiatric comorbidity or psychosocial factors
• Persistent depressive disorder (dysthymic disorder) – 2 years (>1 children/adolescents) of 3 or 4 dysthymic symptoms for more days than not. Dysthymic symptoms are o Depressed mood o Appetite change o Sleep disturbance o Low energy o Low self-esteem o Poor concentration o Hopelessness
How would you explain CBT to a patient?
CBT helps people think about their thoughts, feelings and behaviours + build an alternative set of more realistic beliefs
- Looks at link between thoughts, feelings and behaviours
- Evaluates thoughts to develop newer balanced alternatives
- links mood and activities
- builds in activities that bring a sense of pleasure and achievement/raise their energy levels/develop interests
- formulation - core concept in CBT
Looking for the rational for the patient’s problem - helps recognize and challenge negative automatic thoughts (NATs)
o The unhelpful ideas that pop into the patient’s head and trigger low mood and unhelpful behaviours
o common thinking errors - generalization, minimization - identify and challenge cognitive distortions
o A cognitive distortion is an exaggerated or irrational thought pattern that causes individuals to perceive reality inaccurately and is involved in the onset and perpetuation of psychopathological stated e.g. depression and anxiety - relpase prevention
o keeping away from old thinking and behavioural habits
Explain sleep hygiene to someone
o Bed only for sleep and sex o Routine is essential, even on weekends o Daytime – don’t sleep, exercise, no coffee after lunch o Evenings No alcohol/drugs Avoid heavy meals, nicotine, excess fluids Avoid screens Wind down for an hour before bed Ensure bedroom is quiet and dark
o Nights
If awake after 30 mins, get up and be bored for 20-30 minutes
Then return to bed
Repeat until sleepy
Depression - differential dx
Medications - anti-HTN, steroids, H2 blockers, sedatives, muscle relaxants, retinoids, chemo agents, sex hormones, psych medications
Substance misuse - alcohol, bzd, opiates, marijuana, cocaine, amphetamines
Psychiatric illness - bipolar, dysthmia, anxiety, schizophrenia, personality disorder
Neurological - dementia, PD, tumours, stroke
Endocrine - hyper/hypothyroidism, Addison’s disease, Cushing’s disease, menopause, hyperPTH
Metabolic - hypoglycaemia, hypercalcaemia, porphyria
Others - anaemia, infection (syphillis, lyme, HIV, encephalopathy), sleep apnoea
sadness/bereavment
postpartum depression
burnout
What is “depressive stupor”?
• Depressive stupor: severe depressive illness can deteriorate into a “depressive stupor” where a person is conscious but is non-responsive to any stimulation
RF for serotonin syndrome
o Antidepressant use (esp. higher dose) o Combination antidepressants o Overdose of antidepressants o Lithium o Opiates (tramadol, fentanyl) o Antiemetics (metoclopramide, ondansetron) o Illicit drugs (cocaine, MDMA, LSD) o ECT
What should be done
before
during
after
ECT?
• Before the procedure:
o Routine physical examination for all patients
o Investigations:
Bloods (FBC, U&Es, LFTs, Sickle cell for specific ethnic groups)
ECG – for all pts >50 years of age, <50 if medical indication
CXR – for all pts >55 yrs of age, <55 only if medical hx indicates
o Medication review:
Medications that increase seizure threshold: Benzodiazepines, Mood stabilisers (anticonvulsants)
Medications that reduce seizure threshold: antipsychotics, TCAs, Lithium
o NBM 8h prior to procedure
• During the procedure:
o Do an EEG – make sure that the patient has had a seizure, can’t always see it
o Pharmacological treatment should be used concomitantly to ECT, however its beneficial effects are unlikely to occur fast enough to be life saving.
• After the procedure asses clinical status using a formal valid outcome measure:
o Rating scales e.g. MADRS
o Cognitive tests e.g. MMSE
o Review for side effects and for improvements in their mental state
When should ECT be stopped?
• Stop treatment:
o When remission has been achieved
If a persons depression has responded to a course of ECT, antidepressant medication should be started or continued to prevent relapse
Consider lithium augmentation of antidepressants
o Sooner if side effects outweigh the potential benefits
How often should cognitive function be monitored during treatment with ECT?
• Assess cognitive function before the first ECT treatment + monitor at least ever 3-4 treatments + at the end of a course of treatment:
o Orientation and time reorientation after each treatment
o Measures of new learning, retrograde amnesia, subjective memory impairment carried out at least 24h after a treatment
Give advantages and disadvantages of unilateral vs bilateral ECT
Bilateral \+ more effective effective at threshold more efficacious quicker
-
may cause more cognitive impairment
may cause language problems or visuospatial orientation problems
unilateral - placed on the non-dominant side of the brain
+
fewer cognitive side effects
- technically difficult not as effective not effective at threshold slower action higher stimulus dose associated with greater efficacy but increased cognitive impairment compared with a lower stimulus dose
How often is ECT given and how many sessions are required?
- ECT usually given twice a week
* Number of sessions undertaken during a course of ECT ranges from 6-12
Main indications for ECT
- Used in current UK clinical practice as a treatment option for individuals with depressive illness, catatonia and mania
- Occasionally used to treat schizophrenia
• Severe depressive illness that is life-threatening
o Only if there is a life-threatening situation i.e. poor oral intake, acutely suicidal, if treatment resistant depression
o Antidepressants, psychotherapy, counselling
• Catatonia
o Syndrome associated with both schizophrenia and affective disorders
o Characterized by marked changes in muscle tone or activity that may alternate between the extremes of catatonic stupor (deficit of movement) and catatonic excitement (excessive movement)
o Benzodiazepines, psychotropic agents
• Prolonged or severe manic episodes
o Elated, euphoric or irritable mood and increased energy. The term may refer to a mental disorder or to a mood state or symptom
o Mania is associated with bipolar disorders
o In severe manic episodes individuals are psychotic require continual supervision to prevent physical harm to themselves or others
o Antipsychotics, lithium, anticonvulsants
• [[Schizophrenia (NICE: the current state of evidence does not allow the general use of ECT in the management of schizophrenia to be recommended) however it is occasionally used to treat schizophrenia but schizophrenia is not an indication for ECT]]
o Characterized by a broad range of cognitive, emotional and behavioural problems in general classified into positive and negative symptoms
o Individuals with delusions or hallucinations are described as psychotic
o Antipsychotics, clinical, emotional, social support
Contraindications to ECT
• Technically no absolute contraindications
• Caution in higher risk patients (concerns particularly about the anaesthetic)
o Heart disease/stroke
o Raised ICP
o Risk of cerebral bleeding (HTN, stroke)
o Pacemaker, pregnant woman, epilepsy
Complications of ECT
• Risks associated with anaesthetic
o MI, arrythmias, aspiration pneumonia, prolonged apnoea, malignant hyperthermia, broken teeth, death
o Mortality associated w ECT not higher than that associated with the administration of GA during a minor surgery
• Risks of ECT
o Common complaints (80%) – confusion, muscle pain, headache, nausea
o Effect on cognition (10%)– retorgrade and anterogrde memory loss (events immediately before and after ECT) – most patients will fully recover at 6 months
• Retrograde amnesia (Short-term or long-term memory impairment for past events) and anterograde amnesia (current events)
o Very rare to have long-term complications
o Short term side effects – headache, nausea, short-term memory impairment, memory loss of events prior to ECT, cardiac arrhythmia
o Long-term side-effects – impaired memory
• ECT administration affects the CNS + causes changes in cardiovascular dynamics dictates the need for special caution in those individuals who are at increased risk of cardiovascular event
• Other immediate potential complications (incidence: 1 per 1300-1400 treatments)
o Status epilepticus
o Laryngospasm
o Peripheral nerve palsy
Which classes of medications are RF for depression?
Which might be protective?
B-blockers corticosteroids oral contraceptives statins ranitidine antihypertensives
There is some evidence that inflammation is relevant to the pathogenesis of depression, therefore anti-inflammatory drugs are being trialled as depression treatments.
DSM-V definition of schizophrenia
Criterion A
• >2 or more of the following
• For a significant portion of time during a 1 month period (or less if successfully treated)
• At least one of these must be delusions, hallucinations or disorganized speech (active phase symptoms)
o Hallucinations
o Delusions
o Disorganised speech
o Negative symptoms
o Grossly disorganised or catatonic behaviour
Criterion B
• For a significant portion of the time since the onset of the disturbance, level of functioning in at last 1 major area e.g. work, interpersonal relations, selfcare is markedly below the levels achieved prior to onset
Criterion C
• Duration
o Continuous signs of the disturbance persist for at least 6 months with at least 1 month of active-phase symptoms (or less if successfully treated)
o May include periods of prodromal or residual symptoms during which;
disturbance may be manifested by only negative symptoms
or >2 active-phase symptoms present in an attenuated form (e.g., odd beliefs, unusual perceptual experiences)
Criterion D
• schizoaffective disorder + depressive disorder or BPAD with psychotic features have been ruled out because
o No major depressive or manic episodes have occurred concurrently with the active phase symptoms or
o If mood episodes have occurred during active phase symptoms they have been present for a minority of the total duration of the active and residual periods of the illness
Criterion E
• The disturbance is not attributable to the physiological effects of a substance or another medical condition
Criterion F
• If there is a hx of ASD or communication disorder of childhood onset, the additional dx of schizophrenia is made only if prominent delusions or hallucinations in addition to the other required x of schizophrenia are also present for at least 1 month (or less if successfully treated)