Bipolar - Yr 4 Flashcards
4th year - bipolar epidemiology, prevalence, cause, treatment, investigations and management
define bipolar 1
bipolar 1 disorder is defined as one or more manic or mixed (signs of mania and depression) episodes.
Bipolar 2
bipolar 2 is defined as a depressive episode with at least one episode of hypomania (this is shorter lived than mania and is not accompanied by psychotic symptoms). Hypomania is noticeably abnormal but does not result in functional impairment or hospitalisation.
Bipolar III
Bipolar III disorder describes depressive episodes with hypomania occurring only when taking an antidepressant
What is the main characteristic of manic episodes
manic episodes:
- elated mood (persistent, out of context, can be extreme, ecstatic or euphoric.
- increased energy / activity
- increased speech
- expansive ideas ( start new projects, grandiose ideas acted upon, disinhibition, impulsive and risky behaviour, spending money)
- Psychotic symptoms (delusions, hallucinations, grandiose delusions - may believe they have superhuman powers, important, wealthy etc., auditory hallucinations unusual - but in 2nd person.)
- cognitive state (impaired attention and concentration)
What is the lifetime risk of bipolar?
lifetime risk of bipolar is less than 1%
what is the male to female ratio of bipolar?
female 1.5 : male 1
A patient undergoing a manic episode of Bipolar may show symptoms of increased speech - describe how this may present
- pressure of speech
- increased rate
- increased volume
- associated flight of ideas
- puns and rhymes may be used to connect thoughts.
A patient undergoing a manic episode of bipolar may show signs of expansive ideas - describe how this may present.
- patients feel energetic, optimistic with good ideas.
- many projects may be started but unfinished
- poor judgement
- grandiose ideas acted upon with disastrous consequences.
- impulsive/risky behaviour e.g. increased/irresponsible money spending.
- disinhibited behaviour e.g. stripping in public.
What psychotic symptoms may be present in a patient who is having a manic episode of bipolar disorder?
- delusions (mood congruent so if irritable then may have persecutory delusions, if elated then grandiose delusions)
- hallucinations
- grandiose delusions (believe they have superhuman powers, are very important etc.)
- Auditory hallucinations are uncommon but are usually in 2nd person and reflect the mood and grandiosity.
What cognitive state may a patient with manic bipolar disorder have?
attention and concentration are impaired
What are the physical symptoms of a manic episode of bipolar?
- reduced sleep
- high activity day and night
- increased appetite (however do not gain weight due to high activity)
- *some patients may experience weightloss because they are too active to prepare food,
- increased sex drive (sexual disinhibition and promiscuity)
What are the predisposing and precitipating factors for bipolar disorder?
Predisposing:
- family history
Precipitating:
- severe stresses or significant life events.
- (increased risk of manic events in postpartum period)
what is the average age of onset for bipolar disorder?
20 yrs
What are some biological causes of mania?
Biological:
- cerebral neoplasms, infarcts, tumour, infection .
- cushing’s disease
- huntington’s disease
- hyperthyroidism
- multiple sclerosis
- renal failure
- SLE
- temporal lobe epilepsy
- B12 and niacin deficiency
What substances can be the cause of a manic episode?
- amfetamines
- anticholinergics
- antidepressants
- antiviral drug
- antimalarials
- captopril (ACE inhibitor)
- cimetidine (H2 receptor antagonist)
-Cocaine - Corticosteroids
- Hallucinogens
- ## Levodopa