Psych Flashcards
Depression ICD-10
Must last at least 2 weeks and represent a change from normal
Must not be secondary to other causes, i.e. drugs, alcohol misuses, medication etc
Core sx:
- low mood
- anhedonia
- anergia
Other sx:
- sleep disturbance
- diminished appetite
- reduced concentration and attention
- reduced self-esteem/sel-confidence
- ideas of guilt and worthlessness
- bleak and pessimistic views of future
- ideas or acts of self harm/suicide
Psychotic sx in depression
Delusions
- mood congruent, nihilistic
- overbearing guilt for misdeeds, responsible for world events
- deserving of punishment
Hallucinations
- 2nd person auditory most common
- olfactory bad smells, rotting flesh
- visual, demons, dead bodies
Severity of depression levels
Mild: 2 core sx + 2 other sx
Moderate: 2 core sx + 3+ other sx
Severe: 3 core sx + 4+ other sx
Severe w/ psychosis: severe depression + psychotic sx (delusions +/- hallucinations)
Tx of mild-to-moderate depression
Consider watchful waiting, assessing again normally within 2 weeks
Consider offering one or more low-intensity psychosocial interventions
- CBT (self-guided, computerised)
- Relaxation therapy
- Brief psychological interventions (brief CBT, counselling, 6-8 sessions)
ANTI-DEPRESSANTS NOT RECOMMENDED**
Tx of moderate-to-severe depression
Check if at risk
- urgent psych referral if pt has active suicide ideas/plans or putting themselves or others at immediate risk
Offer anti-depressant medication COMBINED with high-intensity psychological treatment (CBT or IPT; 1:1)
ECT
Factors necessitating admission
Self neglect Risk of suicide/self harm Risk to others Poor social support Psychotic sx Lack on insight Tx resistant depression
Dysthmia
Presence of chronic low grade depressive sx (usually long-standing)
Always slightly depressed, it’s become their baseline
Mild sx of depression that lasts a long time, 2:1 F:M, 25% suffer chronic sx
Postnatal depression
10-15% women within 1-6 months post partum
Peak incidence is 3-4 weeks post-partum
Seasonal affective disorder
Low mood w change in season
Lack of sunlight -> lack of pineal gland melatonin synthesis -> lack of serotonin
Light therapy + anti-depressant tx
Bipolar affective disorder ICD-10
Pt must experience ‘at least two episodes one of which must be hypomanic/manic or mixed, with recovery usually complete between the episodes’
Depressive episode same as unipolar depression
Criteria for hypomanic/manic episodes being the same as unipolar hypomania/mania
**Mixed affective episodes is when there is occurrence of both hypomanic/manic and depressive sx in single episode present everyday for at least 2 weeks
(almost a retrospective diagnosis)
BPAD epidemiology
BPAD 1 - 1%, mean onset 18.2
BPAD 2 - 1.1%, mean onset 20
Suicide rate is x15-18 higher than general population
10% pts who begin with depressive episode go onto develop episode of mania within 10 years
- genetic disposition
- greater incidence in upper social classes
- no differences in sexes/ethnicities
Manic episode ICD-10
Mood
- predominately elevated, expansive, irritable, definitely abnormal for individual
- mood must be prominent and sustained for at least 1 week (unless severe enough for hospital admission)
At least 3 of following signs must be present (4 is only irritable), leading to severe interference w personal functioning in daily living:
- increased activity/physical restlessness
- increased talkativeness (pressured speech)
- flight of ideas or subjective experience of thoughts racing
- loss of normal social inhibitions
- decreased need for sleep
- inflated self-esteem/grandiosity
- distractibility/constant changes in plans
- recklessness behaviour (spending sprees, foolish enterprises, reckless driving)
- marked sexual energy/sexual indiscretions
Psychotic sx of mania
Delusions
- grandiose (religious figure, special powers)
- persecutory (suspicion develops)
Incomprehensible speech
- pressured speech
Self neglect
Cationic behaviour
- manic stupor
Hypomanic episode ICD-10
Mood elevated or irritable to a degree abnormal for inidividual and sustained for at least 4 consecutive days
Same 3 signs as manic episode need to be bresent
Mania vs hypomania
Degree of functional impairment: hospitalisation is proxy of functional deterioration
DSM: duration criteria of 4 days for hypomania and 7 days for mania in DSM is arbitrary; follow-up studies show most hypomanic episodes in BPAD 2 lasts for less than 4 days
Beck’s Cognitive Triad
Self - Future - Worth
Worthless guilt - Helplessness - Hopelessness
=> Informs CBT
Cotard syndrome
Rare subtype of nihilistic delusions
Pt believes they or part of them is dead or does not exist
Seen most commonly in severe depression, but is also associated with schizophrenia
SSRI action
Selective serotonin reuptake inhibitors
fluoxetine, setraline
Side effect: headache, GI (nausea, diarrhoea/constipation), sleep disturbance/vivid dreams, sexual dysfunction
TCA action
5-HT and NA re-uptake inhibition; affects multiple transmitters though (also anti-cholinergic/muscarinic effect - very dirty x )
- prescribed when pts don’t respond to first-line
- Amitryptyline, clomipramine, lofepramine*
Just as effective as SSRIs if not for side effect profile; lethal in over dose
MAOI action
Increase availability of 5-HT and NA in synapse
- irreversible old ones: phenelzine, tranylcypromine, isocarboxazid*
- reversible: moclobemide*
SSRI consultation
- what do you need to tell the pt?
‘blocks the serotonin pumps’
Common side effects
Drug cx: hyponatraemia, GI bleeding
Serotonin syndrome: psych sx, neuro sx including myoclonus and autonomic sx
Discontinuation syndrome (short half-life): flu-like illness, trouble sleeping, shocks, anxiety
Suicidality: potential association (small evidence in adolescence), general pragmatic view warn all pts potential to feel suicidal
Duration: same dose for 6-12 months min. when in remission and 2 years for those at greater risk of relapse
Review: 2 weekly initially and then regularly thereafter
MAOI problem
Tyramine interaction (cheese effect)
- pts need special low tyramine diet
- avoid cheese, cured meat, fermented pickles, red wine, soybeans etc
Tyramine amine derivative of tyrosine AA, has sympathomimetic effect (release of A from adrenal glands)
Hypertensive episode!!!
- tachycardic, flushing, severe throbbing headache, pallor, stroke, death, renal failure
Mirtazepine action
NaSSA; blocks presynaptic alpha-2 adrenergic receptors
Autoreceptor hence less feedback and more NA release
Side effects: drowsiness, increased appetite, weight gain
**used a lot in old age pysch
Venlafaxine/duloxetine action
SNRI; similar to SSRI incl. side effect profile
Pts require monitoring of BP