MH- Common presentations Flashcards

1
Q

What is the key epidemiology of depression (i.e. lifetime prevalence, difference b/w men and women)?

A

~15 -20% population experience over a lifetime
Women have higher prevalence than men (2:1)
Men have higher rates of suicide than women (4:1)

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2
Q

What is the genetic influence in developing depression?

A

Strong genetic predisposition - strong FHx

Multiple genes thought to be implicated - i.e. genes involved with serotonin transporting

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3
Q

What are some key interpersonal predisposing factors to depression?

A

Early childhood - abuse, insecure attachment/lack of affection, poor parenting, maternal depression, parental loss

Adult experiences - lack of confiding relationship, dysfunctional or abusive relationship, lower SES, unemployment, social isolation

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4
Q

What are some factors that may precipitate depression?

A

Environmental factors and stressful life events (esp. loss)

Loss - bereavement, loss of role or autonomy

Ongoing issues with danger, entrapment or humiliation

Social isolation

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5
Q

Outline the principles of 2 behavioural/cognitive theories to the development of depression

A
  1. Seligman’s theory - learned helplessness model of depression - repeated exposures to stressful events - learn that you cannot change it and ‘give up’
  2. Beck’s triad (basis of CBT) - Your view/experiences of self, world and future inform your thoughts - can lead to negative thoughts - depress mood - further cycle of negative thoughts (worthlessness, guilt, helpless, hopeless)
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6
Q

Outline the principles behind the neurochemical theory of depression

A
  • Deficiency of neurotransmitters (serotonin, NA, DA) lead to depression and biological symptoms of depression
  • Decreased levels of their precursors and metabolites found in serum and CSF of depressed people
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7
Q

How is depression diagnosed? What are the core/cardinal symptoms?

A

Clinical diagnosis

Most have at least 2 of the following present for at least 2 weeks

  • Anhedonia (more characteristic)
  • Low/depressed mood
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8
Q

What are some biological symptoms in depression?

A
  • Sleep disturbance - initial insomnia, early waking, hypersomnia
  • Anorexia, wt loss
  • weight gain *
  • Aches/pains, headaches
  • Menstrual disturbance
  • psychomotor retardation
  • decreased libido
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9
Q

What are some psychological/cognitive features of depression?

A
  • Memory loss, slowed thinking, difficulty attention/focusing
  • Anxiety
  • Suicidal ideation
  • Thoughts of helplessness, hopelessness, guilt, shame
  • Nihilism, pesimissm
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10
Q

What are psychotic features of depression?

A

Delusions

  • Usually extension of themes of depression
  • Nihilistic, persecutary, shame/guilt, catastrophic, hypochondrial

Hallucinations

  • Auditory - derogatory voices
  • Rarely visual

Only occur in severe depression

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11
Q

What are DDx for depression?

A
  1. Physical causes - dementia, hypoactive delirium, parkinson’s disease, head injury, cancer, hypothyroidism, diabetes
  2. Normal sadness
  3. Bereavement
  4. Demoralisation
  5. Schizoaffective disorder/schizophrenia, Bipolar disorder
  6. Substance use
  7. Post-natal depression
  8. Adjustment disorder
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12
Q

What are key features to ask on history when someone presents with low mood?

A
  1. HOPC - duration, severity (distress, function), associated biological & psychological symptoms
  2. Question for associated factors - risk factors, precipitating and perpetuating
  3. Risk assessment - self-harm and suicidal ideation
  4. Question to exclude physical causes, bipolar (previous manic episodes) and other psychotic disorders
  5. Question to identify co-morbid psychiatric disorders - anxiety, personality disorder, substance use
  6. Psychiatric history + FHx
  7. Medical and medication hx
  8. Collateral history - dementia, delirium
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13
Q

What examinations would you perform on someone presenting with low mood?

A
  1. Vitals + general health assessment (BMI)
  2. Endocrine - thyroid, cushing’s
  3. Neurological - neurodegenerative disorders, stroke
  4. Inspect for signs of self harm
  5. Signs of malignancy
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14
Q

What investigations would you perform on someone presenting with low mood?

A
  1. Bloods - FBE, LFT, U&E, TFTs, Diabetes screen, Fe studies, B12, folate, Vit D

If indicated - test for cushing’s, addison’s and HIV

  1. Urine drug test if indicated
  2. CT/MRI if cerebral pathology suspected
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15
Q

What is the prognosis of depression?

A

> 50% will have at least one subsequent depressive episode

Each episode generally last ~8-9 months but can be reduced to ~2-3 months with effective treatment

Can resolve spontaneously if untreated/inadequately but last months - years and can become chronic

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16
Q

What are negative symptoms of schizophrenia?

A

Aboulia (lack of motivation/initiation)
Avolition (apathy)
Alogia (poverty of speech/thought, blocking)
Anhedonia (lack of interest/pleasure in things)
Affective flattening (blunting)

17
Q

When is clozapine indicated in Rx of schizophrenia

A

Treatment resistant - failure of at least 2 other antipsychotics (at least one being atypical) that were used at therapeutic doses & adequate time for effect

Treatment of severe tardive dyskinesia on other antipsychotics

18
Q

ASADFACES: Depression

A
Appetite change
Sleep change
Anhedonia
Dysphoria
Fatigue
Agitation/retardation
Concentration (decreased)
Esteem (low)/guilt
Suicidal thoughts
19
Q

DIGFAST: Mania

A
Distractibility
Indiscretion
Grandiosity
Flight of ideas
Activity increase
Sleep deficit
Talkativeness
20
Q

TRAUMA: PTSD

A
Traumatic event
Re-experience
Avoidance
Unable to function
Month or more of symptoms
Arousal increased
21
Q

FINISH: anti-depressant discontinuation syndrome

A
Flu-like symptoms
Insomnia
Nausea
Imbalance
Sensory disturbances
Hyper-arousal (anxiety, agitation)
22
Q

FEVER: NMS

A
Fever
Encephalopathy
Vital sign instability
Elevated WBC/CK
Rigidity
23
Q

HARMED: serotonin syndrome

A
Hyperthermia
Autonomic instability
Rigidity
Myoclonus
Encephalopathy
Diaphoresis
24
Q

IMPULSIVE: borderline personality disorder

A
Impulsive
Moodiness
Paranoia or dissociation under stress
Unstable self-image
Labile intense relationships
Suicidal gestures
Inappropriate anger
Vulnerable to abandonment
Emptiness (feelings of)
25
Q

IWATCHDEATH: delirium causes

A
Infection
Withdrawal
Acute metabolic
Trauma
CNS pathology
Hypoxia
Deficiencies
Endocrinopathies
Acute vascular
Toxins or drugs
Heavy metals