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Difficulty: MediumAnxiety, OCD, and Trauma-Related Disorders

A 29-year-old woman presents to the outpatient psychiatry clinic accompanied by her husband, 4 weeks after delivering a healthy full-term infant. She reports severe, exhausting anxiety and highly distressing, recurrent images of accidentally drowning her baby while giving him a bath. She is horrified by these images, recognizes them as irrational, and states, 'I would never hurt my child, but my brain keeps flashing this terrible picture.' Consequently, she refuses to bathe the baby and frequently checks the crib to ensure the baby is breathing, sometimes up to 20 times an hour.

Her psychiatric history is notable for a hospitalization at age 20 during which she experienced a 3-week period of decreased need for sleep, rapid pressured speech, and grandiose spending. She was diagnosed with a mood disorder at that time but discontinued all medications five years ago. Currently, she exhibits no signs of elevated mood, hallucinations, or delusions. She is exclusively breastfeeding.

Which of the following is the most appropriate next step in management?

  1. A
    Begin treatment with fluoxetine monotherapy
  2. B
    Notify child protective services immediately regarding an imminent threat of child abuse
  3. Refer the patient for cognitive-behavioral therapy incorporating exposure and response preventionAnswer
  4. D
    Diagnose brief psychotic disorder and begin treatment with an antipsychotic
  5. E
    Mandate involuntary psychiatric hospitalization to ensure the safety of the infant

Answer

The most appropriate next step is to refer the patient for cognitive-behavioral therapy incorporating exposure and response prevention.
The patient's clinical presentation—intrusive, distressing images of harming her infant combined with checking and avoidance behaviors—is classic for postpartum Obsessive-Compulsive Disorder (OCD). Because she has full insight and her thoughts are ego-dystonic, she does not have postpartum psychosis. First-line treatments for OCD include serotonergic antidepressants and cognitive-behavioral therapy featuring exposure and response prevention (ERP). However, her history of a manic episode (hospitalization for decreased sleep, rapid speech, and grandiosity) indicates underlying Bipolar I Disorder. In such patients, administering an SSRI without a mood stabilizer carries a high risk of inducing a manic switch. Therefore, ERP is the most appropriate next step, as it provides definitive treatment for the OCD while avoiding pharmacologic risks to both the mother (manic switch) and the breastfed infant.

Step-by-Step Solution

1
Identify the primary psychiatric presentation.
The patient has highly distressing, intrusive thoughts of harming her infant, coupled with compulsive checking and avoidance behaviors. She retains insight and is horrified by the thoughts.
These symptoms are characteristic of ego-dystonic obsessions and compulsions, confirming a diagnosis of Obsessive-Compulsive Disorder (OCD) with postpartum onset.
2
Differentiate the presentation from postpartum psychosis and assess safety.
Unlike postpartum psychosis, the patient's reality testing is intact. She has no intent to harm the infant and takes protective measures. She does not pose an imminent danger.
This rules out the need for involuntary hospitalization, breaking confidentiality to call child protective services, or prescribing antipsychotics for a primary psychotic disorder.
3
Evaluate the patient's past psychiatric history.
The patient had a previous 3-week episode of decreased sleep, rapid speech, and grandiosity requiring hospitalization.
This meets the criteria for a manic episode, establishing a diagnosis of Bipolar I Disorder.
4
Determine the safest and most effective management strategy.
While SSRIs are typically first-line for OCD, monotherapy in a patient with Bipolar I Disorder risks inducing a manic switch. Cognitive-behavioral therapy (specifically exposure and response prevention) is highly effective.
Psychotherapy avoids the risks of pharmacologic mood destabilization and prevents medication exposure to the nursing infant.

Key Concept

Management of postpartum Obsessive-Compulsive Disorder (OCD) in patients with a history of Bipolar Disorder
Estimated Time:1m 30s
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Topics

Anxiety, OCD, and Trauma-Related Disorders

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