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PUID: 64 || PLAB 2 Mock 2 :: PsychMiscOwn6: OCD (2nd Attempt)

Key Points


Understanding OCD

  • OCD is characterized by:

    • Obsessions: unwanted, intrusive, repetitive thoughts

    • Compulsions: repetitive behaviours performed to reduce anxiety

  • Common examples:

    • Fear of contamination

    • Excessive hand washing

    • Repeated checking behaviours (doors, taps, locks)

  • Symptoms are distressing and can interfere with:

    • Work

    • Studies

    • Relationships

    • Sleep

    • Concentration



Important History to Explore


Presenting Complaint

  • Open with:

    • “Can you tell me more about what has been happening?”

  • Explore:

    • Nature of intrusive thoughts

    • Triggers

    • Frequency

    • Severity

    • Duration

    • Progression over time


Obsessions

  • Fear of germs or contamination

  • Repeated unwanted thoughts

  • Distressing mental images

  • Attempts to resist thoughts


Compulsions

  • Hand washing rituals

  • Repetitive checking

  • Counting or arranging behaviours

  • Time spent performing rituals

  • Anxiety if rituals are resisted


Functional Impact

Assess effects on:

  • Work/studies

  • Daily activities

  • Social life

  • Sleep

  • Concentration


Risk Assessment

Always screen for:

  • Depression

  • Anxiety

  • Self-harm thoughts

  • Suicidal ideation


Psychiatric History

  • Previous psychiatric illness

  • Previous OCD diagnosis

  • Past therapy or medications

  • Family psychiatric history


Medical & Social History

  • Current medications

  • Alcohol/substance use

  • Excess caffeine intake

  • Sleep patterns

  • Appetite changes


Trigger Identification

Important examiner point:

  • Identify factors worsening symptoms:

    • Stress

    • High-pressure work environments

    • Stimulants (especially caffeine)



Important Considerations

  • OCD thoughts are not voluntarily produced

  • Patients usually recognize thoughts as irrational

  • Avoid saying:

    • “The thoughts will stop”

  • Better explanation:

    • “You will learn how to control and manage these thoughts”


High-Yield Communication Point

Keep explanations:

  • Simple

  • Short

  • Layperson-friendly

  • Structured

Avoid overcomplicated explanations during PLAB 2 stations.



Diagnostic Approach


Step-by-Step Assessment


1. Build Rapport

  • Confirm patient name and age

  • Use empathetic introduction


2. Explore Symptoms

  • Nature of intrusive thoughts

  • Compulsions performed

  • Trigger factors


3. Quantify Symptoms

  • Frequency

  • Duration

  • Severity

  • Time consumed daily


4. Assess Insight

  • Does the patient recognize thoughts as unreasonable?

  • Can they resist compulsions?


5. Assess Functional Impairment

  • Occupational

  • Social

  • Psychological


6. Screen for Comorbidities

  • Anxiety

  • Depression

  • Substance misuse


7. Perform Risk Assessment

  • Self-harm

  • Suicide risk


8. Consider Differential Diagnoses

  • Generalized anxiety disorder

  • Depression with rumination

  • Psychosis

  • Obsessive compulsive personality disorder



Management


Explanation of OCD

Simple PLAB-friendly explanation:

“OCD is a mental health condition where a person experiences unwanted repetitive thoughts and feels compelled to perform certain actions to reduce anxiety.”

Key explanation structure:

  • Obsession = intrusive thought

  • Compulsion = repetitive behaviour


Reassurance

  • OCD is common

  • OCD is treatable

  • Many people improve significantly with treatment

Important empathy cue:If patient says:

  • “I feel like I’m going crazy”

Respond with:

  • “I’m sorry you’re feeling this way.”

  • “This condition is more common than many people realize.”



Psychological Treatment


Cognitive Behavioural Therapy (CBT)

Especially:

  • Exposure and Response Prevention (ERP)

Explain:

  • Thoughts may continue

  • Patient learns strategies to manage reactions


Behavioural Goal Example

  • Delay hand washing for 1–2 minutes initially

  • Gradual reduction of compulsions

  • Avoid sudden stopping to prevent worsening anxiety


Medication


SSRIs

Consider if:

  • Moderate to severe symptoms

  • Poor response to therapy

  • Patient preference

Explain:

  • Takes 4–6 weeks to work

  • Possible side effects

  • Importance of follow-up review

Examples:

  • Fluoxetine

  • Sertraline



Lifestyle Advice

  • Reduce caffeine intake

  • Improve sleep hygiene

  • Regular exercise

  • Structured daily routine

  • Stress management



Safety Netting

Advise patient to seek urgent help if:

  • Symptoms worsen significantly

  • Severe distress develops

  • Suicidal thoughts occur



Communication Skills


High-Yield PLAB 2 Communication Tips


Use Empathy Naturally

Avoid robotic stock phrases.

Good examples:

  • “I’m sorry you’re going through this.”

  • “That sounds very distressing.”


Avoid Overexplaining

The examiner emphasized:

  • Candidates often know the concept

  • But lose time using lengthy explanations

Keep:

  • Clear

  • Concise

  • Relevant



Signposting

Useful phrases:

  • “I’d like to ask a few questions about your mood.”

  • “Now I’ll ask about how this affects daily life.”


Avoid These Common Mistakes

  • Rehearsed empathy

  • Excessive reassurance

  • Overuse of:

    • “Is that okay?”

    • “Bear with me”

  • Using jargon

These reduce marks for rapport and interpersonal skills.



Ethical Considerations

  • Maintain confidentiality

  • Respect patient autonomy

  • Obtain consent before discussing management

  • Use understandable language

  • Encourage shared decision-making

These principles align with GMC Good Medical Practice guidance on communication, partnership, and patient-centred care.



Examiner & Performance Insights


Major Examiner Expectations

  • Focused questioning

  • Logical consultation structure

  • Relevant psychiatric assessment

  • Good time management

  • Natural empathy

  • Clear explanations

  • Functional assessment

  • Risk assessment


Common Reasons Candidates Lose Marks

  • Disorganized consultation

  • Poor time management

  • Missing risk assessment

  • Using stock phrases

  • Long explanations

  • Failure to explore triggers

  • Weak interpersonal skills

These are commonly highlighted in GMC feedback domains.



Additional Resources

  • GMC Good Medical Practice Guidance

  • PLAB 2 Examiner Top Tips

  • NICE Guidelines for OCD

  • CBT and ERP management principles

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