Lorazepam challenging test is done to validate the diagnosis of:

NORCET 6 Prelims -2024

Mental Health Nursing

Easy

Appeared in: NORCET 6 Prelims -2024

Explanation

The Lorazepam challenge test is a primary diagnostic tool for catatonia.
It involves administering a dose of lorazepam (1-2 mg) and observing for a rapid, temporary resolution of catatonic symptoms.
A positive response, often called a 'Lazarus response,' where symptoms like mutism, immobility, and posturing dramatically improve, confirms the diagnosis.
This test helps differentiate catatonia from other conditions with overlapping symptoms.

Option A: The test is not for diagnosing depression itself. While catatonia can be a specifier for major depressive disorder, the test targets the catatonic syndrome specifically.
Option B: Benzodiazepines like lorazepam are generally contraindicated or used with extreme caution in dementia as they can worsen confusion, delirium, and increase the risk of falls.
Option C: Stupor is a symptom (a state of near-unconsciousness or insensibility), not a specific diagnosis. The test is used to determine if the stupor is of a catatonic origin.

Visual 1: Flowchart: 'The Lorazepam Challenge Test'. Steps would include: 1. Assess patient for signs of catatonia (using a scale like BFCRS). 2. Administer 1-2 mg IV lorazepam. 3. Observe for response within 5-15 minutes. 4. Positive response (symptom reduction) -> Confirms catatonia. 5. Negative response (sedation or no change) -> Catatonia not confirmed by this test; consider other diagnoses.

Clinical Relevance

Nursing practice connection: Use the key finding related to Diagnostic procedures for catatonia to guide bedside assessment, documentation, and the next nursing action.
A nurse's primary role during a lorazepam challenge is to administer the medication safely, have emergency resuscitation equipment ready, and meticulously document the patient's baseline symptoms and their response (or lack thereof) to the medication.
Accurate observation is critical, as the rapid improvement confirms the diagnosis and guides further treatment, which may include scheduled benzodiazepines or electroconvulsive therapy (ECT).
What if the patient becomes more agitated after lorazepam? This is a rare paradoxical reaction. The nurse must ensure patient safety, document the adverse response, and notify the physician immediately. This reaction would rule against a typical catatonic response.

How to Approach the Question

First, identify the core of the question: it asks for the specific diagnostic purpose of the 'Lorazepam challenging test'.
Second, analyze the term 'challenge test'. This implies giving a substance to provoke or relieve a specific set of symptoms to confirm a diagnosis.
Third, recall or look up the pharmacological action of lorazepam (a benzodiazepine, which enhances GABA effects) and its known uses in psychiatry.
Fourth, evaluate the options. The test is highly specific. Consider which of the conditions (Depression, Dementia, Stupor, Catatonia) has a known, rapid, and dramatic response to benzodiazepines. Catatonia is famously responsive to GABAergic agents.
Finally, connect the test to the diagnosis. The 'challenge' is to see if lorazepam temporarily 'breaks' the catatonic state, thus confirming the diagnosis of Catatonia.

Concept Tested & Keywords

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