UPUMS Nsg officer-2023
Medical & Surgical Nursing
Hard
Diagnostic criteria for the syndrome of inappropriate anti-diuretic hormone secretion includes all of the following EXCEPT?
Appeared in: UPUMS Nsg officer-2023
Explanation
- The question requires identifying the finding that is NOT a diagnostic criterion for SIADH.
- In SIADH, there is an excessive release of antidiuretic hormone (ADH), which causes the kidneys to retain free water.
- This water retention leads to a small volume of highly concentrated urine, which means the urine osmolality is INCREASED (high), not decreased.
- Therefore, 'Decreased urine osmolality' is the incorrect statement about SIADH and the correct answer to this 'EXCEPT' question.
Why Other Options Were Wrong
- Option A: This is a key diagnostic criterion for SIADH. The retention of free water dilutes the blood, leading to a decrease in the concentration of solutes, hence decreased serum osmolality.
- Option B: This is a characteristic finding in SIADH. Despite low sodium in the blood (hyponatremia), the body attempts to excrete sodium in the urine to compensate for the expanded fluid volume.
- Option C: This is the hallmark finding of SIADH. The excess water retained in the body dilutes the serum sodium concentration, leading to dilutional hyponatremia.
Related Visual
Clinical Relevance
- Nursing practice connection: Knowing Diagnostic criteria for Syndrome of Inappropriate Antidiuretic Hormone (SIADH) helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
- A primary nursing responsibility for a patient with SIADH is implementing and monitoring fluid restriction, which is often the cornerstone of treatment.
- Nurses must conduct frequent neurological assessments, as hyponatremia can lead to cerebral edema, causing confusion, headaches, and potentially life-threatening seizures. Seizure precautions should be initiated.
- What if? If a patient presented with polyuria (high urine output), hypernatremia (high serum sodium), and low urine osmolality, the diagnosis would likely be Diabetes Insipidus (DI), the opposite of SIADH. Treatment would involve fluid replacement and administering synthetic ADH (desmopressin), not fluid restriction.
How to Approach the Question
- First, identify the negative keyword 'EXCEPT'. This signals that you must find the one option that is FALSE or does not fit with the condition described.
- Recall the core pathophysiology of SIADH. A helpful mnemonic is 'Soaked Inside': the body holds onto too much water due to inappropriate, high levels of ADH.
- Think through the consequences of holding onto water: the blood becomes dilute, and the urine becomes concentrated.
- Evaluate each option based on this logic: Dilute blood means 'Decreased serum osmolality' and 'Hyponatraemia' (both are true). Concentrated urine means 'Increased urine osmolality' (making 'Decreased urine osmolality' false). 'High urine sodium' is also true as the body tries to excrete sodium to manage the fluid overload.
- Select the option that contradicts the pathophysiology. 'Decreased urine osmolality' implies dilute urine, which is the opposite of what occurs in SIADH.
Concept Tested & Keywords
- Concept Tested: Diagnostic criteria for Syndrome of Inappropriate Antidiuretic Hormone (SIADH)
- Stem keywords: syndrome of inappropriate anti-diuretic hormone secretion, diagnostic criteria
- Lead-in keywords: EXCEPT
- Negative lead-in flag: Question is negatively framed using 'EXCEPT'.
Question ID
QV_J_jG-iEqROuSfLWQdQ4
Reference Book
E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 57-59
E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 1178-1180
Practise the full UPUMS Nsg officer-2023
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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