A nurse should monitor intake and output during oxytocin administration, because the drug \ \ \ \ \ \ ? - Daman & Diu Staff Nurse - 2018

Daman & Diu Staff Nurse - 2018

Obstetrics and Midwifery Nursing

Hard

Appeared in: Daman & Diu Staff Nurse - 2018

Explanation

Oxytocin has an antidiuretic effect because its chemical structure is very similar to that of vasopressin, also known as Antidiuretic Hormone (ADH).
When administered in high concentrations or for a prolonged time, oxytocin can activate vasopressin receptors in the kidneys.
This activation causes the kidneys to reabsorb excess free water, leading to decreased urine output and overall fluid retention.
This excessive fluid retention can result in a dangerous condition called water intoxication, which is characterized by dilutional hyponatremia (low blood sodium levels).
Therefore, monitoring a patient's fluid intake and urine output is a critical safety measure to detect this complication early.

Option A: Oxytocin is not directly nephrotoxic; it does not cause structural damage to the kidney cells. Its effect is functional, related to water reabsorption.
Option C: Increased thirst (polydipsia) is a classic symptom of dehydration or conditions like diabetes insipidus where the body is losing too much water. Oxytocin causes the body to retain water.
Option D: This is the direct opposite of oxytocin's effect on the kidneys. Oxytocin is an antidiuretic, meaning it decreases urine production.

Clinical Relevance

Nursing practice connection: Knowing Pharmacological side effects of oxytocin and related nursing responsibilities helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses must always administer oxytocin via an infusion pump for precise dose control, which helps minimize the risk of both uterine hyperstimulation and water intoxication.
Early signs of water intoxication include headache, nausea, vomiting, drowsiness, and confusion. The nurse must immediately report these symptoms and any significant drop in urine output to the provider.
What if? If the patient has a pre-existing condition like preeclampsia, heart disease, or renal impairment, the risk of fluid overload from oxytocin's antidiuretic effect is significantly higher. These patients require even more vigilant fluid balance monitoring.

How to Approach the Question

First, identify the core of the question: it asks for the reason ('because') behind a specific nursing action (monitoring I&O) for a specific drug (oxytocin).
Second, recall the primary and secondary pharmacological effects of oxytocin. Its primary effect is stimulating uterine contractions.
Third, think about its secondary effects. Oxytocin is structurally similar to another key hormone. Identify that hormone (ADH/vasopressin) and its function (water retention).
Fourth, connect this secondary antidiuretic effect to the nursing action. The ADH-like effect causes the body to retain water, which can be dangerous.
Finally, evaluate the options. 'Causes water intoxication' is the most severe and direct consequence of this antidiuretic effect, making it the correct rationale for monitoring fluid balance. The other options are either incorrect (diuretic effect) or not the primary reason for this specific intervention.

Concept Tested & Keywords

Concept Tested: Pharmacological side effects of oxytocin and related nursing responsibilities.
Stem keywords: oxytocin administration, intake and output, monitor
Lead-in keywords: because
Negative lead-in flag: false

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