Most newborns pass urine by one of the following time periods?

Appeared in: IGNOU Post B. SC. Nursing entrance-2019

Explanation

The vast majority of healthy, full-term newborns are expected to pass their first urine within 24 hours of birth.
This milestone is a key indicator of adequate hydration and proper kidney and urinary tract function.
While many infants void much earlier, the 24-hour mark serves as a critical clinical checkpoint for nurses to assess for potential problems, as failure to void may suggest a congenital defect or other issues.

Option A: This timeframe is too short to be the standard clinical expectation. Although many newborns void this early, it is not the established cutoff for identifying a potential issue.
Option B: Similar to the 10-hour option, this is not the standard clinical milestone. A healthy newborn may not have voided by this time without it indicating a problem.
Option D: This is also less than the 24-hour standard. Using this as a cutoff could lead to unnecessary investigations for healthy newborns who are simply on the longer end of the normal range.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Normal physiological functions of a newborn, specifically the timing of the first void as background academic context rather than a clinical decision trigger.
Nurses must meticulously document the time of the first void as it is a critical data point for assessing renal function and hydration status in the newborn.
Failure to void within 24 hours is a red flag that requires prompt nursing assessment and notification of the healthcare provider to rule out issues like dehydration, renal anomalies, or obstruction.
What if? The newborn was born prematurely. A premature infant may have a delayed first void due to immature kidney function, but the 24-hour mark remains a crucial point for assessment, prompting a more thorough evaluation of fluid balance and renal health.

How to Approach the Question

First, identify the question's focus: the standard time frame for a newborn's first urination.
Recognize this as a factual recall question about a key neonatal milestone.
Evaluate the options. They present different time windows (10, 12, 14, and 24 hours).
Recall the clinical standard used for assessment. While many babies void early, there is a specific cutoff time that prompts further investigation if not met.
Select the option that represents this established clinical benchmark, which is 24 hours.

Concept Tested & Keywords

Concept Tested: Normal physiological functions of a newborn, specifically the timing of the first void.
Stem keywords: newborns, pass urine, time periods
Lead-in keywords: Most

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E6 Obstetrics Williams p. 4-10

E6 Nursing Fundamentals Potter Perry 12e Part 1 p. 171-173

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