A nurse is caring for a client who is at 16 weeks of gestation and reports a sudden gush of vaginal fluid.
Which of the following findings indicates premature rupture of membranes?
Vaginal fluid has a pH of 5.3.
Nitrazine paper turns yellow.
Vaginal fluid is negative for ferning.
Nitrazine paper turns dark blue.
The Correct Answer is D
Choice A rationale
Normal vaginal fluid is acidic due to the presence of Lactobacillus species, which convert glycogen to lactic acid, maintaining a pH typically between 4.5 and 6.0. Amniotic fluid is alkaline, with a pH usually ranging from 7.0 to 7.5. Therefore, a pH of 5.3 indicates acidic vaginal secretions, suggesting the fluid is likely not amniotic fluid and ruling out premature rupture of membranes (PROM).
Choice B rationale
Nitrazine paper is used to test the pH of vaginal fluid. It is impregnated with a pH-sensitive dye. When the paper comes into contact with acidic fluid (normal vaginal secretions, pH < 6.0), it will remain yellow or turn a yellow-green color. This result indicates an acidic environment, which is inconsistent with the alkaline nature of amniotic fluid (pH≥ 6.5), making PROM unlikely.
Choice C rationale
Ferning refers to the characteristic microscopic crystallization pattern that dried amniotic fluid forms due to its salt and protein content. A negative ferning test means the characteristic pattern is absent. This negative result suggests the fluid is not amniotic fluid, thereby providing evidence against the diagnosis of premature rupture of membranes (PROM).
Choice D rationale
Nitrazine paper turning a dark blue color (or royal blue, deep blue-green, or deep blue) indicates an alkaline pH of 6.5 or greater. Amniotic fluid is alkaline, typically with a pH of 7.0 to 7.5. Therefore, this color change strongly suggests the presence of amniotic fluid, which is the defining diagnostic finding for premature rupture of membranes (PROM).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
While the date of birth is essential information, asking a parent to state it only provides a detail from the medical record, which does not serve as a primary security confirmation of the newborn's identity for safe transport. The primary identification security relies on matching identifiers between the infant and the parent/guardian at the bedside.
Choice B rationale
The newborn's name is recorded in the medical record after birth, but verbal verification of the name alone is not a fail-safe security measure. Identification protocols require objective data comparison, such as unique numbers on corresponding identification bands, to prevent accidental mismatches and potential abduction.
Choice C rationale
The newborn's footprint sheet is typically used as a permanent record for identification purposes but is not the standard, immediate bedside method for confirming identity before transport. The process requires a direct comparison of unique numerical identifiers on the physical bands worn by the client and the newborn.
Choice D rationale
The most secure method is comparing the unique identification numbers (or codes) on the newborn's band with the band worn by the parent/guardian. This dual-band system, verified by the nurse and the parent, ensures positive identification and is a critical safety protocol to prevent misidentification and potential infant abductions.
Correct Answer is A
Explanation
Choice A rationale
The American Academy of Pediatrics recommends that term newborns should be fed on demand or at least every 3 to 4 hours, which provides sufficient caloric intake for growth and prevents hypoglycemia. Formula is digested more slowly than breast milk, so offering a bottle every 3 to 3 1/2 hours is generally appropriate to meet the infant's nutritional needs and satisfy hunger cues. Regular feeding supports adequate weight gain, which is a critical developmental milestone in the neonatal period.
Choice B rationale
For the first few weeks, the nurse should instruct the guardian to wake a sleepy newborn if more than 4 hours have passed since the last feeding to prevent excessive weight loss and hypoglycemia, as their small glycogen stores are rapidly depleted. However, after the initial period and once the infant is feeding well and gaining weight appropriately (usually about 2 weeks old), night waking is typically not necessary.
Choice C rationale
Diluting ready-to-feed formula by adding filtered water is contraindicated because it reduces the caloric and nutrient density below required levels for the newborn's growth. The proper ratio of formula powder or concentrate to water is crucial for providing essential electrolytes, protein, and carbohydrates. Dilution can lead to water intoxication or hyponatremia and cause serious neurological complications due to electrolyte imbalance.
Choice D rationale
Prepared infant formula should be used or discarded within 24 hours if stored in the refrigerator, not 72 hours. Bacteria can rapidly proliferate in prepared formula, even under refrigeration, increasing the risk of gastrointestinal infection for the newborn. Formula ready-to-feed containers, once opened, should also be used within 24 to 48 hours or discarded to maintain optimal safety.
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