Included in the definition of tachysystole is:
Contraction duration of less than 40 seconds.
Contraction frequency of greater than 5 in 10 minutes.
Contraction intensity of less than 80 mm Hg.
Resting tone of less than 18 mm Hg.
The Correct Answer is B
Choice A rationale
Contraction duration less than 40 seconds doesn't define tachysystole. Tachysystole focuses on frequency, not duration, of contractions over a specific time frame.
Choice B rationale
Contraction frequency of more than 5 in 10 minutes defines tachysystole. This frequency indicates excessive uterine activity, requiring intervention to prevent fetal distress.
Choice C rationale
Contraction intensity less than 80 mm Hg does not define tachysystole. Intensity relates to contraction strength, but tachysystole is about frequency exceeding the normal range.
Choice D rationale
Resting tone less than 18 mm Hg isn't part of tachysystole's definition. Tachysystole pertains to contraction frequency, not resting tone, which measures uterine relaxation between contractions.
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Correct Answer is C
Explanation
Choice A rationale
Prolonged labor is not directly linked to drug use and does not present as an immediate complication.
Choice B rationale
Prolapsed cord is not associated with substance abuse and lacks direct connection to this scenario.
Choice C rationale
Cocaine use heightens the risk of abruptio placentae, a serious condition where the placenta detaches prematurely.
Choice D rationale
Retained placenta is a concern but less likely than abruptio placentae in the context of cocaine use.
Correct Answer is B
Explanation
Choice A rationale
Oral rehydration therapy is not used in place of feedings for infants undergoing phototherapy for elevated bilirubin levels. It's crucial to maintain proper nutrition and hydration through regular feedings.
Choice B rationale
Rotating the baby helps ensure even exposure to the bili lights, which aids in breaking down bilirubin effectively across the baby's body.
Choice C rationale
Applying restraints is inappropriate and unnecessary. It could cause distress and is not a standard practice for phototherapy.
Choice D rationale
Administering intravenous fluids is not typically needed unless there's a risk of dehydration or other medical indications as per the doctor's orders.