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 D
Explanation
Choice A rationale
A respiratory rate of 18 breaths/min is normal and does not indicate magnesium toxicity or the need for calcium gluconate.
Choice B rationale
Urinary output of 30 mL/hr is within the acceptable range and does not suggest magnesium toxicity. This indicates adequate renal function.
Choice C rationale
Patellar reflexes rated at one indicate mild hyporeflexia, which can be a side effect of magnesium sulfate but does not necessitate immediate intervention.
Choice D rationale
Serum magnesium level of 10 mg/dL is significantly elevated, indicating magnesium toxicity. Calcium gluconate is the antidote for magnesium toxicity and should be administered
promptly to prevent severe complications.
Correct Answer is B
Explanation
Choice A rationale
Retained tissue can cause postpartum hemorrhage, but with a firm uterus and no other signs of retained placenta, this is less likely the cause here.
Choice B rationale
Trauma is the most likely cause of increased bleeding in this scenario. The prolonged oxytocin induction and macrosomic infant suggest a higher risk of lacerations or uterine atony
despite the firm uterus.
Choice C rationale
Thrombin disorders cause bleeding due to clotting issues. However, this patient shows signs of active bleeding and clotting, making this less likely.
Choice D rationale
Uterine atony, indicated by a soft, boggy uterus, is a common cause of postpartum hemorrhage, but in this case, the uterus is firm, so it's less likely to be the cause.