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 A
Explanation
Choice A rationale
Massaging the fundus can help contract the uterus and reduce bleeding. Ensuring IV access is crucial for administering medications rapidly. Methylergonovine (Methergine) and oxytocin help stimulate uterine contractions and reduce postpartum hemorrhage, which can be life-threatening.
Choice B rationale
Administering pain medication might be necessary, but it doesn't address the immediate issue of uterine atony and hemorrhage. Surgical intervention is a last resort and should be prepared for only if medical management fails.
Choice C rationale
Reassessing vital signs and monitoring is important, but it doesn't provide an immediate solution to the bleeding and uterine atony. Immediate action to contract the uterus is crucial.
Choice D rationale
Contacting the attending physician is important, but immediate intervention to stop the bleeding and address uterine atony is critical to prevent further complications.
Correct Answer is D
Explanation
Choice A rationale
Oxytocin is used to induce or augment labor, not typically used before an external version, which is a procedure to turn a breech baby to a head-down position.
Choice B rationale
Methylergonovine is used to prevent or control postpartum hemorrhage by inducing strong uterine contractions, not indicated before an external version.
Choice C rationale
Betamethasone is a corticosteroid used to accelerate fetal lung maturity in preterm labor, not required for an external version.
Choice D rationale
Terbutaline is a tocolytic agent used to relax the uterus, making it easier to manipulate the fetus during the external version procedure.