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
History of preterm birth is the principal risk factor for predicting preterm birth. Previous preterm births significantly increase the likelihood of subsequent preterm deliveries due to
underlying etiological factors.
Choice B rationale
Low prepregnancy weight is a risk factor but not as significant as a history of preterm birth. It can contribute to complications in pregnancy but does not have the same predictive value.
Choice C rationale
Smoking during pregnancy increases the risk of preterm birth but is not the principal risk factor. It is a modifiable behavior that contributes to poor pregnancy outcomes.
Choice D rationale
Obesity can impact pregnancy outcomes but is not the principal risk factor for preterm birth. It is associated with other complications rather than directly predicting preterm delivery.
Correct Answer is C
Explanation
Choice A rationale
While it’s true that increased discomfort is expected with twins due to additional physical strain and space constraints, this alone is not sufficient reassurance. It is vital to assess for
signs of preterm labor or other complications.
Choice B rationale
Performing a digital cervical examination is a valid approach to checking for dilation, but this action must be carefully considered based on other signs and symptoms presented by
the patient. The focus here is on ensuring the absence or presence of labor, which might require hospital assessment.
Choice C rationale
Sending the patient to the hospital to be checked for possible signs of labor ensures that professional monitoring and interventions can occur if labor is confirmed. This action
prioritizes safety, given the increased risk of complications with twin pregnancies and the advanced gestation of 37 weeks.
Choice D rationale
Assuring the patient of the absence of contractions after an examination might provide temporary relief, but it does not address the possibility of other signs of labor or complications
that may require more comprehensive hospital assessment.