Which patient is a candidate for internal monitoring with an intrauterine pressure catheter?
Correct Answer: B
Rationale: The correct answer is B because the patient is a primigravida (first pregnancy) with frequent contractions (2 to 3 minutes apart, lasting 60 seconds), which indicates active labor and the need for internal monitoring with an intrauterine pressure catheter. This level of contraction frequency and duration suggests progression towards the active phase of labor, where accurate monitoring is crucial for the well-being of both the mother and the baby.
Choice A is incorrect because the contractions are not as frequent or long-lasting as in active labor. Choice C is incorrect because although the contractions are frequent, the duration is longer than typical active labor. Choice D is incorrect because the contractions are irregular and mild, indicating the latent phase of labor where internal monitoring is not necessary.