Which healthcare provider order for a client with cephalopelvic disproportion would the nurse querry

Step 1 is: The standard initial management for postpartum hemorrhage (PPH) is fundal massage and the administration of the uterotonic drug oxytocin. Since the client's hemorrhage is unresponsive to these, a second-line uterotonic is required. Methylergonovine (Methergine) is a potent uterotonic that directly stimulates smooth muscle contraction.

Step 2 is: Methylergonovine is typically administered intramuscularly (IM) as a 0.2 mg dose. The IM route provides reliable absorption and rapid onset of action (2-5 minutes). The medication is contraindicated in clients with hypertension or preeclampsia due to its potent vasoconstrictive properties, which can cause dangerous blood pressure elevation.

Step 3 is: The nurse must check the client's blood pressure before administration, with a blood pressure of 140/90 mmHg or less often being a required threshold for safe use. The second most critical assessment is urine output (normal range is ≥ 30 mL/h) to assess for signs of hypovolemic shock or renal perfusion compromise, which are important considerations in active hemorrhage.

Step 4 is: Choice B states to administer methylergonovine 0.2 mg intramuscularly if her urine output is less than 50 mL/h. The IM dose and route are correct, but the rationale regarding urine output is incorrect; low urine output is a sign of worsening PPH and not a condition for administering methylergonovine. Choice B must be a typo in the question or options. Choice C offers the correct contraindication (BP below 140/90) for the IV route which is correct for severe hemorrhage although IM is more common. Choice B is the most plausible answer provided in the context of advanced PPH management despite the flaw in the rationale's condition, as it uses the correct dose and route.

Choice A rationale

Insulin resistance is a physiological change occurring in the second and third trimesters, primarily induced by placental hormones like human placental lactogen (hPL), progesterone, and cortisol. These hormones antagonize insulin action at the cellular level, necessitating higher insulin doses to maintain euglycemia. The normal fasting blood glucose is <95 mg/dL and 1-hour postprandial is ≤ 140 mg/dL.

Choice B rationale

The fetus produces its own insulin by approximately 10 weeks gestation and is not dependent on maternal insulin to regulate its blood glucose. Maternal insulin does not cross the placenta due to its large size. Glucose, however, does cross, and maternal hyperglycemia causes fetal hyperinsulinemia and subsequent fetal macrosomia.

Choice C rationale

While circulating blood volume significantly increases (by 30-50%) during pregnancy, leading to some hemodilution, this is not the primary mechanism for increased insulin requirements. The main mechanism is the anti-insulin effect of the aforementioned placental hormones that induce peripheral insulin resistance.

Choice D rationale

While dietary intake and carbohydrate metabolism shift during pregnancy, the major underlying cause for the escalating insulin need is the hormonally mediated increased insulin resistance. Nutritional adjustments are made, but they do not independently cause the progressive need for doubling or tripling of the usual pre-pregnancy insulin dose.