50 grams of Magnesium sulfate is added to 1L of Lactated Ringers.
After giving an initial loading dose, the nurse is to infuse a maintenance dose of 2 gm/hr. What rate should the IV pump be set at?
10 mL/hr
20 mL/hr
30 mL/hr
40 mL/hr
The Correct Answer is D
Step 1 is to calculate the total amount of Magnesium sulfate in the solution. This is done by multiplying the amount of Magnesium sulfate per mL (which is 50g/L or 0.05g/mL) by the total volume of the solution (which is 1000mL). So, 0.05g/mL × 1000mL = 50g.
Step 2 is to calculate the rate of the IV pump. The maintenance dose is 2g/hr. So, if there are 50g in 1000mL, then 2g would be in (2g ÷ 50g) × 1000mL = 40mL. Therefore, the IV pump should be set at 40 mL/hr.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
While cigarette smoking can increase the risk of many complications during pregnancy, including placental abruption, it is not the most common risk factor. Smoking can cause constriction and damage to the blood vessels in the placenta, but other factors, such as hypertension, are more commonly associated with placental abruption.
Choice B rationale
Hypertension is the most common risk factor for placental abruption. High blood pressure can cause damage to the blood vessels in the placenta, leading to abruption. Chronic hypertension, gestational hypertension, and preeclampsia can all increase a woman’s risk of experiencing a placental abruption.
Choice C rationale
Blunt force trauma, such as that experienced in a car accident or a fall, can cause placental abruption, but it is not the most common risk factor. Any trauma to the abdomen during pregnancy should be evaluated by a healthcare provider to assess for potential complications, including placental abruption.
Choice D rationale
Cocaine use can increase the risk of placental abruption. Cocaine causes intense vasoconstriction, which can compromise the blood flow to the placenta and lead to abruption. However, it is not the most common risk factor for this condition.
Correct Answer is C
Explanation
If a patient in labor at 40 weeks of gestation reports saturating two perineal pads in the past 30 minutes, and placenta previa is suspected, an appropriate nursing action would be to prepare for a cesarean birth. Placenta previa, where the placenta partially or completely covers the cervical opening, can cause significant bleeding and is typically managed with a cesarean delivery to prevent further bleeding and ensure the safety of the mother and baby.
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