For problems involving adult patients, the answer will be rounded to the nearest tenth. Although some IV pumps do not allow calibration to the tenth or hundredth, for the purpose of this exam, IV rate calculations will be rounded to the nearest whole drop (gt/min) or to the nearest whole number IV (ml/hr). To promote safety, a zero must be placed to the left of the decimal point in answers that are less than one. No zero is allowed to the right of the decimal point in answers that are whole numbers. For example, 0.5 mg must be answered as 0.5 mg and 5.0 mg must be answered as 5 mg.
The physician orders: Magnesium 4 gms loading dose to infuse over 30 minutes at 0500. Then infuse a maintenance dose of 1 gram /hr. The pharmacy sends 80 Gms in 1000 mL of LR. What would the nurse set the pump for the loading dose at 5 Am? Be sure to enter the number AND the unit of measurement (mL). Partial credit will not be given.
The Correct Answer is ["200"]
To find the loading dose rate, we need to use the formula:
Rate (mL/hr) = Dose (g) x Volume (mL) / Time (hr) x Concentration (g)
Plugging in the given values, we get:
Rate (mL/hr) = 4 g x 1000 mL / 0.5 hr x 80 g
Simplifying, we get:
Rate (mL/hr) = 100 g/mL / 40 g/hr
Rate (mL/hr) = 2.5 mL/g
Multiplying by 1000, we get:
Rate (mL/hr) = 2500 mL/g x g/hr
Canceling out the units of g, we get:
Rate (mL/hr) = 2500 mL/hr
Rounding to the nearest whole number, we get:
Rate (mL/hr) = 200 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Hypertension is the most common risk factor for placental abruption, which occurs when the placenta separates from the uterine wall before delivery. Hypertension can cause damage to the blood vessels that supply the placenta, leading to reduced blood flow and increased pressure in the intervillous space. This can cause hemorrhage and detachment of the placenta.
The other options are not as common as hypertension, but they can also increase the risk of placental abruption by causing trauma, vasoconstriction, or inflammation in the placenta or uterus.
Maternal batering can cause direct injury to the abdomen or uterus, resulting in placental abruption.
Maternal cigarete smoking can cause vasoconstriction and reduced blood flow to the placenta, as well as increase the risk of thrombosis and inflammation in the placental vessels.
d. Maternal cocaine use can cause severe vasoconstriction and hypertension, which can impair placental perfusion and cause placental abruption.
Correct Answer is D
No explanation
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