The nurse is caring for a client who is being treated with Magnesium Sulphate.
Ordered 2g/hr
Supplied 10g/250ml bag
What would be the correct calculations for the maintenance dose in ml/hr
50mg/hr
50ml/hr
5mg/mi
5ml/hr
The Correct Answer is B
A. 50mg/hr is not the correct unit for volume, it’s the dose in milligrams.
B. 50 mL/hr is the correct volume to administer to achieve the ordered dose of 2g/hr. Determine the concentration of the solution: The supply is 10g in 250mL. This means the concentration is 10g / 250mL, or 0.04g/mL (since 10g = 10,000mg, this is equivalent to 40mg/mL). Convert the ordered dose to match the concentration: The order is for 2g/hr (which is 2,000mg/hr). Calculate the volume to be infused to deliver the desired dose: Dose = Ordered/concentration= 2000/40= 50 mL/hr
C. 5mg/mL refers to the concentration, not the rate of infusion.
D. 5 mL/hr would administer only 200mg/hr, which is much lower than the ordered dose of 2g/hr.
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Related Questions
Correct Answer is C
Explanation
A. 0.75 mL would provide only 1.5 mg, which is half the prescribed dose
B. 15 mL would provide 30 mg, which is ten times the prescribed dose and could be dangerously toxic
C. 1.5 mL is correct and delivers exactly 3 mg of Stadol, matching the provider's order. To calculate the correct volume to administer, use the formula: Dose to give= ordered dose/concentration= 3/2= 1.5ml
D. 0.9 mL would give 1.8 mg, which is below the ordered dose.
Correct Answer is D
Explanation
A. Cephalhematoma refers to a collection of blood between the baby's skull and the periosteum (the membrane covering the bone), which does not cross the suture lines. It typically occurs after a traumatic delivery, but it is not diffuse edema like caput succedaneum.
B. Molding refers to the shaping of the baby’s head to fit through the birth canal during delivery. It involves temporary changes to the skull bones (such as overlapping sutures) but does not involve edema or soft tissue swelling.
C. Microcephaly is a condition where a newborn's head is abnormally small, usually due to developmental issues, and it has nothing to do with edema or swelling of the soft tissues.
D. Caput succedaneum is the correct term for diffuse edema of the newborn’s scalp that crosses the suture lines. It is caused by the pressure during delivery as the baby's head moves through the birth canal, and it typically resolves within a few days after birth.
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