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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Wrap the newborn in a blanket helps maintain body heat after the initial drying and stimulation but is not the first priority in thermoregulation.
B. Put a hat on the newborn's head also helps prevent heat loss, particularly from the head, which is a major site of heat loss in newborns. However, this should be done after drying to avoid trapping moisture.
C. Check the newborn's temperature is important but should be done after immediate measures to prevent heat loss have been taken.
D. Dry the newborn thoroughly is the first and most critical step in preventing evaporative heat loss, which is the primary cause of newborn heat loss immediately after birth. Removing wet amniotic fluid from the skin helps stabilize temperature effectively.
Correct Answer is D
Explanation
A. Progesterone plays a significant role in maintaining pregnancy and preparing the breasts for lactation, but it is not responsible for the milk let-down reflex.
B. Estrogen helps with breast development and ductal growth during pregnancy, but it does not trigger the milk let-down reflex.
C. Prolactin is responsible for milk production (lactogenesis) but not for the actual release of milk from the breast.
D. Oxytocin is the hormone responsible for the milk let-down reflex, which causes milk to be released from the milk glands into the nipple when the baby suckles. It also promotes uterine contractions after childbirth.
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