1.A patient is prescribed pethidine 400 mg in 500 mL of normal saline. The solution is to be infused via an infusion pump at between 10 and 40 mL/hr, depending on the nurse’s assessment of the...

1.A patient is prescribed pethidine 400 mg in 500 mL of normal saline. The solution is to be infused via an infusion pump at between 10 and 40 mL/hr, depending on the nurse’s assessment of the patient’s pain.

a
Calculate the concentration of the pethidine in saline solution.

b
How many milligrams of pethidine will the patient receive hourly if the pump is run at 15 mL/hr?

c
At what rate should the pump be set to deliver 20 mg/hr? Give the answer to the nearest whole number.

2.
One gram of dextrose provides 16 kJ of energy. How many kilojoules does a patient receive from an infusion of half a litre of 10% dextrose?