Question

The recommended maintenance dose of aminophylline for children is 1 mg/kg/h by injection. If 10 mL of a 25-mg/mL solution of aminophylline is added to a 100-mL bottle of dextrose injection, what should be the rate of delivery, in milliliters per hour, for a 40-lb child?

Answer 1

To calculate the rate of delivery of aminophylline for a 40-lb child, convert the weight to kg and multiply by the recommended dose. Then, divide the dose by the concentration of the aminophylline solution to find the rate of delivery in mL/h.

Step-by-step explanation:

To find the rate of delivery for a 40-lb child, we need to first convert the weight of the child to kilograms. Since 1 pound is equal to approximately 0.4536 kilograms, a 40-lb child would weigh 18.14 kg. The recommended maintenance dose of aminophylline for children is 1 mg/kg/h, so for a 40-lb child, the dose would be 18.14 mg/h.

To find the rate of delivery in milliliters per hour, we need to consider the concentration of the aminophylline solution. In this case, 10 mL of a 25-mg/mL solution of aminophylline is added to a 100 mL bottle of dextrose injection. This gives us a total volume of 110 mL of aminophylline solution. Since we want a rate of delivery in milliliters per hour, we divide the dose (18.14 mg/h) by the concentration (25 mg/mL) to get the volume per hour. This gives us a rate of delivery of approximately 0.74 mL/h.

Answer 2

The rate of delivery 7.256 mL/hour for a 40-lb child.

Step-by-step explanation:

The recommended maintenance dose of aminophylline for children = 1 mg/kg h

Mass of children = 40 lb = 18.14 kg

1 lb = 0.453592 kg

Amount of aminophylline for children to be given to in a hour:

= 1 mg/kg h × 18.14 kg × 1 h = 18.14 mg

If 10 mL of a 25 mg/mL solution of aminophylline is added to a 100 mL bottle of dextrose injection.

Amount of dose in 10 mL of 25 mg/mL solution of aminophylline.

The value of dose in which 18.14 mg of dose is present in :

`(10)/(25)* 18.14 mL=7.256 ml`

So, in a an hour 7.256 volume of the solution of aminophylline should delivered to the childrenin an hour.

The rate of delivery 7.256 mL/hour for a 40-lb child.