Ralph K. answered • 01/23/15

Tutor

5.0
(253)
Effective Mathematics, Physics and Chemistry Tutor

Hi Jasmine,

I am not a pharmacologist, doctor or nurse, but this is mostly a math and chemistry problem, and I can help you with that.

The infant weighs 5.31lb.

Convert to kg = 5.31 lb / 2.2 lb/kg = 2.41 kg.

The patient needs 15 mg dilantin per kg of body weight = 15 mg/kg *2.41 kg = 36.2 mg of dilantin

The dilantin comes in 10ml vials of 6% solution. a 10ml vial = 10g (of water) *.06 (6%) = 600mg dilantin per vial

The final concentration is to be 0.5% so the dilantin solution needs to be mixed 11 parts saline with 1 part 6% dilantin.

The easiest way to do this is to draw 0.9 ml of the dilantin solution and inject it into a 10ml vial of Normal Saline and mix the solution well in the vial. This will produce 10.9 ml of 0.5% dilantin solution.

This solution has 5mg of dilantin per ml (0.5%).

We need 36.2 mg of dilantin so we measure 36.2 mg / 5 mg/ml = 7.25 ml.

Now you can inject the patient.

I hope this helps.

If you have any other questions ask away. If this was helpful, please give the answer a thumbs up.