Question

Dentist Dan has asked you, Heidi Hygienist, to draw up a "deadening" solution for Mrs. Bigmouth. You will need 0.02mL/kg of body weight. Mrs. Bigmouth weighs 132 lbs. How much deadener should you draw up into the syringe?

Answer 1

Answer:

  1.2 ml

Explanation:

When dealing with problems like this one, it's essential to make sure that all your units are in the same system.

We are given a concentration of deadener to be 0.02 ml/kg and Mrs. Bigmouth's weight is 132 pounds.

Obviously, we need to convert pounds to kilograms, first.

1 pound equals to 0.45 kg that means that 132 lb equals 132•0.45  which is 59.4 kilograms  

Now comes the easier part. Since we need 0.02 ml per kg, and she weighs 59.4 kg, that means that we need 1.19 ml of deadener. Rounded to the nearest decimal, this would be 1.2 ml.