Question

How to solve these problems?

b) Is the dose safe (CIRCLE ONE)? YES NO c) How many ml would you give? ANSWER 26. A patient has been prescribed 0.9 gm of a medicine IV. Directions for reconstitution state: A mL of diluent to yield 250 mg in I ml. a) To prepare a dosage 0.9 gm how many mL of the drug should you withdraw from the vial after reconstituting the drug as directed? ANSWER Using the concentration above, answer for (a), how would you set the pump if 0.9 gm of the medicine is mixed in 50 ml and is ordered to infuse in 45 minutes? b) ANSWER

Answer 1

ANSWER.

26.a) Calculation of amount (ml) of drug withdrawn from the vial.

            Formula = Desired dose / Dose in hand * Quantity.

               Desired dose (D) = 0.9 gm.

                  Convert gm to mg for calculation

                    So

                      Desired dose (D) = 0.9 * 1000

                                                   = 900 mg.

                      Dose in hand (H) = 250 mg.

                            Quantity (Q) = 1 ml.

       As per formula

        Amount (ml) of medicine withdrawn from the vial = D/ H *Q

                                                                                       = 900 / 250 * 1

                                                                                       = 3.6 ml.

b) Calculation of setting the pump(Rate) for infusion of medicine.

                Formula

                   Rate (ml/hr) = Volume(ml) / Time (hr)

                     Here

                        Volume = 50 ml.

                            Time = 45 min.

                 As per formula

                     Rate of infusion of medicine = 50 / 45

                                                                   = 1.1 ml/hr.