Question

19. Intravenous medications ordered for the treatment of at-risk patients, such as the acutely ill and the frail young and elderly, may require calculation and adjustment of dosage depending on the patient's response (ie. blood pressure, heart rate, blood sugar). This is called: a) dosing b) titrating c) priming d) bolusing 20. Ordered: isoproterenol hydrochloride infusion at 0.2 mcg /kg / min, is ordered for a patient in shock. Available: isoproterenol hydrochloride 1 mg/250 mL D5W. Patient's weight: 90 kg. Calculate to the nearest tenth: a.) micrograms per minute ordered: DA: b). milliliters per hour (to the nearest tenth) to be administered via EID: DA:

Answer 1

ANSWER.

19) a) Intravenous medications may require calculation and adjustment of dosage

depending on patient's response is called dosing.

20) a) Calculation of mcg/min ordered for this patient.

                  Ordered dose = 0.2 mcg/kg/min.

                   Patient weight = 90 kg.

             mcg/min for this patient = 0.2 * 90

                                                    = 18 mcg/min.

    b) Calculation of ml/hr.

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

          Calculation of volume

                  Volume(ml) = Desired dose(D) / Dose in hand (H) * Quantity(Q)

      Here

            Desired dose(D) = 18 mcg/min.

            Dose in hand (H) = 1 mg

      Convert mg to mcg

                     1 mg = 1000 mcg.

              Quantity (Q) = 250 ml

   As per formula

         Volume of drug required = D/H * Q

                                                 = 18/1000 * 250

                                                 = 0.018 * 250

                                                 = 4.5 ml/min.

       Convert ml/min to ml/hr by multiply with 60

                 So

                        ml/hr = 4.5 * 60

                                 = 270 ml/hr.