Question

46. The provider ordered heparin 4000 units subcutaneous, every 12 hours. The pharmacy supplies heparin in a 1-mL vial containing 5000 units per mL. What should the nurse administer per dose ? _ 0.8 ml 4000 units 5,000 units X 1 mL = 6.8 mL 47. 15X Calculate the mL per hr for this weight-based infusion. A provider orders a continuous heparin infusion to begin at 15 units per kg per hr. The patient weighs 93.8 kg. The pharmacy supplies heparin in a premixed bag of 40,000 units in 500 mL D5W. 7.6 ml per hc (round to the tenths) 93,8kg 40,000 units: 500ml : 1487 units : x ml. 703500 - 19.6 ml per hr 40,000 Calculate the weight-based infusion rate: A provider orders nitroprusside 3 mcg per kg per min. IV. The IV bag contains nitroprusside 50 mg in 250 mL D5W and the patient weighs 85 kg. (round to the tenths) 1407 units 48. 49. Calculate the weight-based infusion rate: A provider orders inamrinone 0.015 mg per kg per min. The IV bag contains inamrinone 200 mg in 500 mL solution. The patient weight is 149 pounds. (round to the tenths) 50. Calculate the infusion rate: The provider orders amiodarone 2 mg per min. The IV bag contains amiodarone 900 mg in D5W 500 mL. (round to tenths) 51. Calculate the mL per hour for this IV infusion: A provider orders a procainamide IV drip to begin at 5.5 mg per min. The IV bag contains procainamide 2 g in D5W 500 mL. (round to the tenths)

Answer 1

ANSWER.

46) Calculation of volume(ml) of drug required.

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

     Here

          Desired dose(D) = 4000 units.

          Dose in hand(H) = 5000 units.

               Quantity(Q) = 1ml

As per above formula

     Volume(ml) of drug required = D/H * Q

                                                    = 4000/5000 * 1

                                                    = 0.8 ml

47) 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

           Ordered dose = 15 unit/kg/hr.

           Weight of the patient = 93.8 kg.

     So

             Desired dose (D) = 15 * 93.8

                                          = 1407 unit.

             Dose in hand(H) = 40000 unit.

                  Quantity(Q) = 500 ml.

   As per above formula

           Volume(ml) of drug required = D/H * Q

                                                         = 1407/40000 * 500

                                                         = 0.035 * 500

                                                         = 17.5 ml.

                                   Time(hr) = 1 hr

           So

                       ml/hr = 17.5

                                = 18ml/hr.

48) Calculation of infusion rate (ml/hr).

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

       Calculation of volume.

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

      Here

             Ordered dose = 3 mcg/kg/min.

          Weight of the patient = 85 kg.

         Desired dose(D) = 3 * 85

                                     = 255 mcg/min.

         Dose in hand(H) = 50 mg.

   Convert mg to mcg for calculation

               1 mg = 1000 mcg.

          Dose in hand(H) = 50 * 1000

                                     = 50000 mcg.

               Quantity(Q) = 250 ml

As per above formula

        Volume(ml) of drug required = D/H * Q

                                                      = 255/50000 * 250

                                                      = 0.0051 * 250

                                                      = 1.3 ml/min.

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

                  ml/hr = 1.3 * 60

                           = 78 ml/hr.

49) Calculation of infusion rate(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) = 0.015 mg/kg/min.

            Weight of the patient = 149 pound.

     Convert pound to kg for calculation

             1 pound = 0.454 kg

        So

            Weight of the patient = 149 * 0.454

                                              = 67.6 kg.

          Desired dose(D) = 0.015 * 67.6

                                      = 1.01 mg/min.

          Dose in hand(H) = 200 mg.,

                 Quantity(Q) = 500 ml.

As per above formula

        Volume(ml) of drug required = D/H * Q

                                                      = 1.01 / 200 * 500

                                                      = 0.005 * 500

                                                      = 2.5 ml/min.

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

                 ml/hr = 2.5 * 60

                          = 150 ml/hr.

50) Calculation of infusion rate(ml/hr).

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

        Calculation of volume(ml)

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

      Here

            Desired dose(D) = 2 mg.

            Dose in hand(H) = 900 mg.

                 Quantity(Q) = 500 ml.

As per above formula

       Volume(ml) of drug required = D/H * Q

                                                     = 2/900 * 500

                                                     = 0.002 * 500

                                                    = 1 ml/min.

     Convert ml/min to ml/hr

                     ml/hr = 1 * 60

                               = 60 ml/hr.

51) Calculation of infusion rate(ml/hr).

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

          Calculation of volume(ml).

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

      Here

           Desired dose(D) = 5.5 mg.

           Dose in hand(H) = 2000 mg (2 g)

                Quantity(Q) = 500 ml.

   As per above formula

           Volume(ml) of drug required = D/H * Q

                                                         = 5.5/2000 * 500

                                                         = 0.003 * 500

                                                         = 1.5 ml/min.

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

                   ml/hr = 1.5 * 60

                            = 90 ml/hr.