Question

FLOW RATES 5. Apatient is to receive 100 mg of a drug per hour in an IV solution for a period e)How many grams of the drug must the patient receive daily? 24 hours. The total daily IV volume is 2000 ml How many milliliters must the patient receive per hour to get the appropriate dose? c What is the flow rate in milliliters per minute? d) What is the flow rate in d rops per minute using a venoset calibrated at 15 gtt/mL? e) How many milliliters of IV fluid will the patient receive in 5 hours? How many milligrams of drug will the patient receive in 3.5 hours?

Answer 1

ANSWER.

5) a) Amount(gm) of drug the patient receive daily.

          Amount of drug patient receive per hour = 100 mg.

      So

         Amount of drug patient receive per day or 24 hr = 100 * 24

                                                                                  = 2400 mg.

b) How many ml/hr required for the patient to get appropriate dose.

         Total daily volume(24hr) of IV solution = 2000 ml.

      So

       ml/hr required for the patient to get appropriate dose = Total volume/Time

                                                                                     = 2000/24

                                                                                     = 83.33 ml/hr.

c) Flow rate in ml/min.

        Flow rate = Volume(ml) / Time(min).

               Total volume(ml) = 2000 ml.

                      Time(min) = 24hr.

                                       = 24 * 60 minute

                                       = 1440 min.

        Flow rate = 2000 / 1440

                        = 1.39 ml/min.

d) Flow rate in drops per minute.

           Drops per minute(gtt/min) = Volume(ml) / Time(min) * Drop factor(gtt/ml)

       Here

           Volume(ml) = 2000 ml.

             Time(min) = 1440 min.

     Drop factor = 15 gtt/ml.

As per above formula

      Drops per minute = 2000/1440 * 15

                                    = 1.39 * 15

                                    = 20.83 gtts/min.

e) How many ml of IV fluid patient receive in 5 hr.

         Amount(ml) of IV fluid patient receive in 1 hr = 83.33 ml

    So

      Amount(ml) of IV fluid patient receive in 5 hr = 83.33 * 5

                                                                             = 416.65 ml.

f) Amount (mg) of drug patient receive in 3.5 hr.

     Amount(mg) of drug patient receive in 1 hr = 100 mg.

So

   The amount(mg) of drug patient receive in 3.5 hr = 100 * 3.5

                                                                         = 350 mg.