The formula to calculate flow rate is given by;Flow Rate = Volume ÷ TimeThe problem states that your patient has a deep vein thrombosis of the right calf and the physician ordered 500 mLD/5/W with 50,000 units of heparin, 1800 units per hour. We need to calculate the flow rate in milliliters per hour.To calculate the flow rate, we need to use the following formula:Flow rate (mL/hour) = Total volume (mL) ÷ Infusion time (hours)The infusion time is 5 hours and we are administering 500 mL of fluid. The heparin is already included in the solution, so we don't need to calculate a separate infusion rate for it. We can calculate the flow rate as follows:Flow rate (mL/hour) = 500 mL ÷ 5 hoursFlow rate (mL/hour) = 100 mL/hourTherefore, the flow rate in milliliters per hour is 100 mL/hour.Conclusion:The flow rate in milliliters per hour is 100 mL/hour.The IVPB is infusing at 0.5 mcg/min, and the solution concentration is 50 mcg in 100 ml NS. We need to calculate the pump setting in ml/hr.Here, we can use the following formula to calculate the pump setting in ml/hr:Pump setting (mL/hour) = (Total volume × Dose)/ (Concentration × Time)We know that;The Dose = 0.5 mcg/minConcentration = 50 mcg in 100 ml NSTime = 60 minutes in 1 hourSubstituting the values, we get;Pump setting (mL/hour) = (100 × 0.5)/ (50 × 60)Pump setting (mL/hour) = 0.0833 mL/hour (rounded to the nearest tenth)Therefore, the pump setting in ml/hr is 0.1 mL/hour. (rounded to the nearest tenth)Ans: 0.1 ml/hr.