Med Math: Drips Question #3

Question

A client in ICU who weighs 157 lbs requires continuous heparin. Ordered is heparin 15 units/kg/hr. On hand is 25,000 units heparin in 500 mL D5W. Calculate the IV flow rate in mL/hr.

Answers

  1. 214.2 mL/hr
    • Rationale:
  2. 15.6 mL/hr
    • Rationale:
  3. 7.4 mL/hr
    • Rationale:
  4. 21.4 mL/hr
    • Rationale:

Overview

Explanation

Correct response = total u/total vol = units per kg per hr / x mL
25,000units/500 mL = 1070.4 units per hr/ x mL = 535,200/25,000 = 21.4 mL
DA calculation = mL/hr = 500 mL 1/25,000 u 50 x 15 u/kg/hr x 1 kg/2.2 lbs x 157 lbs/1 = 15 x 157/50 x 2.2 = 2355/ 110 = 21.4

Learning Outcomes

Test Taking Tip

Video Rationale