ºÝºÝߣ

ºÝºÝߣShare a Scribd company logo

Nurs 1600 iv math review fall 2013

•
•
Victoria Lynn
Victoria Lynn

This document provides an overview of how to calculate IV infusion rates in milliliters per hour and drops per minute. It includes examples of calculating rates for full bag infusions over various time periods, as well as partial bag infusions. Key points covered include using the drop factor listed on IV tubing packaging to determine drops per minute, and rounding rules for rates set with or without an IV pump. Practice problems are provided to allow students to apply the calculation methods.

1 of 2
Downloaded 15 times
NURS 1600: IV Math Review Clinical Calculations Please review this IV Math handout prior to attending both lecture and lab next week. Your lab test out may require you to complete an IV Math calculation. Calculating Milliliters per Hour ML Hour Ml’s Ordered Hours for Infusion 1. Ex: 3 liters (3000 milliliters) to be given over 24 hours (3000ml/24hr) 3000ml= 125ml/ hour 24 hr 2. Ex: 1 liter (1000 milliliters) to be administered at rate of 250ml/hr (1000ml/250ml) 1000ml= (4) hours to complete this infusion 250ml/hr Calculating Milliliters per Hour (Less than 1 hour) 3. Ex: 200ml’s to be administered over 30 minutes. At what rate will the nurse set the pump: 200ml X 60 Minutes 30 Minutes 1 Hour = Answer: 400ml/hr Calculating Drops per Minute Intravenous (IV) infusion pumps are set to run at milliliters per hour (ml/hr) unless otherwise stated. IV infusion sets typically are categorized as either Macro or Micro drop sets: (Note: look in the top right hand corner of IV packaging for the drop factor): • Macro Drop Set: a. 10 drops/milliliter (10 gtt/ml) b. 15 drops/milliliter (15 gtts/ml) c. 20 drops/milliliter (20 gtts/ml) • Micro Drop Set: d. 60 drops/milliliter (60 gtts/ml) Volume X Drop Factor Time (in Minutes) Ex: 125ml X 60gtt/ml = 125gtt/min Ex: 125ml X 15gtt/ml = 31.25= 31.3 gtt/min 60 minutes 60 minutes (Note: IV Pumps can run IV infusions at a Rate of 31.3) Milliliters per Hour (Less than 1 Hour or More than 1 Hour) 4. Ml/hour x drop factor/ (minutes) Ex: 125ml X 60gtt/ml = 250gtt/min 30 minutes Ex. 125ml X 10gtt/ml = 10.4gtt/min 120 minutes
Practice Problems 1. The physician orders Ampicillin 1 g in 100 mL of D5W IVPB to infuse over 20 minutes. Tubing drop factor is 15 gtt/ml. Calculate the flow rate in drops per minute. ____________________ ANS: 75gtt/min 2. The patient has Vancomycin 1250 mg ordered once daily for an infection. The Vancomycin is available in 250 mL of NS and should infuse over 2 hours. Using an IV pump, how many milliliters per hour should the Vancomycin infuse? ___________ ANS: 125 mL/h 3. Azithromycin 500 mg IV once a day is ordered for a patient. The Azithromycin is dissolved in 250 mL of NS and should infuse over 60 minutes. Using tubing with a drop factor of 10 gtt/ml along with an IV pump, what rate should the Azithromycin be infused per hour and also calculate the drops per minute? ___________ ANS: 250ml/hr & 41.7gtt/min 4. The patient has D5W 500 mL ordered over 6 hours. No IV pump is available, how many milliliters per hour should the IV fluids infuse? ___________ ANS: 83 mL/h 5. Albumin 25% is ordered IV now. The albumin is available in 100 mL bottles and is to infuse over 30 minutes. Using a 20 gtt/ml tubing, how many drops per minutes should the albumin be infused? ________ ANS: 67gtt/min 6. 500ml’s of D10 is to infuse over 10 hours. No pump is available. Calculate the IV rate using a Microdrip IV tubing set. ________ ANS: 50gtt/min Rounding: 1. Whenever calculating drop factor’s without an IV Pump you always want to leave your answer as a whole number. Rounding round rules apply: a) For Example: 20.3 = 20 b) For Example: 20.8 = 21 2. Whenever calculating drop factor’s and you have an IV Pump available you can leave your answer as in the 10th’s Place: a) For Example: 20.3 b) For Example: 20.8 3. Certain Medications and All High Risk Meds Always Need to be on an IV Pump, for example: a) Heparin b) Insulin Drip c) Electrolytes d) Vasoactive Medications Continue to Practice Math Problems from your Clinical Calculations Book (Kee & Marshall)

More Related Content

Nurs 1600 iv math review fall 2013

  • 1. NURS 1600: IV Math Review Clinical Calculations Please review this IV Math handout prior to attending both lecture and lab next week. Your lab test out may require you to complete an IV Math calculation. Calculating Milliliters per Hour ML Hour Ml’s Ordered Hours for Infusion 1. Ex: 3 liters (3000 milliliters) to be given over 24 hours (3000ml/24hr) 3000ml= 125ml/ hour 24 hr 2. Ex: 1 liter (1000 milliliters) to be administered at rate of 250ml/hr (1000ml/250ml) 1000ml= (4) hours to complete this infusion 250ml/hr Calculating Milliliters per Hour (Less than 1 hour) 3. Ex: 200ml’s to be administered over 30 minutes. At what rate will the nurse set the pump: 200ml X 60 Minutes 30 Minutes 1 Hour = Answer: 400ml/hr Calculating Drops per Minute Intravenous (IV) infusion pumps are set to run at milliliters per hour (ml/hr) unless otherwise stated. IV infusion sets typically are categorized as either Macro or Micro drop sets: (Note: look in the top right hand corner of IV packaging for the drop factor): • Macro Drop Set: a. 10 drops/milliliter (10 gtt/ml) b. 15 drops/milliliter (15 gtts/ml) c. 20 drops/milliliter (20 gtts/ml) • Micro Drop Set: d. 60 drops/milliliter (60 gtts/ml) Volume X Drop Factor Time (in Minutes) Ex: 125ml X 60gtt/ml = 125gtt/min Ex: 125ml X 15gtt/ml = 31.25= 31.3 gtt/min 60 minutes 60 minutes (Note: IV Pumps can run IV infusions at a Rate of 31.3) Milliliters per Hour (Less than 1 Hour or More than 1 Hour) 4. Ml/hour x drop factor/ (minutes) Ex: 125ml X 60gtt/ml = 250gtt/min 30 minutes Ex. 125ml X 10gtt/ml = 10.4gtt/min 120 minutes
  • 2. Practice Problems 1. The physician orders Ampicillin 1 g in 100 mL of D5W IVPB to infuse over 20 minutes. Tubing drop factor is 15 gtt/ml. Calculate the flow rate in drops per minute. ____________________ ANS: 75gtt/min 2. The patient has Vancomycin 1250 mg ordered once daily for an infection. The Vancomycin is available in 250 mL of NS and should infuse over 2 hours. Using an IV pump, how many milliliters per hour should the Vancomycin infuse? ___________ ANS: 125 mL/h 3. Azithromycin 500 mg IV once a day is ordered for a patient. The Azithromycin is dissolved in 250 mL of NS and should infuse over 60 minutes. Using tubing with a drop factor of 10 gtt/ml along with an IV pump, what rate should the Azithromycin be infused per hour and also calculate the drops per minute? ___________ ANS: 250ml/hr & 41.7gtt/min 4. The patient has D5W 500 mL ordered over 6 hours. No IV pump is available, how many milliliters per hour should the IV fluids infuse? ___________ ANS: 83 mL/h 5. Albumin 25% is ordered IV now. The albumin is available in 100 mL bottles and is to infuse over 30 minutes. Using a 20 gtt/ml tubing, how many drops per minutes should the albumin be infused? ________ ANS: 67gtt/min 6. 500ml’s of D10 is to infuse over 10 hours. No pump is available. Calculate the IV rate using a Microdrip IV tubing set. ________ ANS: 50gtt/min Rounding: 1. Whenever calculating drop factor’s without an IV Pump you always want to leave your answer as a whole number. Rounding round rules apply: a) For Example: 20.3 = 20 b) For Example: 20.8 = 21 2. Whenever calculating drop factor’s and you have an IV Pump available you can leave your answer as in the 10th’s Place: a) For Example: 20.3 b) For Example: 20.8 3. Certain Medications and All High Risk Meds Always Need to be on an IV Pump, for example: a) Heparin b) Insulin Drip c) Electrolytes d) Vasoactive Medications Continue to Practice Math Problems from your Clinical Calculations Book (Kee & Marshall)