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Chapter 8 Calculation of Basic IV Drip Rates Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Types of Intravenous Fluids • D5W = D5%W • D5S = D5 %0.9NS • D51/2NS = D5 %0.45NS • NS = 0.9%NS • ½NS = 0.45% NS Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Intravenous Drip Factors • Microdrip = 60 gtt/mL • Macrodrip need to check package – 10 gtt/mL – 15 gtt/mL – 20 gtt/ml • To calculate IV drip rates, must know this information Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Electric Infusion Pumps • Volume for infusion • Rate for infusion • Turn pump on Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Intravenous Piggybacks on Electronic Infusion Pumps • Secondary volume • Secondary rate • Turn pump on Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Calculating Basic IV Drip Rates • Number of milliliters to infuse x tubing factor = drops per minute or gtt/min number of minutes to infuse • When the order reads “hour,” convert to minutes by multiplying by 60 (60 minutes = 1 hour) Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Calculating IV Drips for Infusion Pump • Total number of milliliters ordered = mL/hour Number of hours to run Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Question Order: 1000 mL D5W at 120 mL/hour Available macrodrip 15 gtt/mL What is the drip factor in drops per minute? A. 30 B. 31 C. 32 D. 33 Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Answer A. 30 – 120 mL × 15 gtt/mL = 30 gtt/min 60 minutes Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Determining Hours an IV Will Run • Number of milliliters ordered = Number of hours to run Number of milliliters per hour Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Question How many hours will 500 mL of D5½NS run at 125 mL/hour? A. 3 B. 4 C. 5 D. 6 Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Answer B. 4 – Number of milliliters ordered = Number of hours to run Number of milliliters per hour – 500 mL = 75 mL/hour 4 hours Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Choosing the Infusion Set • Microdrip – IV administered over a long period – Small amount of fluid to be infused – Macrodrops per minute too few • Macrodrip – Order specifies a large amount of fluid over a short time – Microdrips per minute are too many, and counting the drip rate becomes too difficult Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Adding Medications to IVs • Check diluent and volume • Check dose and expiration date of reconstituted solution • Note whether IVPB should be refrigerated before use and remain at room temperature • Calculate the drip rate and record this information on IVPB label Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Reconstitution Device Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins Enteral Nutrition • Used when patient cannot eat or cannot eat enough • Administered with a pump – Intermittent – Cyclic – Continuous Copyright © 2009 Wolters Kluwer Health | Lippincott Williams & Wilkins