![]() ![]() When an IV solution is to run at a rate of 50 mL/h or less, a microdrip set should be used. Microdrip sets are unable to deliver large volumes per hour because their drop size is so small. If large volumes of fluid must be administered (125 mL/h or more), a macrodrip set is required. Macrodrip sets are larger than microdrip sets. A set that delivers 60 drops/mL is called a microdrip set. Sets that deliver 10, 15, or 20 drops/mL are called macrodrip sets. The most common drop factors are 10, 15, 20, and 60 drops/mL. This equivalent may vary with different manufacturers. The drop factor of an infusion set is the number of drops contained in 1 mL. The larger the diameter of the tubing where it enters the drip chamber, the bigger the drop will be. Infusion sets come in a variety of sizes. ![]() (From Clayton BD, Stock YN, Cooper S: Basic pharmacology for nurses, ed 15, St Louis, 2010, Mosby.) These examples show 1000-mL IV bags, but IV fluids are also available in 50-mL, 100-mL, 250-mL, and 500-mL bags.įIGURE 16-3 Intravenous infusion sets. Figures 16-1 and 16-2 show examples of two commonly used IV fluids: 5% dextrose and normal saline, respectively. Intravenous fluids are available in a variety of volumes and solutions. Medications may also be diluted and given in conjunction with IV solutions. Medications and electrolyte milliequivalents are commonly ordered as additives to IV fluids. An IV medication or infusion may be prepared and administered by a physician, nurse, or technician as regulated by state law and the policies of the particular health care agency. Infusions are injections of moderate to large quantities of fluids and nutrients into the patient’s venous system. Intravenous (IV) solutions and medications are placed directly into a vein. It is sometimes necessary to deliver fluids and medications to a patient intravenously. 1 Calculating drops per minute (gtt/min) when given the total volume and time over which an IV solution or intravenous piggyback is to be infusedĢ Calculating milliliters per hour (mL/h) when given the total volume and time over which an IV solution or intravenous piggyback is to be infused ![]()
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