DROP FACTOR
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What is the drop factor?
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The drop factor of an infusion set is the number of drops contained in 1 mL.
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Microdrip sets deliver fluids in small-sized drops and are therefore unable to deliver large
volumes of fluid per hour.
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Macrodrip sets deliver fluids in large-sized drops and are therefore able to deliver large volumes
of fluid per hour.
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Some common drop factors are 10, 15, 20, and 60 gtt/mL. Would a set that delivers 60 gtt/mL
be considered a macrodrip or microdrip set?
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What complications can arise if the IV flow rate is irregular?
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It would be considered a microdrip set because the drops have to be smaller in size to
have more drops in the same volume.
Fluid overload, dehydration, or medication overdose could result from irregular IV flow.
The time frame for IVPB infusion is generally less than or equal to 60 minutes.
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How many milliliters per hour should the IV pump be programmed to deliver?
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(750 mL)/(8 h) = x mL/h
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x = 93.75 mL/h
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The nurse will program the IV pump for 94 mL/h.
What is a saline lock?
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A saline lock is an IV catheter that is inserted into a peripheral vein. It can be used for
medications or other fluids on an intermittent basis. The catheter is flushed with saline
to maintain patency.
What is a heparin lock?
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The flushing of heparin locks is known as heparinization and prevents clotting of the
heparin lock. Each institution has its own policy regarding the use and care of heparin
locks.