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(in IV therapy) an apparatus for delivering relatively small measured amounts of IV solutions at specific flow rates over time, as when it is necessary to keep a vein open. The size of the drops is controlled by the fixed diameter of the plastic delivery tube. With a microdrip, 60 drops delivers 1 mL of solution.
In intravenous therapy, an infusion system that delivers 60 drops/mL that is used when small volumes are being delivered (e.g., less than 50 mL/hour); this reduces the risk of blood clotting in the intravenous line due to slow infusion rates. When using the microdrip system, the IV drip calculation is thus: drops/minute = mL/hour.
[G. mikros, small]