Gtts Per Minute Formula:
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Gtts per minute (drops per minute) is a measurement used in intravenous (IV) therapy to calculate the flow rate of IV fluids. It helps healthcare providers administer the correct amount of fluid or medication over a specific time period.
The calculator uses the formula:
Where:
Explanation: The formula calculates how many drops should be administered each minute to deliver the prescribed volume over the specified time.
Details: Accurate calculation of gtts per minute is crucial for patient safety. Too rapid infusion can cause fluid overload, while too slow infusion may delay treatment or medication effects.
Tips: Enter the total volume in mL, the drop factor (typically 10, 15, or 20 gtts/mL depending on tubing), and the infusion time in minutes. All values must be positive numbers.
Q1: What are common drop factors?
A: Common drop factors are 10 gtts/mL (macrodrip), 15 gtts/mL, and 60 gtts/mL (microdrip). Always check the packaging of your IV tubing.
Q2: How do I convert hours to minutes?
A: Multiply hours by 60. For example, 2 hours = 120 minutes.
Q3: What's the difference between gtts/min and mL/hr?
A: Gtts/min measures drops per minute, while mL/hr measures milliliters per hour. They're different ways to express IV flow rates.
Q4: How accurate is manual drip counting?
A: Manual counting can vary by ±10%. For critical medications, electronic infusion pumps are more accurate.
Q5: When would I use microdrip vs macrodrip tubing?
A: Microdrip (60 gtts/mL) is used for precise, small-volume infusions. Macrodrip (10-20 gtts/mL) is used for larger volume infusions.