600 mL of normal saline is to be infused over 12 hours using a micro-drop giving set delivering 60 gtt/mL. What is the drip rate in gtt/min?

600 mL of normal saline is to be infused over 12 hours using a micro-drop giving set delivering 60 gtt/mL. What is the drip rate in gtt/min?

• A. 50 gtt/min
• B. 60 gtt/min
• C. 40 gtt/min
• D. 55 gtt/min

Answer: (A)

To find the drip rate in gtt/min, multiply the volume to infuse by the drop factor, then divide by the infusion time in minutes. Convert 12 hours to minutes: 12 × 60 = 720 minutes. So, rate = (600 mL × 60 gtt/mL) / 720 min = 36000 / 720 = 50 gtt/min. Another quick check: 600 mL over 720 minutes is 0.833... mL per minute, and with 60 gtt per mL that becomes 0.833… × 60 ≈ 50 gtt/min.

To find the drip rate in gtt/min, multiply the volume to infuse by the drop factor, then divide by the infusion time in minutes. Convert 12 hours to minutes: 12 × 60 = 720 minutes. So, rate = (600 mL × 60 gtt/mL) / 720 min = 36000 / 720 = 50 gtt/min. Another quick check: 600 mL over 720 minutes is 0.833... mL per minute, and with 60 gtt per mL that becomes 0.833… × 60 ≈ 50 gtt/min.