The primary purpose of using an IV infusion pump is to:

Rationale: A. Increasing client comfort may be a secondary benefit of IV therapy, but it is not the primary purpose of an infusion pump. The pump itself does not directly affect comfort except by ensuring consistent delivery of medications or fluids. B. Reducing the risk of infection is not achieved directly by using an infusion pump. Infection control depends on proper aseptic technique, catheter care, and line maintenance, not the device used to deliver fluids. C. Eliminating the need for calculations is incorrect. Nurses still need to program the pump correctly, verify orders, and calculate medication doses or infusion rates as appropriate. The pump aids delivery but does not remove the need for clinical judgment or verification. D. Controlling the rate and volume of infusion is the correct answer. IV infusion pumps are designed to deliver fluids and medications at precise rates and volumes, reducing the risk of under- or over-infusion. This precision is especially important for medications with narrow therapeutic windows, critical care fluids, or pediatric patients, where even small deviations can cause harm. Pumps also allow for alarms that alert nurses to occlusions, air in the line, or completion of the infusion, further enhancing safety.