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📘 How Insulin Pumps Work

An insulin pump is a small delivery system worn on the body.

3
lessons
~15 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. The Pump Has Two RhythmsExplain how a pump delivers basal and bolus insulin through an infusion set.A pump provides a programmed background stream and shorter bolus deliveries using a reservoir, motor, and infusion pathway.
  2. The Sensor Sees a Moving SignalDescribe how a CGM measures interstitial glucose and communicates trends.A sensor, transmitter, and receiving software turn repeated estimates into a glucose trend that people and algorithms can use.
  3. Closing the Loop CarefullyTrace how CGM data, an algorithm, and a pump form an automated insulin delivery loop.The loop measures, calculates, delivers, and measures again, while hybrid systems retain human input and bounded safety behavior.

Questions this course answers

Which description best distinguishes basal from bolus insulin delivery by a pump?

Basal delivery provides a continuing background amount; a bolus is a more concentrated delivery over a shorter interval, often for a meal or correction.

Put the basic CGM information path in order.

The sensor produces the estimate, the transmitter communicates it, and receiving software turns the data into a display or algorithmic input.

Match each component with its main role in an automated insulin delivery system.

The system divides sensing, decision-making, and delivery among connected components.

Grounded in trusted sources

  • American Diabetes Association Professional Practice Committee, Diabetes Technology: Standards of Care in Diabetes-2025: https://diabetesjournals.org/care/article/48/Supplement_1/S146/157557/7-Diabetes-Technology-Standards-of-Care-in
  • U.S. Food and Drug Administration, Types of Artificial Pancreas Device Systems: https://www.fda.gov/medical-devices/artificial-pancreas-device-system/types-artificial-pancreas-device-systems
  • National Institute of Diabetes and Digestive and Kidney Diseases, Artificial Pancreas: https://www.niddk.nih.gov/health-information/diabetes/overview/managing-diabetes/artificial-pancreas
  • National Institute of Diabetes and Digestive and Kidney Diseases, Continuous Glucose Monitoring: https://www.niddk.nih.gov/health-information/diabetes/overview/managing-diabetes/continuous-glucose-monitoring
  • MedlinePlus Medical Encyclopedia, Insulin pumps: https://medlineplus.gov/ency/patientinstructions/000963.htm
  • Centers for Disease Control and Prevention, Continuous Glucose Monitors: https://www.cdc.gov/diabetes/treatment/continuous-glucose-monitors.html

Every Wunder lesson is built from real, reputable sources — never invented.

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