Enteral feeding pumps are medical devices that deliver liquid nutrition through a tube into the stomach or small intestine. They are used when a patient’s digestive system works but the patient cannot safely eat enough by mouth. The pump controls how fast the formula flows, which helps prevent discomfort, dehydration, and underfeeding.
Understanding the pump system helps students connect biology, physics, and medical technology in a real clinical tool.
A typical system includes a nutrition bag, tubing, a pump, a feeding tube, and the patient’s stomach or intestine. The pump uses a motor-driven mechanism to push or regulate liquid flow at a programmed rate, usually measured in milliliters per hour. Sensors and alarms help detect problems such as empty bags, blocked tubing, low battery, or open doors.
Careful setup, correct programming, and regular monitoring are essential for safe nutrition delivery.
Key Facts
- Flow rate is measured as volume per time: flow rate = volume ÷ time.
- If 600 mL is delivered over 8 h, the pump rate is 600 mL ÷ 8 h = 75 mL/h.
- Total volume delivered is found by volume = rate × time.
- Enteral feeding uses the gastrointestinal tract, while parenteral feeding delivers nutrients into the bloodstream.
- Common pump alarms warn about occlusion, empty bag, low battery, door open, or completed feeding.
- Feeding tubes may enter through the nose, stomach wall, or small intestine depending on the patient’s needs.
Vocabulary
- Enteral feeding
- Enteral feeding is the delivery of liquid nutrition into the stomach or intestine through a tube.
- Feeding pump
- A feeding pump is a programmable device that controls the rate and amount of liquid nutrition delivered through tubing.
- Formula
- Formula is the liquid nutrition mixture that contains calories, protein, water, vitamins, and minerals for the patient.
- Occlusion
- An occlusion is a blockage or kink in the tubing that stops or reduces the flow of liquid nutrition.
- Flow rate
- Flow rate is the amount of liquid that moves through the tube each unit of time, often measured in milliliters per hour.
Common Mistakes to Avoid
- Confusing enteral feeding with intravenous feeding is wrong because enteral feeding uses the digestive tract, not a vein.
- Programming the total volume as the hourly rate is wrong because volume and rate are different settings and can cause overfeeding or underfeeding.
- Ignoring a pump alarm is wrong because alarms often signal a real problem such as a blockage, empty bag, or disconnected tube.
- Forgetting to check tube placement and tubing connections is wrong because incorrect placement or loose connections can prevent nutrition from reaching the intended location.
Practice Questions
- 1 A patient needs 900 mL of formula over 12 hours. What pump rate in mL/h should be programmed?
- 2 A pump runs at 80 mL/h for 6.5 hours. How many milliliters of formula are delivered?
- 3 A pump alarm indicates an occlusion during feeding. Explain two possible causes and why the pump should not simply be restarted without checking the tubing.