An IV pump delivers fluids or medication into a patient’s bloodstream at a controlled rate. Using one involves setting a few key parameters, priming the tubing to remove air, loading the tubing into the pump, and monitoring for alarms. Whether you’re a nursing student learning the basics or a patient managing infusions at home, the core steps are the same across most pump models.
Key Parameters You’ll Program
Every IV pump needs at least two pieces of information to run: how much fluid to deliver and how fast. The total amount is called the Volume To Be Infused (VTBI), measured in milliliters. The speed is the flow rate, typically set in milliliters per hour (mL/hr). If a provider orders 100 mL of an antibiotic over one hour, for example, you’d program a VTBI of 100 mL and a rate of 100 mL/hr. Some pumps let you enter the VTBI and the desired infusion time, then calculate the rate automatically.
Depending on the pump and the medication, you may also program bolus doses (a larger amount delivered quickly), pause times, or concentration-based dosing where the pump calculates flow rate from the drug concentration and the patient’s weight.
Priming the Tubing
Before connecting tubing to a patient, you need to flush out all the air inside it. This process is called priming. Spike the fluid bag by inserting the tubing’s drip chamber spike into the bag’s port, then squeeze the drip chamber until it’s about half full of fluid. Open the roller clamp and let fluid flow through the entire length of tubing until it drips steadily from the end, then close the clamp.
As the fluid moves down, invert each access port and backcheck valve and tap them gently. Air tends to collect at these points, and tapping displaces it so the fluid fills the space completely. Once priming is done, inspect the full length of tubing from top to bottom. Any visible air bubbles need to be worked out before you load the tubing into the pump, because the pump’s air-in-line sensor will alarm if it detects them.
Loading and Starting the Pump
Open the pump’s door or channel mechanism and seat the tubing into the designated track. Most pumps have a specific section of tubing that fits into the pumping mechanism, often marked or shaped to guide correct placement. Close the door until it clicks or latches securely. If the tubing isn’t seated properly, the pump will usually alert you before it starts.
Enter the VTBI, flow rate, and any other required parameters using the pump’s keypad or touchscreen. Many modern “smart” pumps include a drug library: a pre-loaded database of medications with built-in dosing limits. When you select a drug from the library, the pump checks your programmed rate against safe upper and lower boundaries. Soft limits warn you of a potential error but let you override them with confirmation. Hard limits physically prevent the infusion from starting if the dose is dangerously outside range. In neonatal intensive care settings, hard limits have caught programming errors as high as 29 times the maximum safe dose.
Once your settings are confirmed, press start. The pump will begin delivering fluid and display the running rate, volume infused, and volume remaining.
Running a Secondary (Piggyback) Infusion
A piggyback setup lets you infuse a second medication through the same IV line without disconnecting the primary bag. Hang the secondary medication bag on the IV pole at the normal height. Then use the plastic extension hook (included with most primary tubing sets) to lower the primary bag so it hangs below the secondary bag. This height difference lets the secondary bag infuse first. When it finishes, the primary infusion resumes automatically because gravity allows fluid from the higher bag to flow.
Program the pump with the secondary bag’s VTBI and rate. The pump will alarm or switch back to the primary settings once the secondary volume is complete.
Common Alarms and What They Mean
Alarms are the pump’s way of telling you something needs attention. In a large retrospective analysis of infusion pump data, the most frequent alarm types broke down like this:
- Downstream occlusion (38% of all alarms): Something is blocking flow between the pump and the patient. Check for kinked tubing, a closed clamp, or a problem at the IV site itself, like a bent catheter or swelling.
- Callback (36%): The pump needs a clinician to respond, often to confirm a setting change or acknowledge a completed task.
- Near end of infusion (13%): The VTBI is almost finished. This is your cue to prepare the next bag or plan to discontinue the line.
- Air-in-line (5%): The sensor detected an air bubble in the tubing. Open the pump door, locate the bubble, and flick or tap the tubing to move it upward and out through an access port. Re-seat the tubing and restart.
- Upstream occlusion (4%): Flow from the bag to the pump is blocked. Check that the roller clamp is open, the bag isn’t empty, and the tubing isn’t kinked above the pump.
For any occlusion alarm, trace the tubing from the bag down to the IV site to find the obstruction. Resolve it, then press the button to silence the alarm and restart the infusion.
Monitoring During Infusion
Once the pump is running, check the IV site regularly for signs of infiltration (swelling, coolness, or pain near the catheter), which suggests fluid is leaking into surrounding tissue rather than entering the vein. Also watch for redness or warmth at the site, which could indicate irritation or infection.
Verify the pump’s display periodically to confirm the rate matches the ordered rate and the volume remaining is decreasing as expected. If the patient is receiving medication through an epidural or intrathecal catheter, monitoring expands to include pain level, vital signs, sedation level, and any changes in sensation or movement, as outlined in the 2024 Infusion Therapy Standards of Practice.
For home infusion patients, telehealth check-ins with a provider can supplement in-person visits, especially if you live far from a clinic. This is a good option for reinforcing how to use the pump and troubleshooting issues in real time.
Battery and Power Management
Most IV pumps run on AC power with a rechargeable battery backup. The battery keeps the infusion going during transport or brief power interruptions, but battery life varies widely between models. Keep the pump plugged in whenever possible to maintain a full charge. If you’re using a pump at home, keep extra batteries on hand if your model uses replaceable ones, and know how to swap them before the current set dies. Your pump supplier can tell you the expected battery life for your specific device.
Cleaning the Pump
IV pumps need disinfection between patients and on a regular schedule during extended use. The critical rule is to follow the manufacturer’s instructions for your specific pump model, because certain cleaning chemicals can damage screens, buttons, or housing over time. Hospital-grade disinfectant wipes containing isopropyl alcohol or sodium hypochlorite (bleach) are commonly used on medical equipment, but concentration and contact time matter. Always check the pump manufacturer’s compatibility list before using a new cleaning product. Wipe down the exterior surfaces, paying attention to the keypad, door latch, and tubing channel where fluid and residue accumulate.