On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Troubleshoot source-container setup, tubing restrictions, disposable positioning, reservoir filling, and fluid-detection conditions when a fluid-out alarm occurs prematurely.
Step-by-Step Troubleshooting
1. Maintain Patient Therapy
Do not continue relying on an RI-2 that repeatedly indicates fluid out while fluid remains available.
Move therapy to a verified alternative before troubleshooting if rapid infusion remains clinically required.
Expected outcome: Patient care continues without dependence on an unreliable fluid-supply indication.
2. Confirm the Reported Condition
Record the exact alarm and determine whether fluid is visibly present in:
- The source container
- The disposable pathway
- The reservoir area
- The downstream tubing
Determine whether the alarm occurred during priming or active delivery.
Expected outcome: The point at which fluid appears to stop reaching the device is identified.
3. Verify the Fluid Source
Check the source container for:
- Adequate fluid
- Proper positioning
- A fully seated connection
- Collapsed or obstructed outlet
- Closed clamp
- Kinked tubing
A container can contain fluid while still failing to supply it effectively.
Expected outcome: Fluid can leave the source container without an external restriction.
4. Trace the Upstream Tubing
Inspect the complete accessible path from the source toward the RI-2 for:
- Kinks
- Pinching
- Closed clamps
- Twisted tubing
- Compression by equipment or bedding
- Loose fittings
- Air locks or incomplete priming
Expected outcome: The upstream pathway is open and unobstructed.
5. Check Disposable Loading
Verify that the disposable is correctly installed and that tubing is fully seated at accessible guides, sensors, and loading locations.
Incorrect seating may interfere with fluid movement or detection.
Expected outcome: The disposable is correctly positioned without deformation or misrouting.
6. Inspect Reservoir Filling Behavior
During a controlled bench setup, observe whether fluid enters and remains available in the disposable reservoir area as expected.
If the reservoir does not fill despite an adequate source, recheck upstream flow and disposable condition.
Expected outcome: Fluid progresses normally from the source into the disposable pathway.
7. Substitute a Known-Good Source and Disposable
Use an appropriate test fluid source and known-good compatible disposable to separate device behavior from a faulty bag, connection, or disposable.
Expected outcome: The fluid-out alarm does not occur while the known-good setup maintains fluid supply. If normal operation is restored, troubleshooting can stop after final verification.
8. Inspect Accessible Detection Areas
Inspect externally accessible fluid-detection surfaces and tubing positions for contamination, moisture, residue, deformation, or improper seating.
Do not insert objects into or adjust internal sensing components.
Expected outcome: Accessible sensing areas are clean, unobstructed, and properly aligned with the disposable.
9. Perform Final Functional Verification
Run the RI-2 under an appropriate bench test with adequate fluid available.
Verify that:
- Fluid enters the system normally
- No premature fluid-out alarm occurs
- Flow remains stable
- Alarm indications remain functional
Expected outcome: Fluid-out detection behaves consistently with actual fluid availability.
10. Escalate Persistent False Fluid-Out Alarms
If premature fluid-out alarms occur with multiple known-good disposables and a verified fluid source, remove the unit from service.
Expected outcome: The device is held for qualified service rather than returned with unreliable fluid detection.
If the Problem Persists
External supply restrictions, clamps, tubing position, disposable condition, source setup, and accessible detection conditions have been ruled out.
The remaining cause may involve internal fluid sensing, actuation, control electronics, or another service-level condition.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate manufacturer documentation and approved test equipment
- Repaired or configured only by qualified personnel
Return-to-service testing should verify correct fluid detection throughout representative operation.
Knowing when to stop external troubleshooting and escalate is proper troubleshooting.
Clinical Use Tip
Always trace the entire source-to-device pathway; a bag containing fluid does not guarantee that fluid is actually reaching the rapid infuser.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported a fluid-out alarm even though the connected fluid bag was not empty."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the upstream tubing kinked between the fluid source and disposable."
Resolution
What action was taken.
Example:
"The restriction was corrected, the system was reprimed, and the RI-2 completed functional testing without a premature fluid-out alarm."
Helpful Details to Include (If Known)
- Exact alarm message
- Fluid remaining in source
- Bag or container position
- Clamp positions
- Upstream tubing condition
- Disposable seating
- Reservoir filling behavior
- Known-good disposable result
- Known-good fluid-source result
- Final alarm behavior
- Final device status
Final Thought
Verify that fluid is truly reaching the device before assuming a sensing failure, correct accessible restrictions first, and escalate only after a known-good setup still produces the fault.
That is successful troubleshooting.