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Asset Type
Surgical Fluid Management System
Manufacturer
Model
What This Guide Helps With
Troubleshooting tank full, fluid level, drain, or waste sensing issues caused by setup, canister, connection, drain, or sensor-related problems.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Action: Confirm the Neptune 3 is not actively supporting a procedure before troubleshooting. If the issue occurs during a case, have clinical staff switch to an alternate suction or waste collection method first.
Expected outcome: Patient care continues without relying on a system with unresolved waste handling or suction interruption.
Why it matters: Fluid management problems can interrupt suction, cause overflow risk, or delay the procedure.
If this resolves the immediate clinical need, stop and evaluate the device after the case.
Verify the Reported Issue
Action: Confirm the exact complaint or message being reported. Identify whether the issue is related to:
- Tank full indication
- Fluid level not reading correctly
- Drain not starting
- Drain not completing
- Waste canister or manifold sensing issue
- Repeated alarms after emptying
Expected outcome: The failure mode is clearly identified before parts or sensors are suspected.
Why it matters: “Tank full,” “will not drain,” and “not sensing canister” may have different causes.
Check the Tank or Waste Container Status
Action: Inspect the collection tank or waste container status. Confirm whether the tank is actually full, partially full, empty, or recently drained.
Expected outcome: The displayed status should match the physical condition of the waste container.
Why it matters: A true full condition is not a device failure. If the tank is full, follow the approved clinical waste disposal process and retest.
If the tank was full and the alarm clears after proper emptying, stop.
Inspect for Improper Setup or Incorrect Accessories
Action: Verify that the correct Stryker-approved waste collection setup, manifold, tubing, and accessories are installed correctly.
Expected outcome: All accessories are seated, aligned, and compatible with the Neptune 3 system.
Why it matters: Incorrect or poorly seated accessories can prevent the system from sensing the waste path correctly.
If reseating or correcting the accessory setup resolves the issue, document and stop.
Check for Kinked, Blocked, or Pinched Tubing
Action: Inspect all visible suction and drain tubing for kinks, clogs, pinches, collapsed sections, or fluid blockage.
Expected outcome: Tubing should be open, routed correctly, and free of visible obstruction.
Why it matters: A blocked fluid path can mimic a full tank, poor drain, or failed waste flow condition.
If tubing correction restores normal operation, stop.
Confirm the Drain Connection and Drain Destination
Action: Verify that the drain hose or docking/drain connection is fully seated and routed to the correct approved drain location.
Expected outcome: The device should recognize the drain connection and allow draining when commanded.
Why it matters: A loose drain connection or improper drain setup may prevent the system from entering or completing drain mode.
If correcting the drain connection resolves the problem, stop.
Inspect the Waste Canister or Tank Seating
Action: Confirm the waste container, tank, lid, seals, or related removable components are fully seated and latched as intended.
Expected outcome: The system should detect the waste container/tank and operate without false sensing errors.
Why it matters: Slight misalignment can cause a sensing issue even when the tank appears installed.
If reseating the component clears the message, stop.
Check for Fluid, Debris, or Residue Around Sensing Areas
Action: Inspect externally accessible sensing areas, tank interface points, drain ports, and connection points for dried fluid, debris, residue, or contamination.
Expected outcome: Sensing and connection areas should be clean, dry, and unobstructed.
Why it matters: Fluid residue or debris can interfere with level detection, accessory recognition, or drain sensing.
If cleaning accessible external areas resolves the issue, document the finding and stop.
Power Cycle the Device Safely
Action: Once the device is disconnected from patient use and fluid handling is safe, power the Neptune 3 off, wait briefly, and power it back on.
Expected outcome: The system should restart normally and recheck tank, drain, and accessory status.
Why it matters: Some sensing faults may be temporary logic or communication issues.
If the device restarts and passes normal checks without alarms, perform a functional check and return to service if appropriate.
Test With a Known-Good Compatible Setup
Action: If available, test using a known-good compatible manifold, tubing set, drain connection, or waste setup.
Expected outcome: The problem should either follow the accessory setup or remain with the device.
Why it matters: Swapping external accessories helps separate a disposable/setup issue from a device sensing issue.
If the issue follows the accessory, replace the accessory and stop.
Check for Repeated False Full or False Empty Indications
Action: Observe whether the device repeatedly reports full when empty, empty when fluid is present, or fails to recognize a drain cycle after setup has been verified.
Expected outcome: Fluid level and tank status should reasonably match the actual condition.
Why it matters: Repeated false indications after setup checks may indicate a sensor, internal connection, calibration, or control issue.
Perform a Final Operational Check
Action: After any correction, verify that the Neptune 3 powers up normally, recognizes the waste setup, does not falsely alarm, and can complete the expected drain or fluid handling process.
Expected outcome: The device operates normally without repeated tank full, drain, or waste sensing messages.
Why it matters: A single cleared alarm is not enough if the device immediately fails again during normal operation.
If the Problem Persists
If the Neptune 3 still reports a false tank full condition, will not recognize the waste setup, will not drain, or continues to show fluid level or canister sensing issues after external checks are complete, remove the device from service.
The device should be:
- Removed from clinical use
- Labeled Out of Service
- Sent for bench evaluation or repair
- Evaluated for internal sensor, wiring, drain system, or control-related failure
Knowing when to stop is proper troubleshooting. Do not continue repeated clinical use when the device cannot reliably sense waste level, tank status, or drain condition.
Clinical Use Tip
Do not troubleshoot a Neptune 3 fluid level or drain issue while it is actively needed for a procedure unless patient safety is already protected. Move the case to alternate suction or waste collection first. Waste handling faults can create suction interruption, spill risk, contamination risk, and workflow delays.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported the Stryker Neptune 3 was indicating tank full and would not allow normal fluid collection."
Cause
What was observed during troubleshooting.
Example:
"Verified the tank was not full, reseated the waste setup, inspected the drain connection, and found the drain hose not fully seated."
Resolution
What action was taken.
Example:
"Corrected the drain connection, power cycled the unit, confirmed the tank full message cleared, and verified normal drain and waste sensing operation."
Helpful Details to Include (If Known)
- Exact displayed message or alarm
- Whether the tank was actually full
- Waste container or manifold reseated
- Drain hose connection checked
- Tubing checked for kinks or blockage
- Any visible debris, residue, or fluid near sensing areas
- Whether a known-good accessory setup was tested
- Whether the issue followed the accessory or stayed with the unit
- Indicator lights, alarm behavior, or touchscreen messages
- Power behavior during restart or drain attempt
- Environmental factors such as waste handling area, docking location, or spill exposure
- Final device status: returned to service or removed from service
Final Thought
Fluid level, tank full, drain, and waste sensing issues should be handled logically and safely. Check the actual tank condition, accessory setup, tubing path, drain connection, and external sensing areas before assuming an internal failure. If the Neptune 3 cannot reliably detect waste status or complete draining after basic checks, remove it from service and document the troubleshooting clearly.
That is successful troubleshooting.