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What This Guide Helps With
Troubleshoots unavailable or weak suction caused by tubing, canisters, connections, leaks, blockage, configuration, accessories, or internal vacuum performance.
Step-by-Step Troubleshooting
1. Maintain an Alternate Suction Method
If suction is required for active airway management and the VOCSN suction function is unavailable or weak, immediately provide an appropriate verified alternate suction source.
Do not delay necessary airway clearance while troubleshooting the integrated suction function.
Expected outcome: Reliable suction remains available for the patient independent of the suspect VOCSN.
2. Confirm the Reported Suction Failure
Determine whether:
- Suction will not start
- Vacuum develops but is weak
- Vacuum is intermittent
- The display or control indicates suction but no vacuum is present
- The issue occurs only with a particular tubing or collection setup
Test the suction function off the patient.
Expected outcome: The suction complaint is clearly defined and reproducible.
3. Inspect External Suction Components
Inspect accessible suction tubing, collection canister, lids, adapters, connectors, and any external filters or traps used in the approved setup.
Look for:
- Loose fittings
- Cracked tubing
- Poor canister seals
- Full collection components
- Kinks
- Blockage
- Moisture or secretion contamination
Expected outcome: The external suction path is intact, sealed, and unobstructed.
If correcting the tubing or canister setup restores normal suction, proceed to final verification.
4. Test Directly at the Device Connection
With the VOCSN removed from patient use and following approved procedures, separate the device from suspect downstream accessories and evaluate whether vacuum is produced at the appropriate external suction connection.
This helps distinguish VOCSN performance from tubing or collection-system losses.
Expected outcome: Vacuum is either present at the device and lost downstream, or it is weak directly from the VOCSN.
5. Substitute Known-Good Suction Accessories
Install known-good compatible tubing and collection components and repeat the test.
Expected outcome: Normal suction with known-good accessories identifies the original external accessory as the cause.
Replace defective or contaminated accessories and verify operation.
6. Verify Suction Settings and Availability
Confirm suction therapy is enabled and configured as intended for the controlled test.
Do not modify protected configuration or clinical prescriptions merely to force operation.
Expected outcome: The suction function is available and configured appropriately for testing.
7. Measure Vacuum Using the Approved Procedure
Use the manufacturer-prescribed suction checkout procedure and appropriate test equipment to evaluate vacuum performance.
Verify stable operation and absence of unresolved alarms.
Expected outcome: The VOCSN produces vacuum within applicable manufacturer checkout requirements and does so consistently.
If normal vacuum is restored after correcting an external cause, the issue is resolved and troubleshooting can stop.
If the Problem Persists
If tubing, collection components, seals, obstruction, configuration, and known-good accessories have been ruled out, the fault may involve an internal vacuum source, valve system, pressure sensing, or another service-level suction component.
The VOCSN should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using current Ventec Life Systems documentation and appropriate vacuum test equipment
- Repaired or calibrated only by qualified personnel
After service, verify suction performance as well as any other VOCSN therapies potentially affected by the repair.
Knowing when to stop external troubleshooting and escalate is proper troubleshooting.
Clinical Use Tip
Always have an independent suction option available when airway clearance is essential; integrated suction should not be the only plan when its reliability is uncertain.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Respiratory Therapy reported that the VOCSN suction function activated but produced very little vacuum."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found a cracked suction tube causing a major external vacuum leak."
Resolution
What action was taken.
Example:
"Replaced the damaged tubing and verified stable suction vacuum using the manufacturer checkout procedure before returning the device to service."
Helpful Details to Include (If Known)
- Suction unavailable or low vacuum
- Tubing condition
- Canister and lid condition
- Collection system fullness
- Obstruction or secretion contamination
- Direct device test result
- Known-good accessory comparison
- Vacuum test result
- Alarm behavior
- Final status
Final Thought
Weak suction should be traced from the collection system and tubing back toward the device before internal failure is assumed. Maintain alternate airway clearance, verify the external vacuum path, measure performance correctly, and escalate when the VOCSN cannot meet checkout requirements.
That is successful troubleshooting.