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What This Guide Helps With
Addresses failed exposure-control activation caused by loose connections, damaged cables, control selection, contamination, physical damage, or system readiness conditions.
Step-by-Step Troubleshooting
1. Protect the Patient and Prevent Uncontrolled Imaging
If an exposure control does not function reliably during a procedure, stop depending on that control. Provide another approved exposure method or verified imaging system if clinically required.
If a switch sticks, activates intermittently, or could cause unintended radiation, immediately remove it from use.
Expected outcome: No patient or staff member is exposed to unreliable or unintended radiation activation.
2. Confirm Which Control and Function Are Affected
Determine whether the problem involves:
- Footswitch only.
- Hand switch only.
- One pedal or button.
- Fluoroscopy only.
- Other exposure functions.
- Both footswitch and hand switch.
Confirm whether the system otherwise indicates X-ray ready.
Expected outcome: The problem is isolated to a specific control, function, or broader imaging issue.
3. Inspect the Control Externally
Examine the footswitch or hand switch for:
- Cracks.
- Liquid contamination.
- Debris.
- Damaged housing.
- Sticking controls.
- Frayed or crushed cable.
- Damaged strain relief.
- Bent or damaged connector hardware.
Do not open the switch housing unless specifically authorized by applicable service documentation.
Expected outcome: The control is physically intact and suitable for further testing. Damaged or contaminated controls are removed from service.
4. Verify the Connector Is Fully Seated
Trace the control cable to its system connection and verify it is correctly inserted and secured.
Look for a connector disturbed by transport, cable tension, equipment movement, or cleaning.
Disconnect and reconnect only accessible connectors using the appropriate powered-down condition when required.
Expected outcome: The system recognizes a securely connected exposure control. If operation returns, continue to verification.
5. Check Cable Routing and Position
Verify the switch cable is not:
- Trapped under a wheel.
- Stretched by C-arm movement.
- Pinched by equipment.
- Wrapped tightly around the cart.
- Subjected to repeated bending at the strain relief.
Reposition the cable to remove mechanical stress.
Expected outcome: The control operates without cable-position-dependent interruption.
6. Compare With Another Approved Exposure Control
If available, test the alternate approved exposure control.
Examples include comparing the footswitch response with the hand switch or using an approved known-good compatible control.
Do not substitute an unapproved accessory.
Expected outcome: If the alternate control works normally, the original external switch or cable is strongly isolated as the cause. Troubleshooting may stop after replacement and verification.
7. Verify System Readiness and Mode
If neither control works, confirm the Cios Spin is fully initialized, the detector is ready, no exposure-inhibit condition is active, and the selected workflow permits imaging.
A system-level inhibit can appear to be a failed switch.
Expected outcome: The system is ready to accept an exposure command.
8. Perform a Controlled Restart if Needed
If controls are intact and connected but appear unrecognized after a software or communication interruption, perform one controlled restart.
Recheck recognition after normal initialization.
Expected outcome: Exposure controls are recognized and respond normally after restart.
9. Verify Activation and Release
Using approved radiation-safety practices and a suitable test object, verify:
- The intended control initiates fluoroscopy or exposure.
- Activation occurs only when commanded.
- Exposure terminates immediately when the control is released.
- Each intended pedal or button performs its expected function.
- No intermittent response occurs when the cable is positioned normally.
Expected outcome: The exposure control operates consistently and safely. Troubleshooting can stop.
10. Escalate Unresolved Control Problems
If known-good external controls also fail or exposure-control recognition remains unreliable, remove the C-arm from service.
Do not bypass the switch, short connector contacts, or defeat radiation-control circuitry.
Expected outcome: An unreliable radiation-control system is prevented from clinical use.
If the Problem Persists
After accessible connectors, control condition, cable routing, known-good substitutions, system readiness, and restart have been ruled out, the cause may involve internal exposure-control interfaces, communication hardware, safety circuitry, configuration, or another service-level condition.
The Cios Spin should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench/service evaluation.
- Evaluated with Siemens Healthineers documentation and approved test equipment.
- Repaired or configured only by qualified personnel.
Complete exposure-control, radiation-safety, and imaging verification before return to service.
Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
A sticking or intermittent exposure switch is a radiation-safety issue and should be removed from use immediately rather than worked around.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Staff reported the Cios Spin footswitch intermittently failed to start fluoroscopy."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found visible damage at the footswitch cable strain relief and confirmed normal operation with a compatible known-good control."
Resolution
What action was taken.
Example:
"The damaged footswitch was replaced, activation and release were verified through repeated functional testing, and the C-arm was returned to service."
Helpful Details to Include (If Known)
- Footswitch or hand switch affected.
- Specific pedal or button affected.
- Physical condition.
- Connector condition.
- Cable routing.
- Known-good control results.
- Imaging-ready status.
- Any inhibit message.
- Restart results.
- Activation and release verification.
- Final device status.
Final Thought
Treat exposure controls as safety-critical components, eliminate simple connection and accessory causes first, verify both activation and release, and escalate any unresolved or intermittent behavior.
That is successful troubleshooting.