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Manufacturer
Model
What This Guide Helps With
Troubleshooting blurred, distorted, upside-down, or reversed video caused by blade seating, lens contamination, display position, or device damage.
Step-by-Step Troubleshooting
Ensure Patient Safety First
If the King Vision aBlade is being used during an active airway attempt, do not continue troubleshooting while patient care is delayed.
Have clinical staff move to an alternate airway device or backup video laryngoscope if the image is not immediately usable.
Expected outcome: The patient is not dependent on a laryngoscope with an unreliable image.
Confirm the Reported Image Problem
Power on the display and confirm whether the issue is:
- Blurry image
- Fogged or obscured image
- Dark or distorted image
- Image appears reversed
- Image orientation changes when the handle or display is moved
Expected outcome: The exact video issue is identified before parts are swapped.
Check the aBlade for Lens Obstruction
Inspect the distal camera window on the disposable aBlade.
Look for:
- Protective film left in place
- Packaging residue
- Fluid, blood, secretions, or cleaning residue
- Scratches, cracks, or clouding on the camera window
If contamination is present, replace the disposable aBlade. Do not attempt to reuse a compromised disposable blade.
Expected outcome: A clean, undamaged blade produces a clear image. If resolved, stop.
Verify the Blade Is Fully Seated
Remove and reinstall the aBlade onto the display/handle assembly.
Confirm it locks into place evenly and does not feel loose, tilted, or partially engaged.
Expected outcome: A properly seated blade provides a stable, correctly oriented image. If resolved, stop.
Try a Known-Good Disposable aBlade
Install a new, unopened, compatible King Vision aBlade.
This helps separate a blade-related camera issue from a display or handle issue.
Expected outcome: If the new blade produces a clear, correctly oriented image, the original blade was defective, contaminated, or damaged. Remove the bad blade from use and stop.
Check Display Position and Viewing Angle
Confirm the image is not being interpreted as reversed because the display is rotated, viewed from an unusual angle, or held in an incorrect orientation.
Reposition the display and compare the image to expected camera direction.
Expected outcome: The displayed image should match expected blade movement and orientation.
Inspect the Display/Handle Connection Area
Check the connector area where the blade interfaces with the reusable display.
Look for:
- Debris
- Bent or damaged contacts
- Moisture
- Cracked plastic
- Loose fit between blade and display
Do not scrape contacts aggressively or disassemble the unit.
Expected outcome: The connector area is clean, dry, intact, and allows the blade to seat correctly.
Power Cycle the Device
Turn the display off, wait briefly, and power it back on with a known-good blade installed.
Expected outcome: The image initializes normally. If the image returns to normal, document the event and verify repeat operation before returning to service.
Check Battery Condition
If the image is dim, unstable, delayed, or intermittently distorted, verify the battery condition or replace the battery if applicable to the device configuration.
Low power can contribute to unreliable display behavior.
Expected outcome: The display remains stable with adequate power.
Inspect for Physical Damage
Examine the display, hinge area, housing, screen, and blade interface for evidence of drops, impact, cracking, liquid intrusion, or loose components.
Expected outcome: No visible damage is present. If damage is found, remove the unit from service.
Perform a Functional Check With Multiple Known-Good Blades
Test the display with at least one additional known-good compatible blade if available.
If blurred or reversed video occurs with multiple blades, the issue is likely with the reusable display/handle assembly.
Expected outcome: The device consistently produces a clear, correctly oriented image before return to service.
If the Problem Persists
If the image remains blurred, distorted, reversed, or unstable after checking the blade, lens, seating, battery, display orientation, and connector area, common external causes have been ruled out.
Remove the King Vision display from service, label it Out of Service, and send it for repair, replacement evaluation, or vendor-supported bench assessment.
Knowing when to stop is proper troubleshooting. A video laryngoscope with unreliable image quality should not be returned to clinical use.
Clinical Use Tip
Do not troubleshoot a poor video image during an active airway attempt beyond basic immediate checks. Patient airway management comes first. Provide clinical staff with an alternate laryngoscope or backup airway device before continuing Clinical Engineering evaluation.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported the Ambu King Vision aBlade image was blurry and appeared reversed during pre-use check."
Cause
What was observed during troubleshooting.
Example:
"Found disposable aBlade camera window contaminated and blade not fully seated on the display assembly."
Resolution
What action was taken.
Example:
"Replaced the aBlade, reseated the connection, verified clear and correctly oriented video image, and returned the display to service."
Helpful Details to Include (If Known)
- Blade type used
- Whether a new disposable blade was tested
- Lens condition
- Blade seating condition
- Display orientation concern
- Battery status
- Connector condition
- Any signs of fluid intrusion or impact damage
- Whether the issue followed the blade or stayed with the display
- Final device status
Final Thought
Blurred or reversed video on a King Vision aBlade should be approached logically: protect the patient first, check the disposable blade and lens, confirm proper seating, verify power and display behavior, then escalate if the reusable display remains unreliable. Clear documentation helps distinguish blade defects from true device failure.
That is successful troubleshooting.