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What This Guide Helps With
Repeated sample-detection failures caused by strip condition, sample application, contamination, technique, environmental conditions, or meter-side strip-port problems.
Step-by-Step Troubleshooting
1. Protect Patient Care and Confirm the Reported Condition
If glucose information is needed for immediate clinical decisions, have clinical staff use another verified meter or approved laboratory method while the affected StatStrip is evaluated.
Confirm exactly what occurred, including whether the meter repeatedly failed to detect the sample, reported insufficient sample, or failed only with certain strips or users.
Expected outcome: Patient testing continues safely and the exact failure pattern is identified.
If the problem cannot be reproduced and the meter completes a valid test with approved controls or test materials as required by facility procedure, troubleshooting may stop after final verification.
2. Inspect the Test Strip
Verify that the strip is the correct type for the StatStrip system and is not visibly damaged, bent, contaminated, wet, or improperly stored.
Check the strip container and handling conditions according to facility and manufacturer requirements. Do not use questionable strips for troubleshooting.
Expected outcome: A clean, undamaged, properly stored strip is available for testing.
If replacing the suspect strip resolves the problem and functional verification passes, troubleshooting can stop.
3. Inspect Sample Application Conditions
Observe whether the sample is being presented correctly to the strip without touching or contaminating the application area.
Verify that sufficient sample is available and that the sample is not being partially applied and then reapplied after a delay.
Clinical Engineering should evaluate whether the reported failure follows one particular collection method, accessory, or workflow rather than assuming a meter failure.
Expected outcome: Proper sample presentation results in normal sample detection.
If proper application resolves the repeated failure, troubleshooting can stop after verification.
4. Check the Strip Port Externally
Power down the meter if appropriate and inspect the strip port for visible blood, cleaning residue, debris, corrosion, bent material, foreign objects, or physical damage.
Do not insert tools into the strip port or perform deep cleaning beyond approved external procedures.
Expected outcome: The strip port is visibly clean, dry, unobstructed, and undamaged.
If approved external cleaning resolves the problem and the meter passes verification testing, troubleshooting can stop.
5. Try a Known-Good Strip Supply
Using strips confirmed to be acceptable and properly stored, repeat the test under controlled conditions.
If multiple meters are available, compare the suspect strip supply with another functioning StatStrip meter without mixing questionable consumables into clinical inventory.
Expected outcome: Known-good strips are consistently recognized and accept the sample.
If the meter works reliably with known-good strips, isolate and remove the suspect strip supply from use according to facility procedure.
6. Check Environmental and Handling Conditions
Confirm that the meter and strips have not recently been exposed to excessive moisture, condensation, temperature extremes, liquid intrusion, or a rapid environmental change.
Allow equipment and consumables to stabilize within approved operating conditions when applicable.
Expected outcome: The meter and strips are dry, stable, and operating in an appropriate environment.
If the failure disappears after environmental conditions are corrected and verification passes, troubleshooting can stop.
7. Perform Approved Control or Functional Testing
Use the facility-approved quality-control or functional verification process to determine whether the meter consistently detects an approved test sample.
Do not substitute an unapproved material or bypass normal meter safeguards.
Expected outcome: The meter completes repeated control or verification tests without sample-detection errors.
If testing is consistently successful, document the findings and return the meter to service according to facility policy.
8. Compare With Another Meter
When available, test the same approved control material using another known-good StatStrip meter.
This helps distinguish a meter-specific problem from strip, control-material, handling, or environmental issues.
Expected outcome: The comparison establishes whether the failure follows the suspect meter or the external materials.
If the problem follows the consumable or test material rather than the meter, correct that external cause and stop after verification.
9. Perform Final Functional Verification
After any corrective action, perform multiple appropriate tests as permitted by facility procedure to confirm consistent strip recognition and sample detection.
Inspect the display and strip port one final time.
Expected outcome: The StatStrip consistently accepts strips, detects samples, and completes testing normally.
If successful, the device may be returned to service following normal documentation requirements.
10. Remove From Service if Failures Continue
If properly stored known-good strips, correct application, approved controls, and a clean undamaged strip port do not resolve the problem, stop external troubleshooting.
Expected outcome: An unreliable meter is prevented from returning to clinical use.
If the Problem Persists
Common external causes have been ruled out. Remaining possibilities include an internal strip-detection problem, damaged strip-port components, contamination beyond approved external cleaning limits, or another service-level electronic fault.
The meter should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench evaluation.
- Evaluated using appropriate Nova Biomedical documentation and approved test equipment.
- Repaired or configured only by qualified personnel.
- Fully functionally verified before return to service.
Knowing when to stop external troubleshooting rather than repeatedly testing an unreliable glucose meter is proper troubleshooting.
Clinical Use Tip
Provide another verified glucose-testing method whenever repeated sample errors could delay a treatment decision.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Nursing reported that the StatStrip repeatedly failed to detect blood samples and required multiple test attempts."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found dried contamination around the external strip-port opening that interfered with consistent strip and sample detection."
Resolution
What action was taken.
Example:
"The meter was cleaned using the approved external procedure and successfully completed repeated control testing with known-good strips before return to service."
Helpful Details to Include (If Known)
- Exact displayed message
- Strip lot or supply involved
- Sample type and collection method
- Whether multiple operators experienced the issue
- Known-good strip substitution results
- Strip-port condition
- Cleaning or liquid exposure history
- Control-test results
- Comparison-meter results
- Final device status
Final Thought
Protect patient care first, verify strips and sample application before assuming meter failure, use controlled comparisons, and escalate when reliable sample detection cannot be demonstrated. Clear CCR documentation should show exactly what was found and verified.
That is successful troubleshooting.