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What This Guide Helps With
Troubleshooting bladder not detected, poor scan confidence, unclear bladder outline, or inconsistent bladder volume readings on a PadScan HD Series scanner.
Step-by-Step Troubleshooting
Ensure Patient Safety First
Do not continue repeated scanning if it delays needed clinical care.
Action:
- Confirm the patient is stable and that clinical staff are aware the scan result is unreliable.
- If urinary retention is strongly suspected and the scanner cannot provide a reliable result, advise clinical staff to use an alternate assessment method or another bladder scanner.
Expected outcome: Patient care decisions are not based on a low-confidence or failed scan result.
Why it matters: A bladder scanner is a decision-support device. Inaccurate or failed scans can delay catheterization, urinary retention evaluation, or other care.
Verify the Reported Problem
Confirm exactly what clinical staff are seeing.
Action:
- Ask whether the issue is bladder not detected.
- Ask whether the issue is a low-confidence scan result.
- Ask whether the issue is repeated low volume despite symptoms.
- Ask whether the issue is unstable or inconsistent volume readings.
- Ask whether the issue is poor image quality.
- Ask whether the scan failure occurs only on certain patients.
- Ask whether the scan failure started after cleaning, charging, or software startup.
Expected outcome: The failure pattern is identified before assuming a device fault.
If the issue was caused by incorrect scan technique or a one-time patient positioning problem, correct the process and stop.
Confirm the Scanner Powers On Normally
Check the basic operating condition of the PadScan HD unit.
Action:
- Power the scanner on.
- Confirm the display starts normally and there are no system errors, startup freezes, battery warnings, or probe recognition messages.
Expected outcome: The scanner reaches the normal scanning screen without errors.
If the scanner does not start normally, troubleshoot the power, battery, or startup issue first.
Check Battery Charge and Power Status
Low battery or unstable power can affect device behavior.
Action:
- Confirm the battery has adequate charge.
- Place the scanner on its charger or connect approved power if available.
- Allow the unit to charge if the battery is low.
- Repeat the scan after stable power is confirmed.
Expected outcome: The scanner operates normally without low-battery warnings.
If the issue resolves after charging, document the battery condition and return the device to service after confirming repeat scans are reliable.
Inspect the Probe and Cable
The probe is a common external source of poor image quality or failed detection.
Action:
- Inspect the probe face for cracks, residue, dried gel, scratches, impact damage, or contamination.
- Check the probe cable for kinks, cuts, strain, loose connection, or damage near the connector.
- Confirm the probe is fully seated if the model uses a removable probe connection.
Expected outcome: The probe and cable appear clean, intact, and properly connected.
If damage is found, remove the scanner from service and send it for repair or probe evaluation.
Clean the Probe Surface
Residue on the probe can interfere with ultrasound transmission.
Action:
- Clean the probe face according to facility-approved cleaning procedures.
- Remove dried gel, disinfectant residue, lint, or buildup from the scanning surface.
- Dry the probe as required before reuse.
Expected outcome: The probe face is clean and smooth before scanning.
If cleaning restores reliable bladder detection, document the cleaning performed and return the device to service.
Verify Proper Ultrasound Gel Use
Insufficient gel can cause poor acoustic coupling and low-confidence scans.
Action:
- Confirm that enough approved ultrasound gel is used between the probe and the patient.
- Make sure the gel is not dried out, contaminated, or applied too thinly.
- Repeat the scan with fresh gel.
Expected outcome: The scan image improves and the bladder is detected more reliably.
If the issue resolves, the cause was likely poor probe-to-skin coupling.
Confirm Patient Positioning and Scan Location
Incorrect probe placement can cause the scanner to miss the bladder.
Action:
- Confirm the patient is positioned appropriately, usually supine or as clinically appropriate.
- Place the probe in the lower abdomen above the pubic bone.
- Aim the probe toward the bladder, not straight down at the abdomen.
- Avoid scanning too high, too lateral, or over clothing, dressings, pads, or excess bedding.
Expected outcome: The scanner detects the bladder with improved confidence.
If repositioning resolves the issue, document scan technique correction.
Check for Patient-Specific Factors
Some patients are harder to scan accurately.
Action:
- Ask clinical staff if the patient has obesity or large abdominal tissue depth.
- Ask clinical staff if the patient has abdominal wounds, dressings, or surgical sites.
- Ask clinical staff if the patient is pregnant.
- Ask clinical staff if the patient has ascites or abdominal fluid.
- Ask clinical staff if the patient has a pelvic mass.
- Ask clinical staff if the patient had recent bladder surgery.
- Ask clinical staff if the patient has a urinary catheter in place.
- Ask clinical staff if the patient has very low bladder volume.
- Ask clinical staff if the patient is unable to lie still.
Expected outcome: Possible patient-related causes are identified.
If the issue occurs only on difficult-to-scan patients, the scanner may be functioning normally but producing limited results due to clinical conditions.
Repeat the Scan Using a Controlled Technique
A single scan may not be enough to judge the device.
Action:
- Perform multiple scans using correct placement, adequate gel, and steady probe pressure.
- Compare whether the bladder outline and volume are consistent.
- Do not press excessively, as this may distort anatomy or patient comfort.
Expected outcome: Repeated scans produce similar results with acceptable confidence.
If repeat scans are consistent and clinically reasonable, the scanner may be functioning properly.
Compare Against Another Known-Good Scanner if Available
Comparison helps separate device failure from patient or technique issues.
Action:
- Scan the same patient or a test scenario with another known-good bladder scanner if available.
- Compare detection confidence and volume trend.
Expected outcome: Both scanners produce similar general results.
If the PadScan HD repeatedly fails while another scanner works reliably under the same conditions, suspect a PadScan probe, calibration, software, or internal imaging issue.
Check Settings, Patient Mode, and Scan Type
Incorrect settings can affect scan confidence or volume calculation.
Action:
- Confirm the correct patient type, scan mode, or gender-related setting is selected if applicable to the unit’s workflow.
- Check whether the scanner is in the expected bladder scan mode and not a demo, training, or alternate mode.
Expected outcome: The scanner is configured correctly for the patient and exam type.
If correcting the setting resolves the issue, document the incorrect setting and return the scanner to service after confirming operation.
Restart the Scanner
Temporary software faults can cause low-confidence results or scan failure.
Action:
- Power the scanner off.
- Wait briefly.
- Power it back on and allow it to fully restart.
- Repeat the scan using proper gel and placement.
Expected outcome: The scanner resumes normal detection and scan confidence.
If restart resolves the issue, monitor for recurrence and document the behavior.
Check for Error Messages or Abnormal Indicators
The scanner may show warnings that point toward the cause.
Action:
- Look for probe not recognized messages.
- Look for system error messages.
- Look for battery warnings.
- Look for scan failure messages.
- Look for a frozen screen.
- Look for unusual startup behavior.
- Look for touchscreen or button response issues.
Expected outcome: Any displayed error or abnormal condition is recorded.
If error messages persist after restart and external checks, remove the device from service.
Evaluate Whether the Problem Is Repeatable
Repeatability determines whether the device can safely remain in use.
Action:
- Test the scanner with proper technique on more than one appropriate patient or approved test method if available.
- Confirm whether low-confidence scans happen every time or only under certain conditions.
Expected outcome: The failure pattern is clear.
If the issue is repeatable despite proper technique, adequate gel, clean probe surface, stable battery, and correct settings, remove the device from service.
If the Problem Persists
If bladder detection remains unreliable after checking patient safety, battery status, probe condition, gel use, patient positioning, scan location, settings, restart behavior, and comparison with another scanner, common external causes have been ruled out.
The issue may involve the probe, imaging hardware, calibration, software, or internal system electronics.
The device should be removed from service, labeled Out of Service, and sent for repair, bench evaluation, or vendor service.
Knowing when to stop is proper troubleshooting. A bladder scanner that repeatedly gives low-confidence or no-detection results should not be trusted for patient care decisions.
Clinical Use Tip
Do not troubleshoot repeated low-confidence scans while clinical staff are waiting on a critical patient care decision. Move the patient to another bladder scanner or alternate clinical assessment first, then evaluate the device when it is safe to remove from use. Therapy continuity and patient care decisions should come before device troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported that the Caresono PadScan HD Series bladder scanner repeatedly displayed low-confidence scans and did not reliably detect the bladder."
Cause
What was observed during troubleshooting.
Example:
"Found adequate battery charge, clean probe surface, proper gel use, and correct scan technique, but the scanner continued producing inconsistent bladder detection compared with another unit."
Resolution
What action was taken.
Example:
"Removed the PadScan HD Series scanner from service, labeled it Out of Service, and sent it for bench evaluation/probe and imaging system assessment."
Helpful Details to Include (If Known)
- Alarm behavior or scan failure message
- Accessories swapped, including probe, charger, cable, or gel if applicable
- Power behavior, battery charge level, charger status, and startup behavior
- Environmental factors such as scanning over bedding, dressings, pads, or difficult patient positioning
- Indicator lights, display warnings, frozen screen behavior, or probe recognition messages
- Final device status, including whether the scanner was returned to service or labeled Out of Service
Final Thought
Bladder scanner troubleshooting should stay focused on safety, technique, coupling, probe condition, and repeatability. Low-confidence scans are often caused by placement, gel, patient factors, or probe contamination, but a repeatable failure after those checks should be escalated. Clear CCR documentation protects patient care and helps repair teams identify whether the problem is probe-related, software-related, or internal.
That is successful troubleshooting.