Baxter PrismaFlex

Asset Type

Continuous Renal Replacement Therapy (CRRT)

Manufacturer

Baxter

Model

PrismaFlex

What This Guide Helps With

This guide helps troubleshoot the Pressures Circuit Board alarm on the Baxter PrismaFlex when the device detects a pressure-sensing hardware failure. This condition can affect monitoring of access, return, filter, effluent, and circuit pressures during CRRT therapy.

Because PrismaFlex pressure monitoring is critical for detecting occlusions, access problems, return-line problems, abnormal circuit pressure, and pressure pod issues, this alarm should be treated as a patient-safety condition until the device is evaluated and verified safe for use.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Immediately treat this alarm as a patient-safety condition because pressure monitoring may not be reliable.
• Stop use according to clinical procedure and notify the care team.
• If CRRT must continue, make sure the patient is supported by an alternate device or therapy plan.
• Follow the displayed operator instructions. Turn off the machine when directed, remove the return line from the return-line clamp, and return blood only if clinically appropriate and permitted by policy.
• Do not continue therapy on a PrismaFlex with an unresolved pressure-monitoring hardware alarm.

Verify the Reported Alarm and Behavior

• Confirm the exact alarm displayed is Alarm: Pressures Circuit Board.
• Document whether the alarm occurred at startup, during treatment setup, during priming, during active CRRT therapy, or intermittently after movement or pressure pod repositioning.
• Check whether other pressure-related alarms are also present, such as access, return, filter, effluent, or pressure pod alarms.
• Confirm whether the alarm is reproducible after the device has been removed from patient use.

Remove the Device From Active Clinical Use

• If the alarm occurred during therapy, confirm with nursing or clinical staff that treatment was stopped safely.
• Confirm that blood return was handled according to facility procedure, if applicable.
• Do not attempt to keep the machine in service while the alarm remains active.
• Mark the PrismaFlex for Clinical Engineering evaluation.

Check External and Simple Causes First

• Inspect the pressure pods and pressure pod connection areas.
• Confirm the pressure pods are properly seated, not cracked, not contaminated, and not visibly damaged.
• Check that the circuit is installed correctly.
• Inspect the pressure pod areas for residue, moisture, debris, or improper seating.
• Correct any visible setup issue before repeating safe non-patient testing.

Inspect the Exterior Condition of the Device

• Look for visible damage around the front panel, pressure pod interface area, clamps, display, and cartridge loading area.
• Check for signs of fluid intrusion, cleaning solution residue, cracked plastic, impact damage, corrosion, or contamination.
• If fluid intrusion or physical damage is found, stop troubleshooting and escalate the device for repair evaluation.

Power Cycle Only When Safe and Appropriate

• With the PrismaFlex removed from patient use, power the machine down and restart it only if allowed by facility procedure.
• Observe whether the Pressures Circuit Board alarm returns during startup, setup, or pressure pod checks.
• Document whether the alarm clears temporarily, returns immediately, or returns consistently during the same part of the startup or setup sequence.

Check Pressure Sensor Function in Diagnostics

• Access the appropriate service or diagnostic function for pressure sensor evaluation.
• Use the Diagnose Screen – Pressure Pod Reposition check to evaluate pressure sensor function.
• Observe whether the pressure sensors respond normally and whether the system recognizes pressure pod repositioning as expected.
• Record any abnormal, unstable, missing, or failed pressure sensor response.

Isolate the Likely Failure

• If pressure pods, circuit setup, exterior condition, and restart checks do not resolve the alarm, treat the condition as device-related.
• The likely failure area is the pressure-sensing hardware path, especially the pressures circuit board.
• Do not keep repeating clinical setup attempts once external and user-accessible causes have been ruled out.

Stop When Resolved

• If the alarm clears after correcting pressure pod seating, removing contamination, correcting setup, or restarting the device, complete a full operational verification before return to service.
• Confirm that pressure readings behave normally.
• Confirm the alarm does not return during setup checks.
• Return the device to service only after required testing passes and the machine is safe for patient use.

If the Problem Persists

If the Pressures Circuit Board alarm remains active after external checks, pressure pod inspection, restart, and diagnostic pressure sensor evaluation, remove the PrismaFlex from service.

At this point, external causes have been ruled out, including pressure pod seating, circuit setup, visible contamination, exterior damage, and simple restart-related conditions.

Label the device Out of Service and send it for repair or bench evaluation.

A persistent Pressures Circuit Board alarm strongly indicates internal pressure-sensing hardware failure. Replacement of the pressures circuit board may be required if malfunction is confirmed.

Clinical Use Tip

Never troubleshoot this alarm on an active patient unless the immediate goal is safe therapy discontinuation. Move the patient to a backup PrismaFlex or alternate CRRT therapy plan before technical evaluation. A CRRT machine with unresolved pressure-monitoring hardware failure should not be trusted for treatment.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"PrismaFlex reported Alarm: Pressures Circuit Board during CRRT setup. Staff reported the machine instructed shutdown and service call due to pressure circuit board hardware failure."

Cause

What was observed during troubleshooting.

Example:
"Pressure pods and external setup were inspected. Alarm persisted after basic checks. Diagnostic pressure sensor evaluation indicated likely malfunction in the pressure-sensing hardware path."

Resolution

What action was taken.

Example:
"Removed PrismaFlex from service, labeled Out of Service, and sent for bench evaluation. Pressures circuit board replacement required if malfunction is confirmed. Device not returned to service pending repair and verification."

Helpful Details to Include (If Known)

• Alarm behavior
• Accessories swapped
• Power behavior
• Environmental factors
• Indicator lights
• Final device status

Final Thought

The Pressures Circuit Board alarm should be treated as a serious pressure-monitoring hardware condition. Clinical Engineering should confirm the alarm, rule out external setup and pod issues, verify pressure sensor behavior through diagnostics, and escalate to repair when the fault persists. Patient safety and clear CCR documentation are the priority.

That is successful troubleshooting.