Stryker S3 Hopital Bed

Asset Type

Hospital Bed

Manufacturer

Stryker

Model

S3

What This Guide Helps With

This guide addresses situations where the Stryker S3 bed:

• Does not trigger the bed exit alarm when a patient attempts to get up
• Triggers false bed exit alarms
• Displays bed exit alarm error indicators
• Shows inconsistent alarm sensitivity

This guide focuses on external setup, configuration, and sensor-related checks before assuming internal sensor mat or control board failure.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• If the alarm reliability is in question, move the patient to a safe, functioning bed.
• Implement alternative fall precautions per facility protocol.
• Do not perform troubleshooting while the bed is actively supporting a patient.

Verify the Bed Exit Alarm Is Enabled

• Confirm the bed exit alarm is turned ON at the control panel.
• Check which sensitivity level is selected (e.g., low, medium, high).
• Ensure the alarm is properly armed after patient positioning.

Why this matters: Many “failures” are simply unarmed alarms or incorrect sensitivity settings.

Confirm Proper Patient Positioning

• Ensure the patient is centered on the mattress.
• Verify the patient weight meets the detection threshold.
• Confirm linens are not excessively layered under the patient.

Why this matters: The S3 uses pressure redistribution sensing. Off-center positioning or low weight may prevent proper detection.

Inspect Mattress and Surface Compatibility

• Confirm the mattress is the correct Stryker-approved surface for the S3.
• Verify no overlays or air surfaces have been added that could interfere.
• Remove any unauthorized pressure-relief pads temporarily to test alarm function.

Why this matters: Aftermarket or incompatible surfaces can prevent proper pressure sensing.

Check for Obstructions or Improper Mattress Installation

• Lift and reseat the mattress.
• Confirm the mattress is fully seated within the frame.
• Inspect for folded linens or objects between mattress and frame.

Why this matters: Improper seating can affect pressure sensor accuracy.

Power Cycle the Bed

• Disconnect AC power.
• If equipped, disconnect battery briefly (if accessible externally).
• Reconnect power and allow full reboot.
• Re-arm the bed exit alarm and retest.

Why this matters: Software or logic lockups can affect alarm processing.

Inspect Control Panel and Indicators

• Check for error codes on the display.
• Observe for intermittent alarm activation without patient movement.
• Confirm speaker function (audio not muted or failed).
• If available, test alarm volume adjustment.

Check Bed Frame and Sensor Wiring (External Only)

• Inspect visible harness connections under the sleep deck (no disassembly).
• Look for pinched or damaged wiring.
• Check for recent maintenance that may have disturbed connections.
• Do not open control boards or remove deck panels beyond normal inspection.

Functional Test (Without Patient)

• With mattress installed, apply distributed pressure manually.
• Arm the bed exit alarm.
• Gradually remove pressure and confirm alarm activation.
• Repeat test at different sensitivity levels.
• Do not test while the bed is actively supporting a patient.

If the Problem Persists

If the alarm:

• Fails to detect pressure changes
• Triggers false alarms despite proper setup
• Shows repeated internal error codes

Then common external causes have been ruled out.

At this point, the issue is likely:

• Internal pressure sensor mat failure
• Control board malfunction
• Internal wiring fault

The bed should be:

• Removed from service
• Labeled Out of Service
• Sent for controlled repair or bench evaluation

Knowing when to stop is proper troubleshooting. Avoid unnecessary internal disassembly in clinical areas.

Clinical Use Tip

Never troubleshoot bed exit alarms on an active patient.

If alarm reliability is in question:

• Move the patient to a safe, functioning bed first.
• Ensure alternative fall precautions are in place.
• Only test alarm function when the bed is unoccupied.

Patient fall prevention is a safety-critical function.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
“Nursing reports bed exit alarm does not trigger when patient attempts to stand.”

Cause

What was observed during troubleshooting.

Example:
“Mattress improperly seated in frame causing inconsistent pressure sensing.”

Resolution

What action was taken.

Example:
“Reseated mattress, verified proper positioning, tested alarm at all sensitivity levels. Alarm functioning normally after correction.”

Helpful Details to Include

• Alarm sensitivity level
• Mattress type installed
• Any overlays present
• Indicator light behavior
• Speaker function
• Power cycle performed
• Final functional test results
• Final device status (Returned to Service or Sent to Repair)

Final Thought

Bed exit alarms are directly tied to fall prevention and patient safety. Logical troubleshooting starts with configuration, positioning, and surface compatibility before assuming internal failure. When external causes are ruled out, escalation protects both patients and equipment. Thorough documentation ensures continuity of care and technical accountability.

That is successful troubleshooting.