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Asset Type
Sequential Compression Device (SCD)
Manufacturer
Model
What This Guide Helps With
Pressure alarms caused by blocked tubing, leaks, incorrect garments, or connection issues affecting proper inflation and therapy delivery.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the device from active patient use before troubleshooting.
- Expected: Patient placed on alternate DVT prophylaxis.
Verify the Reported Alarm Condition
- Power on the unit and observe the alarm behavior during a cycle.
- Expected: Alarm triggers during inflation or pressure hold phase.
- Why it matters: Confirms true pressure-related fault vs user misunderstanding.
Check Sleeve (Garment) Connection
- Ensure tubing is fully inserted into the pump port. Disconnect and reconnect firmly.
- Expected: Secure connection with no looseness.
- Why it matters: Loose connections are the most common cause of pressure alarms.
- If corrected and alarm clears → stop troubleshooting.
Inspect Sleeve and Tubing for Leaks or Damage
- Check entire length of tubing and garment for holes, tears, or disconnections.
- Listen for escaping air during inflation.
- Expected: No audible leaks or visible damage.
- Why it matters: Air leaks prevent pressure buildup and trigger alarms.
- If damaged → replace garment and retest.
Check for Kinks or Obstructions in Tubing
- Inspect tubing for sharp bends, compression under bed rails, or pinching.
- Expected: Tubing is straight and unobstructed.
- Why it matters: Restricted airflow can mimic pressure failure conditions.
- If corrected and alarm clears → stop troubleshooting.
Verify Correct Garment Type and Size
- Ensure compatible Flowtron sleeves are being used and properly sized for the patient.
- Expected: Properly fitted, manufacturer-approved garment.
- Why it matters: Incorrect or incompatible sleeves affect pressure regulation.
- If corrected → retest and confirm normal operation.
Test Alternate Sleeve (Known Good)
- Replace with a known-good sleeve and tubing set.
- Expected: Normal inflation cycle without alarms.
- Why it matters: Quickly isolates accessory vs device issue.
- If alarm resolves → original sleeve is faulty.
Inspect Pump Ports for Debris or Damage
- Check air outlet ports for blockage, dust, or damage.
- Expected: Clean, unobstructed ports.
- Why it matters: Blocked ports can prevent accurate pressure delivery.
Perform Power Cycle
- Turn the unit off, wait 10 seconds, then restart.
- Expected: System resets and alarm may clear.
- Why it matters: Clears transient faults or sensor misreads.
If the Problem Persists
If all external causes have been ruled out, the issue is likely internal (pressure sensor, internal pump, or control board).
Remove the device from service, label it Out of Service, and send for repair or bench evaluation.
Clinical Use Tip
Do not troubleshoot pressure alarms while the device is connected to a patient. Always transfer the patient to a functioning SCD first.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit alarming for pressure during use; sleeves not inflating properly."
Cause
What was observed during troubleshooting.
Example:
"Leaking sleeve tubing preventing adequate pressure buildup."
Resolution
What action was taken.
Example:
"Replaced sleeve with known-good set; verified normal inflation and no alarms."
Helpful Details to Include (If Known)
- Alarm timing (during inflate or hold)
- Accessories swapped or tested
- Power behavior observed
- Environmental factors (bed position, tubing routing)
- Indicator lights or alarm messages
- Final device status (returned to service or sent for repair)
Final Thought
Pressure alarms are most commonly caused by external airflow issues. A methodical approach—starting with connections, tubing, and garments—ensures patient safety and avoids unnecessary repairs. Recognizing when the issue is internal is just as important as fixing simple problems.
That is successful troubleshooting.