Terumo Sarns 7400
Terumo · Model Sarns 7400
Heart-Lung Bypass Unit Complete Open Heart System with Pulsatile
Key tips
- ·Never defeat or bypass a return-electrode monitoring (REM) alarm to finish a case - it's a direct burn risk.
- ·Verify OR table battery backup - a table that loses power mid-procedure is a real, documented incident type.
- ·Track surgical light lamp-hours rather than waiting for failure - a sudden failure mid-case is avoidable.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Oxygenator / heat exchanger fault
HighSymptoms: Poor gas exchange or temperature control.
Root cause: Oxygenator membrane fouling or heat-exchanger leak.
Roller / centrifugal pump head wear
HighSymptoms: Inaccurate flow, unusual noise from the pump head.
Root cause: Raceway wear or centrifugal rotor bearing wear.
Level / bubble sensor fault
HighSymptoms: False or missed air-in-line/level alarm.
Root cause: Ultrasonic sensor drift or dirty optics.
Console display / control fault
MediumSymptoms: Console freeze or loss of readouts mid-case.
Root cause: Main control board or display module fault.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Console main board
Class Major service partRel. cost $$$$R&R Expert-level
Pump head / raceway
Sterilizable disposable raceway; console head inspected at PM.
Class Major service partRel. cost $$$$R&R Difficult
Oxygenator (disposable)
Single-use per case.
Class ConsumableRel. cost $$$$R&R Fairly easy
Level / bubble sensor
Safety-critical; verify at PM.
Class Major service partRel. cost $$$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Console main board | Major service part | $$$$ | Expert-level |
| Pump head / raceway Sterilizable disposable raceway; console head inspected at PM. | Major service part | $$$$ | Difficult |
| Oxygenator (disposable) Single-use per case. | Consumable | $$$$ | Fairly easy |
| Level / bubble sensor Safety-critical; verify at PM. | Major service part | $$$ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Pre-case functional check
- ·Electrosurgical return-electrode cable inspection
- ·Table hydraulic / mechanical inspection
- ·Annual electrical safety test and full PM
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Oxygenator / heat exchanger fault
- Confirm the presentation - typically poor gas exchange or temperature control - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: oxygenator membrane fouling or heat-exchanger leak.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the pump head / raceway per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Roller / centrifugal pump head wear
- Confirm the presentation - typically inaccurate flow, unusual noise from the pump head - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: raceway wear or centrifugal rotor bearing wear.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the oxygenator (disposable) per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Technical Specs
- Height
- 26.5 in
- Length
- 19.5 in
- Weight
- 57 lbs
- Width
- 9 in
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Operating rooms
- Procedure rooms
- Interventional suites
Documents & Manuals
No documents available for this device yet.
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