Roche Cobas 8000
Roche · Model Cobas 8000
• Screen sharing with the analyzer software and cobas e-services on a single screen for convenient instrument monitoring. • Traceability information for easy tracking of calibration and reagent information offers more transparency. • User defined fully automated and selective rerun and reflex testing. • Connectivity of up to 3 cobas 8000 modular analyzer series in a single cobas 8000 data manager. • Technical validation of sample result in combination with rule programming improves and accelerates the result release process. • QC management of all connected instruments on a single screen supports flexible integration of local requirements for QC standards and rules (e.g. Levey-Jennings plots and diagrams, Westgard rules,…etc.). • High speed • Intelligent sample dynamics • Intelligent workflow management • Premium quality & safety • Multidimensional modularity
Key tips
- ·Run QC controls before trusting any repair - an analyzer that passes self-test can still report clinically wrong results.
- ·Rule out a reagent lot change before opening the instrument - it can look exactly like a hardware fault.
- ·Centrifuge rotors have a hard retirement age/cycle limit regardless of visible condition - don't eyeball it.
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.
Sample probe / pipette clog
MediumSymptoms: Aspiration error, short sample, carryover.
Root cause: Clot/crystal obstruction.
Centrifuge imbalance / bearing
HighSymptoms: Vibration, loud noise, stop error.
Root cause: Worn bearing or unbalanced rotor.
Reagent / wash flow fault
MediumSymptoms: Clogs, high blank, QC fail.
Root cause: Pump tube wear, air in line.
Optics / lamp degradation
LowSymptoms: Low signal, wavelength drift.
Root cause: Lamp/LED or monochromator aging.
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.
Centrifuge rotor & bearings
Class Major service partRel. cost $$$R&R Difficult
Incubator heater / fan
Class Periodic replacementRel. cost $$R&R Moderate
Sample aspiration probe
Frequent R&R on high-throughput analyzers.
Class Periodic replacementRel. cost $$$R&R Moderate
Peristaltic pump tubing
Consumable - replace proactively.
Class Frequent wear itemRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Centrifuge rotor & bearings | Major service part | $$$ | Difficult |
| Incubator heater / fan | Periodic replacement | $$ | Moderate |
| Sample aspiration probe Frequent R&R on high-throughput analyzers. | Periodic replacement | $$$ | Moderate |
| Peristaltic pump tubing Consumable - replace proactively. | Frequent wear item | $ | Easy |
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.
- ·Daily QC controls run and reviewed
- ·Calibration verification per assay
- ·Routine cleaning and decontamination
- ·Scheduled reagent-path and pump-tubing maintenance
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Sample probe / pipette clog
- Confirm the presentation - typically aspiration error, short sample, carryover - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: clot/crystal obstruction.
- 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 sample aspiration probe 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: Reagent / wash flow fault
- Confirm the presentation - typically clogs, high blank, QC fail - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: pump tube wear, air in line.
- 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 peristaltic pump tubing 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
- Throughput
- 1000 samples/hr
- Sample Volume
- 1.5 to 35 µL
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Central / core laboratory
- Point-of-care testing stations
- Blood bank
- Microbiology lab
Documents & Manuals
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
Potential for Changed Configuration Settings on the cobas 8000 modular analyzer series/cobas pro integrated solutions, may cause incorrect results in several affected parameters. In the case of poor sample quality, discrepant results may remain undetected due to the absence of associated data flags.
- RECALL
AssayTips part of the AssayTip/AssayCup Tray Tips used on the cobas e 801 module- may have an Abnormal Internal Structure and lead to Incorrect patient results
- RECALL
The syringe plunger on the device may be mounted in a tilted position, which applies mechanical stress to the plunger. In the worst case scenario, the plunger may crack leading to impaired syringe function.
- RECALL
A software failure may incorrectly set the system settings to "default" settings, creating a risk of incorrect results.
- RECALL
Due to a design change in 2015, corrosion on the sample probe electrical contacts can occur and lead to a disturbance of the sample liquid level detection (LLD). When disturbance of the sample liquid level detection (LLD) occurs, the affected sample probe may dip into the sample material deeper than intended. This may lead to carryover and medical risk cannot be excluded.
- RECALL
When using the cobas e 602 module, Diluent Multiassay may be used for autodilution of certain assays instead of Diluent Universal. This may cause incorrect results under specific circumstances if all of the following conditions are met simultaneously: More than a total of 2000 reagent kits or diluents have been registered on the cobas e 602 modules within one system core, and two different diluent
- RECALL
On cobas c 701 and cobas c 702 modules of the Cobas 8000 series analyzer, a mismatch between the reagent probe positioning and the aspirated reagent volumes under certain conditions can lead to insufficient reagent pipetting. This may affect patient sample and controls recovery for the following tests: Alkaline Phosphatase (ALP2), Alanine Aminotransferase (ALT), Bicarbonate (CO2-L), Creatinine (C
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