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
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Assay / QC failure across a channel or the whole system
HighSymptoms: Controls out of range, calibration fails, flagged results, drift over a shift.
Root cause: Reagent or cuvette issue, lamp ageing, a probe / mixer / wash-station fault, or ISE-module problems.
Sample / reagent probe clog or crash
MediumSymptoms: Short aspiration, no dispense, clot detection, probe-position error.
Root cause: Clogged or bent probe, or a clot in the sample.
Cuvette / reaction-rotor fault
MediumSymptoms: High cuvette blanks, non-uniform results by position, rotor-drive error.
Root cause: Worn / scratched cuvettes or a wash fault, or a rotor-drive fault.
ISE module fault (Na / K / Cl)
MediumSymptoms: Electrolyte results biased or noisy, ISE calibration fails.
Root cause: Aged ISE electrodes / reference, or a pinch-valve / tubing fault.
Water / vacuum / pressure system fault
MediumSymptoms: Multiple station alarms, priming failures, poor wash.
Root cause: Water / DI supply quality, a pump, or a vacuum / pressure regulator.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Sample / reagent probes
Class Periodic replacementRel. cost $$R&R Moderate
Photometer lamp
Class Frequent wear itemRel. cost $$R&R Moderate
Reaction cuvettes / segment
Class Frequent wear itemRel. cost $$R&R Easy
ISE electrodes (Na / K / Cl) & reference
Class Frequent wear itemRel. cost $$R&R Fairly easy
Peristaltic / pinch-valve tubing
Class Frequent wear itemRel. cost $R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Sample / reagent probes | Periodic replacement | $$ | Moderate |
| Photometer lamp | Frequent wear item | $$ | Moderate |
| Reaction cuvettes / segment | Frequent wear item | $$ | Easy |
| ISE electrodes (Na / K / Cl) & reference | Frequent wear item | $$ | Fairly easy |
| Peristaltic / pinch-valve tubing | Frequent wear item | $ | 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.
- ·Daily QC controls run and reviewed
- ·Calibration verification per assay
- ·Routine cleaning and decontamination
- ·Scheduled reagent-path and pump-tubing maintenance
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Assay or QC failure
- Run fresh controls at all levels.
- Confirm reagents are in date, correctly loaded and mixed.
- Run the photometer check and replace the lamp if energy is low.
- Clean the probes, mixers and wash stations.
- Recalibrate the affected assay / ISE module and re-run QC.
Symptom: Probe clog or crash
- Inspect the probe for a bend or blockage and clear it.
- Run the fluidics prime / wash cycle.
- Check for a clot in the sample.
- Verify liquid-level sensing and probe positioning.
- Replace the probe if aspiration is still short.
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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