What do these products do in this instrument?
Tubing and fittings: connect sampling, dilution and detection branches
Form the real blood-contact, reagent and detection-supply paths. A blood-sampling line, a metered diluent line and a method-required sheath branch do not have interchangeable flow or renewal duties, even when their fittings look similar.
Tubing and fittings together form sealed connections and the actual transfer path. Check formulation, inner/outer diameters, length, tube-end positioning and port geometry, including added volume in residue and arrival delay.
Choose dimensions by the material moving through the branch
For the sample path, include mixed whole blood, remaining specimen volume and the actual pressure states in the bore and routing decision. Reagent paths must suit their formulations and cleaning exposure. Avoid selecting every branch from one nominal tube size: reducing held volume and providing the required installed flow are competing considerations that must be resolved for that branch.
Further technical reading
Restore channel state after opening the circuit
Replacement introduces a new assembly state and may change held volume or admit air. Establish the correct liquid path, prime toward its intended destination and check sample renewal before measurement. Compare the channel blank and method-required detection conditions after cleaning; restoring a sampled volume alone does not show that the downstream channel has recovered.
Translate actual branch conditions into configuration requirements
| Condition | To confirm |
|---|---|
| Blood-contact section | Record actual sample handling, contact surfaces, bore, routing and pressure states, including the wash procedure for that section. |
| Reagent and detection sections | Separate metered diluent and lysing-reagent duties from any required continuous supply; identify the relevant channel rather than assuming a common sheath architecture. |
| Maintenance release | Document replaced dimensions and seating, priming destination, channel renewal and the blank or recovery result before processing samples. |
| Operation | Specific operating conditions |
|---|---|
| Whole-blood sampling and delivery | Blood-contact or system-liquid sampling path, sample mixing and remaining volume, installed connection dimensions and probe wash sequence |
| Hematology-channel cleaning and waste removal | Sampling, reaction and detection segments reached by cleaning; actual return/waste routing, air removal and the channel blank required after service |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| Tubing materials and dimensions | Connection paths and shared volume | Bore, length, load and actual formulation jointly determine materials and dimensions |
| Rigid-tubing fittings | Tube-end positioning and sealed connections | Check tube outer diameter, threads, seal structure and port-bottom geometry |
Related operations and architecture comparisons
Whole-blood sampling and delivery
Sample condition may change between repeated aspirations. Compare containers with normal remaining sample volume, low remaining sample volume and particle risks, recording tip position and air-aspiration handling rather than testing only repeated water aspiration/dispensing.
Hematology-channel cleaning and waste removal
Cleaning must cover sampling, reaction and detection branches; waste removal must handle simultaneous inflow. After restart, check blanks and channel state before resuming sample measurement.
Confirm product roles in actual operation
| Operation | Measurements and observations | Priority checks |
|---|---|---|
| Whole-blood sampling and delivery | Measure whole-blood sample receipt through the serviced path using representative permitted conditions, then verify the subsequent dilution separately. | An altered bore, deformation or trapped gas may change aspiration; a correct sample dose does not establish the prepared dilution. |
| Hematology-channel cleaning and waste removal | Check the channel renewal sequence, air clearance and blank after cleaning or replacement, followed by the method-required recovery measurement. | A path can be leak-tight but retain old sample or cleaning liquid. Investigate the affected segment and channel state before repeating measurement. |
Release the serviced circuit with separate evidence for sample transfer, preparation and channel recovery. Preserve its routing and installed dimensions so future replacements reproduce the validated arrangement.
Can a blood-sampling tube be replaced with a similar tube from a reagent branch?
Compare the actual bore, materials, pressure states and cleaning duty first. A reagent branch may not share the same sample-contact or renewal requirements; verify blood transfer and downstream recovery in the complete assembly.
Metered dilution and sheath-fluid flow are different roles; sheath-fluid requirements depend on the detection architecture.