Automated Fecal Sample Preparation System

What is the Automated Fecal Sample Preparation System?

This system prepares stool specimens for quantitative fecal tests by sampling a defined mass, mixing it with buffer and delivering the extract to a test device or tube. It suits laboratories performing fecal immunochemical or calprotectin testing where sample mass must be reproducible.

Overview

Stool collection devices usually include a probe that collects a defined mass of specimen when inserted into the sample. The preparation system then transfers the collected sample into a buffer tube, mixes it, and in some configurations filters or aliquots the extract for the analytical instrument. Reproducible sample mass matters because results for fecal immunochemical tests and calprotectin are expressed per gram of stool, so the device geometry and the buffer volume determine the dilution factor. Programs may include mixing time, temperature and homogenisation intensity, and the system records the specimen identifier with each extraction. Because stool handling generates aerosols and odours, working areas should be ventilated and surfaces cleaned after each batch.

How does it work?

Diagnostic sample preparation changes a specimen so that a downstream assay can measure it reliably. Serum and plasma are separated from cells by centrifugation and then aliquoted into labelled tubes, which reduces thaw cycles and cross-contamination during archiving. Some serology and molecular workflows require heat inactivation, typically at 56 degrees Celsius for thirty minutes, to reduce infectivity before handling. Solid or viscous specimens such as stool, sputum, swabs and tissue must be homogenised, liquefied or extracted into a buffer so that target organisms or analytes are released uniformly. Fecal immunochemical tests need a defined sample mass mixed with buffer, and blood film preparation requires a controlled spread and stain so that cells can be examined morphologically. Each step influences the analytical result, so volume accuracy, temperature control and traceability matter as much as in the analytical instrument itself.

What are the key features?

• Defined sample mass collection with a calibrated device probe
• Buffer addition and mixing with reproducible dilution factor
• Optional filtration or aliquoting of the extract
• Programmable mixing time and intensity
• Specimen identifier recorded with each extraction
• Contained handling to limit aerosol and odour exposure

What are the technical specifications?

A typical automated fecal sample preparation system configuration offers sample mass of 10–50 mg per collection with calibrated probe, buffer volume of 1–10 mL programmable, dilution factor of Fixed per device geometry, typically 1:50 to 1:200, mixing of Orbital or vortex mixing for 5–60 s, throughput of 20–60 samples/h and sample mass accuracy of ±10 % with the specified collection device. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Automated Fecal Sample Preparation System is used in fecal immunochemical testing for colorectal cancer screening, fecal calprotectin measurement, parasitology sample preparation and microbiome specimen homogenisation. Across the wider Sample Preparation class, laboratories also deploy it for serum and plasma aliquotting for serology and molecular testing, heat inactivation of serum before batch serology and stool and sputum processing for infectious disease testing.

Which standards and certifications apply?

Relevant standards and methods include ISO 15189, ISO 15190, CLSI GP16, CLSI M29, CLSI EP05, IEC 61010-1 and IEC 61010-2-101. Certification candidates for this model are CE, ISO 13485 manufacturing and NMPA class II registration; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Verify each device at installation with gravimetric volume checks, temperature mapping and, where relevant, recovery or uniformity studies using spiked specimens. Write procedures that define specimen acceptance, batch size, temperature and time limits, and the identification of each aliquot, because traceability between the primary tube and derived aliquots is frequently examined during accreditation. Clean and decontaminate surfaces, rotors and homogenisation chambers after each batch, and use sealed or disposable components where aerosols are a risk. Record maintenance, calibration and validation data, and review temperature records for heat inactivation and incubation steps. Treat all specimens, consumables and waste as potentially infectious.

How do I select the right Automated Fecal Sample Preparation System?

Specify this system when quantitative fecal tests are reported and sample mass reproducibility determines the validity of the result. In the RFQ confirm the collection device and its mass specification, the dilution factor, whether filtration is included, and whether the extract is compatible with your analyzer's sample cup format.

How does it compare with other Sample Preparation variants?

Start from the specimen types you receive and the assays that follow, since a device is only useful if its process matches the downstream kit requirements. For aliquotting, check the number of tubes per primary sample, the dead volume, the liquid class accuracy for viscous specimens and the labelling method. For heat inactivation, confirm the temperature uniformity across the bath or block, the capacity per batch and whether a lid is needed to limit evaporation. For homogenisation, choose between bead milling, rotor-stator and paddle systems according to specimen hardness and the need to keep analytes intact. For fecal and blood smear preparation, confirm the sample mass or film quality specification. In all cases, ask for process validation data and confirm that consumables are available locally.