Endoscope Channel Cleaning

The task is to remove Biological Residue/Protein/Mucus while controlling surface damage, residue carryover, brush shedding and chemical or temperature degradation.

The work happens in wet indoor area against biological residue, protein and mucus.

The part people get wrong: this is not one job. The same equipment carries several targets, each with a different opening and a different residue, and one brush rarely covers them all.

There are 5 distinct targets here, and the brush that suits one will usually not reach another.

The dimensional envelope those targets impose on the brush:

Select hand, tube, strip, roller, disc or machine-mounted geometry from access and motion.

All five are bore brushes pushed through the channel by hand at the reprocessing sink, before the scope ever reaches the washer.

In practical brush terms: reach first, then residue. A brush that fits but is too soft can be stiffened; a brush that does not fit is simply the wrong tool.

PBT, and nothing harder: it survives enzymatic detergent and high-level disinfectant without swelling, which is what keeps the head at the diameter the channel was sized to.

The constraints this application puts on the filament:

Start with soft-to-medium fill, a 90°C ceiling and an enzymatic cleaner at pH 6–9, then size a brush to each lumen’s own diameter and length.

The order that avoids rework:

1. Identify the target part and measure the access opening or clearance
2. Describe the residue: what it is, how thick it sits, and how strongly it holds
3. Choose the construction that can physically reach that target
4. Set the filament from surface risk, working temperature and cleaning chemistry
5. Fix filament diameter, free trim length and density for the contact pressure you need
6. Run one cycle and check the result before committing to a production quantity

Before you commit to a quantity, send each channel’s diameter and length, plus the reprocessing instructions that authorise brushing them.

Automated reprocessors run the validated cycle, and manual brushing is the pre-clean step named in the instructions rather than an alternative to it. A single-use channel brush is never reused, and a channel the instructions do not list as brushable is not brushed.

• Choosing a channel brush by scope brand instead of by each lumen’s diameter and length
• Changing the filament while leaving excessive engagement, poor alignment or no discharge path unchanged
• Copying a worn brush without first recording its motion, direction, mounting and original working diameter

When a brush is running but not cleaning, start here rather than adding pressure: