Hospitals & Clinics

Contamination control in healthcare spans several distinct settings: operating theatres, sterile processing and sterilisation units, and pharmacy compounding areas where sterile preparations are made. Each is a controlled environment in the same sense as an industrial cleanroom, built around the same underlying measurement discipline – but in healthcare the environment exists to protect the patient rather than a manufactured product.

Airborne particles and microorganisms can settle on an open surgical site, on instruments during reprocessing, or into a sterile preparation during compounding. Controlling the air in these spaces is one part of a much broader infection-control and quality framework that healthcare facilities already run – air sampling doesn't replace that framework, it provides objective, repeatable data on one part of it: what's actually in the air where it matters.

The same two measurements used in any cleanroom apply here. Particle counting measures airborne non-viable particles and supports classification of the space under ISO 14644-1. Microbial air sampling captures viable microorganisms on an agar medium for incubation and counting, which is typically the more directly relevant measurement in a clinical setting, since it's viable contamination that carries an infection-control risk. Most healthcare environmental monitoring programmes run both side by side rather than relying on either alone.

Operating theatres and sterile units rarely stand empty, so measurement has to be planned around the clinical schedule rather than the other way round. We plan sampling to fit around surgical lists and processing windows in sterile services, and can measure in the occupancy state that's actually relevant – at rest between cases, or in operation during a representative period of clinical activity – as part of an ongoing environmental monitoring programme rather than a single visit, depending on what your facility needs to show.

Sterile processing and decontamination units reprocess instruments between uses, and depend on controlled air to keep reprocessed instruments from picking up contamination before they're packaged and stored. Pharmacy compounding rooms, where sterile preparations are mixed on-site, face a related but distinct risk: the air itself can introduce contamination directly into a preparation during compounding, part of why compounding areas are typically treated as a cleanroom in their own right rather than an extension of the pharmacy floor.

Instrument choice matters more here than in an empty industrial cleanroom, because measurement often happens while people are present. Our microbial air sampler runs under 60 dB(A) and weighs under two kilograms with its sampling head, which makes it practical to move between an operating theatre, a sterile processing area and a compounding room in the same visit without disrupting the people working in them. Portable particle counters cover the same ground for non-viable measurement, moving between rooms rather than needing a fixed installation in each one.

Instruments used for hospital and clinic air monitoring are calibrated on a recurring schedule with a traceable certificate, the same standard we apply to any regulated cleanroom instrument. Results are delivered in a report that supports internal quality assurance and any external audit or inspection your facility undergoes, without us asserting what a specific national healthcare standard requires – that determination sits with your own infection-control and quality teams, working from the standards that apply to your facility.

See our guide to microbial air monitoring for more on the active and passive sampling methods behind these results – the same techniques described there apply directly to operating theatres, sterile processing units and compounding areas.