Why point-of-care testing is moving closer to patients

For decades the default pathway for a routine blood test has been familiar: a trip to the GP or clinic, a sample sent to the local laboratory, and a result a day or two later. That model still works well for much of what we do. But it fits awkwardly around a growing set of clinical questions — a care home resident with a suspected infection, a warfarin review in a rural dispensary, an HbA1c check during a community pharmacy consultation. In each case the useful answer is the one available while the patient is still in the room.

Point-of-care testing (POCT) is best understood not as a replacement for the laboratory but as an extension of it. The analytical science, quality framework and clinical interpretation remain laboratory disciplines; what changes is where the sample is taken and who presses the button. Done well, POCT shortens time to a clinical decision, reduces journeys for frail or housebound people, and frees hospital laboratories to concentrate on the complex work that only they can deliver.

Choosing devices that fit the setting

Device selection is where many community projects succeed or fail. A platform that performs beautifully in a busy emergency department may be a poor fit for a single-handed practice, and vice versa. Work through the following before committing budget:

• Start with the clinical pathway, not the device. Be explicit about the decision the result will trigger. An INR result that changes a warfarin dose needs different performance characteristics from a CRP result used to support a prescribing decision.
• Match the sample type to the operator. Capillary finger-prick sampling is practical in most community settings, but it demands good technique. Devices needing venous blood, or that require precise volumes, raise the training bar considerably.
• Check the analytical performance claims and the evidence behind them. Look for peer-reviewed evaluations in the intended population, not just the manufacturer's package insert. Be sceptical of claims made only against a reference method in a controlled study.
• Consider connectivity out of the box. If the device cannot export results in a usable format, someone will be transcribing numbers onto paper — and transcription is where errors breed.
• Think about the whole cost. Consumables, quality control material, external quality assessment (EQA) fees, training time, and maintenance all sit alongside the purchase price.

Training and competency: the human variable

The single biggest source of variability in community POCT is not the analyser — it is the operator. Healthcare assistants, pharmacists, nurses and care home staff may all be running tests, often infrequently and in isolation. A one-off training session is not enough.

Build a competency framework that includes initial training, a period of supervised practice, and periodic reassessment. Keep records that would satisfy an inspector: who was trained, by whom, on which device, and when they were last observed. Short, practical refresher sessions work better than annual lectures. Where possible, link community operators to a named laboratory contact who can answer questions and provide feedback on discrepant results. That relationship also gives the laboratory visibility of what is happening out in the field, which is invaluable when something goes wrong.

Quality assurance is not optional

Once a result influences a clinical decision, it needs a quality framework behind it, regardless of where the test is performed. The essentials are well established:

• Internal quality control run on a defined schedule, with documented action when results fall outside limits.
• External quality assessment enrolment for every test type and every testing site, with results reviewed and acted upon rather than filed.
• Written standard operating procedures that reflect what actually happens on a Tuesday morning, not an idealised version of it.
• Clear arrangements for accreditation and oversight, with a POCT committee or equivalent group that includes laboratory representation and has real authority to pause a service.
• Incident reporting that feeds into the wider clinical governance structure, so near-misses in a pharmacy are visible to the trust's quality team.

It helps to be honest about scale. A single device in a rural practice still needs quality control material with a defined shelf life, a fridge with monitored temperature, and someone accountable for ordering consumables before they run out.

Connectivity and the data journey

Connectivity is often an afterthought and almost always the hardest part. Results generated in the community need to reach the patient record in a way that is timely, attributable and secure. Options range from direct device-to-system interfaces through to middleware that collates results from several sites.

Practical questions to settle early include: where does the result land, and does it reach the clinician who needs it? Are results distinguishable from laboratory results in the record, so that interpretation accounts for the different performance characteristics? Who is responsible for the interface when it breaks? Does the data flow meet NHS cyber security and information governance expectations? A result that arrives as a photograph of a device screen is not a connected result — it is a data protection incident waiting to happen.

Making POCT sustainable in the community

The projects that endure tend to share a few habits. They start small, prove the pathway, and scale only once the quality infrastructure is genuinely working. They involve the laboratory from the outset rather than after the first governance query. They appoint a clinical lead and an operational lead, and they treat training as a continuing commitment rather than a box ticked at launch.

Most importantly, they review. Audit the indications, the proportion of results that changed management, the turnaround times, and the near-misses. Point-of-care testing earns its place in community healthcare when it demonstrably improves the patient's journey without weakening the diagnostic standards the rest of the system depends on. Get that balance right, and it becomes one of the most quietly effective tools in the community clinician's kit.