The Unfinished Result: Making Diagnostic Follow-Up Accountable in UK Care
Diagnostics are often described as a journey from sample to result. In everyday UK care, however, the more consequential journey begins once the result exists. A laboratory report, imaging finding or point-of-care reading may be accurate and timely, yet still fail the patient if no one owns the next step. The last mile of testing — communication, action and safety-netting — is where diagnostic quality becomes clinical care, and where fragile handoffs are most visible.
The Result Is an Intermediate Event
A result is not a referral. It is not an appointment, a treatment plan or a safety net. It is a piece of evidence that must be interpreted in context, communicated to the right person and converted into a defined action within a defined timeframe. In UK primary care, that action may be a routine review, an urgent same-day assessment, a two-week-wait referral or a repeat test. In secondary care, it may be aMDT discussion, a procedure or a discharge communication back to the GP. Each transition introduces a risk of delay, omission or ambiguity.
The risk is not theoretical. A mildly abnormal blood test may be filed without a review date. An imaging report may recommend follow-up but not specify who should arrange it. A patient may see a result in the NHS App before a clinician has contextualised it, leading to anxiety or false reassurance. These are not failures of the assay. They are failures of the system around the assay.
Where the Loop Breaks
Closed-loop follow-up requires four elements: a named owner, a clear action, a deadline and an escalation route if the action does not happen. In practice, loops break at the interfaces. A test ordered in general practice may be reviewed by a locum, a trainee or an out-of-hours clinician. A hospital-ordered test may generate a report that is visible in secondary care but not obviously actioned in primary care. A community phlebotomy service may take the sample but have no role in acting on the result.
Administrative load is another pressure point. Results arriving in shared inboxes can be sorted by staff who are competent at workflow but not clinically trained to interpret urgency. Safety-netting advice may be recorded as “review if symptoms worsen” without specifying which symptoms, how quickly, or how the patient should make contact. For patients with low health literacy, language barriers or limited digital access, the loop can close in theory but remain open in practice.
Portals Make Visibility, Not Accountability
Patient portals and the NHS App have improved transparency. Patients can often see results, letters and appointment information without waiting for a phone call. That is a genuine advance. But visibility is not the same as accountability. A result displayed in an app does not tell the patient whether it is normal for them, whether a repeat is needed, or who will contact them if action is required.
Digital services should therefore be designed around the next step, not the result alone. A useful portal message states what the result means in plain English, whether any action is needed, who is responsible and when the patient should expect contact. It also provides a route back into the service if the expected contact does not happen. Without those elements, portals can shift administrative burden onto patients and widen inequalities for those least able to navigate digital systems.
AI Triage Must Be Judged by Closure
AI tools are increasingly used to prioritise results, draft patient messages and flag abnormal findings. These tools may reduce delays, but their evaluation should not stop at alert speed or user satisfaction. The relevant question is whether they improve closed-loop follow-up: the proportion of abnormal results with a documented action, the time from result to definitive decision, the number of patients lost between result and review, and the equity of those outcomes across different groups.
A system that generates more alerts but does not assign ownership may simply move work around. A system that drafts reassuring messages without clinical review may create new safety risks. In the UK, deployment should be accompanied by clear governance, human oversight, audit and mechanisms for reporting near misses. The measure of success is not how quickly a result is seen, but how reliably it is acted on.
Accountability Markers for Local Services
Services seeking to strengthen the last mile can begin with a simple audit: take a sample of abnormal results over a defined period and trace each one from report to action. Was there a named clinician responsible? Was the action recorded? Was the patient informed? Was a safety net documented? Did the loop close within the intended timeframe?
Integrated care systems and primary care networks can use such audits to identify where handoffs fail and to agree local standards for communication. Secondary care providers should ensure that follow-up recommendations are explicit and that responsibility is clear at discharge. Primary care should have a process for reconciling results with planned actions, including those generated outside the practice.
For Sarissa Biomedical’s readers, the message is practical rather than technological. Better diagnostics depend not only on better tests but on better follow-through. In 2026, as portals, remote monitoring and AI-assisted triage become more common in UK care, the test of any innovation should be whether it closes the loop — not merely whether it delivers the result.
