By Dr Kerrie Davies
When it comes to staying healthy, knowledge really is power. Imagine if we could catch diseases earlier, treat them faster, and even prevent them altogether — that’s the promise of In-Vitro Diagnostics, or IVDs.
IVDs are tests that analyse samples like blood, urine, or tissue taken from the body — but they do their work outside the body, usually in a lab or increasingly at the point of care. These tests tell us what’s going on inside us, often before we feel unwell. That’s why they are one of the most powerful tools we have to shift from treating disease to preventing it.
At a time when the NHS is focused on three big strategic shifts — from hospital to community, from sickness to prevention, and from analogue to digital — IVDs sit right at the heart of this transformation.
IVDs might sound technical, but you’ve likely already used or benefited from them. Think back to the COVID pandemic: the nose or throat swab you took was an IVD. The urine test for a urinary tract infection? Also, an IVD. Even the finger prick test to check your blood sugar if you have diabetes—that’s an IVD too. There are three main types of IVDs:
- Screening tests spot early signs of disease, often before symptoms appear.
- Diagnostic tests confirm whether you have a condition.
- Monitoring tests help manage ongoing health issues, making sure treatments are working.
Why it matters:
One of the biggest shifts in healthcare today is moving from treating illness to preventing it. IVDs play a crucial role in this shift. By detecting conditions early, they give patients more treatment options and better outcomes.
Take sepsis, for example. If detected and treated within the first hour, the risk of death can drop by almost half. That’s a dramatic difference—simply by getting the right test at the right time.
Screening for cervical cancer is another example. Using new IVDs that detect the viruses that cause cervical cancer, we can intervene early, before cancer develops, and save lives.
I speak from personal experience. As someone with a lifelong thyroid condition, I rely on an annual blood test to check that my medication is still right for me. That simple test helps me stay on top of my health and have informed conversations with my GP.
From your hospital to your home
IVDs are no longer just confined to hospital labs. Thanks to rapid testing, results can now be available within minutes—right at the point of care, like a GP surgery, a pharmacy, or even your home.
This means fewer clinic visits, quicker results, and faster decisions about your care. We’ve all seen how vital rapid testing became during the COVID-19 pandemic. Quick IVD tests meant we could diagnose and isolate people fast, protecting others and guiding hospital care.
It also supports the NHS and government strategy to deliver more care in the community rather than in hospitals. And for those living with long-term conditions—like diabetes, thyroid disorders, or heart disease—IVDs allow for regular, sometimes at-home, testing. These insights help people adjust their lifestyle or medication and stay on top of their health.
Personalised medicine
Everyone’s body is different. How you respond to disease—or treatment—can depend on your unique biology. IVDs can now provide highly personalised insights, even at the genetic level. IVDs, especially genetic tests, help us understand those differences. For example, someone with the BRAC gene mutation may be at higher risk of breast cancer — and that information could shape everything from lifestyle choices to major decisions about treatment.
Improving health equity and efficiency
Access to testing is key. In areas of high deprivation—where people may be at greater risk of disease—IVDs can help close the health gap by making early diagnosis and monitoring more accessible.
While testing does add an initial cost, it can ultimately reduce long-term healthcare expenses by avoiding costly complications or hospital admissions. But we need more robust data to properly evaluate the full value of IVDs in the healthcare system.
Technology, AI, and the Future of diagnostics
The future of IVDs is powered by innovation. One really good example for the use of AI is in histopathology, where artificial intelligence (AI) is already helping to interpret tissue samples faster and more accurately. Robots now prepare samples, freeing up staff to focus on the critical task of interpreting complex results.
As technology improves, IVDs will become even more embedded in everyday life—empowering people to take control of their health through home testing devices that sync directly with hospitals.
Ultimately, IVDs are about empowering people. For patients, they offer clarity and control. For healthcare professionals, they provide actionable insights that lead to better conversations and better care.
Whether it’s catching disease early, tailoring treatment, or managing chronic conditions, in-vitro diagnostics are not just about tests—they’re about transformation.
And that transformation puts knowledge, and power, in your hands.