Smart Toilets Developed to Detect Health Issues from Heart Problems to Bowel Cancer

A new generation of smart toilets is being developed to monitor users' health, with the potential to detect serious medical conditions such as heart problems, bowel cancer, and enlarged prostates before symptoms become apparent. These advanced toilets aim to transform bathrooms into personal diagnostic centers, offering continuous health monitoring.

One significant development is a high-tech toilet seat designed to detect atrial fibrillation (AF), an irregular heartbeat that is a leading cause of stroke. Approximately 1.4 million people in the UK have AF, a condition where the heart beats irregularly, allowing blood to pool and form clots. These clots can travel to the brain, potentially causing a stroke. AF can be particularly dangerous as it often occurs intermittently, making it difficult to diagnose until a stroke occurs.

Traditional methods for diagnosing AF, such as Holter monitors, provide only a short-term snapshot of heart activity and can be uncomfortable for patients. German firm Hamberger Medical has created a computerized toilet seat equipped with four electrodes that perform an electrocardiogram (ECG). When a person sits on the seat, it records heart activity for 30 seconds and transmits the data to a smartphone app, which can then send it to a doctor. A clinical trial comparing this toilet seat ECG with a conventional hospital ECG reportedly showed equal effectiveness in detecting heart rhythm abnormalities, though these findings are awaiting peer-reviewed publication. The battery-powered seat costs just over £1,000 and is currently available only in Germany.

Dr. Klaus Witte, a consultant cardiologist, described the concept as interesting, noting that while abnormal heart rhythms are a risk factor for stroke, AF is often discovered too late. He suggested that smart toilet seats could serve as a viable alternative for individuals who find smartwatches uncomfortable or less reliable for ECG monitoring due to suboptimal skin contact.

Another innovation comes from New York-based health tech firm Casana, which has developed a toilet seat that not only performs an ECG but also includes a sensor for photoplethysmography. This sensor uses light shone through the skin to measure heart rate and blood oxygen levels. This technology could be particularly beneficial for patients with chronic conditions like chronic obstructive pulmonary disease (COPD) or lung cancer, who often require regular monitoring of their oxygen levels. These smart seats could offer a more convenient alternative to finger-worn pulse oximeters, automatically checking oxygen levels with each use.

Beyond heart health, other companies are developing devices that attach to the toilet bowl itself. Texas-based Throne Science has created a camera that analyzes stool for color, consistency, and the presence of blood, all potential indicators of bowel cancer. The device also monitors urine color and concentration. For men, a built-in microphone analyzes the sound of the urine stream, which may provide clues about prostate health. Weak urine flow or intermittent streams could suggest benign prostatic hyperplasia, or an enlarged prostate. If this technology can detect subtle changes before a person notices them, it could lead to more effective drug treatments and potentially avoid surgery. The device costs $400 in the U.S. but is not yet available in the UK.

Dr. James Kinross, a colorectal surgeon, believes smart toilets could be valuable for future screening of diseases like bowel cancer and for reliably tracking patient responses to treatments, potentially offering more accurate data than patient recall.

Consumer electronics firm Withings has introduced a urine analysis device, the U-Scan Nutrio, which clips onto the toilet bowl. It collects urine samples for analysis of hydration, acidity, and ketone levels. For individuals with diabetes, elevated ketone levels can signal a dangerous buildup of acids in the blood. The U-Scan Nutrio costs £319.95, with an additional £35 monthly fee for cartridges. Professor Alex Miras, an endocrinologist, acknowledged the technology's interest but noted that blood ketone meters are already effective for people with type 1 diabetes.

Despite the potential benefits, experts caution about the downsides of constant health monitoring. Dr. Kinross warned that highlighting minor, harmless fluctuations in health data could lead to unnecessary anxiety among users.