Continuous Glucose Monitors (CGMs) are a revolutionary technology that has helped many people with diabetes monitor their glucose levels more effectively. They allow real-time monitoring of blood sugar levels, which makes it easier to control blood glucose and helps prevent unexpected spikes and falls. However, like any technology, CGMs also present challenges and problems that may affect their effectiveness. In this article, we will discuss the most common issues that cGMS users face and how to deal with them.
One of the most frequent problems reported by cGMS users is the issue of accuracy. Although modern CGMs have improved significantly in recent years, they can still present readings that are not 100% accurate. Variations between the values measured by the CGM and the results of capillary glucose monitors (with the use of test strips) can occur, especially when glucose levels are changing rapidly.
Incorrect calibration can also influence the results. Some cGMS models still require regular calibrations with a manual glucose measurement, and if this is not done correctly, there may be divergences in the readings. It is important to follow the manufacturer's recommendations and, when in doubt, perform a manual glucose check.
Another common problem is the difficulty in attaching the sensors to the skin. Often, the sensor can come off before the recommended time of use, which can be frustrating, especially for those who practice physical activities or live in hot and humid environments. This may compromise the operation of the CGM and increase the cost, as additional sensors may be required.
To improve adhesion, many users use extra adhesive tapes or waterproof products to protect the sensor. Some companies also offer specific patches to help keep the sensor in place. In addition, it is essential to prepare the skin properly before application, cleaning it well and avoiding oily products.
CGMs do not directly measure glucose in the blood, but rather the glucose in the interstitial fluid, which means that there is a slight delay in the readings relative to the actual level of glucose in the blood. This delay can range from 5 to 20 minutes, which can be critical at times of rapid glucose changes, such as after a high-carbohydrate meal or during hypoglycemia.
Users should be aware of this delay, especially when adjusting insulin doses or during exercise, when glucose levels can fluctuate rapidly. In these cases, manual glucose monitoring may still be necessary to ensure greater accuracy.
Although CGMs have become more affordable in recent years, costs are still a significant obstacle for many diabetics. The price of sensors, transmitters, and readers can be high, and health plans don't always cover every device or provide full coverage. This may lead some people not to use CGM on an ongoing basis, limiting the benefits of this technology.
Fortunately, some government and manufacturer programs offer discounts or financial aid to make CGMs more affordable. It's important to check with your doctor or health plan about available options.
Skin irritation is another issue that some cGMS users face. Because the sensors remain on the skin for days, this can cause itching, redness, or even allergies. The adhesive material used may be the cause of the irritation, especially in people with sensitive skin.
To minimize these effects, users can test different types of skin protectors or utilize barriers between the skin and the sensor adhesive. It is also recommended to alternate the sensor insertion sites to give the skin recovery time.
Despite the problems, CGMs represent a major innovation in the treatment of diabetes and offer a convenient way to monitor glucose levels. However, it is essential to be aware of the challenges that may arise in the daily use of these devices. By understanding and dealing with the most common issues, such as accuracy, sensor adherence, delayed readings, and skin irritations, users can improve their experience with cGMs and make the most of their benefits. Always consult your doctor to discuss the challenges you're experiencing and find solutions that work best for you.
