The FreeStyle Libre 2 and FreeStyle Libre 3 are continuous glucose monitors (CGMs) developed by Abbott, designed to assist people with diabetes in managing their blood sugar levels. Both devices offer a non-invasive way of monitoring glucose levels, reducing the dependency on fingersticks. However, there are several differences between the two models, which may impact a user's experience and overall effectiveness in diabetes management.
Sensor Size and Shape
One of the most noticeable differences between the FreeStyle Libre 2 and FreeStyle Libre 3 is the size of the sensors. The FreeStyle Libre 3 sensor is smaller than its predecessor, about the size of two U.S. pennies stacked on top of each other. This smaller size makes the FreeStyle Libre 3 more discreet and less likely to get knocked off or torn off by clothing. Additionally, the FreeStyle Libre 3 sensor uses less plastic and less cardboard, resulting in a smaller environmental footprint.
Accuracy and Performance
The FreeStyle Libre 3 sensor is currently the most accurate CGM sensor available, registering a Mean Absolute Relative Difference (MARD) of 7.9%. This represents a significant improvement over the FreeStyle Libre 2, which has a MARD of 9.3%. The smaller sensor size and improved technology contribute to the increased accuracy of the FreeStyle Libre 3 sensor.
Real-time Monitoring
One of the main advantages of the FreeStyle Libre 3 over the FreeStyle Libre 2 is its real-time glucose monitoring capabilities. The FreeStyle Libre 3 transmits glucose data automatically to a compatible smartphone or reader every minute, allowing users to quickly and easily see their glucose levels as they change. This real-time monitoring capability can help users make informed treatment decisions and reduce the amount of time glucose levels spend above or below the target range.
Alarm System
Both the FreeStyle Libre 2 and FreeStyle Libre 3 have optional high and low glucose alarms to alert users to changes in their glucose levels. However, the FreeStyle Libre 3 sensor is more accurate, resulting in a lower MARD, which may make the alarms more sensitive and easier to interpret.
Battery Life and Durability
Another difference between the two models is the battery life and durability of the sensors. The FreeStyle Libre 3 sensor can last for up to 14 days, which is the same as the FreeStyle Libre 2. However, the FreeStyle Libre 3 sensor is more environmentally sustainable, using 41% less plastic and 43% less cardboard compared to the FreeStyle Libre 2.
App兼容性和 Usage
The FreeStyle Libre 2 and FreeStyle Libre 3 both have companion apps that allow users to access their glucose data. However, there are some differences in the apps. The FreeStyle LibreLink app is only compatible with certain mobile devices and operating systems, while the LibreLinkUp app is only compatible with certain mobile devices and operating systems. Users should check the compatibility guide for their specific device before using the app.
Cost
The FreeStyle Libre 2 sensors are slightly more expensive than theFreeStyle Libre 3 sensors, but the difference is small. Both sensors are typically priced around $150 for a 28-day supply.
In conclusion, the FreeStyle Libre 3 offers several improvements over the FreeStyle Libre 2, including a smaller and more accurate sensor, real-time monitoring capabilities, and increased battery life. However, the two models have similar battery life and durability, and users should weigh the benefits and features of each sensor based on their specific needs and preferences.
