In the 1920s, diabetes was diagnosed mainly through clinical observation of the symptoms. Physicians were able to diagnose diabetes by looking for signs and symptoms of the disease, such as excessive thirst, frequent urination, weight loss, and fatigue. Other conditions such as diabetes-related complications, such as nerve damage or heart problems, could also be a factor in the diagnosis.
The first modern medical test for diabetes was the fasting plasma glucose test. This test measured the level of glucose in the blood after an overnight fast. A patient’s fasting plasma glucose level was compared to a normal range to determine if diabetes was present. This test was first used in the 1920s, but it wasn’t until the 1950s that the test became a widely used diagnostic tool.
In addition to the fasting plasma glucose test, urine tests were also used to diagnose diabetes in the 1920s. The tests measured the level of glucose in the urine, and if the levels were higher than normal, it was an indication of diabetes. However, urine tests were not as accurate as the fasting plasma glucose test and could be affected by other factors, such as medications.
In the 1920s, physicians also used physical examinations to diagnose diabetes. They would look for signs of the disease, such as a lack of sensation in the feet or hands, or changes in the shape of the feet. Additionally, physicians would look for signs of dehydration, as this was another indication of diabetes.
Overall, diabetes diagnosis in the 1920s was mainly based on clinical observation and physical exam. The use of the fasting plasma glucose test helped to improve the accuracy of diagnosis, and it is still used today as a standard diagnostic tool.