Final answer:
Inaccurate glucometer readings can result from several factors, including the improper amount of blood used or compromised test strips. Proper use and storage of test strips are essential for accurate blood glucose measurement.
Step-by-step explanation:
When you observe a glucometer reading of 250mg/dL with a second test resulting within the expected reference range, several factors could have caused the first result to be inaccurate. Answer choices such as too much blood or too little blood being used, or even the first drop of blood being used, can impact the accuracy of the glucose reading. However, test strips being left open can also have a significant effect. If test strips are exposed to the environment for too long, they may become compromised, leading to erroneous readings. It is crucial to use test strips as directed and ensure they are properly stored to maintain their integrity for accurate glucose measurements.