A warning about a specific brand of blood glucose meters has been issued by Federal regulators. The Food and Drug Administration reports meters made by Abbott Diabetes Care in Alameda, California, can unintentionally be switched from one unit of measurement to another, causing patients to interpret the reading incorrectly.

An inaccurate reading can lead to taking the wrong dose of insulin or dietary changes, resulting in higher levels of sugar in the blood or hyperglycemia.

The meters are designed to report blood glucose levels in two different measurements - the U.S. standard, milligrams per deciliter or mg/dL, and the foreign standard, millimoles per liter or mmol/L.

When a user is setting the time and date for the meter, The FDA claims meters may accidentally switch from one measurement to the other, unknowingly.

There have been reports of the measurement being switched after a meter was dropped or after replacement of the battery. These incidences, however, have yet to be confirmed.