Which of the following is NOT a common abbreviation used in medical documentation?

The choice indicating BMI, which stands for Body Mass Index, is indeed a commonly used abbreviation in medical documentation and is widely recognized in healthcare. It is used to assess an individual's body weight relative to their height, providing a useful metric for obesity and overall health assessments.

On the other hand, the other abbreviations such as CVA (Cerebrovascular Accident), HX (History), and gtt (guttae, meaning drops) are standard terms in medical documentation. They are frequently utilized in patient records, notes, and discussions among healthcare professionals to convey information succinctly and effectively.

Recognizing that BMI is a recognized and standard abbreviation in medical practice highlights the necessity of understanding common medical terms and their meanings, which helps in effective communication within healthcare settings.