What is the definition of an elevated hemi diaphragm?

An elevated hemidiaphragm refers specifically to the condition where one side of the diaphragm is positioned higher than normal. This can occur due to several reasons, including restrictive pulmonary disease, phrenic nerve injury, or diaphragmatic paralysis. The term "hemi" indicates that it involves just one side (hemidiaphragm) rather than both.

The correct answer highlights the distinction between unilateral elevation (affecting one side) and other conditions that may affect both sides or indicate normal diaphragm positioning. Understanding this concept is important in clinical contexts, as recognizing the specific side of diaphragm elevation can help in diagnosing underlying conditions or potential complications.