All of the following are possible effects of the incorrect application of the Heimlich maneuver EXCEPT:

Brain damage is not a typical effect of the incorrect application of the Heimlich maneuver. The Heimlich maneuver is primarily designed to expel an obstruction from the airway, and while it can cause physical trauma to the patient if performed improperly, such as damaging internal organs, ribs, or the chest, it does not directly result in brain damage.

When the maneuver is applied incorrectly, the most common injuries involve the thoracic region, including potential fractures of the ribs and damage to organs such as the spleen or liver due to high-pressure compressions. Additionally, significant force in the chest area could lead to other complications, but these injuries do not threaten brain function directly.

In contrast, brain damage generally results from a lack of oxygen supply over a prolonged period, which is not a directly associated risk with the Heimlich maneuver itself. This is fundamentally why brain damage does not fall under the potential outcomes of misapplying this lifesaving procedure.