In order to avoid exacerbating a patient's injury, it is especially important to use extreme caution when providing positive-pressure ventilation to patients with a:

The answer to this question is "PNEUMOTHORAX" such as in order to avoid exacerbating or getting into worse and bad condition of a patient's injury, it is especially important to use and apply extreme caution when providing positive-pressure ventilation to patients. Pneumothorax is a conditioned where there is an air leak between the lung and the chest, a collapsed lung.