Final answer:
During the rapid assessment, clear drainage from the patient's injury may indicate a serious injury such as cerebrospinal fluid (CSF) leakage.
Step-by-step explanation:
During the rapid assessment of an unresponsive 14-year-old male who was run over by a tractor, you should look for clear drainage coming from the patient's injury indicating a serious injury. Clear drainage may be a sign of cerebrospinal fluid (CSF) leakage, which can occur if there is damage to the skull or brain. CSF is a clear liquid that surrounds and protects the brain and spinal cord. If there is a fracture in the skull or severe brain trauma, the CSF may leak from the nose or ears.