Final answer:
The pia mater, the innermost meningeal layer, was damaged in this case of a patient falling and sustaining an injury while getting out of the shower.
Step-by-step explanation:
The patient has suffered a fall and the tests reveal damage to the innermost meningeal layer. The structure that was damaged in this case is the pia mater. The pia mater is the delicate and innermost layer of the meninges, which are the protective membranes that surround the brain and spinal cord.
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