A patient is in the ED after falling off a ladder. His ankle appears swollen, out of alignment, and is painful to touch. What will the nurse do first?

A) Motor component of IV (Trochlear): The trochlear nerve primarily controls the superior oblique muscle of the eye, which is responsible for downward and lateral eye movements. The findings described do not relate to eye movement and therefore do not indicate dysfunction of this nerve.

B) Motor and sensory components of XI (Accessory): The accessory nerve innervates the sternocleidomastoid and trapezius muscles, primarily affecting head rotation and shoulder elevation. The symptoms noted in the assessment do not pertain to these muscle functions, so this option is not correct.

C) Motor component of VII (Facial): The signs of asymmetry in frowning, uneven eyebrow lifting, sagging eyelids, and air escaping when puffing the cheeks are characteristic of dysfunction in the facial nerve (cranial nerve VII). This nerve controls the muscles of facial expression, and impairment would lead to the described asymmetrical movements.

D) Motor component of X (Vagus) and sensory component of XII (Hypoglossal): The vagus nerve affects autonomic functions and some swallowing muscles, while the hypoglossal nerve controls tongue movements. Neither nerve is primarily responsible for the facial expressions described in the assessment findings, making this option incorrect.

A) Subjective report: The most reliable indicator of pain is the patient's own description of their experience. Pain is inherently subjective, and individuals may perceive and express pain differently. Listening to the client's self-report provides valuable insight into their pain intensity, quality, and impact on daily life, which cannot be accurately assessed through objective measures alone.

B) Physical exam: While a physical exam can provide important information about potential sources of pain or related conditions, it may not accurately reflect the intensity or nature of the pain the patient is experiencing. Physical findings may vary widely among individuals with similar pain complaints, making this a less reliable indicator.

C) Results of a CAT scan: Imaging studies like CAT scans can identify structural issues, such as fractures or tumors, but they do not measure pain. Many patients with significant pain may have normal imaging results, while others with severe findings may report minimal discomfort, underscoring the limitations of relying solely on diagnostic tests.

D) The client's vital signs: Vital signs can indicate physiological responses to pain, such as increased heart rate or blood pressure, but they are not specific indicators of pain severity. Many factors can influence vital signs, including anxiety and other medical conditions, making them unreliable for assessing pain levels independently.