The presence of a skull fracture confirmed via imaging study is indicative that significant force was involved in the injury. Specific types of skull fractures can result in special risks to the patient. One of these risks includes damage to facial, acoustic, and vestibular nerve function. Fracture of which of the following structures will increase a patient's risk of this type of damage?
Temporal bone
Parietal bone
Carotid canal
Base of the occipital bone
The Correct Answer is A
Rationale:
A. The temporal bone houses critical structures including the facial nerve (CN VII) and the vestibulocochlear nerve (CN VIII), which are responsible for facial movement, hearing, and balance. A fracture of the temporal bone can damage these nerves, leading to facial paralysis, hearing loss, vertigo, and balance disturbances. This makes it the most directly associated structure with the described complications.
B. The parietal bone primarily forms the sides and roof of the skull and is not closely associated with the facial, acoustic, or vestibular nerves. Fractures here are less likely to cause these specific nerve deficits.
C. The carotid canal transmits the internal carotid artery, not the facial or vestibulocochlear nerves. Injury here would more likely affect cerebral blood flow rather than cause facial, hearing, or balance dysfunction.
D. The occipital bone is associated with structures such as the foramen magnum and cranial nerves related to lower brainstem function (e.g., CN IX–XII). It is not primarily associated with the facial or vestibulocochlear nerves, so fractures here are less likely to produce the described deficits.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. In trauma care, a transient responder initially shows improvement in vital signs (such as blood pressure, heart rate, and mental status) after receiving a fluid bolus, typically isotonic crystalloids. However, this improvement is short-lived. As fluids are reduced to maintenance levels, signs of poor perfusion (e.g., hypotension, tachycardia, decreased urine output, altered mental status) reappear. This pattern strongly suggests ongoing internal bleeding or unresolved fluid loss. Transient responders are at high risk for decompensation and usually require rapid escalation of care, including blood transfusion, identification of the bleeding source, and possible surgical or interventional control. This classification helps guide urgency and prioritization in trauma management.
B. This describes a rapid responder, not a transient responder. Rapid responders maintain stable vital signs and adequate perfusion after initial resuscitation, indicating that significant ongoing bleeding is unlikely. These patients can often be monitored with less aggressive intervention.
C. This statement is incomplete and nonspecific. While transient responders may temporarily improve with fluids and even blood products, the defining feature is that the improvement is not sustained. Simply stating that the patient “responds” does not capture the transient nature or clinical significance of their response.
D. The classification is not based on the speed of response but on the durability of the response. A transient responder may initially respond quickly, but the key issue is that the improvement is temporary and followed by deterioration, indicating ongoing pathology such as hemorrhage.
Correct Answer is C
Explanation
Rationale:
A. In a mass casualty incident, immediate action is required. Waiting for instructions could delay life-saving interventions and compromise patient outcomes. Nurses and first responders must act quickly based on established triage protocols.
B. While individualized care is ideal in standard clinical settings, during an MCI it is not practical due to limited resources and the number of patients. The focus must be on rapid assessment and stabilization of those most critically injured.
C. The priority in a mass casualty incident is to quickly assess and categorize patients based on the severity of injuries using triage systems like START (Simple Triage and Rapid Treatment). This ensures that life-saving resources are allocated to those who are most likely to benefit and prevents preventable deaths.
D. Equal allocation without regard to injury severity can result in critically injured patients not receiving timely care, increasing mortality. Resource allocation in MCIs is based on medical need and survivability, not equality.
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