A nurse is caring for a client who has a traumatic brain injury.
Which of the following should the nurse understand as a consequence of a traumatic brain injury?
Disruption of cellular function and blood vessel damage.
Damage to brain tissue from decreased pressure shock waves.
Increased synaptic connections from pressure.
Increased blood supply and edema to the area of injury.
The Correct Answer is A
Choice A rationale
A traumatic brain injury (TBI) causes immediate disruption of cellular membranes and organelles, leading to neuronal dysfunction and cell death. Concurrently, blood vessels can be torn or compressed, resulting in hemorrhage (hematoma formation) and ischemia, both contributing to secondary brain injury and impaired neurological function.
Choice B rationale
Damage to brain tissue from a traumatic brain injury is related to *increased* pressure from the initial impact and subsequent edema and hemorrhage, not decreased pressure shock waves. The primary injury involves mechanical forces that directly deform and injure brain tissue and blood vessels, leading to increased intracranial pressure.
Choice C rationale
A traumatic brain injury typically leads to *decreased* synaptic connections due to neuronal damage and death, not increased connections. The disruption of neural pathways and loss of neurons impair communication within the brain, contributing to cognitive and functional deficits, rather than enhancing synaptic plasticity.
Choice D rationale
While there can be an initial increase in blood flow to the injured area due to autoregulatory mechanisms, the *consequence* of a traumatic brain injury is often disruption of blood supply (ischemia) and significant edema, which further compromises cerebral perfusion and neuronal viability. The increased blood supply is often a transient, ineffective response.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D","E","F"]
Explanation
Choice A rationale
Constipation, leading to bowel distention and impaction, is a common noxious stimulus below the level of injury that can trigger autonomic dysreflexia. The distended bowel sends afferent signals that ascend the spinal cord, leading to an exaggerated sympathetic response.
Choice B rationale
Loose clothing does not provide any noxious or irritating stimulus to the skin or body below the level of spinal cord injury. Therefore, it is unlikely to trigger the exaggerated sympathetic response characteristic of autonomic dysreflexia, which requires a specific irritant.
Choice C rationale
Nausea is a symptom that originates from the gastrointestinal system and/or central nervous system pathways, but it typically does not involve a direct noxious somatic or visceral stimulus below the level of a T1 spinal cord injury that would precipitate autonomic dysreflexia.
Choice D rationale
Surgery performed below the level of injury can be a significant noxious stimulus that triggers autonomic dysreflexia, even under general anesthesia. The surgical manipulation and tissue irritation can activate the sympathetic nervous system below the lesion, leading to an uncontrolled response.
Choice E rationale
Urinary tract infections (UTIs) cause bladder irritation and inflammation, which are potent noxious stimuli below the level of a T1 spinal cord injury. The afferent signals from the inflamed bladder can ascend the cord, eliciting a massive sympathetic discharge and autonomic dysreflexia.
Choice F rationale
Pressure on the testicles, or any form of scrotal or genital irritation, constitutes a strong noxious stimulus below the level of a T1 spinal cord injury. This direct irritation can trigger the exaggerated sympathetic reflex arc, leading to the rapid onset of autonomic dysreflexia.
Correct Answer is C
Explanation
Choice A rationale
Notifying the provider is an important subsequent step, but it is not the immediate priority when a client experiences chills and back pain during a blood transfusion. These symptoms are indicative of a potential transfusion reaction, which requires immediate cessation of the transfusion to prevent further complications and potential harm to the client.
Choice B rationale
Covering the client with a blanket addresses the symptom of chills but does not stop the underlying cause or progression of a potential transfusion reaction. While comfort measures are important, the priority is to halt the administration of the causative agent to prevent further immunological or physiological responses that could escalate to a life-threatening event.
Choice C rationale
Stopping the transfusion is the immediate priority. Chills and back pain are classic signs of an acute hemolytic transfusion reaction, an immune-mediated response that can rapidly progress to severe complications, including renal failure, disseminated intravascular coagulation, and shock. Prompt cessation minimizes the volume of incompatible blood transfused and limits the severity of the reaction.
Choice D rationale
Assessing the client's skin for a rash is part of a comprehensive assessment for a transfusion reaction. However, stopping the transfusion takes precedence over this assessment. While a rash can indicate an allergic reaction, chills and back pain are more suggestive of a serious hemolytic reaction, demanding immediate interruption of the blood product.
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