You are an RN who is precepting a newly graduated nurse. The new grad asks you what the signs and symptoms are for a patient with Cushing's Triad.
Which of the following WOULD NOT be part of your answer?
Bradycardia.
Widening pulse pressure.
Hypertension.
Hypothermia.
The Correct Answer is D
Choice A rationale
Bradycardia, a slow heart rate (typically below 60 beats per minute in adults), is a key component of Cushing's triad. It results from the body's compensatory response to increased intracranial pressure, where systemic hypertension triggers a reflex vagal response, leading to a decrease in heart rate.
Choice B rationale
Widening pulse pressure, defined as an increasing difference between systolic and diastolic blood pressure, is a hallmark of Cushing's triad. This occurs as the body attempts to maintain cerebral perfusion pressure by increasing systolic pressure against a relatively stable or slightly decreased diastolic pressure due to peripheral vasodilation.
Choice C rationale
Hypertension, specifically systolic hypertension, is a crucial component of Cushing's triad. It reflects the body's physiological attempt to overcome increased intracranial pressure and maintain adequate cerebral blood flow by increasing systemic arterial pressure, ensuring perfusion to the brain.
Choice D rationale
Hypothermia, a core body temperature below 35°C (95°F), is not a recognized component of Cushing's triad. Cushing's triad specifically describes a set of physiological responses to increased intracranial pressure: bradycardia, hypertension, and widening pulse pressure, all related to cardiovascular and respiratory regulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
While establishing IV access and fluid replacement are crucial in trauma, they are secondary to ensuring cervical spine stabilization in a patient who is unresponsive after a head-on motor vehicle crash. Uncontrolled movement of an unstable cervical spine can lead to irreversible spinal cord injury, exacerbating neurological deficits or causing paralysis.
Choice B rationale
Monitoring pulse and blood pressure frequently is an important ongoing assessment in a trauma patient to identify shock or other systemic issues. However, in the immediate post-crash scenario with an unresponsive patient, the primary concern is preventing further neurological damage from potential spinal cord injury, making stabilization a higher priority.
Choice C rationale
Inserting a nasogastric tube for decompression might be necessary later in the management of a trauma patient to prevent aspiration or gastric distension. However, it is not the immediate priority action in an unresponsive patient following a head-on collision, where airway, breathing, circulation, and most importantly, cervical spine protection are paramount.
Choice D rationale
In an unresponsive client following a head-on motor vehicle crash, cervical spine injury must be presumed until ruled out. Any movement of the head or neck could further compromise the spinal cord, leading to permanent neurological deficits or even death. Therefore, keeping the neck stabilized using a cervical collar and backboard is the absolute priority to prevent further injury.
Correct Answer is B
Explanation
Choice A rationale
Vecuronium is a neuromuscular blocking agent, not an anxiolytic. Its primary mechanism of action involves competitive antagonism of acetylcholine at the nicotinic receptors on the motor endplate, leading to muscle paralysis. It does not possess anxiolytic properties, and administering it without concurrent sedation would cause significant distress to a conscious patient who is paralyzed but fully aware.
Choice B rationale
Vecuronium facilitates ventilation by inducing skeletal muscle paralysis, thereby preventing spontaneous breathing and patient-ventilator asynchrony. This allows for precise control of ventilation parameters in critically ill patients, reducing oxygen consumption by respiratory muscles and improving gas exchange. This paralysis is crucial in conditions like ARDS where high airway pressures and controlled ventilation are often required.
Choice C rationale
Vecuronium does not directly decrease inflammation. Its action is specific to the neuromuscular junction, leading to muscle relaxation and paralysis. While mechanical ventilation facilitated by vecuronium can indirectly reduce lung injury by optimizing ventilation, it does not have intrinsic anti-inflammatory properties at a molecular or cellular level. Anti-inflammatory medications would be administered separately if indicated.
Choice D rationale
Vecuronium is not an antimicrobial agent and has no direct activity against infectious pathogens. Its therapeutic role is limited to inducing muscle paralysis for medical procedures or to facilitate mechanical ventilation. Treating infection requires specific antibiotics or antiviral medications. Administering vecuronium would not address the underlying infectious process in a patient with ARDS.
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