The nurse plans care for a client with a brain tumor who developed a syndrome of inappropriate antidiuretic hormone.
Which interventions should the nurse include in the plan? Select all that apply.
Monitor blood glucose levels.
Administer tolvaptan.
Assess for dry mucous membranes.
Monitor sodium levels.
Maintain fluid restriction.
Implement seizure precautions.
Correct Answer : B,D,E,F
Managing SIADH requires understanding water metabolism and the effects of excessive antidiuretic hormone. Knowledge of fluid volume excess, dilutional hyponatremia, and neurological risks is applied to select interventions that correct electrolyte imbalances and prevent life-threatening cerebral edema.
Choice A rationale
Blood glucose monitoring is not a standard intervention for SIADH. While brain tumors can affect various hormones, SIADH specifically impacts water retention and sodium levels rather than the insulin-glucagon axis or glucose metabolism directly.
Choice B rationale
Tolvaptan is a vasopressin receptor antagonist that promotes the excretion of free water without losing electrolytes. It is specifically used in SIADH to treat euvolemic hyponatremia by blocking the effects of excessive antidiuretic hormone.
Choice C rationale
SIADH causes fluid retention and volume expansion, leading to moist mucous membranes and fluid overload. Assessing for dry membranes is more appropriate for dehydration or diabetes insipidus, which is the opposite of SIADH.
Choice D rationale
SIADH leads to dilutional hyponatremia (normal sodium 135 to 145 mEq/L). Frequent monitoring is essential because low sodium levels can lead to mental status changes, muscle twitching, and life-threatening cerebral edema if not managed.
Choice E rationale
Fluid restriction is the primary treatment for SIADH. By limiting intake, the body can slowly correct the dilutional hyponatremia. This prevents further expansion of the intravascular volume and reduces the risk of worsening hyponatremia.
Choice F rationale
Severe hyponatremia significantly increases the risk of seizures due to brain cell swelling. Implementing seizure precautions (padded side rails, suction equipment) is a critical safety measure for any patient with rapidly falling or low sodium.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Maintaining airway patency while managing intracranial pressure requires a balance between oxygenation and avoiding spikes in pressure. Knowledge of airway management and the physiological effects of hypoxia on cerebral edema is essential for prioritizing immediate life-saving interventions.
Choice A rationale
Elevating the head of the bed to 30 to 45 degrees promotes venous drainage and reduces intracranial pressure. While a standard nursing intervention for these patients, it does not clear an obstructed airway caused by pooled secretions.
Choice B rationale
Limiting stimulation helps prevent sudden increases in intracranial pressure caused by environmental stress. Although important for neurological stability, it is not the priority when the client's airway is compromised by secretions that prevent adequate ventilation.
Choice C rationale
Suctioning is necessary to clear the airway and maintain oxygenation. Hypoxia and hypercapnia are potent vasodilators that significantly increase intracranial pressure. Clearing the airway is the first priority, though it should be done quickly to minimize stimulation.
Choice D rationale
Sedatives may be used to reduce metabolic demand and blunt the intracranial pressure response to noxious stimuli like suctioning. However, administration takes time and does not physically remove the secretions causing the immediate airway obstruction..
Correct Answer is A
Explanation
The nurse must utilize knowledge of thoracic drainage mechanics and equipment troubleshooting. A three-chamber system requires consistent suction to maintain negative pleural pressure. Identifying the cause of suction failure involves systematic assessment of the external vacuum source and tube integrity.
Choice A rationale
Suction control chambers in wet systems require active external suction to function. Bubbling indicates vacuum application. Verifying the regulator is on ensures the system has the mechanical force necessary to maintain the ordered negative pressure for lung re-expansion.
Choice B rationale
Milking or stripping chest tubes creates high levels of negative pressure that can damage delicate lung tissue. This practice is generally contraindicated unless specifically ordered by a surgeon, as it increases the risk of pleural trauma and tension pneumothorax.
Choice C rationale
Absence of bubbling in the suction control chamber of a wet system is an abnormal finding. It signifies a lack of active suctioning. The nurse cannot ignore this, as effective pleural drainage depends on continuous atmospheric pressure regulation.
Choice D rationale
While water levels dictate suction intensity, adding water will not resolve a lack of bubbling if the suction source is off. Bubbling is caused by air passing through water via the suction regulator, not the volume itself.
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