The nurse prepares a continuous aminophylline infusion at 0.3 mg/kg/hr for a client weighing 165 pounds.

The bag is mixed with 500 mg of aminophylline in 250 mL of D5W.

At which rate should the nurse set the pump in mL/hr? Round the answer to the tenths place.

Endotracheal suctioning carries risks of hypoxia and vagal stimulation. Knowledge of respiratory physiology and emergency protocols is required to recognize when a procedure is causing clinical instability and to prioritize the immediate restoration of oxygenation and cardiac rhythm stability.

Choice A rationale

Tachycardia, arrhythmias, and desaturation during suctioning indicate acute hypoxia and myocardial stress. The nurse must stop the procedure immediately to prevent cardiac arrest and provide 100 percent oxygen to restore alveolar gas exchange and stabilize the heart rate.

Choice B rationale

Continuing the procedure while the patient is experiencing cardiac instability and severe hypoxia is dangerous. Prolonged suctioning increases the risk of further vagal stimulation and worsening hypoxemia, which could lead to fatal arrhythmias or sudden respiratory and cardiac collapse.

Choice C rationale

While the provider needs to be informed, it is not the priority. Immediate life saving intervention, such as stopping suctioning and hyper-oxygenating the client, must occur first to address the physiological distress and prevent further deterioration of the client.

Choice D rationale

Antiarrhythmics are not the first line treatment for suction induced arrhythmias. These rhythm changes are usually a direct result of hypoxia. Correcting the underlying oxygen deficiency by stopping the suction and providing supplemental oxygen usually resolves the tachycardia and irregularity..

This scenario requires understanding neurovascular pathophysiology following head trauma. Knowledge of early versus late signs of intracranial pressure is essential to identify neurological deterioration and prevent brain herniation. Clinical assessment focuses on mental status changes and autonomic vital sign stability.

Choice A rationale

Tachycardia is typically not a sign of increased intracranial pressure. Instead, Cushing triad occurs as a late sign, characterized by bradycardia, widened pulse pressure, and irregular respirations as the brainstem undergoes significant compression and ischemia.

Choice B rationale

Amnesia is a common finding following traumatic brain injury due to localized tissue damage or concussion. However, it is a static deficit rather than a dynamic indicator of rising pressure within the rigid cranial vault.

Choice C rationale

Hypotension is not an indicator of increased intracranial pressure. In the Cushing response, the body increases systolic blood pressure to maintain cerebral perfusion pressure against the rising resistance of the swelling brain tissue and cerebrospinal fluid.

Choice D rationale

Restlessness is an early sign of increased intracranial pressure resulting from decreased cerebral oxygenation. As pressure rises, the brain becomes hypoxic, leading to agitation, irritability, and decreased level of consciousness before more severe physical signs manifest.