A nurse is caring for an older adult client in the emergency department who sustained a head injury due to a fall. Which of the following are common reasons for head injuries in older adults?
(Select All that Apply.)

Choice A Reason:

Hypoxemia due to dead space is not appropriate. Dead space refers to areas of the lung where ventilation occurs but no perfusion takes place. In ARDS, hypoxemia typically occurs due to ventilation-perfusion (V/Q) mismatch and shunting rather than dead space.

Choice B Reason:

Impaired carbon dioxide elimination due to shunting is not appropriate. Shunting occurs when blood bypasses ventilated alveoli, leading to inadequate gas exchange. In ARDS, shunting contributes to hypoxemia, but it doesn't directly impair carbon dioxide elimination.

Choice C Reason:

Decreased pulmonary arterial pressure due to ventilation-perfusion (V/Q) mismatch is incorrect. V/Q mismatch occurs when ventilation and perfusion are mismatched in different areas of the lung. This leads to areas of low ventilation (dead space) and areas of low perfusion (shunting). V/Q mismatch contributes to hypoxemia in ARDS but does not typically lead to decreased pulmonary arterial pressure.

Choice D Reason:

Decreased pulmonary compliance due to stiffness is correct. This is a characteristic feature of ARDS. The inflammation and damage to the alveoli cause them to become stiff, reducing pulmonary compliance and impairing lung expansion during ventilation.

Choice A Reason:

Metoprolol is incorrect. Metoprolol is a beta-blocker medication commonly used to treat conditions such as hypertension, angina, and heart failure. However, in the context of neurogenic shock following a spinal cord injury, the use of beta-blockers such as metoprolol is generally contraindicated. Beta-blockers antagonize the effects of sympathetic activation, leading to a reduction in heart rate and myocardial contractility, which can exacerbate hypotension and bradycardia, the hallmarks of neurogenic shock. Therefore, the nurse would not anticipate a prescription for metoprolol in the management of neurogenic shock.

Choice B Reason:

Lactated Ringers intravenous fluid is correct. Fluid resuscitation with isotonic crystalloid solutions such as lactated Ringers is essential to restore intravascular volume and improve perfusion.

Choice C Reason:

Furosemide is incorrect. Furosemide is a loop diuretic medication commonly used to treat conditions such as heart failure, edema, and hypertension by promoting diuresis and reducing fluid volume. However, in the context of neurogenic shock, the use of diuretics such as furosemide is generally not indicated unless there is concurrent volume overload. Neurogenic shock is characterized by hypotension due to vasodilation and decreased systemic vascular resistance, often leading to relative hypovolemia rather than volume overload. Therefore, administering furosemide could further decrease intravascular volume, exacerbating hypotension and compromising perfusion. As a result, the nurse would not anticipate a prescription for furosemide in the management of neurogenic shock.:

Choice D Reason:

Dopamine is correct. Dopamine is a vasopressor medication that acts to increase vascular tone and blood pressure by stimulating alpha-adrenergic receptors. It is commonly used in the management of neurogenic shock to augment blood pressure.

Choice E Reason:

Epinephrine is correct. Epinephrine is a potent vasopressor that acts on both alpha and beta-adrenergic receptors, leading to vasoconstriction and increased cardiac output. It is used in the treatment of refractory hypotension in neurogenic shock.