A client has prescriptions for albuterol (Proventil HFA) and salmeterol (Serevent). Which instruction should the nurse provide for this client?

A. At high doses, to treat anaphylaxis: Dopamine is not used to treat anaphylaxis. Anaphylaxis is typically managed with medications such as epinephrine, antihistamines, and corticosteroids.

B. At high doses, to increase cardiac output: Dopamine is a medication commonly used in the treatment of shock, particularly in cases of hypotension. At higher doses, dopamine acts as a positive inotrope and increases cardiac contractility, thereby improving cardiac output and increasing blood pressure.

C. At low doses, to cause increased blood flow to the kidneys: At lower doses, dopamine primarily acts on dopaminergic receptors in the renal vasculature, leading to vasodilation of the renal blood vessels and increased renal perfusion. This can help improve renal blood flow and urine output, making it beneficial in cases of renal hypoperfusion or acute kidney injury.

D. At low doses, to treat anaphylaxis: Dopamine is not used to treat anaphylaxis at any dose. Anaphylaxis is managed with medications such as epinephrine, which acts on multiple receptors to reverse the systemic effects of the allergic reaction.

E. To cause vasoconstriction and increase blood pressure: Dopamine can also cause vasoconstriction, particularly at higher doses. This effect is mediated through its action on alpha-adrenergic receptors, leading to peripheral vasoconstriction and an increase in systemic vascular resistance, which in turn helps increase blood pressure.

A) Cardiogenic shock:
Cardiogenic shock occurs when the heart is unable to pump enough blood to meet the body's needs, often due to myocardial infarction (heart attack) or other conditions affecting the heart's function. The client's history of a recent infection does not align with the etiology of cardiogenic shock.

B) Neurogenic shock:
Neurogenic shock occurs due to dysfunction of the autonomic nervous system, typically as a result of spinal cord injury or severe brain injury. It is characterized by widespread vasodilation and bradycardia. The client's history of a recent infection does not align with the etiology of neurogenic shock.

C) Hypovolemic shock:
Hypovolemic shock occurs due to a significant loss of blood volume, such as from trauma, hemorrhage, or dehydration. While infection can lead to fluid loss and dehydration in some cases, the client's history of a recent infection suggests a different etiology, specifically septic shock, which is driven by the systemic inflammatory response to infection.

D) Septic shock.
Septic shock is a type of distributive shock caused by a systemic response to infection. It occurs when an infection triggers a widespread inflammatory response, leading to vasodilation, increased capillary permeability, fluid loss from the bloodstream, and impaired tissue perfusion. The client's history of a recent infection suggests that the shock may be septic in nature.