Complete the following sentence with one of the options regarding the pathophysiology of this type of shock.
The nurse is caring for an elderly patient from a nursing home diagnosed with a urinary tract infection. The nurse assesses the patient as hypotensive, tachycardic, febrile, tachypneic, and with an altered mental status. The nurse understands that the pathophysiology of this type of shock is caused by___

A. Massive blood loss leading to decreased oxygen delivery to tissues

This describes hypovolemic shock, which occurs due to significant blood or fluid loss (e.g., hemorrhage, severe dehydration). In this scenario, there is no evidence of massive blood loss, making hypovolemic shock unlikely.

B. Severe allergic reaction causing systemic vasodilation and increased capillary permeability

This describes anaphylactic shock, which results from an acute allergic reaction (e.g., to food, medication, insect stings). There is no mention of an allergen exposure or symptoms like wheezing, stridor, or urticaria, making anaphylactic shock unlikely.

C. Infection causing a systemic inflammatory response leading to vasodilation and decreased tissue perfusion

This patient is exhibiting signs of septic shock, which occurs as a result of a severe infection leading to systemic inflammatory response syndrome (SIRS). The presence of fever, tachycardia, tachypnea, hypotension, and altered mental status strongly suggests sepsis progressing to septic shock.

D. Cardiac failure resulting in inadequate tissue perfusion and oxygenation

This describes cardiogenic shock, which occurs due to heart failure (e.g., from myocardial infarction, cardiomyopathy). It leads to low cardiac output, pulmonary congestion, and organ hypoperfusion. This patient’s infection and systemic inflammation suggest septic shock, not a primary cardiac event.