The nurse is caring for a patient admitted with shock and understands that which of the following assessment findings best assess tissue perfusion? (Select all that apply.)

Rationale: A. Level of consciousness is correct because changes in mental status are often the earliest and most sensitive indicator of inadequate cerebral perfusion. Confusion, agitation, or lethargy can reflect decreased oxygen delivery to the brain in shock. B. Respirations are incorrect as a direct measure of tissue perfusion. While compensatory tachypnea may occur in shock due to metabolic acidosis or hypoxemia, respiratory rate primarily reflects oxygenation and acid-base status rather than systemic tissue perfusion. C. Heart rate is correct because tachycardia is a compensatory response to maintain cardiac output and perfusion in shock. Persistent changes can indicate ongoing inadequate tissue perfusion. D. Blood pressure is correct because hypotension reflects decreased systemic perfusion pressure, though BP may initially remain normal in early (compensated) shock due to vasoconstriction. It remains an important indicator of perfusion when combined with other findings. E. Pupil response is incorrect as a primary indicator of tissue perfusion. While abnormal pupil responses may indicate neurological compromise, they are not reliable for assessing systemic perfusion in shock. F. Urine output is correct because the kidneys are sensitive to changes in perfusion. Oliguria (<0.5 mL/kg/hr) is an early sign of poor renal perfusion in shock and reflects decreased blood flow to tissues.