Which of the following would be a clear symptom of shock?

Decreased urine output is indeed a clear symptom of shock. During shock, the body's tissues and organs do not receive enough blood flow and oxygen, leading to a state of hypoperfusion. The kidneys are particularly sensitive to this condition; when they receive insufficient blood flow, their ability to filter and excrete waste diminishes, resulting in decreased urine output. This symptom can be an important indicator of the severity of the patient's condition and helps guide medical responses.

In contrast, high pulse oximetry readings typically indicate that oxygen levels in the blood are adequate, which would not align with a state of shock. Stable vital signs suggest an absence of significant physiological stress, making it less likely that shock is present. An increased body temperature may occur in other medical conditions, but is not a typical symptom of shock itself, which usually presents with lower peripheral perfusion and can often lead to hypothermia in severe cases. Understanding these distinctions is key in assessing a patient who may be experiencing shock.