Final answer:
In a patient with heat stroke, the main clinical manifestation a nurse should expect is the absence of sweating. Heat stroke disrupts the body's sweating mechanism, leading to increased body temperature.
Step-by-step explanation:
When assessing a client with heat stroke, the nurse should primarily expect to observe the absence of sweating. Heat stroke, a form of hyperthermia, is characterized by an elevated body temperature, generally above 104°F (40°C), and a disruption of sweating mechanism. Although nausea and vomiting can occur, they are not considered the primary clinical manifestations. Pale and clammy skin and pharyngitis are typically related to other conditions and are not typically associated with heat stroke. Therefore, the most indicative clinical manifestation for a heat stroke patient would be absence of sweating.
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