A healthcare professional is monitoring a client following a thoracentesis. The healthcare professional should identify which of the following manifestations as a complication and contact the provider immediately?
Correct Answer: C
Rationale: The correct answer is C, increased heart rate, as it indicates a potential complication such as hemorrhage or pneumothorax post-thoracentesis. An increased heart rate can signify hypovolemia or respiratory distress, requiring immediate provider notification. Serosanguineous drainage (A) is expected initially, discomfort (B) is common, and decreased temperature (D) is not typically a complication post-thoracentesis.