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A client is receiving continuous IV heparin for the diagnosis of pulmonary embolism (PE). Which observation by the nurse requires the IV to be stopped and a STAT aPTT level performed?
A. Chills with pain and numbness in arms and legs.
B. Coughing productive of blood-tinged sputum.
C. Client complains of a headache and is sweaty.
D. Pinpoint-sized red and purple spots on the client's arms and legs.