A pediatric oncology patient's implanted port is accessed for chemotherapy but there is no blood return despite easy flush. Which action is CONTRAINDICATED?
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A
Repositioning the patient and asking them to cough
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B
Performing a fluoroscopic dye study to assess tip position
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C
Forcefully flushing with a 10 mL syringe at high pressure to clear the occlusion
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D
Instilling alteplase and allowing a 30-minute dwell