Difficulty: Medium
Average Score: 93%
Full-length
The nurse is caring for a client who is receiving a continuous IV infusion of heparin. Which of the following laboratory results would be of GREATest concern to the nurse?
Correct answer
A
Rationale
A PTT of 90 seconds is above the therapeutic range for heparin (60ÔÇô80 seconds), increasing bleeding risk, requiring immediate adjustment. Options B, C, and D are normal: INR is unaffected, platelet count 150,000/mm^3 is adequate, and hemoglobin 13 g/dL is normal.