The nurse is caring for a client who is being evaluated for possible deep vein thrombosis of the right extremity. Which laboratory result is of most concern to the nurse?
Activated Partial Thromboplastin Time (aPTT) of 25.
D-dimer of 500 ng/mL.
Prothrombin Time (PT) of 14 seconds.
Platelet count of 148,000 uL.
The Correct Answer is B
Choice A rationale
Activated Partial Thromboplastin Time (aPTT) of 25 is within the normal range (25-35 seconds) and is not directly related to deep vein thrombosis (DVT)89.
Choice B rationale
A D-dimer level of 500 ng/mL is elevated (normal range is typically less than 250 ng/mL), which can indicate the presence of a clot, such as in DVT8910.
Choice C rationale
Prothrombin Time (PT) of 14 seconds is within the normal range (11-13.5 seconds) and is not directly related to DVT89.
Choice D rationale
A platelet count of 148,000 uL is within the normal range (150,000-450,000 uL) and is not directly related to DVT89.
Nursing Test Bank
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Related Questions
Correct Answer is D
Explanation
Choice A rationale
The Trendelenburg position, with the stump supported on three pillows, is not typically recommended following a below-the-knee amputation. This position could increase the risk of contractures.
Choice B rationale
Side lying with the amputated leg flexed is not typically recommended following a below-the- knee amputation. This position could increase the risk of contractures.
Choice C rationale
Lying prone for 24 hours is not typically recommended following a below-the-knee amputation. While some prone positioning may be beneficial to prevent hip flexion contractures, it should not be the only position used.
Choice D rationale
The supine position, with the stump flat on the bed, is often recommended following a below- the-knee amputation. This position helps to prevent contractures and promotes healing.
Correct Answer is D
Explanation
Step 1 is to understand the therapeutic range for aPTT when a patient is on heparin therapy. The therapeutic range for aPTT is 1.5 to 2.5 times the normal value. Given that the normal aPTT value is around 30-40 seconds, the therapeutic range would be approximately 45-100 seconds. Therefore, an aPTT value of 75 seconds falls within this therapeutic range, indicating that the heparin therapy is effective.
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