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A client is at risk for pulmonary embolism and is on anticoagulant therapy with warfarin sodium. The client's prothrombin time is 20 seconds, with a control of 11 seconds. How should the nurse interpret these results? 1.The client needs to have the test repeated. 2.Client results are within the therapeutic range. 3.Client results are higher than the therapeutic range. 4.Client results are lower than the needed therapeutic level.

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