A nurse is preparing to administer a heparin infusion of 25,000 units in 250 mL of normal saline at a rate of 1000 units per hour for a client diagnosed with a Deep Vein Thrombosis (DVT). The client’s initial activated partial thromboplastin time (aPTT) value is 35 seconds.
Which laboratory result would indicate that the aPTT is at a therapeutic level?
30 seconds
45 seconds
60 seconds
75 seconds
The Correct Answer is D
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Consuming excessive amounts of antacids, such as TUMS, can lead to metabolic alkalosis. Antacids contain bicarbonate, which can neutralize stomach acid. However, excessive bicarbonate in the body can disrupt the acid-base balance, leading to metabolic alkalosis.
Choice B rationale
Respiratory acidosis is typically caused by conditions that result in hypoventilation, such as lung diseases or drug overdose, not by excessive antacid consumption.
Choice C rationale
Metabolic acidosis is typically caused by conditions that increase acid in the body or decrease bicarbonate, such as kidney disease or lactic acidosis, not by excessive antacid consumption.
Choice D rationale
Respiratory alkalosis is typically caused by conditions that result in hyperventilation, such as anxiety or fever, not by excessive antacid consumption.
Correct Answer is D
Explanation
Choice A rationale
The infectious agent is the pathogen that causes the disease, and the reservoir is where the infectious agent lives and multiplies. Hand washing does not directly intervene between these two links.
Choice B rationale
The mode of transmission is how the infectious agent travels to other people and places, and the portal of entry is the route by which an infectious agent enters a new host. Hand washing does not directly intervene between these two links.
Choice C rationale
The susceptible host is a person who is vulnerable to the disease, and the infectious agent is the pathogen that causes the disease. Hand washing does not directly intervene between these two links.
Choice D rationale
The portal of exit is the route by which an infectious agent escapes or leaves the reservoir, and the mode of transmission is how the infectious agent travels to other people and places. Hand washing directly intervenes between these two links by removing the infectious agent from the hands (portal of exit) and preventing its transmission to other people or surfaces.
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