Which assessment finding indicates that the patient is at high risk for development of pulmonary embolism?
The patient’s last bowel movement was before surgery, 4 days ago.
The patient has refused enoxaparin injections after surgery.
The patient’s platelet count was 45,000/mm^3 this morning.
The patient required transfusion of two units of packed red blood cells.
The Correct Answer is B
Choice A rationale:
A patient's last bowel movement being 4 days ago does not directly increase their risk of pulmonary embolism (PE). While constipation can be a risk factor for deep vein thrombosis (DVT), which can lead to PE, it is not a significant risk factor on its own.
It's important to assess for other risk factors for DVT, such as immobility, recent surgery, or a history of blood clots, in conjunction with constipation.
Choice C rationale:
A platelet count of 45,000/mm^3 is low (thrombocytopenia), but it does not directly increase the risk of PE.
In fact, a low platelet count can sometimes hinder clot formation. However, it's important to monitor patients with thrombocytopenia for bleeding risks, as they may be more prone to bleeding complications.
Choice D rationale:
While receiving a transfusion of two units of packed red blood cells can increase blood viscosity, which could theoretically slightly increase the risk of PE, it is not a major risk factor.
Patients who receive transfusions are often already at an elevated risk of PE due to other underlying conditions or surgeries. It's essential to assess for other risk factors in these patients.
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Naxlex Comprehensive Predictor Exams
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Correct Answer is D
Explanation
Choice A rationale:
Aspirating prior to injecting enoxaparin is not recommended.
Aspiration was once a common practice to check if a needle had entered a blood vessel.
However, research has shown that aspiration is not necessary for subcutaneous injections and may even be harmful. It can cause pain, bruising, and hematoma formation.
Additionally, aspirating can increase the risk of needlestick injuries.
For these reasons, aspiration is no longer recommended for subcutaneous injections of enoxaparin or other anticoagulants.
Choice B rationale:
Massaging the injection site after administering enoxaparin is not recommended. Massaging can increase the risk of bruising and hematoma formation.
It can also cause the medication to be absorbed too quickly, which can increase the risk of bleeding.
The best practice is to apply gentle pressure to the injection site with a dry gauze pad for a few seconds after the injection. This will help to prevent bleeding and bruising.
Choice C rationale:
The size of the syringe and needle used to administer enoxaparin is not specified in the question. However, a 1-mL syringe with a 32-gauge needle is a common choice for subcutaneous injections.
This size syringe is small enough to be easy to handle, and the 32-gauge needle is thin enough to minimize discomfort.
Choice D rationale:
The abdomen is the preferred site for subcutaneous injections of enoxaparin.
The abdomen has a large surface area of soft tissue, which makes it easy to inject the medication.
The abdomen is also relatively free of blood vessels and nerves, which reduces the risk of bruising, bleeding, and pain. Other potential injection sites for enoxaparin include the upper arms, thighs, and buttocks.
However, the abdomen is generally the preferred site.
Correct Answer is B
Explanation
Choice A rationale:
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