Heparin is supplied in bags that have 25,000 units / 250 mL. What is the concentration of Heparin?
1 unit per 1mL
10 units per 1 mL
100 units per 1 mL
1000 units per 1 mL
The Correct Answer is C
A. If the concentration were 1 unit/mL, then in 250 mL there would only be 250 units total, which is much lower than the provided 25,000 units.
B. If the concentration were 10 units/mL, then in 250 mL there would be 2,500 units total, which is also much lower than the provided 25,000 units.
C. If the concentration were 100 units/mL, then in 250 mL there would be 25,000 units total, which matches the provided information. However, while this seems plausible, it is not the answer we calculated.
D. If the concentration were 1,000 units/mL, then in 250 mL there would be 250,000 units total, which is significantly higher than the 25,000 units provided.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. A mass in the mediastinum can compress the trachea or major blood vessels, leading to shortness of breath, particularly when the patient is in a supine position (lying flat). This symptom is indicative of significant obstruction or compression, making it a key sign.
B. While lymphadenopathy (swelling of lymph nodes) is a hallmark of Hodgkin's Lymphoma, it does not specifically indicate the presence of a mediastinal mass. Lymph nodes can swell throughout the body, including cervical, axillary, and inguinal regions, but this symptom is more general and not exclusive to mediastinal involvement.
C. Low-grade fevers can occur in Hodgkin's Lymphoma due to systemic effects of the cancer, such as cytokine release. However, this symptom is nonspecific and does not directly indicate a mediastinal mass. It is more indicative of the body's response to cancer rather than localized effects.
D. Drenching night sweats are another common systemic symptom associated with Hodgkin's Lymphoma. Like low-grade fevers, night sweats are part of the B symptoms that can occur with lymphoma but are not specifically indicative of a mediastinal mass.
Correct Answer is D
Explanation
A. This choice suggests a high-stress job but includes a positive aspect—regular exercise. Regular physical activity is protective against stroke, and being active can help mitigate some risk factors. Therefore, this scenario does not indicate a high risk for stroke.
B. This choice does not present a significant risk factor for stroke. An uncomplicated vaginal birth is typically not associated with an increased risk of stroke. Factors like recent pregnancy could increase risk due to changes in blood coagulation, but 12 years post-birth is not relevant.
C. Moderate alcohol consumption, such as a glass of red wine, may have some cardiovascular benefits when done in moderation, and practicing yoga can be beneficial for stress reduction and overall health. Therefore, this option does not suggest a high risk for stroke.
D. Both smoking and the use of birth control pills significantly increase the risk of stroke, particularly in women. Smoking is a well-known risk factor for cardiovascular disease and can lead to thrombosis (blood clots).
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