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What is the most accurate tool for assessing and diagnosing venous thrombosis?
- A. Ascending contrast venography
- B. Duplex venous ultrasonography
- C. Magnetic resonance imaging
- D. Plethysmography
Correct Answer: B
Rationale: Duplex venous ultrasonography is the most accurate tool for assessing and diagnosing venous thrombosis. It is a non-invasive imaging technique that combines Doppler flow studies with conventional ultrasonography. This allows for the visualization of blood flow in the veins and identification of any blood clots or obstructions. Duplex venous ultrasonography is highly sensitive and specific for detecting deep vein thrombosis (DVT) in the lower extremities, making it the preferred imaging modality for diagnosing venous thrombosis. Other imaging modalities like ascending contrast venography, magnetic resonance imaging, and plethysmography are less commonly used due to their disadvantages compared to duplex venous ultrasonography such as invasiveness, cost, and lower accuracy.
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The nurse is assessing a client who is in the third trimester of pregnancy. Which finding would require immediate intervention by the nurse?
- A. Blood pressure of 142/92 mmHg
- B. Pulse of 92 beats per minute
- C. Respiratory rate of 24 per minute
- D. Weight gain of 16 oz per week
Correct Answer: A
Rationale: A blood pressure of 142/92 mmHg in a client in the third trimester of pregnancy is elevated and could indicate the development of preeclampsia, a serious hypertensive disorder that can have adverse effects on both the mother and the fetus. Preeclampsia is characterized by high blood pressure accompanied by signs of organ damage, such as proteinuria and changes in other laboratory values. Immediate intervention is required in this situation, as preeclampsia can lead to complications such as seizures (eclampsia), stroke, and placental abruption. It is essential for the nurse to further assess the client and notify the healthcare provider promptly for appropriate management.
A patient has been vomiting for 4 hours. Which hormone will increase secretion in response to the physiologic changes caused by the vomiting?
- A. ADH
- B. Renin
- C. Thyroxin
- D. Aldosterone
Correct Answer: D
Rationale: Vomiting can lead to dehydration and electrolyte imbalances due to the loss of fluids and electrolytes. In response to these physiologic changes caused by vomiting, aldosterone secretion will increase. Aldosterone is a hormone produced by the adrenal glands that acts on the kidneys to increase reabsorption of sodium and water, helping to maintain blood pressure and electrolyte balance. By increasing aldosterone secretion, the body aims to retain more sodium and water to counteract the effects of vomiting and prevent dehydration.
A nurse is caring for a client who was involved in a motor vehicle accident and has lost approximately 1,550 mL of blood. The nurse should recognize that the client's shock will be classified as:
- A. Class I
- B. Class II
- C. Class III
- D. Class IV
Correct Answer: C
Rationale: Class III hemorrhagic shock typically involves the loss of 1,500-2,000 mL of blood, which aligns closely with the approximately 1,550 mL of blood lost by the client in this scenario. Class III shock is considered severe and can lead to significant physiological consequences, including decreased blood pressure, increased heart rate, altered mental status, and potential organ dysfunction. Therefore, based on the amount of blood loss and severity of symptoms, the client's shock would be classified as Class III.
During an assessment, the nurse decides to assess a patient’s calcium level. Which action will the nurse take to identify a low calcium level?
- A. Palpate turgor of skin
- B. Observe the color of the skin
- C. Conduct a Trousseau’s sign test
- D. Save urine to measure 17-ketosteroids
Correct Answer: C
Rationale: The Trousseau’s sign test is used to identify low calcium levels in a patient. This test involves inflating a blood pressure cuff on the patient's arm above systolic pressure for a few minutes, which can trigger a carpal spasm (wrist and hand flexion) in patients with low calcium levels (hypocalcemia). This is due to increased neuromuscular irritability caused by low calcium levels. Therefore, conducting a Trousseau’s sign test is the appropriate action to identify a low calcium level in a patient. Palpating turgor of skin, observing the color of the skin, and saving urine to measure 17-ketosteroids are not relevant actions for assessing calcium levels.
A client is prescribed enalapril (Vasotec) for treatment of heart failure. Which adverse effect should the nurse assess for following the initial administration of this drug?
- A. Jaundice
- B. Ototoxicity
- C. Low blood pressure
- D. Blurred vision
Correct Answer: C
Rationale: Enalapril is an angiotensin-converting enzyme (ACE) inhibitor commonly used in the treatment of heart failure. One of the potential adverse effects of ACE inhibitors, including enalapril, is hypotension or low blood pressure. This is especially a concern following the initial administration of the drug, as it can cause a significant drop in blood pressure. Nurses should assess the patient for signs and symptoms of hypotension, such as dizziness, light-headedness, weakness, or fainting, after starting enalapril therapy. Monitoring blood pressure regularly and educating the patient about the possibility of low blood pressure is important to ensure patient safety and optimal outcomes.