A nurse is caring for a client who has a pulmonary embolism. The nurse should identify that the release of inflammatory mediators leads to which of the following pathologic findings?
Decreased pulmonary vascular resistance
Hypercapnia
Hypoventilation
Respiratory alkalosis
The Correct Answer is D
Correct answer: D
Choice A Reason:
Decreased pulmonary vascular resistance is incorrect. Inflammatory mediators released in response to a pulmonary embolism can lead to vasoconstriction and increased pulmonary vascular resistance. This is part of the body's response to redirect blood flow away from the affected area of the lung and maintain adequate perfusion to other areas.
Choice B Reason:
Hypercapnia is incorrect. Hypercapnia refers to elevated levels of carbon dioxide (CO2) in the blood. Hypocapnia usually is present with embolism; hypercapnia, on the other hand, is rare.
Choice C Reason:
Hypoventilation is incorrect. Hypoventilation occurs when there is inadequate ventilation of the lungs relative to metabolic demands. In the context of a pulmonary embolism, hypoventilation can occur due to factors such as pain, respiratory muscle fatigue, or impaired gas exchange, all of which can be influenced by the release of inflammatory mediators.
Choice D Reason:
Respiratory alkalosis is correct. In response to the blockage and the resulting inflammation, the body often increases the respiratory rate as a compensatory mechanism to maintain adequate oxygen levels and remove carbon dioxide. Due to the increased breathing rate, there is excessive exhalation of carbon dioxide, leading to a decrease in the partial pressure of CO2 in the blood. This results in an increase in blood pH, causing respiratory alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason:
Myelogram is not appropriate. This imaging test involves injecting contrast dye into the spinal canal to visualize the spinal cord and nerve roots. While it may help identify certain spinal cord abnormalities, it is not typically used as a primary diagnostic tool for multiple sclerosis.
Choice B Reason:
Brain natriuretic peptide (BNP) is not appropriate. This blood test measures the level of BNP, a hormone produced by the heart, which can be elevated in conditions such as heart failure. It is not used in the diagnosis of multiple sclerosis.
Choice C Reason:
Troponin level is not appropriate. Troponin is a protein released into the bloodstream during a heart attack or other heart-related conditions. This test is used to diagnose heart muscle damage and is not relevant to the diagnosis of multiple sclerosis.
Choice D Reason:
Lumbar puncture is appropriate. Also known as a spinal tap, a lumbar puncture involves collecting cerebrospinal fluid (CSF) from the spinal canal for analysis. In the diagnosis of multiple sclerosis, analysis of CSF can help identify certain abnormalities, such as an elevated level of immunoglobulin G (IgG) or the presence of oligoclonal bands, which are often indicative of inflammation in the central nervous system. Therefore, a lumbar puncture is commonly ordered to assist with the diagnosis of multiple sclerosis.
Correct Answer is C
Explanation
Choice A Reason:
Paralytic ileus is incorrect. Paralytic ileus is a condition characterized by obstruction of the intestines due to paralysis of the intestinal muscles, resulting in symptoms such as abdominal pain, bloating, and constipation. Paralytic ileus is not typically associated with cauda equina syndrome, which primarily affects the nerves in the lower back and lower extremities.
Choice B Reason:
Blood pressure 80/48 mm Hg is incorrect. While cauda equina syndrome can cause neurological symptoms such as lower extremity weakness, numbness, and bowel or bladder dysfunction, it is not typically associated with alterations in blood pressure. Blood pressure changes may occur in response to pain or other systemic factors, but they are not specific to cauda equina syndrome.
Choice C Reason:
Weakness in one or both legs is correct. Yes, weakness in one or both legs is a characteristic finding of cauda equina syndrome. Compression of the nerve roots in the lower spinal cord can lead to motor deficits, including weakness, difficulty walking, and loss of reflexes in the lower extremities.
Choice D Reason:
Potassium 3.2 mEq/L is incorrect. Serum potassium levels are not typically associated with cauda equina syndrome. Abnormal potassium levels may be indicative of electrolyte imbalances, which can occur in various medical conditions but are not specific to cauda equina syndrome.
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