The nurse is caring for a patient who has been vomiting and has diarrhea for 3 days and now has muscle weakness and paresthesias in his hands and feet, along with an irregular pulse rate and rhythm, and shallow respirations with crackles on auscultation of his lungs bilaterally. The nurse suspects that these symptoms are most likely due to which electrolyte imbalance?
Hypercalcemia.
Hypokalemia.
Hypermagnesemia.
Hypophosphatemia.
The Correct Answer is B
Choice A: Hypercalcemia. This is a condition of having too much calcium in the blood. It can cause muscle weakness, constipation, nausea, vomiting, confusion, and irregular heartbeat. However, it does not typically cause paresthesias (tingling or numbness), diarrhea, or crackles in the lungs.
Choice B:
Hypokalemia. This is a condition of having too low potassium in the blood. It can cause muscle weakness, paresthesias, irregular heartbeat, shallow respirations, and increased risk of digoxin toxicity (a medication used to treat heart failure) It can also cause vomiting and diarrhea, which can worsen the potassium loss. This choice matches the symptoms of the patient.
Choice C:
Hypermagnesemia. This is a condition of having too much magnesium in the blood. It can cause muscle weakness, nausea, vomiting, low blood pressure, bradycardia (slow heart rate), and respiratory depression. However, it does not usually cause paresthesias, diarrhea, or crackles in the lungs.
Choice D:
Hypophosphatemia. This is a condition of having too low phosphate in the blood. It can cause muscle weakness, bone pain, rickets (softening of bones), and impaired cellular function. However, it does not typically cause paresthesias, irregular heartbeat, shallow respirations, or crackles in the lungs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C","D"]
Explanation
Choice A reason: Pneumothorax: This is a condition where air accumulates in the pleural space, causing the lung to collapse. It can occur during insertion of a central venous catheter if the needle or catheter punctures the lung or the pleura.
Choice B reason:. Air embolism. This is a condition where air bubbles enter the bloodstream and obstruct blood flow. It can occur during insertion, removal or maintenance of a central venous catheter if air enters the catheter or the vein.
Choice C reason:. Catheter-related bloodstream infection. This is an infection that occurs when microorganisms colonize the catheter or the insertion site and enter the bloodstream. It can cause fever, chills, sepsis and other serious complications. It can be prevented by using strict aseptic technique and following infection control guidelines.
Choice D reason:. Catheter occlusion. This is a condition where the catheter lumen becomes blocked by blood clots, fibrin sheaths, precipitates or kinks. It can impair the infusion or withdrawal of fluids and medications. It can be prevented by flushing the catheter regularly with saline or heparin solutions.
Choice E reason: Hematoma formation. This is a condition where blood accumulates under the skin or in the tissues around the insertion site. It can occur due to bleeding from the punctured vein or artery, or from trauma to the site. It can cause pain, swelling, bruising and infection.
Correct Answer is C
Explanation
Choice A reason: This is incorrect because 0.9% sodium chloride (normal saline) is an isotonic solution, not a hypotonic one. Isotonic solutions have the same concentration of solutes as blood plasma and do not cause fluid movement across the cell membrane.
Choice B reason:
This is incorrect because 0.9% sodium chloride (normal saline) is an isotonic solution, not a hypertonic one. Hypertonic solutions have a higher concentration of solutes than blood plasma and cause fluid to move out of the cells and into the vascular space.
Choice C reason:
This is correct because 0.9% sodium chloride (normal saline) is an isotonic solution that will expand the vascular space by adding fluid without changing the concentration of solutes. This is useful for patients with hyponatremia (low sodium level in the blood) who need to restore their fluid and electrolyte balance.
Choice D reason:
This is incorrect because 0.9% sodium chloride (normal saline) is an isotonic solution that will expand the vascular space by adding fluid without changing the concentration of solutes. It will not have no effect on fluid movement, as it will increase the intravascular volume.
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