Organ failure associated with multiple organ dysfunction syndrome (MODS) usually begins in which organ?

Liver

Lungs

Brain

Kidneys

Answer and Explanation

The Correct Answer is B

A. Liver: The liver is commonly affected in MODS but typically later in the progression. Hepatic dysfunction results from prolonged hypoperfusion and inflammatory mediators rather than being the initial site of organ failure. Early failure usually occurs in more vulnerable organs.

B. Lungs: The lungs are usually the first organ to show signs of dysfunction in MODS, often manifesting as acute respiratory distress syndrome (ARDS). They are highly sensitive to hypoperfusion and inflammatory cytokines. Early pulmonary involvement can compromise oxygenation and exacerbate other organ failures.

C. Brain: Neurological changes, such as confusion or altered mental status, occur later in MODS as hypoxia and metabolic disturbances progress. The brain is affected after primary organs like the lungs and heart begin to fail. Early MODS rarely presents initially with brain dysfunction.

D. Kidneys: Renal failure is common in MODS but generally occurs after the lungs and cardiovascular system are affected. Reduced perfusion and hypoxia contribute to acute kidney injury. It is not the typical first organ to fail in the sequence of MODS.

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Correct Answer is B

Explanation

A. Cardiac tamponade: Cardiac tamponade typically presents with hypotension, jugular venous distension, and muffled heart sounds (Beck’s triad). While shortness of breath may occur, the use of accessory muscles is not a defining feature. Chest pain is usually retrosternal and not always associated with respiratory distress.

B. Pneumothorax: Pneumothorax presents with chest pain, dyspnea, and increased use of accessory muscles due to impaired lung expansion. These signs indicate compromised ventilation and decreased oxygenation. Trauma is a common cause, making this a likely condition. Rapid assessment and intervention are essential.

C. Aspiration: Aspiration can cause sudden coughing, choking, and possible hypoxia, but it is not typically associated with chest trauma or immediate accessory muscle use. It is less likely in the context of a motor vehicle accident.

D. Splenic laceration: Splenic injury usually presents with left upper quadrant abdominal pain, referred shoulder pain, and signs of internal bleeding such as hypotension and tachycardia. Respiratory distress and accessory muscle use are not typical features.

A. Hyperkalemia and hypernatremia B. Hypokalemia and hypernatremia C. Hyperkalemia and hyponatremia D. Hypokalemia and hyponatremia

Correct Answer is D

Explanation

A. Hyperkalemia and hypernatremia: During the diuretic phase, the kidneys excrete large volumes of urine, leading to loss of potassium and sodium. Hyperkalemia and hypernatremia are more characteristic of the oliguric phase of AKI.

B. Hypokalemia and hypernatremia: Although potassium is lost, sodium loss also occurs during the diuretic phase, making hypernatremia unlikely. Sodium depletion can result from excessive urinary losses.

C. Hyperkalemia and hyponatremia: Hyperkalemia is typically seen in the oliguric phase. In the diuretic phase, potassium is excreted in large amounts, making hypokalemia more common.

D. Hypokalemia and hyponatremia: The diuretic phase causes high urine output with excessive loss of electrolytes. Both potassium and sodium are depleted, putting the client at risk for hypokalemia and hyponatremia. Monitoring and replacement are essential.

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Organ failure associated with multiple organ dysfunction syndrome (MODS) usually begins in which organ?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

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Correct Answer is D

Explanation

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