A nurse is providing care for a client who has diabetes insipidus (DI). Which of the following is a cause of acquired central diabetes insipidus?

Hypokalemia

Surgery

Renal failure

Sickle cell disease

Answer and Explanation

The Correct Answer is B

Choice A Reason:

Hypokalemia, or low potassium levels, is not a direct cause of central diabetes insipidus. Central diabetes insipidus is primarily related to issues with the production or release of antidiuretic hormone (ADH) from the hypothalamus or pituitary gland. Hypokalemia can affect kidney function but does not typically cause central diabetes insipidus.

Choice B Reason:

Surgery, particularly brain surgery, can cause central diabetes insipidus by damaging the hypothalamus or pituitary gland. These structures are crucial for the production and release of ADH, which regulates water balance in the body. Damage to these areas during surgery can lead to a deficiency in ADH, resulting in central diabetes insipidus.

Choice C Reason:

Renal failure is not a cause of central diabetes insipidus. While renal failure affects the kidneys’ ability to filter waste and balance fluids, central diabetes insipidus is related to a deficiency in ADH production or release. Renal failure can lead to other types of diabetes insipidus, such as nephrogenic diabetes insipidus, where the kidneys do not respond properly to ADH.

Choice D Reason:

Sickle cell disease is not a direct cause of central diabetes insipidus. Sickle cell disease primarily affects red blood cells and can lead to various complications, including kidney damage. However, it does not typically cause central diabetes insipidus, which is related to issues with ADH production or release.

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Correct Answer is B

Explanation

Choice A reason: Increased Serum Sodium

Increased serum sodium, or hypernatremia, is not consistent with SIADH. SIADH typically results in hyponatremia, which is a low level of sodium in the blood due to excessive water retention. The excess antidiuretic hormone (ADH) causes the kidneys to retain water, diluting the sodium in the bloodstream. Therefore, increased serum sodium is not a characteristic finding in SIADH.

Choice B reason: Decreased Serum Osmolality

Decreased serum osmolality is a hallmark of SIADH3. Serum osmolality measures the concentration of solutes in the blood. In SIADH, the excessive release of ADH leads to water retention, diluting the blood and lowering serum osmolality. This is a key diagnostic feature of SIADH and helps differentiate it from other conditions.

Choice C reason: Decreased Urinary Sodium

Decreased urinary sodium is not typically seen in SIADH. In fact, patients with SIADH usually have increased urinary sodium levels. This is because the kidneys excrete more sodium in an attempt to balance the excess water retained due to high ADH levels. Therefore, decreased urinary sodium is not consistent with SIADH.

Choice D reason: Decreased Urine Osmolality

Decreased urine osmolality is also not consistent with SIADH. In SIADH, urine osmolality is typically increased because the kidneys concentrate the urine due to the action of ADH. The high levels of ADH cause the kidneys to reabsorb water, resulting in more concentrated urine. Thus, decreased urine osmolality is not a characteristic finding in SIADH.

A. Coronary arteries become more elastic, causing the arteries to stretch as individuals age, leading to the heart not receiving enough oxygen. B. Coronary arteries decrease in diameter, leading to insufficient blood, oxygen, and nutrients reaching the heart muscle. C. Coronary arteries decrease in diameter, leading to insufficient blood, oxygen, and nutrients reaching the heart muscle. D. Manifestations occur due to dilation of coronary arteries with increased blood flow causing increased pressure. E. The heart and the coronary arteries weaken, leading to poor perfusion and resulting in angina.

Correct Answer is B

Explanation

Choice A Reason:

Coronary arteries do not become more elastic with age. Instead, they tend to become less elastic due to the buildup of plaque, a condition known as atherosclerosis. This buildup narrows the arteries and restricts blood flow, which can lead to coronary artery disease (CAD). The heart not receiving enough oxygen is a result of this narrowing, not increased elasticity.

Choice B Reason:

Coronary arteries decrease in diameter due to the buildup of plaque, which consists of fats, cholesterol, and other substances. This narrowing restricts the flow of blood, oxygen, and nutrients to the heart muscle, leading to symptoms such as chest pain (angina) and shortness of breath. This is the primary mechanism behind coronary artery disease.

Choice C Reason:

This choice is essentially a repetition of Choice B and is correct for the same reasons. The narrowing of the coronary arteries due to plaque buildup leads to insufficient blood flow, causing the heart muscle to receive less oxygen and nutrients.

Choice D Reason:

Manifestations of coronary artery disease are not due to the dilation of coronary arteries. Instead, they are due to the narrowing of these arteries. Increased blood flow and pressure are not typical causes of CAD symptoms. The primary issue is the restricted blood flow due to narrowed arteries.

Choice E Reason:

While it is true that the heart and coronary arteries can weaken over time, leading to poor perfusion and angina, this statement does not accurately describe the primary mechanism of coronary artery disease. The main issue in CAD is the narrowing of the arteries due to plaque buildup, which restricts blood flow to the heart muscle.

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A nurse is providing care for a client who has diabetes insipidus (DI). Which of the following is a cause of acquired central diabetes insipidus?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is providing care for a client who has the syndrome of inappropriate antidiuretic hormone (SIADH). Which of the following findings is consistent with a diagnosis of SIADH?

Correct Answer is B

Explanation

A nurse is providing teaching to a client who has coronary artery disease. Which of the following statements should the nurse include in the teaching to explain the correlation between changes in the coronary arteries and manifestations that occur?

Correct Answer is B

Explanation

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