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?

Choice A reason: Decreased Body Temperature

Decreased body temperature is not typically associated with hyperthyroidism. In fact, hyperthyroidism often causes an increase in body temperature due to the accelerated metabolic rate. Patients with hyperthyroidism may experience heat intolerance and excessive sweating, but not a decrease in body temperature.

Choice B reason: Tachycardia

Tachycardia, or an abnormally fast heart rate, is a common symptom of hyperthyroidism. The elevated levels of thyroid hormones (T4 and T3) increase the body’s metabolism, leading to an increased heart rate. This can result in palpitations and a feeling of a racing heart, which are characteristic signs of hyperthyroidism. Therefore, tachycardia is the most likely vital sign abnormality in this scenario.

Choice C reason: Hypotension

Hypotension, or low blood pressure, is not typically associated with hyperthyroidism. Instead, hyperthyroidism can sometimes cause an increase in blood pressure due to the heightened metabolic activity and increased cardiac output4. Therefore, hypotension is not a characteristic finding in patients with elevated thyroid hormone levels.

Choice D reason: Slow Respiratory Rate

A slow respiratory rate is not commonly seen in hyperthyroidism. The condition usually leads to an increased respiratory rate due to the body’s heightened metabolic demands. Patients with hyperthyroidism may experience shortness of breath and rapid breathing, but not a slow respiratory rate.

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.