Match the following conditions to the associated primary electrolyte imbalance:

(A) Hydrochlorothiazide: A thiazide diuretic used for hypertension, not ICP.

(B) Spironolactone: A potassium-sparing diuretic used for heart failure, not ICP.

(C) Furosemide: A loop diuretic that reduces fluid overload but is not the first choice for ICP management.

(D) Mannitol: An osmotic diuretic that reduces brain swelling by drawing fluid out of the brain and into the bloodstream.

Cushing’s Syndrome → Dexamethasone Suppression Test

• Cushing’s Syndrome results from excess cortisol. The dexamethasone suppression test evaluates whether cortisol production is appropriately suppressed by exogenous steroids.

Addison’s Disease → ACTH Stimulation Test

• Addison’s Disease involves adrenal insufficiency. The ACTH stimulation test checks if the adrenal glands can produce cortisol when stimulated.

Graves’ Disease → TSH Receptor Antibody Test

• Graves’ Disease is an autoimmune hyperthyroid condition where autoantibodies stimulate the thyroid. The TSH receptor antibody test detects these autoantibodies.

Diabetes Insipidus → Water Deprivation Test

• Diabetes Insipidus causes excessive urination due to ADH deficiency or resistance. The water deprivation test assesses the kidneys' ability to concentrate urine in response to dehydration.

Hashimoto’s Thyroiditis → Antithyroid Antibody Test

• Hashimoto’s Thyroiditis is an autoimmune hypothyroid disorder characterized by elevated antithyroid antibodies.