A 6 1 -year male banker, Tom J ones, was in good health until he lost control of his car, hit a…

A 6 1 -year male banker, Tom J ones, was in good health until he lost control of his car, hit a light pole, and suffered head trauma. While hospitalized in the intensive ca re unit during recovery, he developed hospital-acquired pneumonia. During his long hospitalization, Tom began to show signs of depression and was treated with a selective serotonin reu ptake inhibitor. His depression was not lessened in 2 weeks and the dosage of the antidepressant was increased. Six days after his dosage increase, his nurse noted the patient exhibited confusion and lethargy. Tom 's blood pressure
» A 6 1 -year male banker, Tom J ones, was in good health until he lost control of his car, hit a light pole, and suffered head trauma. While hospitalized in the intensive ca re unit during recovery, he developed hospital-acquired pneumonia. During his long hospitalization, Tom began to show signs of depression and was treated with a selective serotonin reu ptake inhibitor. His depression was not lessened in 2 weeks and the dosage of the antidepressant was increased. Six days after his dosage increase, his nurse noted the patient exhibited confusion and lethargy. Tom 's blood pressure was slightly elevated. His basic blood work showed the following: Serum sodium: 121 mEq/L, decreased Blood urea nitrogen: 9 mg/dl, decreased Serum chloride: 85 mEq/L, decreased Serum uric acid: 2.2 mg/dl, decreased The rest of his electrolytes and chemistry panel blood tests were normal, in addition to his thyroid and cortisol tests all being in normal range. Tom 's physician then ordered a serum and a urine osmolarity and a urine sodium level. He was started on a water restriction regimen and was given a saline IV and saline PEG tube flushes were begun. The serum osmolarity was low, while the urine osmolarity was elevated and the urine sodium was elevated. 1. What condition has hypotonic plasma, with lower serum osmolarity and higher urine osmolarity and an elevated urine sodium level with a lower plasma sodium level? 2. What other disorder is associated with ADH? 3. What conditions does the patient have that are associated with SIADH? 4. How does ADH affect the body?

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