[Solved]: Mr

Mr. Davidson, aged 58 years, lives alone. He is lethargic with hyperreflexic deep tendon reflexes. He had been in his usual state of good health until this week and has no significant health history other than mild hypertension, which is being treated with diet and exercise. He takes no medications, other than a daily multivitamin. He has been vomiting persistently for 3 days with watery diarrhea, and a relative brought him to the emergency room. On admission, he weighed 153 pounds. His original weight was 165 pounds (75 kg). The nurse assessed his fluid state and noted that his mucous membranes and skin were dry. His temperature was 37.5C, pulse 112, respirations 32, blood pressure 110/88, and urine output in 8 hours 125 mL with a specific gravity of 1.050. Electrolyte findings were serum K+ 3.5 mEq/L (3.5-5.0); Na+ 159 mEq/L (135-145); and Cl- 120 mEq/ L (96-106). His hematocrit and BUN were elevated. Serum glucose was 4.00 mmol/l. 1: Based on Mr. Davidson’s history would you suspect SIADH, diabetes insipidus or dehydration and why? (2 points) 2: What are key differences between SIADH and dehydration? (2 points) What are key differences between Diabetes Insipidus and dehydration? (2 points) What are key differences between SIADH and DI? (2 points)