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A member asked:

When tumors secrete high levels of vasopressin, what happens to plasma osmolarity, urine osmolarity and urine volume ?

6 doctors weighed in across 2 answers

SIADH: Plasma osmolarity will decrease, urine osmolarity will increase, and urine volume will decrease.

Dr Friedlander and 2 doctors agreed

Answered 5/18/2013

5.2k views

Thank

Tricky concept: ADH / vasopressin makes the body reabsorb water. However, the atrial natriuretic peptide then kicks in and rids the body of that water by forcing excretion of sodium in the urine. Low plasma sodium / lowish osmolarity; urine sodium will be inappropriately high.

Dr Wingo and another doctor agreed

Answered 6/10/2014

5.2k views

Thank

Related Questions

A member asked:

My endo is claiming that I have central diabetes insipidus as my urine osmality increased 100 percent after taking vasopressin inj but my daily fluid intake is 3l and urine output is 3.8l, I have a sudden urge to urinate. Is this really CDI?

2 doctors weighed in across 2 answers

A member asked:

What is the function of ADH (vasopressin) in regulating osmolarity in the blood?

A doctor has provided 1 answer

A member asked:

Is it possible for a pituitary tumor to secrete LH, enough to cause amenorrhea & mild hypergonadism & possibly later on symptoms of PCOS too?

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A member asked:

NF1 patient suspect pheo tumor. Plasma Metaneph .32(<0.50) normetaneph 1.79(<0.90) 24hr urine meta 213(36-190) normeta 478(35-482). Is a tumor likely?

A doctor has provided 1 answer

A member asked:

I was rinsing my mouth with salt water and accidently swallowed it. My urine for the last few hours has been minimal and darker yellow. I read this is due to ADH hormone release making me retain water. Is that true? How long will that last? Thanks?

A doctor has provided 1 answer

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