03 - posterior pituitary dysfuction

Question 1

(DI: rare in horses)

(path)

1. decreased release of what from the posterior pituitary?

Answer 1

1. ADH

(secondary to posterior pituitary destruction)

Question 2

(DI: rare in horses)

1. Cx?

Answer 2

1. PU/PD

Question 3

(DI: rare in horses)

1. 3 ddx?

Answer 3

1. renal dz
2. psychogenic salt-water eater-drinker syndrome
3. PID: equine cushing disease

Question 4

(DI: rare in horses)

(dx)

1. USG less than wat?

Answer 4

1. 1.010

Question 5

(DI: rare in horses)

(dx)

1. water deprivation testing - consists of doing what?

Answer 5

1. taking away water and seeing if they concentrate urine

if psychogenic will concentrate urine

if no concentration give AHD -> if concentrates then they have central DI

Question 6

(DI: rare in horses)

1. tx for central DI?

Answer 6

1. exogenous ADH