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Flashcards in Salt and water balance Deck (25):
1

does water follow sodium or does sodium follow water?

WATER follows SODIUM everywhere

2

what type of activity controls sodium levels?

mineralocorticoid activity

3

what is the main steroid involved in mineralacocorticoid activity?

aldosterone

4

too much mineralocorticoid activity=?

sodium retention

5

too little mineralocorticoid activity=?

sodium loss

6

if there is sodium loss there is also what?

water loss

7

what hormone controls water balance

ADH

8

how does ADH work?

acts on renal tubules to cause water reabsorption

9

which part of pituitary does ADH come from?

posterior

10

increased ADH does what to urine?

makes it more concentrated because less water in urine

11

decreased ADH does what to urine?

make it more dilute because more water in urine

12

what 2 things can cause decreased sodium concentration?

too much water

too little sodium

13

what 2 things can cause increase in sodium concentration?

too little water
too much sodium

14

malaise
tiredness
weight loss
decreased appetite
looks TANNED
craves salty food
low BP which falls more upon standing

ADDISONS!!!

15

what are the 2 stimuli for ADH release?

osmotic - in health
non osmotic- in disease- pain, vomiting, hyoptension

16

what us SIAD syndrome

syndrome of inappropriate antidiuresis

17

what is the basic problem causing too little water in diabetes insipidus?

disruption of pituitary /pit stalk so ADH cant be secreted so no water reabsorption and lots of water lost in urine

18

what are the 3 volume statuses?

hypovolaemic
euvolaemic
hypervolaemic

19

hypovolaemia in hyponatraemia

too little sodium

20

how is hypervolaemia often seen?

oedema

21

if you suspect adrenal failure what should you measure?

cortisol and ACTH

22

if too little sodium what do you do?

give sodium

23

of too much water what do you do?

fluid restriction

24

if too little water what do you do?

get rid of excess

25

of too much sodium what do you do?

get rid of excess . use diuretics the replace water