Fluid Assessment and Balance Flashcards Preview

Jason's MD2 Core Conditions > Fluid Assessment and Balance > Flashcards

Flashcards in Fluid Assessment and Balance Deck (22)
1

what is mainly in the extracellular compartment?

sodium
chloride

2

what is mainly in the intracellular compartment?

potassium
organic anions

3

high sodium content means what for the ECV?

higher volume in ECV

4

how to calculate the osmolality concentration quickly?

GUN2
Glucose, urea, Nax2

5

normal ECV?

33%

6

normal ICV?

66%

7

ECV vary with water intake?

Not really, mostly osmolar content

8

ICV varies with water intake?

yes

9

total body water is circa___%?

60%

10

how to adjust ECV?

modify Na and water

11

how to adjust ICV?

modify water only intake

12

2 causes of high plasma osmolality:

1. not enough water in
2. not enough Na+ out

13

low plasma osmolality/sodium can lead to what 2 presentations?

altered sensorium
seizures

14

how do you get low plasma osmolality/sodium?

increased water intake

15

3 causes of increased water intake in body/drugs

increased ADH
renal impairment
diuretics

16

ECV correlates with blood volume unless?

-hypoalbunemia
-leaky capillaries

17

what's normal K+ levels?

3.5-5.0mmol/l

18

abnormal K+ can reflect?

shift between ICV/ECV or deficientcy/excess

19

what 4 things shifts K+ into cells?

insulin,
B-agonists,
aldosterone,
alkalosis

20

plasma sodium does not tell you:

body sodium content

21

since intracellular osmols are relatively constant, what reflects intracellular volume?

plasma osmolility

22

what is K+ like in diabetic ketoacidosis?

low K+