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Flashcards in Electrolytes: Fluids Deck (25)
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1

Who are most vulnerable to water changes?

:Very young
:Very old- lose muscle, less body mass, decrease thirst, decrease kidney function

2

3 Main body fluid compartments

Intracellular
Extracellular
Transcellular

3

Intracellular

:contain within the cell
:2/3 of all body water

4

Extracellular

:Interstitial- Between the cell
:Intravascular- Blood vessels

5

Transcellular

Compartments that don't move around the body
ex. Fluids in pericardium sac
cerebral spinal fluid

6

"Corridor Effect"

it needs to pass the interstitial space to get to one to another

7

Hydrostatic Pressure

:force exerted on vessel walls by fluids flowing through them.
:tends to force fluids and electrolytes out of capillaries into the interstitial space
:created by the pumping of the heart

8

Plasma Protiens

Albumin
Glucose
Urea
"Big Dogs"
Bigger molecules that pulls back water in capallaries

9

Active transport

:Energy spent
:moves large molecules across a pressure gradient from an area of decrease concentration.

10

Two types of Active Transports

Sodium Pump: Intercellular
Potassium Pump: Intervascular

11

Avg. Fluid input/output

2500ml

12

Insensible Losses

Fluid output we cannot measure: feces, sweat, lungs, skin

13

Sensible Losses

Kidney (urine)
GI System

14

Hypothalmus

:Thirst Center
:Produces ADH
:Regulator of H2O intake

15

Posterior Pituitary

:Stores and Secretes ADH

16

Kidneys: Adrenals

Saves NA (increase NA absorption)

17

ADH

:Antidiuretic Hormone (vasopressin)
:Stimulates kidneys to reabsorb H2O back into plasma
:Decrease urine output

18

What inhibits ADH?

:normal osmolarity
:Too much fluids

19

ADH production disorders

:Diabetes Insipidus
:SIADH (Syndrome Inappropriate Antidiuretic Hormone Secretion)

20

Diabetes Insipidus

:Decrease ADH
:concentrated electrolytes
S&S: Polyuria (excess urination), Polydepsia (excess thirst)
:based on fluid excretion not glucose

21

Types of diabetes insipidus

Central D.I.
Nephrogenic D.I.

22

Central DI

Problems in Hypothalmus/Pituitary
(brain injury, brain tumor)

23

Nephrogenic DI

Kidneys lost sensitivity to ADH

24

SIADH

:Increase ADH
:Diluted electrolytes
:Retaining urine
:very little, concentrated urine

25

RAAS

Renin-Angiotensin-Aldosterone System
Stimulated by fluids deficiency