Please enable JavaScript.
Coggle requires JavaScript to display documents.
Fluid Balance 2 - Coggle Diagram
Fluid Balance 2
Filtration
movement of water & solutes
from area of high hydrostatic pressure
to low hydrostatic pressure that
is created by 'weight' of fluid
eg. Kidney
filtering blood - levels of high hydrostat pressure pushing water & solutes from the blood through and then to be filtered.
Hydrostatic pressure
The force within the fluid compartment that pushes water out of the vascular system (ie. capillaries)
-
-
Fluid shifts
Plasma to interstitial fluid shifts results in OEDEMA
(atypical accumulation of fluid in interstitial space
leading to tissue (but not cell) swelling)
Oedema causes by any event that
- increases flow of fluid out the blood or
- hinders its return
-
-
-
-
Fluid spacing
-
Third spacing
Fluid accumulation in part of body where it is not easily exchanged with ECF; fluid trapped and unavailable for functional use (ascites)
-
Osmosis
-
Key terms
Oncotic pressure
Pressure exerted by colloids (non-diffusable molecules)
eg. proteins such as albumin
unable to cross capillary walls so draw water towards them
& encourage osmosis (to make solute dilute)
Osmotic pressure
Amount of pressure required
to stop osmotic flow of water
through a membrane
(Determined by conc of solutes
in solution)
when pressure is applied to high conc,
the solvent (water is unable to move across
the membrane)
Osmotic diuresis
Increased urine output
caused by subs such as
glucose, mannitol or contrast medium
-
-
-
Active transport
movement of dissolved molecules
into or out of the cell through the cell
membrane from low to high conc
-
Relies on availability of carriers
& utilises energy (ATP) to transport
solutes in & out of the cell
eg. sodium, potassium pump
-