Starling forces

Last revised by Daniel J Bell on 10 Aug 2020

Starling forces describe the movement of fluids between the vasculature and interstitial spaces. Fluid movement is determined by the balance of hydrostatic and osmotic pressure gradients 1.

Starling forces

Net pressure = [ (Pc - Pi) - (pc - pi) ]


  • Pc = hydrostatic pressure of the capillary
  • Pi = hydrostatic pressure of the interstitium
  • pc = osmotic pressure of the capillary
  • pi = oncotic pressure of the interstitium

The balance between these forces determines the net pressure which dictates the direction of fluid movement 1.

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.