<prompt> Primary causes of non-inflammatory edema include all of the following except: September 2009Increased intravascular pressureDecreased vascular permeabilityObstruction of lymphaticsReduced plasma colloid oncotic pressure  <response>: Ans. B: Decreased vascular permeability Edema is caused by: Decreased plasma osmotic pressure Increased hydrostatic pressure Increased permeability of vascular endothelium Lymphatic obstruction 