oedema shock congestion Flashcards
what are the effects of gen venous congestion?
cyanosis
impaired tissue perfusion ( hypoxia –> necrosis/fibrosis)
edema
what are causes of acute localized venous congestions?
thrombosis
ligature
what are causes of chronic localized venous congestions?
tumor
fibrosis
liver cirrhosis
pleural cavity
pleural effusion
pericardial cavity
pericardial effusion
peritoneal cavity
ascites
severe gen edema
anasarca
pathogenesis of edema
increased capillary pressure and permeability
decreased oncotic pressure ( decrease plasma proteins)
lymphatic obstruction
where does cardiac edema first appear?
ankles and feet
where does renal edema first appear?
eyelids ( periorybital ) and face
where does cardiac edema first appear?
ascites
loss of 15% 750 ml
compensatory mechanisms maintain CO
loss of 15-30% 750-1500 ml
hypoxemia and decreased BP – reversible
loss of 30-40% 1500-2000ml
impaired compensation
profound shock and severe acidosis
loss of 40-50%
irreversible stage
cardiogenic shock
most common cause LVMI
occurs when >40% of ventricular mass is damaged
whats the most common type of shock?
septic
whats the rarest type of shock?
neurogenic
