Hypovolaemic shock with oedema due to increased capillary permeability.

A case of severe hypovolaemic shock related to idiopathic oedema was observed in a 37 year old woman. Large plasma volume expansion (nearly 12 1 over 9 hours) did not change the clinical status. Haemodynamic studies showed low cardiac index (1.1 1/min/m2), decreased left ventricular stroke work index (6.7 gm/m2), and high systemic arterial resistance (52 mmHg/1/min/m2). Dopamine infusion improved the haemodynamic condition which returned to normal 30 hours after the beginning of shock. After recovery, capillary permeability measured by a modification of Landis' method was markedly increased. A study of albumin metabolism showed a normal intravascular pool and a rapid exchange compartment with a twofold increase in slow exchange compartment. Hormonal levels and complement fractions were within normal limits. Serum protein immuno-electrophoresis showed an abnormal IgG. These results clearly demonstrate that hypovolaemia is related to increased capillary permeability and leakage of albumin out of the vascular space. When large infusions fail, inotropic agents, especially Dopamine, should be used in such cases.