Hypersensitivity. All conditions in which hypervolaemia & its consequences (eg, increased stroke vol, elevated BP) or haemodilution could represent a risk for the patient eg, decompensated cardiac insufficiency, oesophageal varices, pulmonary oedema, haemorrhagic diathesis, severe anaemia, renal & post-renal anuria, dehydration (unless sufficient fluid is infused simultaneously).