Arteriovenous shunt Artificial device allows an artery to flow to a vein without moving through capillaries. Complications of renal dialysis Hypotension, muscle cramps, nausea and vomiting, haemorrhage from the access site, and infection at the access site. What does insulin do When you eat, insulin is secreted from the pancreas. Insulin opens up the cell for sugar. Hypoglycaemia Lack of sugar in the blood. Can be deadly.