Lipid peroxidation in haemorrhagic shock and after transfusion of blood in dogs.

The present study was carried out on mongrel dogs. Haemorrhagic shock of different severities and duration was produced by exsanguination from an artery. After the required duration of shock, two third of the volume of blood withdrawn was transfused back into the animal. Effect of haemorrhage and reperfusion of blood after haemorrhagic shock on lipid peroxidation was assessed by measuring plasma malondialdehyde (MDA). Severity of shock was assessed from the haematocrit values. There was a significant increase (P < 0.05) in plasma MDA level after blood transfusion in a group having 40 mm Hg blood pressure as magnitude of shock and one hour as duration of shock (Group II) only. Haemotocrit value was also significantly low (P < 0.05) in this group after haemorrhagic shock. Results are suggestive of lipid peroxidation with ischaemic reperfusion in severe and long duration of shock.