The ALVO retractor system is intended to provide optimal use of the surgical incision in order to ensure good access within the operative field. It is suitable for major surgery related to medical conditions of lower oesophagus, diaphragm, stomach, duodenum, small intestine, large intestine, liver, bile ducts, pancreas, spleen and urinary system as well as for retroperitoneal procedures. It can also be used in trauma surgery via the transabdominal approach and gynaecological procedures where the longitudinal incision is used.