We need somebody to replace the principal inestigator.

The main objective of this study was to evaluate the effect of intermittent pneumatic venous compression on intra-operative fluid intake by comparing two groups of patients with or without intermittent pneumatic compression of the lower limbs.

Inclusion Criteria:

• The patient must have given his/her informed and signed consent
• The patient must be insured or beneficiary of a health insurance plan
• Patient with ASA score 1-3
• Body mass index < 30 kg/m^2
• Patient is schelduled for major abdominal surgery (laparotomy without risk of haemorrhage whose duration is assumed to be greater than 120 min)
• The patient passes from home, directly to the hospital, without schelduled hospitalization in another department

Exclusion Criteria:

• The patient is participating in another study
• The patient is in an exclusion period determined by a previous study
• The patient is under judicial protection, under tutorship or curatorship
• The patient refuses to sign the consent
• It is impossible to correctly inform the patient
• The patient is pregnant
• The patient is breastfeeding
• The patient has a contra-indication for treatment necessary for the study
• ASA score > 3
• body mass index > 30 kg/m^2
• Expected surgical time of < 120 minutes
• Surgery with risk of hemorrhage
• Surgery via celioscopy
• The surgery require perineal access, thus rendering any blinding impossible
• Hepatic surgery
• Contra indication for intermittent venous compression