• We expect a 30% reduction in the number of per- and post-operative complications observed during hospitalisation in acute care beds in the "optimised" subgroup with respect to "conventional" subgroup. Complications include: death, per-operative [ Time Frame: during hospitalisation in acute care ] [ Designated as safety issue: Yes ]
  

• We will check if patients in the "optimised" group have:1) a reduction in the delay to walk without help2) more days " out-of-hospital " at 3 months 3) a reduction in 1-year mortality rate [ Time Frame: at 3 months and at one year ] [ Designated as safety issue: Yes ]
  

Rationale : Hip fracture patients frequently develop postoperative complications that increase their hospital length of stay and the cost of care.

These complications are also associated with increased mortality. Perioperative tissue hypoperfusion may participate in the development of postoperative complications. Hypovolemia is secondary to many factors in hip fracture patients (including blood loss, fasting and dehydration) and can result in low cardiac output and tissue hypoperfusion. Two single-center, randomized, double-blind studies have demonstrated that peroperative fluid titration guided by esophageal Doppler measurements of stroke volume could improve patient outcome. Interpretation of these results was that such a stroke volume "optimisation" strategy could help the anesthesiologist give more fluids to his patient and reduce the risk of hypoperfusion without the risk of congestion, thereby reducing postoperative complications and improving patient outcome. We want to test the same hypothesis in a multicenter trial to confirm with a high level of proof the usefulness of this strategy. If previous results are confirmed, this could lead to a change in current anesthetic management of hip fracture patients and potentially have a very important economical impact on health costs.Goals : Primary endpoint is to demonstrate that colloid (Voluven®) titration, guided using esophageal Doppler estimation of stroke volume, during the surgical repair of hip fracture reduces the incidence of postoperative complications (composite criteria). Secondary endpoints in the "optimised group" include :

1) reduced delay to walk without help ; 2) increased number of days " out-of-hospital " at 3 months after the fracture ; and 3) reduced 1-year mortality.