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We have analysed 283 patient studies operated of ambulatory during the last two years. These patients represent only 12% of the patient group. It's especially a matter of patients operated urgently. The local anaesthesia in the regional local was practised in terms of 90% of cases. The complications where exceptional. We wanted to insist on the necessary guidelines and pitfalls to forget during the practice of that surgery and we wanted to focus on its advantages.

The aim of our work was to study the different blood parameters as well as the activity of the vasopressinergic axis in young and mature male rats under normal conditions and following a 3-day dehydration cycle by water deprivation. Under normal conditions, our study demonstrates higher levels of vasopressin in mature rats as compared to young rats. This could be due in part to the higher blood osmolality in the mature rats. After dehydration, hypovolemia, plasmatic hyperosmolality, hypernatremia and hyperproteinemia cause a stimulation in vasopressin synthesis and release, as seen in results obtained from the hypothalamus, hypophysis and plasma in both young and mature rats. However, the response of the vasopressinergic axis to dehydration is greater in young rats, suggesting a more pronounced sensitivity to osmotic factors.

The aim of Our work has consisted of studying the effects of a severe three-day fast on the evolution of the body weight, on glycemia and on proteinemia among the young and mature male rats. The decrease in body weight which is more marked among young rats after starvation shows that the loss of body mass due to fasting decreases with the age of the rats. The physiological perturbations of nutritive constants that have been recorded during this period of fast show that the mature rat first attacks its non-protein stocks or glucides, which leads to a decrease in its glycemia and in its lipids; whereas the young rat uses its proteins after only three days of starvation because of its small stock of lipids.