الفهرس 
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Abstract
The study was carried out on geriatric patients subjected to orthopaedic surgery in Mansoura University Emergency Hospital. It included two groups: a retrospective group and a prospective one. The retrospective group patients were considered as the control group. It included 310 patients who represent geriatric patients subjected to orthopaedic surgery at Mansoura University Emergency Hospital during the last three years. Patients<U+2019> data obtained from the file records were collected. The Prospective group included 100 patients representing geriatric surgical orthopaedic patients in the last six months. At the time of admission to the orthopaedic department, they were clinically examined, laboratory investigations were done and received i.v. fluids till the time of the operation. Postoperatively and for three days, they were subjected to fluid regimen in the form of 500 ml of Ringer<U+2019>s lactate every 12 hours and 500 ml of 5% glucose every 12 hours during the first day. During the second day, 500 ml of Ringer<U+2019>s lactate every 12 hours and 500 ml of 5% glucose every 24 hours .In the third day, they received 500 ml of Ringer<U+2019>s lactate every 24 hours and 500 ml of 5% glucose every 24 hours. They were followed clinically by heart rate, arterial blood pressure and amount of urine output every 6 hours and laboratory by serum creatinine and arterial blood gases after 72 hours. Morbidity and mortality among this group were recorded and, together with the data as those of retrospective group patients, compared statistically to the retrospective group. The results of our study showed no statistically significant difference between the two groups as regards hospital stay and morbidity while mortality in prospective group showed zero incidence compared to (5.8%) incidence in retrospective group patients. Prospective group patients postoperative heart rate was, although within normal, significantly decreased when compared to the basal while their mean arterial blood pressure showed no statistically significant change a part from at the sixth and twelfth hours where significant reduction was noticed. Seventytwo hours postoperative serum creatinine in Prospective group patients was significantly reduced compared to the basal value while serum electrolytes showed no statistically significant change. Seventytwo hours postoperative ABG in Prospective group patients showed no statistically significant change in PaCO2, PH and HCO3 levels while PaO2 and SaO2 were significantly increased when compared to the basal value. Conclusion: from our study we concluded that perioperative hydration of geriatric orthopaedic patients reduces mortality among those patients.