الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The ability to assess intravascular volume is an essential tool for perioperative hemodynamic management. In the past, they were relied on traditinal methods for assessment of volume status including physical examination, raised leg test, central venous pressure (CVP). These methods have many disadvantages. So, many studies recommended inferior vena cava collapsibility index (IVC-CI) as an accurate reliable method for evaluation of volume status. Sometimes, visualization of inferior vena cava (IVC) is difficult for many causes as obesity. So, many studies tried to find a reliable adjunction to inferior vena cava such as subclavian vein (SCV).This study aimed proving that SCV-CI is alternative to IVC-CI for evaluation of volume status. So, 64 patients who underwent abdominal surgery with midline laparotomy were evaluated pre-operatively, intraoperatively and post-operatively by measuring inferior vena cava collapsibility index (IVC-CI) and subclavian vein collapsibility index simultaneously using an US (SIMENS ACUSON P300). In addition to, basal monitoring includes heart rate (HR), invasive mean arterial blood pressure (MAP) and central venous pressure (CVP).The data was collected at certain events: before induction of anaesthesia, after infusion of 500 ml ringer solution at rate 50 ml/hr, at attacks of hypotension and 30 minutes after the end of operatoion. Our results proved that SCV-CI is a reliable accurate alternative to C-IVC-CI. We found that measurement of SCV collapsibility index is a reliable alternative to IVC collapsibility index for evaluation of volume status and fluid resuscitation but still IVC-CI is more sensitive (Sensitivity 100%).