الفهرس 
Accuracy of preoperative evaluation of inferior vena cava collapsibility index and caval aorta index for prediction of hypotension after induction of general anaesthesia : A prospective observational study
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Abstract
Hypotension is a common side effect during induction of general anesthesia, and if severe, it results in many complications.
Patients’ susceptibility to intra-operative hypotension can be affected by many pre-operative factors, as the pre-operative volume status that may differ according to comorbidities, physical status, pre-operative medications and pre-operative fasting hours.
Various parameters have lately been investigated to determine the intravascular volume status prior to surgery.
Ultrasonography of inferior vena cava (IVC) is a reliable noninvasive tool that can be used as an indicator of intravascular volume status.
The current study aimed to compare the efficacy of both pre-operative inferior vena cava collapsibility index (IVCCI) and inferior vena cava to aorta diameter (IVC:Ao ratio index) for prediction of post general anaesthesia induction hypotension (PGAH).
After obtaining written informed consent from all patients, 102 patients of both sexes, American Society of Anesthesiologists’ physical status 1 or 2 scheduled for elective surgery under general anaesthesia were included in this study.
We concluded that Pre-operative IVCCI and IVC:Ao index are good predictors of the occurrence of PGAH. However, IVC:Ao index is a more powerful predictor than IVCCI.