![]() Commonly the classical clinical features of hypovolemia are absence in the early phase of hemorrhagic shock. Hypovolemia results in a reduction of systemic venous return, causing reduction in the stroke volume, which is responsible for the decrease in cardiac output. The mortality and morbidity are mainly attributed to hypovolemic shock. ![]() Trauma is the leading cause of mortality and morbidity in the reproductive age group. The IVC:Aorta diameter index can be used as a parameter for detecting early phase (Class 1) of hypovolemic shock. With mathematical analysis, we suggested the number of IVC:Aorta index as 1.14☒SD with SD 0.18 as a cut off value for class 1 hypovolemic shock. There were differences in IVC, abdominal aorta and inferior vena cava:aorta diameters index pre and post donation. Once the volunteers donated their blood of approximately 450 mls the measurements were repeated using the same methods. ![]() Demographic data and vital signs were taken before the ultrasound measurement done for inferior vena cava and abdominal aorta diameter. Inclusion criteria were same with the blood bank criteria to donate blood. Fifty-two healthy blood donors were included in the study. Researcher was trained by a senior radiologist to assess inferior vena cava and abdominal aorta diameter. This was a prospective study done in the blood bank of a university hospital. The result of the study would be further explorated to determine the inferior vena cava (IVC) abdominal aorta (Aorta) diameter index (IVC:Aorta). The aim of this study was to determine the changes in the diameter of inferior vena cava and abdominal aorta in blood donors by using ultrasound, pre and post blood donation. We explore the potential use of inferior vena cava (IVC) and abdominal aorta (AA) diameter index (IVC:AA) measured ultrasonographically to detect class 1 hypovolemic shock with blood loss less than 15%.ᅟ Methods We designed this study to expand the usage of ultrasound to detect early occurrence of hypovolemia.
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