Abstract
ABSTRACT The objective of this study was to calculate the collapsibility index (CI) in a group of 15 healthy adult mixed breed cats via right hepatic intercostal ultrasound view. The minimal and the maximal diameters of the caudal vena cava (CVC) were obtained during inspiration and expiration, respectively, then CI was calculated. The mean diameter of the CVC was 0.5cm. The mean CI was 28±3% and CI was not significantly associated with gender. As in human medicine, there is a growing need for less invasive monitoring in small animal practice. The CI enables the assessment of estimated volemia without the need for a central venous catheter. This is the first reported study investigating CI in cats.
Highlights
In veterinary medicine, central venous pressure (CVP) measurement is widely used in critically ill animals, more intensely in cases of hypovolemic or septic shock and in cases with renal or cardiac involvement
Because all the cats were healthy, we considered that CVP and systolic pressures were within the normal range (0 to 5cmH2O)
The caudal vena cava (CVC) diameter was measured in mm (Figure 2)
Summary
Central venous pressure (CVP) measurement is widely used in critically ill animals, more intensely in cases of hypovolemic or septic shock and in cases with renal or cardiac involvement. With anesthetized dogs, the CVC diameter, measured by ultrasonography, has been used as a predictor of CVP (Nelson et al, 2010; Meneghini et al, 2016). Other studies have used the CVC diameter and/or the CVC diameter:aorta diameter ratio to assess blood volume in dogs (Cambournac et al, 2018; kwak et al, 2018). A study with healthy and spontaneously breathing dogs, reported that the right intercostal hepatic ultrasonographic view and a longitudinal right paralumbar ultrasonographic view can be used to obtain a reliable estimation of the CVC diameter. The authors were able to determine ultrasonographic reference intervals for the CVC
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