Caudal vena cava collapsibility index in healthy cats by ultrasonography

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.

摘要 本研究旨在通过右侧肋间肝脏超声切面，计算15只健康成年混血家猫的塌陷指数（collapsibility index, CI）。研究分别于吸气相与呼气相采集后腔静脉（caudal vena cava, CVC）的最小与最大直径，随后计算塌陷指数。后腔静脉的平均直径为0.5cm，平均塌陷指数为28±3%，且塌陷指数与性别无显著关联。与人类医学领域相仿，小动物临床诊疗中对微创监测的需求日益增长。塌陷指数无需借助中心静脉导管即可评估估算血容量。本研究为首例针对家猫塌陷指数的相关研究报道。