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inferior vena cava collapsibility index
IVC collapsibility index = [maximum diameter on expiration - (minimum diameter on inspiration/maximum diameter on expiration)]
Indication:
- assessment of volume status & to predict fluid responsiveness in patients with sepsis [2,3]
Procedure:
- the caliper of the inferior vena cava (IVC) is assessed through the respiratory cycle by ultrasound
Clinical significance:
- a > 50% decrease in diameter of the IVC with inspiration with IVC/aorta diameter ratio of <0.8 indicates hypovolemia
- a dilated IVC that does not change in caliper during respiration indicates hypervolemia vs euvolemia
- % decrease in inferior vena cava (IVC) diameter with inspiration of > 50% & an IVC/aorta ratio of 0.8 may not correlate with a low intravascular volume in children [1] (previous studies had found that it did)
General
assessment of volume responsiveness
ultrasound (US, UTZ)
References
- Ng L et al.
Does bedside sonographic measurement of the inferior vena cava
diameter correlate with central venous pressure in the
assessment of intravascular volume in children?
Pediatr Emerg Care 2013 Mar; 29:337.
PMID: 23426248
- Nagi AI et al
Inferior vena cava collapsibility index as a predictor of fluid responsiveness
in sepsis-related acute circulatory failure.
Ain-Shams J Anesthesiol, 2021. 13, 75
Not indexed in PubMed
https://asja.springeropen.com/articles/10.1186/s42077-021-00194-y
- Preau S, Bortolotti P, Colling D et al
Diagnostic Accuracy of the Inferior Vena Cava Collapsibility to Predict Fluid
Responsiveness in Spontaneously Breathing Patients With Sepsis and Acute
Circulatory Failure.
Crit Care Med. 2017 Mar;45(3):e290-e297. doi: 10.1097/CCM.0000000000002090.
PMID: 27749318