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Abstract: TH-PO400

Correlation Between Conventional Ultrasound and Microchip Technology Ultrasound in Evaluating Pulmonary and Inferior Vena Cava in AKI Patients Undergoing Renal Replacement Therapy

Session Information

Category: Fluid, Electrolytes, and Acid-Base Disorders

  • 1102 Fluid, Electrolyte, and Acid-Base Disorders: Clinical


  • Mendes, Renata De souza, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
  • Suassuna, Jose H. R., Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
  • Soares, Debora Miguel, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil

Point of care ultrasonography is an essential tool in nephrologists physical examination. Ultraportable ultrasound with microchip technology-Butterfly IQ is a recent technological advance and should be compared with the traditional piezoelectric. So the study aims to compare both technologies, in the analysis of two extravascular volume parameters: B-lines and Inferior venous collapsibility index (IVCi) in patients with acute kidney injury (AKI) in the ICU receiving renal replacement therapy (RRT).


We conducted a study on fifty sedated, mechanically ventilated patients with AKI requiring RRT in two hospitals. Exclusions included individuals under 18 years, pregnant women, cancer patients with no further treatment options, and patients receiving high-dose norepinephrine or any dose of vasopressin. We evaluated B lines and IVCi using both technologies at two-time points. Correlation tests were performed.


A total of 200 exams were done with a mean age of 73.5±13, including 20 male patients (39%). Conventional HD was performed in 27.5% of cases, with a mean prescribed ultrafiltration of 1.6 ± 0.8 L. The correlation between the piezoelectric and microchip technologies for evaluating pulmonary B-lines was strongly positive, with correlation coefficients 0.96 and 0.93 at the beginning and 1st hour, respectively (P=0.001). Similarly, the correlation coefficients of tIVCi were 0.70 and 0.87 at the beginning and 1st hour, respectively (P=0.001), indicating a moderate correlation.


On AKI patients under RRT USG by Butterfly IQ microchip has an excellent correlation with traditional piezoeletric technology and combines advantages related to portability, easy handling and low cost with reliability in obtaining parameters for volume assessment obtained at the bedside.