Extracorporeal Arteriovenous Ultrasound Measurement of Cardiac Output in Small Children

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

WHAT WE ALREADY KNOW ABOUT THIS TOPIC: WHAT THIS ARTICLE TELLS US THAT IS NEW: BACKGROUND:: Technology for cardiac output (CO) and blood volume measurements has been developed based on blood dilution with a small bolus of physiologic body temperature saline, which, after transcardiopulmonary mixing, is detected with ultrasound sensors attached to an extracorporeal arteriovenous loop using existing central venous and peripheral arterial catheters. This study aims to compare the precision and agreement of this technology to measure cardiac output with a reference method, a perivascular flow probe placed around the aorta, in young children. The null hypothesis is that the methods are equivalent in precision, and there is no bias in the cardiac output measurements.

METHODS: Forty-three children scheduled for cardiac surgery were included in this prospective single-center comparison study. After corrective cardiac surgery, five consecutive repeated cardiac output measurements were performed simultaneously by both methods.

RESULTS: A total of 215 cardiac output measurements were compared in 43 children. The mean age of the children was 354 days (range, 30 to 1,303 days), and the mean weight was 7.1 kg (range, 2.7 to 13.6 kg). The precision assessed as two times the coefficient of error was 3.6% for the ultrasound method and 5.0% for the flow probe. Bias (mean COultrasound 1.28 l/min - mean COflow probe 1.20 l/min) was 0.08 l/min, limits of agreement was ±0.32 l/min, and the percentage error was 26.6%.

CONCLUSIONS: The technology to measure cardiac output with ultrasound detection of blood dilution after a bolus injection of saline yields comparable precision as cardiac output measurements by a periaortic flow probe. The difference in accuracy in the measured cardiac output between the methods can be explained by the coronary blood flow, which is excluded in the cardiac output measurements by the periaortic flow probe.

Detaljer

Författare
Externa organisationer
  • Skåne University Hospital
  • National University Hospital of Iceland
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Pediatrik
  • Anestesi och intensivvård
Originalspråkengelska
Sidor (från-till)712-718
TidskriftAnesthesiology
Volym130
Utgåva nummer5
StatusPublished - 2019 maj
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa

Relaterad forskningsoutput

Theódór Sigurdsson, 2020, Lund: Lund University, Faculty of Medicine. 71 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

Visa alla (1)