Intracardiac echocardiography guided transeptal catheter injection of microspheres for assessment of cerebral microcirculation in experimental models

Bellapart, J., Dunster, K.R., Diab, S., Platts, D.G., Raffel, C., Gabrielian, L., Maybauer, M.O., Barnett, A., Boots, R.J. and Fraser, J.F. (2013) Intracardiac echocardiography guided transeptal catheter injection of microspheres for assessment of cerebral microcirculation in experimental models. Cardiology Research and Practice, 1 1: 1-8. doi:10.1155/2013/595838

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads

Author Bellapart, J.
Dunster, K.R.
Diab, S.
Platts, D.G.
Raffel, C.
Gabrielian, L.
Maybauer, M.O.
Barnett, A.
Boots, R.J.
Fraser, J.F.
Title Intracardiac echocardiography guided transeptal catheter injection of microspheres for assessment of cerebral microcirculation in experimental models
Journal name Cardiology Research and Practice   Check publisher's open access policy
ISSN 2090-0597
2090-8016
Publication date 2013
Sub-type Article (original research)
DOI 10.1155/2013/595838
Open Access Status DOI
Volume 1
Issue 1
Start page 1
End page 8
Total pages 8
Place of publication New York, NY, U.S.A.
Publisher Hindawi Publishing Corporation
Collection year 2014
Language eng
Subject 2705 Cardiology and Cardiovascular Medicine
Abstract The use of microspheres for the determination of regional microvascular blood flow (RMBF) has previously used different approaches. This study presents for the first time the intracardiac injection of microspheres using transeptal puncture under intracardiac echocardiography guidance. Five Merino sheep were instrumented and cardiovascularly supported according to local guidelines. Two catheter sheaths into the internal jugular vein facilitated the introduction of an intracardiac probe and transeptal catheter, respectively. Five million colour coded microspheres were injected into the left atrium via this catheter. After euthanasia the brain was used as proof of principle and the endpoint for determination of microcirculation at different time points. Homogeneous allocation of microspheres to different regions of the brain was found over time. Alternate slices from both hemispheres showed the following flow ranges: for slice 02; 0.57-1.02 mL/min/g, slice 04; 0.45-1.42 mL/min/g, slice 06; 0.35-1.87 mL/min/g, slice 08; 0.46-1.77 mL/min/g, slice 10; 0.34-1.28 mL/min/g. A mixed effect regression model demonstrated that the confidence interval did include zero suggesting that the apparent variability intra- and intersubject was not statistically significant, supporting the stability and reproducibility of the injection technique. This study demonstrates the feasibility of the transeptal injection of microspheres, showing a homogeneous distribution of blood flow through the brain unchanged over time and has established a new interventional model for the measurement of RMBF in ovine models.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Medicine Publications
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 2 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 28 Nov 2013, 20:19:25 EST by System User on behalf of School of Medicine