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Neurological Research and Practice
Published in: Neurological Research and Practice 1/2022

Open Access 01-12-2022 | Magnetic Resonance Imaging | Research article

A mobile battery-powered brain perfusion ultrasound (BPU) device designed for prehospital stroke diagnosis: correlation to perfusion MRI in healthy volunteers

Authors: Mustafa Kilic, Fabien Scalzo, Chandler Lyle, Dobri Baldaranov, Maximilian Dirnbacher, Tristan Honda, David S. Liebeskind, Felix Schlachetzki

Published in: Neurological Research and Practice | Issue 1/2022

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Abstract

Background

Early prehospital stroke identification is crucial for goal directed hospital admission especially in rural areas. However, clinical prehospital stroke scales are designed to identify any stroke but cannot sufficiently differentiate hemorrhagic from ischemic stroke, including large vessel occlusion (LVO) amenable to mechanical thrombectomy. We report on a novel small, portable and battery driven point-of-care ultrasound system (SONAS®) specifically developed for mobile non-invasive brain perfusion ultrasound (BPU) measurement after bolus injection of an echo-enhancing agent suitable for the use in prehospital stroke diagnosis filling a current, unmet and critical need for LVO identification.

Methods

In a phase I study of healthy volunteers we performed comparative perfusion-weighted magnetic resonance imaging (PWI) and BPU measurements, including safety analysis.

Results

Twelve volunteers (n = 7 females, n = 5 males, age ranging between 19 and 55 years) tolerated the measurement extremely well including analysis of blood–brain barrier integrity, and the correlation coefficient between the generated time kinetic curves after contrast agent bolus between PWI and BPU transducers ranged between 0.89 and 0.76.

Conclusions

Mobile BPU using the SONAS® device is feasible and safe with results comparable to PWI. When applied in conjunction with prehospital stroke scales this may lead to a more accurate stroke diagnosis and patients bypassing regular stroke units to comprehensive stroke centers. Further studies are needed in acute stroke patients and in the prehospital phase including assessment of immediate and long-term morbidity and mortality in stroke.
Trial registration: Clinical trials.gov, registered 28.Sep.2017, Identifier: NCT03296852.
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Metadata
Title
A mobile battery-powered brain perfusion ultrasound (BPU) device designed for prehospital stroke diagnosis: correlation to perfusion MRI in healthy volunteers
Authors
Mustafa Kilic
Fabien Scalzo
Chandler Lyle
Dobri Baldaranov
Maximilian Dirnbacher
Tristan Honda
David S. Liebeskind
Felix Schlachetzki
Publication date
01-12-2022
Publisher
BioMed Central
Published in
Neurological Research and Practice / Issue 1/2022
Electronic ISSN: 2524-3489
DOI
https://doi.org/10.1186/s42466-022-00179-8

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