Contrast-enhanced subharmonic aided pressure estimation for assessment of intracranial pressure in vivo.
Pediatr Radiol
; 53(8): 1640-1647, 2023 07.
Article
em En
| MEDLINE
| ID: mdl-37062765
ABSTRACT
BACKGROUND:
Intracranial pressure (ICP) monitoring in children currently requires invasive techniques. Subharmonic aided pressure estimation (SHAPE) uses contrast-enhanced ultrasound (CEUS) to measure intravascular and interstitial pressure, but utility in ICP measurements has yet to be explored.OBJECTIVE:
The objective of this study was to investigate SHAPE as a novel tool for noninvasive ICP measurements in fetal lambs. MATERIALS ANDMETHODS:
Eighteen fetal lambs at 107-139 days gestational age (term = 145 days) underwent subdural ICP catheter placement. The brain was imaged in the coronal plane in CEUS mode optimized for SHAPE, while infusing an US contrast agent into the fetal circulation. After SHAPE calibration, saline was infused via the subdural catheter to increase ICP. Five-second SHAPE cine clips were obtained at various ICPs. Subharmonic intensity values of the whole brain and thalami were correlated with ICP values using mixed effects linear regression analyses and the strength of the relationship was evaluated by Spearman's rank-order correlation.RESULTS:
Forty-nine experiments produced 723 datapoints, including SHAPE intensity values and mean ICP measurements. There was a statistically significant inverse relationship between SHAPE intensity values and ICP measurements in the whole brain and thalami (median rho value - 0.58 and - 0.56, respectively).CONCLUSION:
SHAPE intensity values of the brain demonstrate an inverse and statistically significant correlation with in vivo ICP measurements in an animal model.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pressão Intracraniana
/
Meios de Contraste
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Pediatr Radiol
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Estados Unidos