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Grading portal vein stenosis following partial hepatectomy by high-frequency ultrasonography: an study of rats.
Diagn Interv Radiol
November 2024
West China Hospital of Sichuan University, Department of Ultrasound, Sichuan, China.
Purpose: To evaluate the diagnostic value of ultrasound in grading portal vein stenosis (PVS) in a rat model of 70% partial hepatectomy (PH).
Methods: A total of 96 Sprague-Dawley rats were randomly divided into a PH group and PVS groups with mild, moderate, and severe PVS following PH. Hemodynamic parameters were measured using high-frequency ultrasound (5-12 MHz high-frequency linear transducer), including pre-stenotic, stenotic, and post-stenotic portal vein diameters (PVD, PVD, PVDpost); pre-stenotic and stenotic portal vein velocity (PVVpre, PVVs); hepatic artery peak systolic velocity (PSV); end-diastolic velocity; and resistive index.
Clinical implications of haemodynamics in symptomatic intracranial atherosclerotic stenosis by computational fluid dynamics modelling: a systematic review.
Stroke Vasc Neurol
May 2024
Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
Background: Recently, computational fluid dynamics (CFD) has been used to simulate blood flow of symptomatic intracranial atherosclerotic stenosis (sICAS) and investigate the clinical implications of its haemodynamic features, which were systematically reviewed in this study.
Methods: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses and Meta-analysis of Observational Studies in Epidemiology statements, we searched PubMed and Embase up to March 2024 and screened for articles reporting clinical implications of haemodynamic parameters in sICAS derived from CFD models.
Results: 19 articles met the inclusion criteria, all studies recruiting patients from China.
Cerebral hemodynamics and stroke risks in symptomatic intracranial atherosclerotic stenosis with internal versus cortical borderzone infarcts: A computational fluid dynamics study.
J Cereb Blood Flow Metab
April 2024
Department of Medicine & Therapeutics, the Chinese University of Hong Kong, Hong Kong SAR, China.
There may be different mechanisms underlying internal (IBZ) and cortical (CBZ) borderzone infarcts in intracranial atherosclerotic stenosis. In 84 patients with symptomatic, 50-99% atherosclerotic stenosis of M1 middle cerebral artery (MCA-M1) with acute borderzone infarcts in diffusion-weighted imaging, we classified the infarct patterns as isolated IBZ (n = 37), isolated CBZ (n = 31), and IBZ+CBZ (n = 16) infarcts. CT angiography-based computational fluid dynamics models were constructed to quantify translesional, post-stenotic to pre-stenotic pressure ratio (PR) in the MCA-M1 lesion.
View Article and Find Full Text PDFA new method for assessing transverse sinus stenosis with CT venography based on the venous trans-stenotic pressure gradient.
J Neurointerv Surg
October 2023
Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, Beijing, China
Article Synopsis
- The study focuses on evaluating transverse sinus stenosis (TSS) and its link to diseases associated with it, using a new quantitative assessment method.
- Researchers examined patients with pulsatile tinnitus and idiopathic intracranial hypertension, measuring various cross-sectional areas of TSS and adjacent venous segments.
- Results showed a significant correlation between these measurements and the trans-stenotic pressure gradient (TPG), suggesting that the TSS area/poststenotic segment area ratio could effectively predict TPG.
Effectiveness of Diffusion Tensor Imaging in Determining Cervical Spondylotic Myelopathy.
Turk Neurosurg
March 2021
Malatya Yesilyurt Hasan Calik State Hospital, Department of Radiology, Malatya, Turkey.
Aim: To determine the effectiveness of diffusion tensor imaging (DTI) in diagnosing cervical spondylotic myelopathy (CSM) in patients with no findings detected in conventional magnetic resonance imaging (MRI).
Material And Methods: Fifty-four patients who presented for cervical MRI between January 2016 and June 2016, with symptoms such as neck pain, paresis, and numbness in hands, were included in the study. The patients were split into four groups based on their degrees of spinal stenosis.
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