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Selection of the apposite vacuum extractor during operative delivery: A biomechanical study.
J Chin Med Assoc
December 2024
Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan, ROC.
Background: Operative delivery is a technique used during vaginal or cesarean birth to facilitate the patient's labor course through the assistance of a vacuum extractor. This method is increasingly used compared with forceps. This study aimed to investigate the forced effects of vacuum extractors comprising vacuum cups with different thicknesses on the fetal head and the vacuum extractor during vacuum-assisted delivery and to determine the optimal thickness for reducing the failure rate and minimizing neonatal and maternal morbidity.
View Article and Find Full Text PDFBackground: In recent efforts to improve early identification, staging, and prediction of risk of persons at risk for vascular contributions to cognitive impairment and dementia (VCID) in relation with small vessel disease (SVD), the MarkVCID consortium has worked to identify and validate fluid- and imaging-based biomarkers for SVD associated with VCID. Free water (FW) measured derived from diffusion tensor imaging and one of the selected neuroimaging biomarker "kits", has been demonstrated to have excellent instrumental validity and to be a sensitive biomarker of cognitive performances. We sought to further examine FW clinical relevance by investigating whether FW predicts cognitive worsening over time.
View Article and Find Full Text PDFBackground: The amplitude of resting-state electroencephalographic (rsEEG) rhythms is a promising neurophysiological biomarker to investigate the abnormalities of oscillatory neurophysiological thalamocortical mechanisms related to the general cortical arousal and vigilance in wakefulness in patients with dementia due to neurodegenerative diseases as Alzheimer's disease (ADD), Parkinson's disease (PDD) and Lewy Body disease (DLB). Here, we tested the hypothesis that the reactivity of posterior rsEEG alpha (about 8-12 Hz) rhythms during the transition from eyes-closed to -open condition may be lower in PDD patients than in DLB patients.
Methods: A Eurasian database provided clinical-demographic-rsEEG datasets in 35 ADD patients, 65 PDD patients, 30 DLB patients, and 25 matched cognitively unimpaired (Healthy) persons.
Background: Amyloid and alpha synuclein proteins are brain biomarkers of different neurodegenerative diseases, many years before symptoms. We have shown that imaging dye-free with polarized light makes retinal amyloid deposits visible as a biomarker, in the brain, of amyloid and Alzheimer's disease (AD) severity. Here, we extend to presumed retinal alpha synuclein deposits in those with brain pathology consistent with alpha synuclein.
View Article and Find Full Text PDFThe role of high-resolution cartilage thickness distribution for contact mechanics predictions in the tibiofemoral joint.
Proc Inst Mech Eng H
January 2025
Institute of Medical and Biological Engineering, University of Leeds, Leeds, UK.
Subject-specific finite element models of knee joint contact mechanics are used in assessment of interventions and disease states. Cartilage thickness distribution is one factor influencing the distribution of pressure. Precision of cartilage geometry capture varies between imaging protocols.
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