An acute ischaemic stroke appears when a blood clot blocks the blood flow in a cerebral artery. Intra-arterial thrombectomy, a mini-invasive procedure based on stent technology, is a mechanical available treatment to extract the clot and restore the blood circulation. After stent deployment, the clot, trapped in the stent struts, is pulled along with the stent towards a receiving catheter. Recent clinical trials have confirmed the effectiveness and safety of mechanical thrombectomy. However, the procedure requires further investigation. The aim of this study is the development of a numerical finite-element-based model of the thrombectomy procedure. In vitro thrombectomy tests are performed in different vessel geometries and one simulation for each test is carried out to verify the accuracy and reliability of the proposed numerical model. The results of the simulations confirm the efficacy of the model to replicate all the experimental setups. Clot stress and strain fields from the numerical analysis, which vary depending on the geometric features of the vessel, could be used to evaluate the possible fragmentation of the clot during the procedure. The proposed in vitro/in silico comparison aims at assessing the applicability of the numerical model and at providing validation evidence for the specific in vivo thrombectomy outcomes prediction.
1 January 2021 in Biochemical and Biophysical Research Communications
Background: Sex-based variations in brain structure, hormonal balance, and neurochemistry may influence symptom presentation and recovery after mild traumatic brain injury (mTBI). This systematic review investigated sex-related differences in mTBI severity, symptoms, and recovery outcomes across different injury mechanisms. Methods: This review followed PRISMA 2020 guidelines and was registered with PROSPERO (CRD420251011379). Searches were conducted in PubMed, SPORTDiscus, Web of Science, and Scopus for articles published between 2000 and 2024. Eligible studies included adults (≥18 years) diagnosed with mTBI or concussion (Glasgow Coma Scale 13–15) with quantifiable outcome data for both sexes. Data extraction and quality assessment followed the JBI critical appraisal tools. Results: Forty-one studies involving 15,656 participants (8671 males; 6985 females) met the inclusion criteria. Female participants reported a greater symptom burden, higher pain intensity, and longer recovery times for gait abnormalities and return to activity compared with males. Neuroimaging studies showed more extensive white matter alterations in females, whereas males displayed greater reductions in cerebral blood flow. Cognitive and neurosensory outcomes revealed poorer cognitive performance, slower reaction times, and higher rates of vestibular–ocular and visual abnormalities in females. A limited number of studies explored electrophysiological measures, indicating sex-based differences in early brain responses to emotional stimuli. Conclusions: Sex plays an important role in symptom presentation and recovery after mTBI. Female patients demonstrate heightened vulnerability across several clinical domains, likely due to biological and neurochemical differences. Recognising these sex-specific patterns can support more targeted diagnostic and rehabilitation strategies. Future research should further explore the structural and biochemical mechanisms underlying these differences to improve precision in mTBI management.
Purpose: This is an account of student experiences with the 2020/2021 Johnson & Johnson (J&J) Women in Science, Technology, Engineering, Mathematics, Manufacturing and Design (WiSTEM2D) intervention programme at the University of Limerick (UL).Design/methodology/approach: The WiSTEM2D programme supports female undergraduate students undertaking science, technology, engineering, mathematics, manufacturing and design (STEM2D) courses, helping them develop and grow in their degrees, research and beyond.Findings: During the programme, data were gathered from students in the form of qualitative information, which was used to analyse perceptions of the programme. This analysis revealed that students found the WiSTEM2D programme beneficial to them and that it improved their confidence levels, career knowledge and overall networking abilities.Originality/value: WiSTEM2D is one of several initiatives globally that are attempting to empower and encourage women to be active in STEM.