Browsing by Author "Raposo, Maria"
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- Detection and adsorption of Triclosan on sensors based on PAH/PVS thin-filmsPublication . Pereira-da-Silva, J.; Zagalo, P. M..; Magro, Cátia; Pinto, Iola; Ribeiro, P. A.; Raposo, MariaGiven the vital role of water in life it is paramount to thrive and succeed in areas that look to clean and prevent further contamination in water bodies. Triclosan (TCS) is present in most of our day-to-day products and if left unchecked it can lead to long-term significant problems due to its many inauspicious effects in both human and animal health. Thus arose the need to develop sensors to detect and possibly remove TCS for aqueous solutions. This work was rooted on this premise and sensors based on LbL polyectrolyte thin-films were developed, such as poly(allylamine hydrochloride) (PAH) and poly(vinylsulfonic acid, sodium salt) (PVS), namely (PAH/PVS)(10) and (PAH/PVS)/PAH(10). The goal of this work was to analyze the amount of TCS adsorbed onto reused (PAH/PVS)(10) and (PAH/PVS)/PAH(10) LbL thin-films when immersed in TCS aqueous solutions with decreasing pH. It was demonstrated that sensors with an outer layer of PAH led to a significantly better TCS molecules adsorption (removal). Additionally, sensors composed of (PAH/PVS)(10) presented higher sensibility in discriminating TCS solutions with concentrations between 10(-5) M and 10(-8) M, using impedance spectroscopy.
- Effects of ankle foot orthoses on the gait patterns in children with spastic bilateral cerebral palsy: a scoping reviewPublication . Ricardo, Diogo; Raposo, Maria; Cruz, Eduardo; Oliveira, Raul; Carnide, Filomena; Veloso, António; João, FilipaBackground: Cerebral palsy (CP) is the most common cause of motor disability in children and can cause severe gait deviations. The sagittal gait patterns classification for children with bilateral CP is an important guideline for the planning of the rehabilitation process. Ankle foot orthoses should improve the biomechanical parameters of pathological gait in the sagittal plane. Methods: A systematic search of the literature was conducted to identify randomized controlled trials (RCT) and controlled clinical trials (CCT) which measured the effect of ankle-foot orthoses (AFO) on the gait of children with spastic bilateral CP, with kinetic, kinematic, and functional outcomes. Five databases (Pubmed, Scopus, ISI Web of SCIENCE, SciELO, and Cochrane Library) were searched before February 2020. The PEDro score was used to assess the methodological quality of the selected studies and alignment with the Cochrane approach was also reviewed. Prospero registration number: CRD42018102670. Results: We included 10 studies considering a total of 285 children with spastic bilateral CP. None of the studies had a PEDro score below 4/10, including five RCTs. We identified five different types of AFO (solid; dynamic; hinged; ground reaction; posterior leaf spring) used across all studies. Only two studies referred to a classification for gait patterns. Across the different outcomes, significant differences were found in walking speed, stride length and cadence, range of motion, ground force reaction and joint moments, as well as functional scores, while wearing AFO. Conclusions: Overall, the use of AFO in children with spastic bilateral CP minimizes the impact of pathological gait, consistently improving some kinematic, kinetic, and spatial-temporal parameters, and making their gait closer to that of typically developing children. Creating a standardized protocol for future studies involving AFO would facilitate the reporting of new scientific data and help clinicians use their clinical reasoning skills to recommend the best AFO for their patients.
- Reliability of lower extremity kinematics in three-dimensional gait measurements in children with cerebral palsyPublication . Ricardo, Diogo; Teles, Júlia; Raposo, Maria; Veloso, António; João, FilipaBackground: Cerebral Palsy is a complex pathology that describes a group of motor disorders with different presentations and functional levels. Three-dimensional gait analysis is used in the assessment of CP children to assist in clinical decision-making and assessing outcomes in the rehabilitation process. Due to the CP intra-subject gait variability, it’s crucial to access the repeated gait measurements to evaluate the response to therapeutic interventions in the rehabilitation process. Aim of the study: The objective of this study was to determine the intra-subject measurement reliabilities of the kinematic parameters of children with hemiplegic and diplegic types of cerebral palsy.
- The gait profile score to assess the effects of ankle-foot orthoses in the gait of children with cerebral palsyPublication . Ricardo, Diogo; Raposo, Maria; Veloso, António; João, FilipaIntroduction: The ankle-foot orthosis is the most common non-invasive therapeutic intervention used to correct gait deviations, especially in children with Cerebral Palsy (CP). Several studies demonstrated that its use improved spatio-temporal and kinematic outcomes. However, biomechanical reports can be complex and may need experience to correctly interpret the results. Gait deviation indices, such as the Gait Profile Score (GPS) intend to summarize some clinically meaningful parameters and clarify in which way an ankle-foot orthosis impacts gait in children with CP. Research question: The aim of this study was to assess if GPS reflects the effect of AFO use on a sample of children with CP while walking.