24 documents found, page 1 of 3
Bleb morphology of glaucoma drainage devices on magnetic resonance imaging
Correia Barão, Rafael; Berhanu, David; Matos, Diogo Bernardo; Barata, Andre; Sousa, Rita; Pinto, LuisPurpose: To evaluate bleb morphology features of different glaucoma drainage devices (GDD) using magnetic resonance imaging (MRI). Materials and methods: Prospective cohort study of GDD and bleb morphology in consecutive glaucoma patients implanted with Ahmed Glaucoma Valve (AGV), Paul Glaucoma Implant (PGI), Baerveldt Glaucoma Implant (BGI) and Ahmed ClearPath (ACP) devices. Thirty-six eyes from 30 consecutive...
Glaucoma triage system: results of implementing a virtual clinic
Matos, Diogo Bernardo; Correia Barão, Rafael; José, Patrícia; Lima-Cabrita, Afonso; Barata, Andre; Pinto, LuisPurpose: This study describes the virtual clinic triage system implementation process at Hospital Santa Maria-Centro Hospitalar Universitário Lisboa Norte (HSM-CHULN) and analyzes its results regarding healthcare outcomes for the patients and the system. Methods: A retrospective analysis was performed, comparing two cohorts (pre-virtual cohort; virtual triage cohort). Outcomes related to waiting time, number of...
The role of optic nerve sheath ultrasonography in increased intracranial pressu...
Berhanu, David; Cardoso Ferreira, Joana; Pinto, Luis; de Sousa, Diana Aguiar; Lucas Neto, Lia; Tavares Ferreira, JoanaObjectives: To review the optimal diagnostic cut-off of ultrasonographic optic nerve sheath diameter (ONSD) in the diagnosis of increased intracranial pressure (IICP). Methods: A systematic search was conducted of available studies assessing the use of ONSD ultrasonography in patients with suspected IICP. Meta-analysis of diagnostic accuracy of ultrasonographic ONSD was performed using a bivariate model of rand...
Improving WiFi communication with surface nodes at near-shore on tidal waters
Gutiérrez Gaitán, Miguel; d'Orey, Pedro; Santos, Pedro Miguel; Ribeiro, Manuel; Pinto, Luis; Almeida, Luís; de Sousa, J. BorgesWireless radio links deployed in aquatic areas (e.g., sea, rivers, lakes, estuaries) are affected by the conductive properties of the water surface, strengthening signal reflections and increasing destructive interference. Recurrent natural phenomena (e.g. tides or waves) cause shifts in water levels further impairing propagation over water surfaces. In this work, we aim to mitigate the detrimental impact of ti...
Modeling LoRa Communications in Estuaries for IoT Environmental Monitoring Systems
Gutiérrez Gaitán, Miguel; D'Orey, Pedro; Cecílio, José; Rodrigues, Marta; Santos, Pedro Miguel; Pinto, Luis; Oliveira, Anabela; Casimiro, AntónioLow-power wide-area networks are extending beyond the conventional terrestrial domain. Coastal zones, rivers, wetlands, among others, are nowadays common deployment settings for Internet-of-Things nodes where communication technologies such as LoRa are becoming popular. In this article, we investigate large-scale fading dynamics of LoRa line-of-sight links deployed over an estuary with characteristic intertidal...
Cataract surgery and IOP: a systematic review of randomised controlled trials
Brízido, Margarida; Rodrigues, Pedro Filipe; Almeida, Ana C.; Pinto, LuisPurpose: Cataract and glaucoma are two of the most common ocular comorbidities. Cataract surgery has been shown to influence intra-ocular pressure (IOP) in patients with glaucoma; nevertheless, the extent of this effect remains controversial, especially in patients with open-angle glaucoma (OAG). The aim of this review is to determine the real effect of cataract surgery on IOP change in patients with OAG, focus...
A non-infectious uveitis multidisciplinary clinic in a tertiary referral center...
Leal, Ines; Romão, Vasco C.; Sousa Mano, Sofia; Khmelinskii, Nikita; Campanilho-Marques, Raquel; Ponte, Cristina; Macieira, CarlaNon-infectious uveitis (NIU) is a group of sight-threatening diseases that generates significant burden for the healthcare systems due to its adverse outcomes, irreversible structural complications in the eye with loss of visual function, limited clinical expertise and low-grade evidence for best practice. The usefulness of multidisciplinary care, specifically close collaboration between Rheumatologists and Oph...
Wi-Fi-based network systems design over freshwater: Experimental evaluation usi...
Gutiérrez Gaitán, Miguel; Santos, Pedro Miguel; Pinto, Luis; Almeida, LuísTo experimentally assess the impact of surface reflection on the received signal strength of a set of short-andmedium-range shore-to-shore links (<200 m) that use antennas installed at two heights, at a few meters above surface (<3 m).
Experimental evaluation of the two-ray model for near-shore WiFi-based network ...
Gutiérrez Gaitán, Miguel; Santos, Pedro Miguel; Pinto, Luis; Almeida, LuisIn the design of shore-to-shore and shore-to-vessel wireless links, the impact of the ray reflected on the surface is often neglected. It adds that, in some coastal areas, the geometry of the reflection changes over time due to tides. When choosing an antenna height for an inshore node, often the largest possible height is used, but this approach can lead to signal degradation. The two-ray model is the most fun...
Cooperative Bicycle Localization System via Ad Hoc Bluetooth Networks
Santos, Pedro Miguel; Rosa, Vera; Pinto, Luis; Aguiar, AnaBicycles are becoming increasingly more equipped with embedded connected devices, by design or through after market products, to support applications such as fitness monitoring and tracking. Bluetooth (BT) and BT Low Energy (BLE) technology is often embedded in such devices to support connectivity to a personal mobile device or a dock, when parked. BT/BLE transmit periodic beacons for node discovery that can be...