Search results for "Computer"

Twitch interpolation during equal-intensity voluntary and electrically-evoked isometric contractions of the quadriceps muscle

2005

It has been suggested that, during contractions triggered by electrical stimulation, motor units are recruited in a reversed sequence compared to voluntary contraction. The classic view is that lar...

Adaptation and Refinement of Validated Risk Screening Tools in the Spanish Healthcare System

2013

Abstract The aim of this study is to develop a tool to screen elders at risk of hospital readmissions adapted to Spanish target population. The development of this new tool is based on the validated instrument The Community Assessment Risk Screen – CARS –, which is being applied in a sample of 1.000 older patients. The adaptation and refinement of CARS is being carried out through the compilation of new potential variables from primary care clinicians to predict patients at risk of readmissions. The introduction of this new instrument adapted to Spanish target population will provide a potential tool to identify prematurel y patients at risk of hospital readmissions.

Compassionate Use of the PASCAL Transcatheter Valve Repair System for Severe Tricuspid Regurgitation

2019

Abstract Objectives The purpose of this observational first-in-human experience was to investigate the feasibility and safety of the PASCAL transcatheter valve repair system and its impact on short-term clinical outcomes in patients with severe tricuspid regurgitation (TR). Background Transcatheter repair of severe TR is a promising treatment option for patients at prohibitive surgical risk. Large leaflet coaptation gaps and tethering represent common features that challenge the application of transcatheter repair techniques. Methods Twenty-eight patients with severe TR were treated with the PASCAL system in a compassionate use experience at 6 sites. All patients had heart failure due to se…

Unsupervised Numerical Characterization in Determining the Borders of Malignant Skin Tumors from Spectral Imagery

2021

For accurate removal of malignant skin tumors, it is crucial to assure the complete removal of the lesions. In the case of certain ill-defined tumors, it is clinically challenging to see the true borders of the tumor. In this paper, we introduce several computationally efficient approaches based on spectral imaging to guide clinicians in delineating tumor borders. First, we present algorithms that can be used effectively with simulated skin reflectance data. By using simulated data, we gain detailed information about the sensitivity of the different approaches and how variables defined by algorithms act in the skin model. Second, we demonstrate the performance of the algorithms with spectra…

ECG Analysis for Ventricular Fibrillation Detection Using a Boltzmann Network

2015

Arrhythmias consist on electrical alterations in the heart beat control. They can be identified by means of surface ECG leads. The main goal of this work is to provide a signal classification based on ECG signal waveform in the time-frequency domain especially targeted to Ventricular Fibrillation detection. The use of a classifier based on a Boltzmann network is proposed. However, a previous signal preprocessing is also required so that the Boltzmann network is fed with the appropriate data. In this case, an R-wave detector is used; after that, the Pseudo Wigner-Ville time-frequency distribution is obtained. This distribution is used to train and test the network, which handles it as an ima…

Stereoscopic Viewing Enhances Visually Induced Motion Sickness but Sound Does Not

2012

Optic flow in visual displays or virtual environments often induces motion sickness (MS). We conducted two studies to analyze the effects of stereopsis, background sound, and realism (video vs. simulation) on the severity of MS and related feelings of immersion and vection. In Experiment 1, 79 participants watched either a 15-min-long video clip taken during a real roller coaster ride, or a precise simulation of the same ride. Additionally, half of the participants watched the movie in 2D, and the other half in 3D. MS was measured using the Simulator Sickness Questionnaire (SSQ) and the Fast Motion Sickness Scale (FMS). Results showed a significant interaction for both variables, indicatin…

Läßt sich das sonomorphologische Lymphknotenstaging bei Kopf-Hals-Karzinomen automatisieren?

2000

OBJECTIVES B-scan ultrasound imaging is an obligatory examination of great clinical relevance in patients with head and neck cancer. The procedure, however, is dependent on an experienced examiner and thus requires higher personal resources than other examination techniques. In addition, its subjective character leads to possible deficits in reliability and objectivity. Established sonomorphologic criteria (echo-contour, echo-density, echo-structure, boundary) should therefore be matched to the findings of computer aided sonomorphometry. METHOD 200 sonographic images of the cervical region of patients with oral carcinoma were analysed semi- and fully automatically as well as interactively b…

Global health training in paediatric residency programs: the Italian experience

2015

Osservatorio Nazionale Specializzandi Pediatria (ONSP) is an Italian association of residents in paediatrics, and one of its interests is to support paediatric training in developing countries. In 2014, for this purpose, ONSP performed a survey with the aim of describing interest, participation, resources, and obstacles of residents who are involved in global health training within paediatric residency programs. Once the final data were known, an informative brochure was produced for publicizing the results of this survey and the projects that Italian Pediatric Schools have activated in developing countries. 35 of 38 paediatric residency schools (92%) participated in the survey. 67% of them…

PO-55 The persistence of residual vein thrombosis, after an episode of deep vein thrombosis, and the risk of new overt cancer

2007

Video-assisted surgery: suggestions for failure prevention in laparoscopic cholecystectomy

2014

Background: Surgery differs from other medical specialties in its execution. It is often complex and includes considerable individual variations. Observing problems in operating theatres (OT) allows for the identification of system failures which should be defined for learning purposes to increase patient safety and enhance general safety culture within hospital organizations. This study evaluates a common video-assisted surgical procedure, laparoscopic cholecystectomy (LC) through failure analysis. The profile of the LC procedure and failure sources is presented. Methods: Data consisted video-observations and interviews concerning twelve LC operations performed at a day surgery unit. All o…