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Biomedical subjects

U Tachinardi

Publications and source records attributed to U Tachinardi.

8 recordsLinked to original sources
PubMed2001

Real time information from bedside monitors as part of a web-based patient record.

Traditional paper-based Medical Records, and even most of their digital counterparts, represent historical patient information. On the other hand new generations of Point-of-Care devices can be connected to standard networks and deliver streams of real time data through an Intranet, or even the Internet. Vital signs provided by IP-based devices can then be viewed at remote stations. Merging both worlds, real time and historical, in the pursuit of a comprehensive EPR is the main challenge of the present project. The basic infra-structure is composed of three main components: an existing Web-based EPR viewing station1 (Web-EPR); a fully integrated HIS/PACS system1; and a monitoring network (Siemens Infinity Network 2). Communication between the components was obtained by developing interfaces based on both HL7 and Siemens protocols the later only for waveforms. For the graphical display a web-browser-based application of the streamed signals was developed and integrated into the existing Web-EPR. This addition expanded the Web-EPR capabilities providing means to include real time signals and calculated parameters on the set of information already available. Some extra features of this project include: one-way SMS messaging of the parameters, interactive WAP access and a DICOM compliant storage of signal waveforms.

Computer Security↗
PubMed1998

Internet and healthcare in Brazil: the role of the Working Group for Healthcare (GT Saúde).

This paper introduces the GT Saúde initiative in Brazil. The group is part of the Brazilian Internet project, which goals are to depict how Internet can be useful to the society. The mission of the GT Saúde group is to foster Internet applications on the healthcare area. The main projects currently under development are presented: Multicom-21, using large bandwidth connections on telemedicine; the Unified Health Record, using Internet and smart-cards for a national minimum patient data set; the Brazilian Virtual Hospital, that presents a large amount of useful information and links for healthcare professionals and people in general; the National Healthcare Information Network (RNIS), that uses Internet as a medium for data exchange among the state secretaries and publishing statistics from the national healthcare system (SUS) for general public access; and finally the virtual university proposal, which uses Internet for education and is offering its first course on nutrition. The heterogeneity of the projects is meant and is part of the group's task, which is to cover the subject as widely as possible. Through this 'demonstration' projects the group is trying to prove the usefulness and benefits of using Internet technologies, even (or mainly) on a developing country with an inadequate healthcare situation. In its short existence the GT Saúde group has achieved several of its original goals. The most relevant accomplishments are: putting together different groups, eliciting synergy across the projects and encompassing a broad spectrum of applications (the 'demonstration factor').

Brazil↗
PubMed1998

Renewing information infrastructure at Hospital das Clínicas.

In this paper we describe the process of renewing the Informatics infrastructure of Sao Paulo University Medical School Hospital, a very complex environment. Our proposal consists of a change in the paradigm of Informatics and the use of Information Technology in the hospital. That change aims at making information available to the hospital, its managers, health care workers and patients. The paradigm change is reflected in every aspect of the new infrastructure: human resources, methods, and organizational structure, as we intend to demonstrate in this paper. This process is expected to be concluded by the end of this year, yielding benefits regarding costs, efficiency, and better patient care.

Brazil↗
PubMed1995

Hypermedia patient data retrieval and presentation through WWW.

WWW can be a helpful tool for PACS and HIS data retrieval and presentation. The use of gateways to access both text and hypermedia databases (images and video) enables fetched data to be presented in virtually any computer system. WWW browsers provide a very friendly interface and require little training to operate. This paper presents a prototype that uses a SQL gateway for accessing relational patient databases. The dataset used here include text data from reports of diagnostic procedures as well as pointers to the corresponding images. Images can be displayed by the browsers' viewers.

Computer Communication Networks↗
PubMed1993

Integrating Hospital Information Systems. The challenges and advantages of (re-)starting now.

With the new technologies available today, more complex and useful Hospital Information Systems (HIS) can be designed and implemented. These new technologies have allowed that information from different sources and nature such as documents, images and signals be integrated within a single environment. Open standards, reliable networks, powerful hardware and software and lower prices are among the issues that make all this possible. One of the main issues is what to do with old systems that do not adhere to this new HIS concept. At the Heart Institute (InCor), a decision was made towards starting developing a new system called I3S. This paper gives a brief description of that system.

Brazil↗
PubMed1989

Method to localise myocardial infarction using magnetocardiography: simulation studies.

The work presents a method for localising regions of myocardial infarction (MI) using magnetocardiography, which is validated by simulation techniques. We have verified that the first two principal components of magnetocardiographic signals obtained from torso mapping within a normal group are very similar even in experimental measurements. So, if we have the temporal eigenvectors of a normal group, these can be used as an orthonormal basis for estimating the signals of a patient being tested. Analysis of the residual signals using singular value decomposition (SVD) allows the localisation of regions of MI. Comparisons are made with a similar method which uses spatial eigenvectors as its basis. It is shown that our approach is able to localise the equivalent current dipoles which generate MI even when they are not orthogonal to the spatial eigenvectors.

Computer Simulation↗
PubMedDate not supplied

Lossy compression techniques, medical images, and the clinician.

There has been increasing interest in the storage and retrieval of medical images in hospitals and clinics here in Brazil and elsewhere. At the Heart Institute of São Paulo, with thousands of image-based procedures performed each month, the pursuit of optimal transmission and storage methods for digital images is a major concern. The use of data-compression techniques can reduce the enormous amount of imaging data to be stored or transmitted across a computer network, so that the efficiency of the computing system is preserved. The techniques for image compression can be categorized as "lossless" or "lossy," with "lossy" techniques being those in which some, supposedly irrelevant information is lost. Lossy techniques are much more efficient than lossless ones, achieving data-compression ratios as high as 100:1.

Algorithms↗