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V Sanchez

Publications and source records attributed to V Sanchez.

61 records · Page 4Linked to original sources
PubMedDate not supplied

Participatory research strategies in nuclear risk management for native communities.

The Nuclear Risk Management for Native Communities (NRMNC) project is a collaborative academic, community-based, tribal project, which conducts the three essential elements of participatory research: research, education, and community action, named here as "community-based hazards management." This article describes the goals and outcomes of this effort in assisting Native American communities in Nevada, Utah, and Southern California affected by nuclear fallout from U.S. weapons testing in the 1950s and 1960s. The NRMNC project sought to create new models for dealing with health research and risk communication needs in an environmental justice setting. The following results of this four-year project are discussed: (1) building a community-based environmental health infrastructure, (2) building community capacities through workshops and educational materials, (3) conducting both technical and community research, and (4) facilitating community-based hazards management planning. We describe such positive outcomes as the improvements in the scientific database through participatory research activities, the development of equitable relationships between scientists and community members, and the creation of a sustaining program intervention for long-term community needs. The project's outcomes are presented as an expansion to limited scientific risk management outcomes in the environmental health field that often are solely quantitative and lack relevance to community concerns about environmental health impacts from contamination.

California↗
PubMedDate not supplied

Diagnosis of pit and fissure caries using frequency-domain infrared photothermal radiometry and modulated laser luminescence.

Non-intrusive, non-contacting frequency-domain photothermal radiometry (FD-PTR or PTR) and frequency-domain luminescence (FD-LUM or LUM) have been used with 659- and 830-nm laser sources to assess the pits and fissures on the occlusal surfaces of human teeth. Fifty-two human teeth were examined with simultaneous measurements of PTR and LUM and were compared to conventional diagnostic methods including continuous (dc) luminescence (DIAGNOdent), visual inspection and radiographs. To compare each method to the others, sensitivities and specificities were calculated by using histological observations as the gold standard. With the combined criteria of four PTR and LUM signals (two amplitudes and two phases), it was found that the sensitivity of this method was much higher than any of the other methods used in this study, whereas the specificity was comparable to that of dc luminescence diagnostics. Therefore, PTR and LUM, as a combined technique, has the potential to be a reliable tool to diagnose early pit and fissure caries and could provide detailed information about deep lesions. Using the longer wavelength (830-nm) laser source, it has been shown that detection of deeper subsurface lesions than the 659-nm probe provides is possible.

Body Temperature↗
PubMedDate not supplied

[The use of urea carbon 14 in breath tests as diagnostic method for Helicobacter pylori infections].

The Helicobacter Pylori has been indicated as a pathologic agent in the pathogenesis of antral gastritis, gastric and duodenal ulcers and probably in gastric cancer. Due to the high incidence of this infection in our place, we decided to look for a diagnostic method quick to perform, sensitive, reliable and no invasive. The breath test of 14C urea, based in the production of urea by the H. Pylori, represents this alternative. We have found, using does of 1 microCi, a high correlation with the diagnosis of H. Pylori by biopsies. We determined as negative less than 100 DPM, doubtful between 100 and 200 DPM and positive more than 200 DPM. The high pick of the curve keeps tight relation with the degree of infection. We checked this when we suppressed the H. Pylori with bismuth subsalicylate. The breath 14C Urea test showed high sensitivity (100%) and specificity (85.71%). We conclude that this breath test is an alternative way of diagnosing and follow up for H. Pylori infections. It is highly sensitive, reproducible and no invasive.

Adult↗