The direct determination of chromium in urine by selective volatilization with atom reservoir atomic absorption.
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Biomedical subjects
Publications and source records attributed to J G Gonzalez.
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Preoperative diagnosis of complications due to foreign bodies in the gastrointestinal tract is uncommon by conventional radiographic methods. We present two cases of gastric and duodenal perforation secondary to fish bone ingestion, diagnosed preoperatively by CT.
In Mexico, no effort has been made to estimate a nationwide prevalence rate of asthma. However, in the last 10 years several local studies have been carried out that analyze the same age cohort that have similar methodological features, enabling us to have a reference from which to look at childhood asthma prevalence in Mexico. Applying statistical analysis to all the surveys, we obtained a prevalence rate of childhood asthma of 11.85% with a confidence interval of 11.32% and 12.38%. We have data that let us know that the prevalence of asthma in México is increasing as in other countries. The comportment of asthma medication is changing very slowly, at least in the commercial market.
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