Search PubMed⌕ Search

Biomedical subjects

J Riera

Publications and source records attributed to J Riera.

101 records · Page 6Linked to original sources
PubMed1969

[Not Available].

Explore the source record for details and available documents.

History, Modern 1601-↗
PubMedDate not supplied

[Endoscopic management of foreign bodies in the esophagus. Results of a retrospective series of 501 cases].

We present the results of a retrospective study of endoscopic management (with flexible endoscopy) in 501 patients admitted for suspected ingestion of a foreign body between 1977 and 1997. The mean age of the patients was 55.73 19.38. Foreign bodies were found in the esophagus in 322 patients (64.3%) and endoscopic removal was successful in 307 (95.35%). More experienced endoscopists, with more than 45 cases, had a higher success rate (98.1%) than did less experienced endoscopists (87.9%) (p < 0.01). The most frequent type of foreign body in our series was meat bolus (32.8%). Underlying disease was found in 38.9%, and peptic stenosis was the most frequent. The only severe complication found was esophageal perforation in one patient (0.3%). Emergency flexible endoscopy is the most effective method for managing patients admitted for suspected ingestion of a foreign body and for the removal of foreign bodies located in the esophagus.

Adult↗
PubMedDate not supplied

Simple colorimetric method for seminal plasma zinc assay.

Zinc concentration in seminal plasma is one of the best biochemical parameters with which to assess prostatic function in the study of male infertility. Nevertheless, this parameter is not determined in many laboratories because of technical difficulties. In this paper a simple colorimetric method for seminal plasma zinc assay is presented. This assay is performed with only one reagent solution making deproteinization and extraction with organic solvents unnecessary. The method is based on the reaction between 1-(2-pyridylazo)-2-naphthol and zinc which yields a coloured complex, that is soluble in the reagent solution when dodecyl hydrogen sulfate sodium salt is present. The solubilized complex has an absorbance peak at 560 nm. The accuracy of this method is proved by statistical comparison with atomic absorption spectrophotometry. Furthermore, the method has a good precision and is free of interference.

Colorimetry↗
PubMedDate not supplied

[Not Available].

Explore the source record for details and available documents.

History, Modern 1601-↗
PubMedDate not supplied

[A prospective study of the functioning of 2 types of enteral nutrition catheters].

The problems of disintubation and obstruction of nutritional catheters are common during treatment with enteral nutrition. This prospective study has been designed to evaluate the differences in the frequency of obstruction between two different types of enteral nutrition catheter. Catheter A (Silk, Ibys) with one single lateral outlet, wide, long and with a curved edge, and Catheter B (Nutrisoft M, Kabi-Pfrimmer), with several smaller lateral holes, 46 nutritional periods were studied, divided into two groups: first group, n = 32 (catheter A) and second group n = 14 (catheter B, Nutrisoft M, Kabi-Pfrimmer). There were no significant differences between both groups for the type of diet administered, osmolarity, speed, volume administered, number and duration of interruptions, external fixation, washing of the catheter and duration of the nutritional period. The catheter slipped out in 21 periods (46%). Obstruction of the catheter was the cause of disintubation of the catheter in eight cases, five of the cases with catheter A (15%) and three cases with catheter B (21%); there were no significant differences between the values for both. These results indicate that the frequency of obstruction is similar with both catheters; however, the Silk catheter may have a better tolerance and be easier to intubate, due to its smaller external diameter.

Catheterization↗
PubMedDate not supplied

[Energy consumption in patients with Crohn's disease. An evolutionary study during hospitalization].

In Crohn's disease, weight loss and malnutrition are very frequently occurring problems. One explanation of these findings could be an increased energy expenditure. Eleven patients were studied, of which six were women and five were men, during a hospital stay for an active episode of Crohn's disease. In three patients the small intestine was affected, in five the colon, and in the last three both the ileum and the colon were affected. Van Hees' activity index on admittance was 196 +/- 52 (132-265). The energy expenditure at rest (ECR) on admittance, was 11% higher than that found in the normal population (p: n.s.). The energy expenditure decreased weekly, in a statistically significant way, during hospitalization. No significant relationship was found between the Van Hees activity index and any of the parameters used to evaluate the energy needs. Those patients whose body weight was less than 90% of the ideal body weight, presented pathologically elevated energy needs when the energy expenditure was expressed in kcal/kg (p = 0.003). Fever was the only analyzed parameter which showed a significant correlation with the changes in energy expenditure: measured by the oxygen consumption index (p = 0.003) and by the percentage of REE (p = 0.006).

Adolescent↗