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Biomedical subjects

G Guevara

Publications and source records attributed to G Guevara.

8 recordsLinked to original sources
PubMed1996

[Our experience in endourology].

Exposition of the experience accrued over 8 years in endo-urological procedures performed to 303 patients divided in 2 groups: Lithiasic (Group I) and Non-lithiasic (Group II) patients. Ninety-two (92) percutaneous nephrostomies in 69 patients and 235 ureteroscopies in 234 patients were accomplished, removing 324 calculi and resolving other obstructive conditions. The rate of success was 85% and 98% for the percutaneous nephrostomies and ureteroscopies, respectively. Complications were reported in 7 patients after percutaneous nephrostomy and in 14 patients during ureteroscopy. Most of these complications resolved with the use of endoscopic techniques except in two patients who required open surgery. There were no deaths in the present series. The advantages of applying this technique over the conventional one are discussed.

Adult↗
PubMed1995

Differential clinical and epidemiological features in children with Campylobacter diarrhoea, mixed-agent diarrhoea and Campylobacter diarrhoea plus parenteral infections.

A prospective study of 111 young Peruvian children with Campylobacter jejuni diarrhoea showed that it behaves as an endemic enterotoxigenic-like, waterborne, milkborne, and zoonotic disease. Although there were no definite differential features between pure C. jejuni diarrhoea, mixed-agent diarrhoea, and C. jejuni diarrhoea plus parenteral infections, children with C. jejuni diarrhoea plus parenteral infections were all inpatients, were more frequently malnourished and more frequently exhibited systemic symptoms. Campylobacter jejuni associated with other enteric pathogens did not seem to act synergistically as the disease was not particularly severe in this group.

Campylobacter Infections↗
PubMed1993

Acute diarrhoea and Campylobacter in Peruvian children: a clinical and epidemiologic approach.

A study performed on Peruvian children < 10 years of age and their controls showed that Campylobacter jejuni is a leading cause of diarrhoea. Infants 1 year old or younger were the most affected. The disease was usually moderately severe, although > 50 per cent of patients required i.v. fluid therapy. Campylobacter was also more frequent in malnourished patients, who come from socio-economically deprived groups, with overcrowding, poor sanitation, and frequent contact with domestic birds and animals. The seasonal behaviour suggests that diarrhoea caused by Campylobacter is endemic in this area.

Acute Disease↗
PubMed1993

Occult blood and fecal leukocytes as screening tests in childhood infectious diarrhea: an old problem revisited.

During a 24-month period 446 children with diarrhea and 16 controls had examination of their stools for leukocytes and for occult blood. Fecal leukocytes were found in 36, 16 and 18% of children with Salmonella-Shigella-Campylobacter, rotavirus or enterotoxigenic Escherichia coli, or cryptosporidial diarrhea, respectively. Similarly 43, 39 and 38% of these groups, respectively, as well as 13% of controls had occult blood. Notably 70% of 10 Shigella cases had fecal leukocytes. In 166 children with mixed pathogens leukocytes were seen in 27 and 8% of children with Salmonella-Shigella-Campylobacter or noninvasive pathogen, respectively. Likewise 44 and 18% of these groups had occult blood. Agreement between both tests being positive was poor, the highest result being 50% for Shigella. Dysentery combined with both tests positive was associated with 15 (88%) cases of invasive agents present in stool cultures, and combination of dysentery with fecal leukocytes was associated with 21 (72%) cases of invasive agents recovered. The results of these tests should be interpreted in the context of the clinical situation. A combined clinical-epidemiologic and screening tests-based approach to infectious diarrhea of childhood is suggested.

Campylobacter Infections↗
PubMedDate not supplied

[Celiac disease in adolescents].

Nutritional status, sexual maturation and intestinal absorption were assessed in 16 adolescent celiac patients (12 females) at ages 12 and 18 year. Weight/age, height/age and weight/height were 75.5% (51.6-94.8), 90.3% (76.8-104.6) and 99.1% (76.3-112.9) at 12 years and 85.6% (64.0-105.2), 93.8% (85.9-101.2) and 110% (76.5-121.9) at 18 years of age, respectively. Sexual maturation (Tanner) was at stage I in 31%, and at stage II in 43.7% of patients at age 12 years and it had reached maturity in 75% of them at 18 years. Menarche occurred between 12 and 14 years of age, except in 3 patients in whom it was retarded. Mean serum carotene levels were 125 and 108.5 ug/dl at ages 12 and 18 years respectively. Delayed weight and height progress in this particular group of patients might be explained by low socio-economic conditions, late diagnosis, and poor adherence to gluten-free diet.

Adolescent↗