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Biomedical subjects

N Mata Rivera

Publications and source records attributed to N Mata Rivera.

14 recordsLinked to original sources
PubMed2003

[Dietary changes in Mexico].

Although the Mexican population has traditionally been malnourished, the prevalence of obesity in children and adults has increased by almost 50 % in the last 10 years. Recent studies show substantial changes in the nutritional status of Mexicans, especially in the pediatric population. Among the factors associated with the development of obesity are overeating, sedentariness, and genetics. The apparent economic development in Mexico, as well as the influence of dietary patterns from other countries, have contributed to modifying lifestyle. Despite measures taken by the health system, iron- and zinc-deficiency anemia continue to be prevalent. The present review aims to describe the changes that have taken place in Mexico in the last few decades leading to a generation of short and obese children, as well as to determine the associated factors in order to promote healthier eating patterns among the Mexican population.

Body Composition↗
PubMed1997

[Hepatoportal sclerosis. 10 years of experience at the National Institute of Pediatrics].

OBJECTIVE: To assess the frequency and clinical picture of Hepatoportal Sclerosis in a population of Mexican children of the Instituto Nacional de Pediatría, México City. BACKGROUND: Hepatoportal Sclerosis is a disease of unknown etiology. It's diagnosis is difficult. The main clinical presentation is splenomegaly with or without hematemesis (portal hypertension). Splenoportography and liver histology study are the best procedures for diagnosis and must be performed by experts. METHODS: We studied 7/106 children with portal hypertension during a period of 10 years, who were seen at the Instituto Nacional de Pediatría, México city. Inclusion criteria were specific findings of splenoportography and histologic changes in liver biopsy. RESULTS: We found 7/106 children. The main clinical manifestation were splenomegaly and hematemesis. We did not find any previous history of contact with arsenic, vinyl chloride or copper sulfate. In 6/7 children a porto-systemic shunt was performed. Only one received propranolol and sclerotherapy. At the time of this report all children have shown a good clinical course.

Adolescent↗
PubMed1996

[Elimination of Helicobacter pylori in patients with recurrent abdominal pain with simultaneous administration of ranitidine, bismuth subsalicylate and clarithromycin].

OBJECTIVE: Elimination of Helicobacter pylori with Chlaritromicin, Bismuth subsalicylate and Ranitidine; and improvement of recurrent abdominal pain. ANTECEDENT: Different antibiotics, antagonist H2 and others has been used for elimination and, or eradication of Helicobacter pylori. METHOD: 22 children with recurrent abdominal pain associated to gastritis and histologic identification of Helicobacter pylori were studied under a period of 18 months (january 1992 to june 1993), at Instituto Nacional de Pediatría, México, D:F: All children were treated simultaneously with: Chlaritromicin, 15 days, Plus ranitidine and bismuth subsalicylate for one month. RESULTS: Helicobacter pylori was eliminate in 14 of 22 children studied. All these children had an important improvement of recurrent abdominal pain. CONCLUSION: Elimination of Helicobacter pylori and clinical improvement was present in 14 of 22 children studied (63.7%).

Abdominal Pain↗
PubMed1995

[Anorectal manometry in children with chronic functional constipation and encopresis].

We performed a rectal motility study in 39 children with encopresis and in 41 with chronic functional constipation. A three balloon system Schuster technic, was employed. Pressure changes were recorded. The "Inflation" reflex was absent in 23/39 children with Encopresis 59% and in 11/41. 26.8% with chronic functional constipation (p < 0.05).

Age Factors↗
PubMed1994

[Arteriovenous malformations of the intestine in children. Study of 8 cases and review of the literature].

Eight children with arteriovenous malformations of the gastrointestinal tract were studied during a two year period (1989-1993). The main localization of the arteriovenous malformations were: ascending colon (five cases), descending colon (five cases), terminal ileum (three cases), rectum and sigmoid (three cases). Diagnosis approach was made with colonoscopy and arteriography. Surgical resection of the affected segments was the therapeutical procedure in seven of the eight cases.

Angiography↗
PubMed1994

[Helicobacter pylori diagnosis in children with recurrent abdominal pain].

We studied 40 children with recurrent abdominal pain during a period of six months (january to june 1993) entered at the gastroenterology service of the Instituto Nacional de Pediatria in México City. In all of then we performed in all of them an upper gastrointestinal endoscopy with 3 biopsies from gastric mucosa (antrum) for histological examination and urease tests. We also did an ELISA test looking for an H. Pylori specific serum IgG response. Our control group were 40 healthy children in whom we did only the ELISA test. We did not find any statistics differences between the histologic findings (gold standard) and the urease and ELISA tests. With IgG antibodies prevalence for H. Pylori in children with recurrent abdominal pain were 57% in contrast with our control group in whom the prevalence was 5%.

Abdominal Pain↗
PubMed1994

[Congenital hepatic fibrosis. Study of 26 cases].

We studied 26 children with congenital hepatic fibrosis during the period 1971-1993. About half of the children were about the 6 years old. Only two had brothers with same disease. The chief clinical manifestation was hematemesis associated or not with liver enlargement, predominantly of left lobe. Only one case showed fever and cholangitis. Liver function tests were usually normal. Twenty-two children had portal hypertension. Liver biopsy was of definitive for diagnosis. Seven children died.

Child↗
PubMedDate not supplied

[Eradication of Helicobacter pylori in patients with recurrent abdominal pain using a triple drug treatment].

BACKGROUND: Different antibiotics, antagonist H2 and others have been used for elimination and/or eradication of Helicobacter pylori. AIMS: Evaluate elimination of Helicobacter pylori with amoxicillin, bismuth subsalicylate and ranitidine; and the improvement of recurrent abdominal pain. METHOD: 20 children with recurrent abdominal pain associated to gastritis and histologic identification of Helicobacter pylori were studied under a period of 18 months (January 1992 to June 1993), at Instituto Nacional de Pediatría, México, D.F. All children were treated simultaneously with: Amoxicillin, 15 days, plus ranitidine and bismuth subsalicylate for one month. RESULTS: Helicobacter pylori was eliminated in 14 of 20 children studied. All these children had an important improvement of recurrent abdominal pain. CONCLUSION: Elimination of Helicobacter pylori and clinical improvement was present in 14 of 20 children studied (70%).

Abdominal Pain↗
PubMedDate not supplied

[Shwachman's syndrome].

BACKGROUND: Shwachman syndrome has been recognized as the second most frequent cause of pancreatic insufficiency in children and its is related to hematological and bony abnormalities. AIMS: To know the main clinical symptoms, analytical data, radiological and sonographic findings in the Shwachman syndrome. MATERIALS AND METHODS: We present a 1 year 4 months old girl with Shwachman syndrome. We reviewed the clinical history taking into consideration height/weight relationship according to percentiles and physical examination. Analytical data: blood counts, fetal hemoglobin, vitamin B12 and folate levels, bone marrow examination, stool cultures and examination for ova and parasites, transaminase levels, sweat electrolytes, serologic tests for viral hepatitis. Radiological studies: bone series and bone age, abdominal sonography and computed tomography. Liver and intestinal biopsies. RESULTS: In this patient we confirmed the presence of exocrine pancreatic insufficiency, dysfunction of the bone marrow and bony abnormalities typical in Shwachman syndrome.

Bone and Bones↗
PubMedDate not supplied

[Meckel's diverticulum. Study of 61 cases].

BACKGROUND: Meckel's diverticulum is a well known disease in children. The main clinical presentations are rectal bleeding and intestinal occlusion. OBJECTIVE: To investigate the frequency, main clinical symptoms, signs, complications, localization, histology and diagnosis in a population of mexican children. METHOD: We studied 61 children who were seen at the Instituto Nacional de Pediatria, Mexico City, during a period of 10 years. The age, sex, symptoms, complications, hematocrit, 99mTc-Pertechnetate scanning, histology, and localization of Meckel's diverticulum were analyzed in all of them. RESULTS: 15 children were female and 46 male (1:3). In infants the main clinical finding was rectal bleeding. Intestinal occlusion was the most common clinical expression in older children. Gastric mucosa was a common finding in the diverticulum of children with rectal bleeding in contrast to ileal mucosa in children with intestinal occlusion. 99mTc-pertechnetate scanning with previous administration of H2 blocking agent was the best diagnostic procedure. CONCLUSIONS: Meckel's diverticulum must be considered an emergency in children. Meckel's diverticulum, has to be ruled cut as in infants with significant bleeding, as well as in children with intestinal occlusion. The best method for diagnosis is 99mTc-pertechnetate scanning.

Adolescent↗