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Biomedical subjects

S Morales Méndez

Publications and source records attributed to S Morales Méndez.

7 recordsLinked to original sources
PubMed2001

International scientific production in digestive laparoscopic surgery.

OBJECTIVE: To obtain data on research in laparoscopic digestive surgery over the period of 1991 to 1996. MATERIAL AND METHODS: We used Medline and the Science Citation Index to obtain general data on production. For more specific data (contents, etc.) we used random samples with a confidence level of 99%. RESULTS: There were 4825 publications on laparoscopic digestive surgery and 4.085 on other specialties; of these, articles represented 85% and editorials and letters 15%. University hospitals published 40% of this production. The producing countries were USA (45%), France (8.2%), United Kingdom (7.9%) and Germany (7.5%). The publishing countries were USA (41%), Germany (15.3%), United Kingdom (9.7%) and France (6.7%). The publication with the largest influence was the New England Journal of Medicine with a total Impact Factor of 589; the British Journal of Surgery with a factor of 436, Archives of Surgery with 343, American Journal of Surgery with 336 and Annals of Surgery with 302; the mean relative Impact Factor was 1.886. Method was involved in 756 retrospective studies, 275 prospective studies and 43 random clinical trials; the rest were not series. The majority of contents are on techniques and instruments, indications and general reflections. The most researched anatomical region was the gall bladder, followed by the bile ducts and the colon. The differences had a "z" > 1.645, that is to say, p < 0.05, and so considered statistically significant. CONCLUSIONS: The largest production and publication takes place in the USA and the journal with the greatest influence is the New England. Important studies on method are extremely scarce, random clinical trials representing only 1%.

Bibliometrics↗
PubMed1989

[Dieulafoy's vascular disease].

Four cases are reported of upper gastrointestinal hemorrhage caused by Dieulafoy's vascular disease treated in our service over the last 15 years. In all these patients bleeding was from an unusually long artery with a tortuous trajectory through the gastric submucosa that eroded the mucosa and caused blood loss. In 75% of the cases it was located 6 cm below the gastroesophageal junction, near the small curvature. The diagnosis is usually made by endoscopy or during emergency gastrostomy. The most effective therapeutic measure is surgical resection.

Adult↗
PubMedDate not supplied

Portal hypertensive colopathy: histologic appearance of the colonic mucosa.

BACKGROUND/AIMS: The aim of this study was to evaluate macroscopic and histologic disorders of the colon in rats with portal hypertension. METHODOLOGY: The animals were divided into two groups: 10 rats in the experimental group and 10 controls. Portal hypertension was induced by a partial ligation of the portal vein. We assessed the histologic appearance and macroscopic alterations of the colonic mucosa 12 weeks after the induction of portal hypertension. RESULTS: The macroscopic results showed the presence of the typical signs of portal hypertension, with dilatation and tortuosity of the mesenteric veins and hyperemia of the rectum and colon. Histologic study revealed a marked dilatation in the microcirculation at the level of the ascending colon (20 +/- 2 micra in diameter) and rectum (30 +/- 4), with a tendency to group the lesions. Submucosal edema without inflammatory signs was observed. CONCLUSION: The existence of these lesions in the colon and rectum can be the cause of hemorrhage, as in the gastropathy of portal hypertension and should be considered in cases of undiagnosed hemorrhage in patients with portal hypertension.

Animals↗