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El presente trabajo se desarrolla como parte de un proyecto de investigación que tiene lugar en la Universidad de Sancti Spíritus “José Martí Pérez” que involucra a los departamentos de Física-Matemática e Ingeniería Informática. Tiene como objetivo desarrollar un Sistema Experto para apoyar el autoaprendizaje de los estudiantes de Ingeniería Informática sobre el tema combinación lineal de vectores. Para ello se emplea la metodología propuesta por el Dr. Mateo Lezcano Brito en su libro “Prolog y los Sistemas Expertos”. Como resultado se obtiene Sistema Experto sobre Combinación Lineal (SECLA), una aplicación que apoya a los estudiantes en su autoaprendizaje sobre el tema combinación lineal de vectores

Lymphangiomatosis is a rare syndrome that can affect different organs, although simultaneous splenic and adrenal involvement is exceptional. We report the case of a young female with a symptomatic massive splenomegaly and no-nhypersecreating bilateral adrenal masses incidentally discovered that represented a diagnostic challenge. The management of adrenal incidentalomas is controversial, as the presence of large sized bilateral masses are highly indicative of malignancy. Despite the different diagnostic techniques available, it is sometimes impossible to reach an accurate preoperative diagnosis. Elective splenectomy and left adrenalectomy were performed, preserving the functioning of the right adrenal gland, radiologically similar to the left one, to prevent the development of definitive adrenal insufficiency. Postoperative evolution has been favourable without initial increase of the size of the right adrenal lesion. However, the persistence of this mass obligated long-term follow-up and shall assist us in better understanding the behavior of this bening lesion.

Aim: To evaluate the clinical course, diagnostic approach, therapeutic measures and results, in a series of 13 patients with colonic bleeding diverticula., Material and Methods: From 1973 to 1995, 72 patients were admitted with the diagnosis of lower gastroin testinal bleeding. Thirteen presented a colonic diverticula bleeding. Mean age was 65.2 years. Medical history, symptoms, diagnosis, treatment (conservative or surgical) and pathology were recorded., Results: Main bleeding time was 3 days. Eight patients needed blood transfusion. All patients underwent colonoscopic examination and it was diagnostic in every patient. Four patients underwent surgery: one case, because of massive hemorrhage and the other three cases due to bleeding recurrence. Pancolectomy was performed in one patient, ileal resection in another and the other two were treated with a sigmoidectomy and a left hemicolectomy. Pathology analysis corroborated colonic diverticula diagnosis. There was no postoperative mortality. Bleeding recurrence did not occur either in postoperative period or in the follow-up., Conclusions: Colonic diverticular bleeding usually stops spontaneously, obtaining high rates of preoperative diagnosis with colonoscopy. Less than a third of the cases requires surgical resection.

Objective: Donors age 50 years was an exclusion criteria in past decades. The increase of patients in the waiting list has determined the acceptance of older donors (over 65 years old). We analyze our results in liver transplantation using donors over 65 years., Patients: From 1986 to may 1994, we performed 381 OLT. In five cases (1.3%) the OLT was performed using donors over 65 years of age (66, 67, 68, 70 and 71). The selection criteria for donors and recipients were similar to the other transplanted patients. Immunosuppression included cyclosporine or FK-506, prednisone and azathioprine., Results: There were no primary graft failures and preservation damage, biochemical and clinical evolution were not different to the procedures using younger donors. Three grafts presented non-corticoresistant acute rejection. After a follow-up of 11.6 mo (range 4-37 mo) only one graft was lost (Kaposi's sarcoma in the liver). Four grafts and four patients are in excellent biochemical and clinical condition., Conclusions: Donor age should not be an exclusion criteria. Grafts from older donors (over 65 years old) may be considered safe and will permit to increase the number of OLT.