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Biomedical subjects

G Téllez

Publications and source records attributed to G Téllez.

36 records · Page 2Linked to original sources
PubMed1979

[Vascular approach for periodic hemodialysis. Clinical course of 100 internal arteriovenous fistulas (author's transl)].

The clinical course of 100 internal arteriovenous fistulas in patients observed over a period of more than 6 months was analyzed. Ninety-six were practiced in the upper extremities as side-to-side anastomoses in the forearm between the radial artery and the nearest vein; three were constructed in the lower limbs as anastomoses between the femoral artery and the internal saphenous vein; and one was an autograft of the saphenous vein in the forearm. The most important complications observed were thrombosis (arising chiefly from scant venous development, surgical procedures, and episodes of arterial hypotension), distal ischemia, distal venous flow, infection of the fistula, and insufficient flow. A blood flow over 350 ml/min was achieved in all except two patients. The actuarial survival of individuals with arteriovenous fistulas is high at the present time, with 86 percent of the fistulas functioning after 3 years. The longest period of satisfactory arteriovenous fistula function is 8 years and 3 months.

Acute Kidney Injury↗
PubMedDate not supplied

Experimental heterotopic heart transplantation: an easier technique.

AIM: The use of heterotopic heart transplantation (HHT) in experimental surgery is an extended method to evaluate cardiac graft viability. To study endothelial injury after ischemia-reperfusion, the technique described by Matsui et al. in 1988 for HHT was chosen. A modification, which consists of replacing the atrium-to-atrium anastomosis for the tip of a 30-Fr venous cannula, was developed with the purpose of using this technique in small pigs. Both techniques were compared. METHODS: Twenty-seven consecutive HHTs in 17- to 20-kg pigs using Matsui's original technique and the modified technique were performed. Ischemia time, bleeding volume, mean gradient and anastomosis complications were measured to compare both techniques. RESULTS: Statistically significant decreases in ischemia time, bleeding volume and mean gradient with the modified technique were found. Furthermore, there were two cases of suture dehiscence with the original technique. CONCLUSIONS: The replacement of the atrium-to-atrium anastomosis for the venous cannula is a modification that statistically decreases the ischemia time, blood loss and avoids suture complications. This modification makes Matsui's technique easier, faster and safer in small pigs and it may be used in bigger animals and in any kind of non-permanent anastomosis.

Animals↗
PubMedDate not supplied

Characterization of Mexican strains of avian infectious bronchitis isolated during 1997.

Ten infectious bronchitis virus (IBV) isolates were recovered from broiler chickens in the states of Queretaro and Guanajuato in Mexico. The viruses were isolated from trachea, lung, kidney, and cecal tonsils of birds that showed respiratory signs in spite of vaccination with Massachusetts (Mass) and Connecticut strains of IBV. Each isolate was identified by an accession number from 1 to 10. Six of the isolates were neutralized by Mass monoclonal antibodies, whereas the other four were not. In addition, these four isolates did not produce lesions in embryos in the first five to seven passes. These four isolates were further characterized by the reverse transcriptase-polymerase chain reaction and restriction fragment length polymorphism techniques. The electrophoretic patterns for the four isolates were identical but were different from other known IBV isolates.

Animals↗
PubMedDate not supplied

Serotyping of Haemophilus paragallinarum isolates from Mexico by the Kume hemagglutinin scheme.

A total of 42 isolates of Haemophilus paragallinarum from Mexico were serotyped by the Kume hemagglutinin scheme. Serovars A-1, A-2, B-1, and C-2 were recognized among 11 (26.2%), 7 (16.6%), 4 (9.5%), and 14 (33.3%) isolates, respectively. A further six isolates (14.3%) showed hemagglutinating activity but could not be classified into any serovar. Commercial vaccines containing Kume serovars A-1, A-2, B-1, and C-2 may provide better protection than those bi- or trivalent infectious coryza vaccines currently used in Mexico.

Animals↗
PubMedDate not supplied

[Open mitral commissurotomy. Indications and results].

We have reviewed the clinical history of 106 patients that were done an open mitral commissurotomy from june 1971 to march 1974. Hospital mortality was less than 1% and morbility was low. The patients average age was 40 years. Fifteen patients had suffered a previous closed mitral commissurotomy, and systemic embolism occurred in 62.2% of them. Ninety eight of the surviving patients have been followed; 80.6% of them had improved by at least one degree of the N.Y.H.A. functional scale. According to these results we have widened the indications for open mitral commissurotomy. However, we still use the closed technique in young patients without previous mitrol commissurotomy or past history of system embolism, which no fluoroscopic evidence of mitral valve calcifications and without associated valvular lesions.

Adult↗
PubMedDate not supplied

Heart transplantation in a patient with liver hydatidosis.

The human can serve as an accidental intermediate host to Echinococcus granulosus, a parasite that targets dogs as its definitive hosts. We present the case of a 27-year-old man with liver hydatidosis, who underwent heart transplantation because of ischemic cardiomyopathy. The immunosuppressor treatment had no effect on the size of the cysts, which were removed surgically 14 months after heart transplantation; good results persist after 3 years of follow-up.

Adult↗