Pseudoaneurisma de arteria femoral asociado a fístula arteriovenosa producido por tornillo de bloqueo distal / Femoral artery pseudoaneurysm associated with arteriovenous fistula caused by distal locking screw Abstract

Femoral artery pseudoaneurysm associated with arteriovenous fistula is a complication of endovascular interventional procedures. However, no cases have been described in which both lesions occur as the result of trauma surgery and specifically that they are side effects to the placement of a gamma nail in the femur with a distal locking screw. We describe the case of a patient who presented femoral artery pseudoaneurysm concomitant with arteriovenous fistula, in which there were no suspicious clinical signs. The diagnosis was established using computed tomography, confirmed by arteriography and treated with the placement of metallic coils.

El pseudoaneurisma de arteria femoral asociado a fístula arteriovenosa es una complicación de los procedimientos intervencionistas endovasculares. Sin embargo, no se han descrito casos en los que ambas lesiones se produzcan como consecuencia de cirugía traumatológica y, en concreto, que sean secundarias a la colocación de clavo gamma en fémur con tornillo de bloqueo distal. Se describe el caso de una paciente que presentó pseudoaneurisma de arteria femoral concomitante con fístula arteriovenosa, en la que no existieron signos clínicos de sospecha. El diagnóstico se estableció mediante tomografía computarizada, se confirmó con arteriografía y se trató mediante la colocación de coils metálicos.

Protamines and other basic proteins from spermatozoa of molluscs.

The basic proteins obtained from spermatozoa of different species of the phylum Mollusca have been extracted and fractionated. The amino acid analysis and electrophoretic mobility of these proteins show a considerable variation in the types and relative amounts of the components present in different species. In some case-(Gibbula, Haliotis, Loligo, Octopus) the main components are similar to the protamines found in the salmonid fishes, although they appear to be larger in size (40-80 amino acids) and show significant differences in amino acid composition. In other cases (Mytilus, Chiton) a complex mixture of proteins is present, which including somatic-like histones and proteins intermediate in size and composition betweeln protamines and histones. Other molluscs (Ostrea, Spisula, Patella) also contain proteins intermediate in composition between protamines and histones, but their molecular weight appears to be larger than in histones. In Eledone a complex mixture of proteins containing cystine is obtained, with some components rich in arginine. In most species, somatic-like histones are also present. Their type and relative amount are different in each species. The significance of these results towards an understanding of the evolutionary history of these proteins is discussed. It is suggested that these proteins evolved from histone precursors.