[Delayed vertigo after stapedotomy with good hearing results]. / Vértigo diferido tras estapedotomía con buen resultado auditivo.

Stapedial surgery is able to obtain excellent hearing results in the long-term in most otosclerotic patients. Nevertheless, some cases have vertigo and/or tinnitus after surgery, that may lead them to revision surgery. Out of a consecutive series on 115 patients, we present three cases (2,6%) with persistent vertigo after stapedotomy. These patients had residual unsteadiness despite good hearing after surgery, with a minimum follow-up of 12 months. Videonystagmography showed spontaneous nystagmus towards the contralateral ear in one case, whereas the other two had a canalicular paresis in the operated side, signs of vestibular hypofunction. After vestibular rehabilitation, unsteadiness resolved in all cases, with good spontaneous compensation, without any further surgery.

Vértigo diferido tras estapedotomía con buen resultado auditivo / Delayed vertigo after stapedotomy with good hearing results

La cirugía del estribo consigue Buenos resultados auditivos a largo plazo en la mayoría de los pacientes con otosclerosis. Sin embargo, existen pacientes que sufren debutan cono tros síntomas como vértigo o acúfenos tras la cirugía, que pueden ser la causa de revisión. De una serie de 115 pacientes, presentamos tres casos (2,6%) de vértigo persistente en pacientes intervenidos de estapedotomía. Se trata de pacientes que padecen inestabilidad residual tras estapedotomía con buena ganancia auditiva, tras un seguimiento mínimo de doce meses. En uno de ellos, la videonistagmografía evidenciaba la presencia de nistagmo espontáneo hacia el oido no operado, mientras que en los otros dos demostraba una paresia canalicular del lado operado, todo ellos signos de hipofunción vestibular. Tras seguimiento y rehabilitación vestibular, la inestabilidad se resolvió en todos los casos, con buena compensación espontánea, sin necesidad de revisión quirúrgica. Realizamos una revisión de la fisiopatología del vértigo posoperatorio en la cirugía del estribo, especialmente en aquellos casos en los que existe ganancia auditiva

Stapedial surgery is able to obtain excellent hearing results in the long term in most otosclerotic patients. Neverthless, some cases have vertigo and/or tinnitus after surgery, that may lead them to revision surgery. Out of a consecutive series on 115 patients, we present three cases (2,6%) with persistent vertigo after stapedotomy. These patients had residual unsteadiness despite good hearing after surgery, with a minimum follow-up of 12 months. Videonystagmography showed spontaneous nystagmus towards the contralateral ear in one case, whereas the other two had a canalicular paresis in the operated side, signs of vestibular hypofunction. After vestibular rehabilitation, unsteadiness resolved in all cases, with good spontaneous compensation, without any further surgery. We review the physiopathology of postoperative vertigo alter stapedial surgery, especially in those cases with good hearing recovery

[Application of gas chromatography in the identification of Enterobacter cloacae, Enterobacter aerogenes, and Enterobacter agglomerans]. / Aplicación de la cromatografía de gases en la identificación de Enterobacter cloacae, Enterobacter aerogenes y Enterobacter agglomerans.

Enterobacter cloacae, Enterobacter aerogenes and Enterobacter agglomerans were identified using gas chromatography as a substitution of the traditional techniques. Their acid methyl esters profiles were determined using a gas chromatograph Hewlett Packard 5890A and a RSL-150 heliflex capillary column. A total of 120 samples were analyzed from reference strains (ATCC 13047, 13048, 27155) and environmental isolations, eleven fatty acids were included in the profiles from which cis-9, 10-methyleneoctadecanoic acid (peak 24), cis-9-hexadecenoic acid (peak 14), octadecanoic acid (peak 23) and dodecanoic acid (peak 3), were the most important for the differentiation of the three species analyzed.