Elección del material de sutura idóneo en microcirugía tubárica. Estudio experimental / Selection of the ideal suture material in microsurgery. An experimental study

El presente trabajo experimental se ha realizado para establecer qué material de sutura es el más adecuado en la microcirugía tubárica, y según los resultados obtenidos establecer la validez actual de esta técnica frente a la fertilización in vitro. Se han intervenido 30 conejos de la raza New Zealand, estableciendo tres grupos de 15 trompas cada uno, con un total de 45 reanastomosis tubáricas. Las restantes 15 trompas no se intervinieron, quedando como control. El material de sutura utilizado en cada grupo ha sido poliglactin 910, nailon y polidioxanona. Hemos obtenido con la polidioxanona mejores resultados respecto a la permeabilidad tubárica, menos estenosis y adherencias respecto a los otros dos tipos de suturas, con diferencias estadísticamente significativas frente al nailon (p < 0,05), que ha producido las mayores adherencias, que supera el doble de los otros dos grupos, y granulomas de cuerpo extraño. Tanto en el estudio macroscópico como en el histológico se demuestra que las mejores suturas son las reabsorbibles frente al nailon (p < 0,05), y dentro de las reabsorbibles, los monofilamentos como la polidioxanona, y hemos de descartar el uso del nailon por su potencial adherenciógeno (AU)

[Microbiological aspects of nosocomial risks of suction bottles]. / Aspects microbiologiques des risques nosocomiaux des flacons d'aspiration.

The suction and collection of more or less contaminated biological fluids or regurgitated matter in reusable glass bottles may be responsible for nosocomial infections. Based on a study conducted in 49 cases, the authors try to demonstrate the microbiological risks in the operating theatre of changing and transport of these bottles and the risks for the environment and the hospital staff in the cleaning of these bottles. The connection to the vacuum system was found to be contaminated in 26.1% of cases, the environment of the waste evacuation and cleaning zone was contaminated in 59.2% of cases and, in 28.6% of cases, the microorganism detected was identical to that in the bottle. All of these factors suggest that a disposable system, although apparently more expensive, ensures a greater degree of safety, avoiding the problems related to transport emptying and elimination of these bottles.

Bacterio-pharmacological activity of Saccharomyces boulardii in clindamycin-induced colitis in the hamster.

The effect of S. boulardii on experimental colitis induced by the single oral administration of 1 mg/kg of clindamycin in the Syrian hamster was studied. Oral administration of S. boulardii for 13 days, starting 3 days prior to the administration of clindamycin, significantly reduced the mortality rate and inhibited the growth of C. difficile in the caecum and colon. There was a marked improvement in the sub-mucosa and mucosa which showed major inflammatory lesions when clindamycin was administered alone.

Effet de phase dans la dispersion de la puissance lumineuse des fibres optiques unimodales.

Pulse broadening calculations in monomode fibers do not include till now the phase variation of the coherent input field. Although it is correct to ignore this variation at wavelengths different from the zero material dispersion wavelength lambda(o), this effect must be taken into account for wavelengths nearly equal to lambda(o). We have found for silica-type fibers that if the relative source linewidth (Deltalambda(o))/lambdao is less than 10(-3), the phase effect largely dominates over important distances in the evaluation of the pulse broadening giving rise to a decrease of the r.m.s. output pulse width. Therefore, this effect must be relevant for the estimation of the maximum information capacity on monomode fibers.

Diamètre intrinsèque d'une fibre non gainée de forme quelconque: définition et détermination numérique.

In this paper, the intrinsic diameter of the noncircular cross section of an unclad optical fiber is defined and determines the fiber dimension. Its value can be determined by studying the forwardscattering pattern from the fiber illuminated by a laser beam perpendicular to its axis. A knowledge of the shape of the fiber is not necessary. The suggested method is nondestructive. Moreover, it provides an estimate of the deformation of the fiber cross section.

Détermination de défauts de circularité de la section d'une fibre optique non gainée.

Study of the light scattered from an unclad optical fiber illuminated by a laser beam perpendicular to its axis gives a valuation of little defects of the fiber cross section. The shifts of some bright fringes that occur when the fiber is rotated are observed. Comparison between experimental measurements and ray interference computations shows that the cross section of the fiber under test is neither circular nor elliptical, but can be described with good approximation by a limited Fourier series, the coefficients of which are estimated.