[A new multidirectional sigmoid sinus retractor]. / Nouveau rétracteur du sinus sigmoïde à grande variabilité de positionnement.

Retraction of the sigmoid sinus requires a strong instrument. The instruments currently available allow only a limited degree of freedom due to their lack of mobility and versatility. A new sigmoid sinus retractor (MICRO-FRANCE/INSTRUMENTARIUM) was constructed to facilitate the surgeon's task by offering the following advantages: Three-dimensional mobility of the blade: lateral, rotatory and longitudinal, Safe positioning of the retractor by three sets of sharp teeth, Fixation of blade by a single screw, Strong retraction without giving-way.