Descripción de la técnica de Rhoton modificada para la preparación de encéfalos en cadáveres y su práctica en el adiestramiento neuroquirúrgico en Chile

Abstract

Introduction: The advances of microsurgery and the introduction of new neurosurgical techniques make it necessary for neurosurgeons to acquire a greater knowledge of neuromicroanatomy. This can best be achieved by working on cadaveric specimens in the laboratory. Its study is made more meaningful with a good technique of cadaveric preservation that allows biological tissues to be maintained for a longer period of time, with a good tissue consistency and with the injec-tion of a colored silicone mixture that allows to clearly distinguish between venous and arterial structures, simulating in a better way the condition of reality. Material and Method: A mixture of a preservative solution composed of phenol, ethyl alcohol and formalin was used to preserve the cadaveric heads. After a period of three weeks, the venous system was injected with a blue silicone mixture and the arterial system with a red one. This process is described in a step-by-step format. Results: A total of three heads and an upper limb have been prepared since 2014 with the described technique with satisfactory results. Their results are shown with the use of photographic material. Different variables involved in obtaining a good injection process are also mentioned. Conclusions: The cadaveric preparation as the one described is a laborious work, but allows obtaining good quality anatomical preparations. The specimens can be used for a long period of time and it allows a clear distinction between venous and arterial structures