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Int. j. morphol ; 24(4): 689-690, Dec. 2006. ilus
Article in English | LILACS | ID: lil-626863

ABSTRACT

During routine dissection in the Department of Anatomy following anatomical variations of phrenic nerve were observed on right side in the neck region of a middle aged cadaver. The phrenic nerve in its early course close to its origin was giving a communicating branch to C5 root of brachial plexus and at the level of the root of neck just before entering the thorax, the phrenic nerve was placed anterior to the subclavian vein. This unique case of phrenic nerve variation gains tremendous importance in context of subclavian vein cannulation, implanted venous access portals, and supraclavicular nerve block for regional anesthesia.


Durante una disección de rutina en el Departamento de Anatomía, observamos una variación anatómica del nervio frénico en el lado derecho del cuello de un cadáver de mediana edad. El nervio frénico cercano próximo a su origen dio un ramo comunicante para la raíz C5 del plexo braquial. A nivel de la raíz del cuello, justo antes de entrar al tórax, el nervio frénico se colocaba anterior a la vena subclavia. Este caso único de variación del nervio frénico adquiere una gran importancia en caso de canulación de la vena subclavia, implantes venosos accesos portales, y bloqueo del nervio supraclavicular por anestesia regional.


Subject(s)
Humans , Male , Middle Aged , Phrenic Nerve/anatomy & histology , Anatomic Variation , Neck/innervation , Cadaver
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