. Regional anesthesia : its technic and clinical application . —Cervical plexus block by the posterior route. Cross-section of the neckat the level of the third cervical vertebra, showing the direction of the needle (o) insertedat a point 2 cm. from the midline of the back of the neck. Note the thickness of thetissues traversed in order to reach the vicinity of the cervical nerve. transverse processes, although deeply situated in some patients, canalways be felt by palpation, and their general direction traced on theskin with great accuracy. In certain patients the tip of the mastoidprocess an
. Regional anesthesia : its technic and clinical application . —Cervical plexus block by the posterior route. Cross-section of the neckat the level of the third cervical vertebra, showing the direction of the needle (o) insertedat a point 2 cm. from the midline of the back of the neck. Note the thickness of thetissues traversed in order to reach the vicinity of the cervical nerve. transverse processes, although deeply situated in some patients, canalways be felt by palpation, and their general direction traced on theskin with great accuracy. In certain patients the tip of the mastoidprocess and anterior tubercle of the sixth transverse process (tubercle ofChassaignac) are the chief landmarks, the line joining these pointsrepresenting the general direction of the transverse processes of the cer- BLOCKING OF SPINAL NERVES 17s vical vertebras. In stout patients the sternocleidomastoid muscle, theexternal jugular vein, and the thyroid cartilage are rehable are two procedures used for blocking the cervical plexus bythe lateral route:. Ext. jugVLla- Fig. —Cervical plexus block by the lateral route: 1 is one fingerbreadth belowthe tip of the mastoid process; 2 marks the tubercle of Chassaignac (sixth transverseprocess); 3 is opposite the superior cornu of the thyroid cartilage. Injections are madethrough 1 and 3 only. 1. With the patient lying on his back, head tilted on the oppositeside, the tip of the mastoid process and the tubercle of Chassaignac,easily palpable in the majority of cases, are joined by a straight linemade with a sterile dermographic pencil or an applicator moistenedwith tincture of iodin. The upper margin of the thyroid cartilage is :76 REGIONAL ANESTHESIA produced backward to cut this line. On the line joining the tip of themastoid process to the tubercle of Chassaignac three wheals are raised:the first, one fingerbreadth below the tip of the mastoid process, isordinarily at the level of the angle of the jaw; the second, over t
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Keywords: ., bookcentury1900, bookdecade1920, bookidregionalanes, bookyear1922
