Anatomical landmark for internal jugular vein catheterization for detection of jugular venous O2 saturation (SjvO2) in Thai people.

Thirty-two (32) cadavers were dissected to find the anatomical landmark for puncturing the internal jugular vein. The point for the right internal jugular vein was 2 cm above and 2.17 cm lateral to the right clavicular head, and that for the left internal jugular vein was 2 cm above and 2.08 cm lateral to the left clavicular head. The right internal jugular vein was found to dominate eighty-eight per cent (88%) of the cadavers. The anatomical point 2 cm above and 2 cm lateral to the head of the clavicle was appropriate for puncturing the internal jugular vein. After puncturing the internal jugular vein, a catheter was inserted ascending to the jugular bulb where jugular venous O2 saturation (Sjv O2) related to the cerebral metabolism was detected.