jugular venous oxygen saturation (SjVO2)

Q: Normal jugular venous oxygen saturation (SjVO2) in patients with Traumatic Brain Injury (TBI) is considered to be approximately at 

A) 80%
B) 70%
C) 60%
D 50%
E) 40%


Answer: C

Jugular venous oximetry is an advanced neuromonitoring technique in TBI patients and it can be obtained with retrograde cannulation of the internal jugular vein. It reflects well with the measurement of oxygen saturation in the blood exiting the brain. Normal  SjVO2 is considered to be approximately at 60 percent. SjVO2 less than 50 percent for mere 10 minutes is considered as an "ischemic desaturation", impaired cerebral perfusion pressure (CPP) and poor outcome.

#Trauma
#neurosurgery


References:

1. Cruz J. The first decade of continuous monitoring of jugular bulb oxyhemoglobinsaturation: management strategies and clinical outcome. Crit Care Med 1998; 26:344. 

2. Brain Trauma Foundation, American Association of Neurological Surgeons, Congress of Neurological Surgeons, et al. Guidelines for the management of severe traumatic brain injury. X. Brain oxygen monitoring and thresholds. J Neurotrauma 2007; 24 Suppl 1:S65.