Changes of Internal Jugular Venous Oxygen Content with Differences in Arterial CO2 Tension.

Lim,  Jung Hak; Shin,  Chee Mahn; Park,  Joo Yeul

doi:1988.21.3.493

Clinical Research Article

Korean Journal of Anesthesiology 1988;21(3):493-496.
DOI: https://doi.org/10.4097/kjae.1988.21.3.493

Changes of Internal Jugular Venous Oxygen Content with Differences in Arterial CO2 Tension.

Jung Hak Lim, Chee Mahn Shin, Joo Yeul Park

Department of Anesthesiology, Inje Medical College, Pusan, Korea.

Abstract

The routine management of head injury includes hyperventilation to produce hypocapnis with arterial CO2 tension 25~30 torr. But a decrease in cerebral blood flow with hypocapnia may result in cerebral ischemia. Our study was to evaluate the change of cerebral blood flow during hyperventilation in halthane anesthesia. The jugular venous oxygen saturation(SjvO2), arterio-venous oxygen content difference(CaO2-CjvO2), and oxygen extraction ratio(O2ER) were used as criteria of cerebral ischemia with reduced cerebral blood flow. The results are as follows: 1) SjvO2 was lower in group 2(PaCO2=22.8torr) than group 1(PaCO2=30.3 torr). 2) CaO2-CjvO2 and O2ER were higher in Group 2 than group 1. 3) No more increased possibility of cerebral ischemia with reduced cerebral blood flow was observed Group 2 than group 1.

Key Words: SjvO2; CaO2-CjvO2; Cerebral ischemia