TY - JOUR
T1 - Jugular venous bulb oxyhemoglobin saturation during cardiac surgery
T2 - Accuracy and reliability using a continuous monitor
AU - Trubiano, Paolo
AU - Heyer, Eric J.
AU - Adams, David C.
AU - McMahon, Donald J.
AU - Christiansen, Ingrid
AU - Rose, Eric A.
AU - Delphin, Ellise
PY - 1996
Y1 - 1996
N2 - Previous studies have demonstrated the feasibility of continuously monitoring jugular venous oxygen saturation (SjO2) with a fiberoptic catheter during hypothermic cardiopulmonary bypass (CPB). In the present study, with patients maintained at either moderate (28°C) or mild (32- 34°C) hypothermia during CPB, SjO2 values obtained from a fiberoptic catheter were compared to intermittent samples analyzed by a co-oximeter. Twenty patients scheduled for elective coronary artery or valvular surgery had a 5.5 Fr Opticath catheter inserted into the left internal jugular bulb after induction of general anesthesia. The catheter was calibrated in vitro and in vivo according to the manufacturer's specifications. Catheter and co- oximetry SjO2 values obtained at four time points-1) pre-CPB, 2) target CPB temperature, 3) mid-rewarming, and 4) post-CPB-were compared using linear regression, Bland-Altman analysis, and Shrout-Fleiss interclass correlation coefficient analysis. These statistical methods revealed poor correlation between the catheter and co-oximetry SjO2 values: r = 0.44 by linear regression and 0.32 by interclass correlation coefficient analysis, and was unacceptably discrepant by Bland-Altman analysis. Oxyhemoglobin saturation values obtained continuously from a jugular venous bulb fiberoptic catheter during CPB may not accurately reflect true oxyhemoglobin saturation, and caution is warranted when interpreting SjO2 values obtained from a fiberoptic catheter during CPB.
AB - Previous studies have demonstrated the feasibility of continuously monitoring jugular venous oxygen saturation (SjO2) with a fiberoptic catheter during hypothermic cardiopulmonary bypass (CPB). In the present study, with patients maintained at either moderate (28°C) or mild (32- 34°C) hypothermia during CPB, SjO2 values obtained from a fiberoptic catheter were compared to intermittent samples analyzed by a co-oximeter. Twenty patients scheduled for elective coronary artery or valvular surgery had a 5.5 Fr Opticath catheter inserted into the left internal jugular bulb after induction of general anesthesia. The catheter was calibrated in vitro and in vivo according to the manufacturer's specifications. Catheter and co- oximetry SjO2 values obtained at four time points-1) pre-CPB, 2) target CPB temperature, 3) mid-rewarming, and 4) post-CPB-were compared using linear regression, Bland-Altman analysis, and Shrout-Fleiss interclass correlation coefficient analysis. These statistical methods revealed poor correlation between the catheter and co-oximetry SjO2 values: r = 0.44 by linear regression and 0.32 by interclass correlation coefficient analysis, and was unacceptably discrepant by Bland-Altman analysis. Oxyhemoglobin saturation values obtained continuously from a jugular venous bulb fiberoptic catheter during CPB may not accurately reflect true oxyhemoglobin saturation, and caution is warranted when interpreting SjO2 values obtained from a fiberoptic catheter during CPB.
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U2 - 10.1097/00000539-199605000-00013
DO - 10.1097/00000539-199605000-00013
M3 - Article
C2 - 8610907
AN - SCOPUS:0029925522
SN - 0003-2999
VL - 82
SP - 964
EP - 968
JO - Anesthesia and analgesia
JF - Anesthesia and analgesia
IS - 5
ER -