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Surgery Today

, Volume 35, Issue 7, pp 530–534 | Cite as

Analysis of the Factors Related to a Decrease in Jugular Venous Oxygen Saturation in Patients with Diabetes Mellitus During Normothermic Cardiopulmonary Bypass

  • Sohtaro Miyoshi
  • Toshihiro Morita
  • Yuji Kadoi
  • Fumio Goto
Article

Abstract

Purpose

We sought to examine what factors, including cerebrovascular carbon dioxide (CO2) reactivity, are related to a decrease in internal jugular venous oxygen saturation (SjvO2) during normothermic cardiopulmonary bypass (CPB) in patients with diabetes mellitus.

Methods

Twenty-three diabetic patients scheduled to undergo elective coronary artery bypass grafting were studied. As a control, 27 age-matched control patients without diabetes mellitus were also examined. After the induction of anesthesia, a fiberoptic oximetry oxygen saturation catheter was inserted into the right jugular bulb to continuously monitor SjvO2. Arterial and jugular venous blood gases were measured during CPB. The cerebrovascular CO2 reactivity was measured after the induction of anesthesia and before the start of surgery using a 2.5-MHz pulsed transcranial Doppler probe.

Results

The SjvO2 values in the diabetic group were lower than those in the control group at the initiation of CPB and at 20, 40, and 60 min after the start of CPB. The values for pre- and post-CO2 reactivity in the control group did not significantly differ (pre-CPB: 4.8% ± 2.3% mmHg−1; post-CPB: 5.9% ± 4.4% mmHg−1). In contrast, the values for CO2 reactivity were lower post CPB than pre-CPB in the diabetic group (Pre-CPB: 6.3% ± 2.9% mmHg−1; post-CPB: 4.7% ± 2.6% mmHg−1; P < 0.05). In the diabetic group, glycosylated hemoglobin A1c (HbA1c) is considered to be a factor related to a decrease in SjvO2 during CPB.

Conclusions

Cerebrovascular CO2 reactivity in diabetic patients decreased after the cessation of CPB but not in the control patients. In addition, HbA1c is also thought to be a factor related to a decrease in SjvO2 in diabetic patients.

Key words

Diabetes mellitus Jugular venous oxygen saturation Cardiac surgery Cerebrovascular carbon dioxide reactivity Glycosylated hemoglobin 

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Copyright information

© Springer-Verlag Tokyo 2005

Authors and Affiliations

  • Sohtaro Miyoshi
    • 1
  • Toshihiro Morita
    • 1
  • Yuji Kadoi
    • 2
  • Fumio Goto
    • 3
  1. 1.Department of AnesthesiologySaitama Cardiovascular and Pulmonary CenterSaitamaJapan
  2. 2.Departments of Intensive Care, Graduate School of MedicineGunma UniversityMaebashiJapan
  3. 3.Departments of Anesthesiology, Graduate School of MedicineGunma UniversityMaebashiJapan

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