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Related Experiment Videos

Decrease in jugular venous oxygen saturation during normothermic cardiopulmonary bypass predicts short-term

Y Kadoi1, S Saito, F Goto

  • 1Department of Anesthesiology and Reanimatology, Gunma University, School of Medicine, Gunma, Japan. kadoi@med.gunma-u.ac.jp

Journal of the American College of Cardiology
|November 3, 2001
PubMed
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Reduced jugular venous oxygen saturation (SjvO(2)) during cardiopulmonary bypass (CPB) predicts short-term cognitive dysfunction in elderly patients. This finding highlights the importance of monitoring cerebral oxygenation during cardiac surgery.

Area of Science:

  • Cardiology
  • Neurology
  • Anesthesiology

Background:

  • Elderly patients are more vulnerable to hypoperfusion during cardiopulmonary bypass (CPB).
  • Cognitive dysfunction post-CPB is a concern, particularly in older individuals.

Purpose of the Study:

  • To investigate if decreased jugular venous oxygen saturation (SjvO(2)) during CPB can predict cognitive disorders in elderly patients.
  • To assess the relationship between SjvO(2) and both short-term and long-term cognitive outcomes.

Main Methods:

  • 185 patients undergoing coronary artery bypass graft surgery were divided into three age groups: young (<50), middle-aged (50-69), and elderly (>70).
  • Jugular venous oxygen saturation (SjvO(2)) was continuously monitored using fiberoptic oximetry.
  • Hemodynamic variables and blood gases were measured at multiple time points during surgery.

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Main Results:

  • Elderly patients (group 3) exhibited significantly longer cerebral desaturation times (SjvO(2) <50%) compared to younger groups (34 +/- 9 min vs. 20-19 min).
  • Increased age and longer desaturation time were identified as perioperative predictors of short-term cognitive impairment.
  • Neither age nor desaturation time predicted long-term cognitive impairment.

Conclusions:

  • Reduced SjvO(2) during CPB is associated with short-term cognitive dysfunction in elderly patients.
  • Cerebral desaturation monitoring may aid in identifying elderly patients at risk for immediate postoperative cognitive issues.