Reducing delirium and cognitive dysfunction after off-pump coronary bypass: A randomized trial.

Area of Science:

• Cardiovascular Surgery
• Neuroscience
• Anesthesiology

Background:

• Neuropsychiatric complications are common after coronary revascularization surgery.
• Existing methods like off-pump coronary artery bypass (OPCAB) have not fully addressed these complications.
• This study investigates novel OPCAB modifications to mitigate these adverse effects.

Purpose of the Study:

• To evaluate the efficacy of two modified OPCAB techniques in reducing neuropsychiatric complications.
• To compare anaortic OPCAB (ANA) and OPCAB with CO2 surgical field flooding (CO2FF) against conventional OPCAB.

Main Methods:

• A single-center, randomized controlled trial involving 192 patients undergoing elective OPCAB.
• Patients were randomized into three groups: conventional OPCAB, ANA with total arterial revascularization, and OPCAB with CO2FF.
• Primary outcomes were the incidence of postoperative delirium (PD) and early postoperative cognitive dysfunction (ePOCD).

Main Results:

• The incidence of PD was significantly lower in the ANA group (12.5%) compared to conventional OPCAB (35.9%).
• The incidence of ePOCD was also significantly lower in the ANA group (9.5%) versus conventional OPCAB (34.4%).
• CO2FF did not show a significant reduction in PD or ePOCD compared to conventional OPCAB.

Conclusions:

• Anaortic OPCAB (ANA) significantly decreases the incidence of postoperative delirium and early postoperative cognitive dysfunction.
• CO2 surgical field flooding (CO2FF) did not demonstrate a significant benefit in reducing these neuropsychiatric sequelae.
• ANA may improve clinical outcomes by potentially reducing embolic load to the brain during coronary revascularization.