Predictive Efficacy of Ratio of Median Frequency to Spectral Edge Frequency Used in the Depth of Anaesthesia Monitoring on Post-operative Cognitive Functions

Overview

The primary objective of this observational study is to evaluate the effectiveness of preoperative anaesthesia depth monitoring parameters in predicting postoperative cognitive functions in non-cardiac adult patients. Participants will preoperatively perform cognitive tests such as the Nursing Delirium Screening Scale(Nu-DESC) and 4 'A's Test(4AT) to assess baseline cognitive performance. The same tests will be repeated twice daily until the postoperative 3rd day or discharge.

The primary objective of this observational study is to evaluate the effectiveness of preoperative anaesthesia depth monitoring parameters such as Bispectral Index(BIS), Spectral edge frequency(SEF) and Median frequency(MF) in predicting postoperative cognitive functions in non-cardiac adult patients. Participants will preoperatively perform cognitive tests such as the Nursing Delirium Screening Scale(Nu-DESC) and 4 'A's Test(4AT) to assess baseline cognitive performance. Intraoperative haemodynamic and BIS parameters will be collected via manual data entry into printed forms. Also, a two-channel electroencephalogram(EEG) and BIS parameters(BIS Number, SEF, MF) will be collected digitally. The cognitive tests will be repeated twice daily until the postoperative 3rd day or discharge. Parameters such as mean intraoperative MF value and the ratio of MF over SEF will be compared against postoperative cognitive test scores.

Conditions

Eligibility