This study is testing cognitive function before and after the surgery, with patient's informed consent. Patients of interest are 65 year or older, undergoing surgery in general or regional anesthesia. Investigators are using 3 tests. These are: MMSE (Mini Mental State Exam), TEGEST test (test of gestures) and Clock drawing test. Tests after surgery are performed 2 days until discharge. The testing is anonymous, patient is assigned a number. Main aim of this study is to find a suitable quick test of cognitive function for clinical practice before surgery in general or regional anesthesia.
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Postoperative Cognitive Dysfunction - Results of MMSE Before Operation
Timeframe: 2 days before operation
Postoperative Cognitive Dysfunction - Results of MMSE After Operation
Timeframe: 3rd day after operation
Postoperative Cognitive Dysfunction - TEGEST Test Before Operation
Timeframe: 2 days before operation
Postoperative Cognitive Dysfunction - TEGEST Test After Operation
Timeframe: 3rd day after operation
Postoperative Cognitive Dysfunction -Clock Drawing Test Before Operation
Timeframe: 2 days before operation
Postoperative Cognitive Dysfunction - Clock Drawing Test After Operation
Timeframe: 3rd day after operation