Psychomotor functions and interval timing in patients receiving intravenous anesthesia for endoscopic procedures: the pilot study.

Introduction. The aim of this study was to evaluate two measures in a cognitive examination: psychomotor function and the perception of time (PT) in patients after intravenous anesthesia for endoscopic procedures. Material and Methods. We tested 23 anesthetized patients (Anesthesia Group, AG) and 17 not anesthetized patients (Control Group, CG). The Dufour Cross-Shaped Apparatus (DA) was used to assess quick reactions. Perception of time (PT) was measured for 1-, 2-, 5-, and 7-second intervals. The tests were performed before the anesthesia was administered and 1.5, 3, and 6 hours after the procedure was completed. Results. The intervals that were generated and the reproduced visual stimuli were shorter than the patterns. The reproduced 1- and 2-second auditory stimuli were longer than the patterns. The remaining reproduced auditory impulses were shorter than the patterns. Conclusions. In anesthetized patients, quick psychomotor reactions and the ability to time intervals are preserved 1.5 h and later after intravenous anesthesia for endoscopy.