Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Comparative StudyEvaluation tests for eye tracking systems.
In this paper, we describe the tests developed by our research team to evaluate the performance of eye tracking algorithms to quantify vertical and horizontal eye movements. To perform the tests, we created a special library to generate synthetic eye images, where we can control most characteristics of the eyes. It is possible to simulate the different situations observed during the acquisition of eye images of a real subject.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Usefulness of monitoring congestive heart failure by multiple impedance vectors.
We investigated trends in intrathoracic impedance measured between multiple implanted electrodes for monitoring pulmonary edema secondary to congestive heart failure (CHF) in an experimental model. ⋯ All impedance vectors decreased during CHF. Impedance measurement employing left heart sensors correlated well wit- - h LA pressure, and may improve detection of CHF onset compared to sensing by RA or RV leads alone. This approach has important clinical implications for managing heart failure patients in the ambulatory setting.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Clinical TrialValidation of the Index of Consciousness (IoC) during sedation/analgesia for ultrasonographic endoscopy.
The level of consciousness of patients undergoing surgery evolves continuously as the effect of the anesthetic agents is counteracted by the surgical stimuli. The monitors of depth of anesthesia, based on the analysis of the electroencephalogram (EEG), have been progressively introduced into the daily practice to provide additional information about the state of the patient. ⋯ A good correlation is found between both indexes. Furthermore, IoC presents a significantly higher prediction probability Pk of the level of sedation than BIS, and can thus be considered as an interesting measure of the level of consciousness.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Automation in anesthesia: computer controlled propofol infusion and data acquisition.
This work presents the improvement of a software for a clinical setup, the Anesthesia Synchronization Software (ASYS). The first version presented the data acquisition from cerebral monitors and a partial control with Target Controlled Infusion (TCI) system. Based on pharmacokinetic models, the effect-site and plasma concentrations can be related with the drug dose infused and vice versa. This later version comes with the implementation of the hemodynamic monitor always present in operating rooms and with the full TCI system developed to determine the infusion rates of the drug which are given as commands to the infusion pumps.