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 2009
Combined direct current and high frequency nerve block for elimination of the onset response.
Nerve conduction in peripheral mammalian nerves can be blocked by high frequency alternating current (HFAC) waveforms. However, one of the disadvantages of HFAC block is that it produces an intense burst of firing in the nerve when the HFAC is first turned on. This is a significant obstacle to the clinical implementation of HFAC block. ⋯ This method was experimentally evaluated in an in-vivo mammalian model. Successful no-onset HFAC block was obtained using a DC block of 200 microA and an HFAC block of 30 kHz at 10 Vp-p. This may allow HFAC block to be used in clinical applications for pain relief.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Wireless application in intravenous infiltration detection system.
The IrDA wireless protocol has been applied to a fiber optics based point-of-care system for the detection of intravenous infiltration. The system is used for monitoring patients under infusion therapy. ⋯ The PDA is used for initiating the actions of the electronic module and for data transfer. Security is provided by specially designed software and hardware.
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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
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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This paper describes an accurate, economical, and portable device that helps to locate the position of an endotracheal tube (ETT) in situ. The device uses an array of magnetic field sensors to detect an anomaly in magnetic field caused by magnet embedded near the cuff of an ETT, and displays an intuitive map of relative magnetic field intensity under the sensor area. The device provides real-time feedback of the position to a clinician, so that corrective measures can be taken if the ETT is determined to be outside of normal positioning with respect to the patient's airway. Variations of the proposed design are suitable for continuous monitoring.