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 2007
Comparative StudyA comparative evaluation between conditions of the wrist band capacitively-coupled ECG recording through signal-to-noise ratio.
The purpose of this study is to evaluate the performance to measure ECG recording based on signal-to-noise ratio of ECG signals recorded with three types of electrodes in four experimental conditions for discussion on appropriate form of the electrodes. The wrist band shaped capacitively-coupled electrodes have been developed. We evaluated the signal-to-noise ratios with statistical methods when the reference and the properties of the electrodes were substituted. From our results, it is indicated that not only performance of the electrodes themselves but also stabilization of electrodes around skin are important for steady ECG recording.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2007
Diagnosis of hemorrhage in a prehospital trauma population using linear and nonlinear multiparameter analysis of vital signs.
In this study, we analyzed a dataset of time-series vital-signs data collected by standard Propaq travel monitor during helicopter transport of 898 civilian trauma casualties from the scene of injury to a receiving trauma center. The goals of the analysis are two fold. First, to determine which combination of the automatically-collected and -qualified vital signs provides the best discrimination between casualties with and without major hemorrhage. ⋯ We randomly selected a subset of the casualties to train and test the classifiers with multiple combinations of the vital-signs variables, and used the area under the receiver operating characteristic curve (ROC AUC) as a decision metric. Based on the results of 100 simulations, we observe that: (i) the best two features obtained are systolic blood pressure and heart rate (mean AUC = 0.75 from a linear classifier), and (ii) the use of nonlinear classifiers does not improve discrimination. These results support earlier findings that the interaction of systolic blood pressure and heart rate is useful for the identification of trauma hemorrhage and that linear classifiers are adequate for many real-world applications.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2007
A simple and efficient algorithm with a coarse to fine approach for arterial beat pulse detection.
This paper presents a simple algorithm for arterial beat pulse detection. It consists in a coarse to fine approach : the first step is performed with a lifting Haar wavelet transform with thresholding and provides search intervals, the second step is to localize the beat pulse in the original signal within these areas. Thanks to online available database, the performance of this algorithm can be compared to others and its ability to detect peaks is sufficient considering its low amount of calculation.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2007
Effect of the needle tip height on the puncture force in a simplified epidural anesthesia simulator.
The purpose of the research is to create a safer needle used for epidural anesthesia. Medical doctors identify the location of the epidural space by feeling the drop of force in advancing the needle tip. A greater drop of force makes for a safer needle. ⋯ We found no obvious tendency regarding the effect of the insertion speed. The drop in the force in the rubber was one-fourth greater than that in the bone. Our conclusions are that 1) the higher the needle tip design, the greater the drop in force can be achieved; and that 2) silicone rubber with a hardness of 50 Hs is similar to the ligamentum flavum.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2007
Using standards to automate electronic health records (EHRs) and to create integrated healthcare enterprises.
President Bush's 2004 Executive Order mandated the creation within the Secretary of Health and Human Services' staff of a new Office of the National Coordinator for Healthcare Information Technology (ONCHIT) that was tasked with creating the United States National Healthcare Information Network (NHIN). The Health Insurance Portability and Accountability Act of 1996 (HIPAA) and the 2004 and a subsequent 2006 Executive Orders have finally set the stage to design, and require, the use of standardized, electronic data interchange-enabled information systems as quickly as possible.