Erik W. Jensen

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A new approach for quantifying the relationship between brain activity patterns and depth of anesthesia (DOA) is presented by analyzing the spatio-temporal patterns in the electroencephalogram (EEG) using Lempel-Ziv complexity analysis. Twenty-seven patients undergoing vascular surgery were studied under general anesthesia with sevoflurane, isoflurane,(More)
This report builds upon pertinent theoretical considerations regarding the nature and importance of routinization within families and describes the development and validation of a standardized inventory to measure family routines. The Family Routines Inventory (FRI) measures 28 positive, strength-promoting family routines, those observable, repetitive(More)
This paper describes the conceptual foundation underlying the development of the Family Routines Inventory, a new instrument designed to measure the extent of predictability or routinization in the daily life of a family. The primary impetus for the development of this instrument is a theoretical perspective in which family routines are regarded as(More)
For several decades, a number of methods have been developed for the noninvasive assessment of the level of consciousness during general anesthesia. In this paper, detrended fluctuation analysis is used to study the scaling behavior of the electroencephalogram as a measure of the level of consciousness. Three indexes are proposed in order to characterize(More)
BACKGROUND Autoregressive modeling with exogenous input of middle-latency auditory evoked potential (A-Line autoregressive index [AAI]) has been proposed for monitoring anesthetic depth. The aim of the current study was to compare the accuracy of this new index with the Bispectral Index (BIS), predicted effect-site concentration of propofol, and hemodynamic(More)
BACKGROUND This study was conducted to compare the performance accuracy of the independent variables Bispectral Index (BIS), A-Line ARX index (AAI), and predicted propofol effect-site concentration (CePROP) to measure the dependent variables of loss of responses to different stimulation defined as loss of response to verbal command (LORverbal), eyelash(More)
The objective of this article was to review the present methods used for validating the depth of hypnosis. We introduce three concepts, the real depth of hypnosis (DHreal), the observed depth of hypnosis (DHobs), and the electronic indices of depth of hypnosis (DHel-ind). The DHreal is the real state of hypnosis that the patient has in a given moment during(More)
BACKGROUND Extraction of the middle latency auditory evoked potentials (AEP) by an auto regressive model with exogenous input (ARX) enables extraction of the AEP within 1.7 s. In this way, the depth of hypnosis can be monitored at almost real-time. However, the identification and the interpretation of the appropriate signals of the AEP could be difficult to(More)
Simultaneously measured cardiac output obtained by thermodilution (TD), transcutaneous suprasternal ultrasonic Doppler (DOP), CO2-rebreathing (CR) and the direct Fick method (FI) were compared in eleven healthy subjects in a supine position (SU), a sitting position (SI), and during sitting exercise at a workload of 50 W (EX). The agreements between the(More)