Calibrating and Analyzing a Mathematical Model of Human Circulation and its Response to Hemorrhage

Author(s):  
William A. Pruett ◽  
Robert L. Hester

Complex physiological events such as hemorrhage are met with a continuum of responses in individual test subjects that range from complete compensation to circulatory failure. Predicting the circulatory outcome of an individual potentially affects treatment modalities, for example, by indicating that aggressive intervention is justified based on the likelihood of a negative result with a more passive therapy. We have previously determined an algorithm for calibrating and sampling parameter distributions that generate experimentally verified output distributions via an application of the Metropolis algorithm. This technique is advanced here by the addition of a three-pronged post hoc analysis. First is an inductive algorithm generating minimal parameter sets yielding efficient classification (MER). This algorithm is validated with PCA on the resulting parameter subsets. Finally, we provide an analysis on the response characteristics of clusters determined by a density dependent algorithm on the parameter/variable subspace indicated by the MER.

2018 ◽  
Vol 24 ◽  
pp. 80-81
Author(s):  
Konstantinos Toulis ◽  
Krishna Gokhale ◽  
G. Neil Thomas ◽  
Wasim Hanif ◽  
Krishnarajah Nirantharakumar ◽  
...  

2018 ◽  
Vol 24 ◽  
pp. 51-52
Author(s):  
Vanita Aroda ◽  
Danny Sugimoto ◽  
David Trachtenbarg ◽  
Mark Warren ◽  
Gurudutt Nayak ◽  
...  

2004 ◽  
Vol 18 (1) ◽  
pp. 13-26 ◽  
Author(s):  
Antoinette R. Miller ◽  
J. Peter Rosenfeld

Abstract University students were screened using items from the Psychopathic Personality Inventory and divided into high (n = 13) and low (n = 11) Psychopathic Personality Trait (PPT) groups. The P300 component of the event-related potential (ERP) was recorded as each group completed a two-block autobiographical oddball task, responding honestly during the first (Phone) block, in which oddball items were participants' home phone numbers, and then feigning amnesia in response to approximately 50% of items in the second (Birthday) block in which oddball items were participants' birthdates. Bootstrapping of peak-to-peak amplitudes correctly identified 100% of low PPT and 92% of high PPT participants as having intact recognition. Both groups demonstrated malingering-related P300 amplitude reduction. For the first time, P300 amplitude and topography differences were observed between honest and deceptive responses to Birthday items. No main between-group P300 effects resulted. Post-hoc analysis revealed between-group differences in a frontally located post-P300 component. Honest responses were associated with late frontal amplitudes larger than deceptive responses at frontal sites in the low PPT group only.


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