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Normalized Power Transmission between ABP and ICP in TBI

Paper i proceeding
Författare Sima Shahsavari
Tobias Hallen
Tomas McKelvey
Catherine Eriksson-Ritzén
Bertil Rydenhag
Publicerad i Proceedings of the 31st Annual International Conference of the IEEE. Engineering in Medicine and Biology Society
Sidor 4699-4703
Publiceringsår 2009
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering
Sidor 4699-4703
Språk en
Ämnesord Transfer Function, traumatic Brain Injury, Arterial Blood Pressure, Intracranial Pressure
Ämneskategorier Signalbehandling

Sammanfattning

A new approach to study the pulse transmission between the cerebrovascular bed and the intracranial space is presented. In the proposed approach, the normalized power transmission between ABP and ICP has got the main attention rather than the actual power transmission. Evaluating the gain of the proposed transfer function at any single frequency can reveal how the percentage of contribution of that specific frequency component has been changed through the cerebrospinal system. The gain of the new transfer function at the fundamental cardiac frequency was utilized to evaluate the state of the brain in three TBI patients. Results were assessed using the reference evaluations achieved by a novel CT scanbased scoring scheme. In all three study cases, the gain of the transfer function showed a good capability to follow the trend of the CT scores and describe the brain state. Comparing the new transfer function with the traditional one and also the index of compensatory reserve, the proposed transfer function was found more informative about the state of the brain in the patients under study.

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