Intraoperative thermography in safety control of the electrical stimulation mapping

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00314048" target="_blank" >RIV/68407700:21230/17:00314048 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11130/17:10373953 RIV/00064203:_____/17:10373953

Výsledek na webu

<a href="http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7985872" target="_blank" >http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7985872</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/MeMeA.2017.7985872" target="_blank" >10.1109/MeMeA.2017.7985872</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Intraoperative thermography in safety control of the electrical stimulation mapping

Popis výsledku v původním jazyce

The cortical Electric Stimulation Mapping (ESM) procedure is used as a standard approach to localize and continuously monitor function of the eloquent cortex and corticospinal tract during neurosurgical intervention. However, eliciting motor responses using standard ESM paradigm is frequently difficult to young children. We have thus developed and tested a novel EMS protocol, which uses intense, high frequency and short stimulation pulses. However, the intense stimulation peak-peak current (up to 100 mA) possess the potential risk of tissue damage.The thermographic measurement was performed in four selected patients in vivo using the high-resolution thermographic camera during resective epilepsy surgery to verify the safety of the novel EMS paradigm. The EMS paradigm was systematically tested for pulse currents gradually increased from 10 to 100 mA. A moving thermographic picture was stabilized and emissivity was corrected for each pixel to reach the correct temperature interpretation. The results show a local temperature increase in the brain tissue close to the stimulation electrode during the ESM with current intensity above 40 mA. The 100 mA current caused the maximal temperature increase +0.4 °C. This value added to patient basal temperature is far under safety level 39 °C. Although the temperature increase observed around the stimulating electrode during our ESM paradigm is very low, we are aware that the borderline between electrode and cortex could not be reliably measured. Estimation of the electrical current density and the temperature distribution must be modeled using 3D numerical simulations and compared with the thermographic measurement in future work.

Název v anglickém jazyce

Intraoperative thermography in safety control of the electrical stimulation mapping

Popis výsledku anglicky

The cortical Electric Stimulation Mapping (ESM) procedure is used as a standard approach to localize and continuously monitor function of the eloquent cortex and corticospinal tract during neurosurgical intervention. However, eliciting motor responses using standard ESM paradigm is frequently difficult to young children. We have thus developed and tested a novel EMS protocol, which uses intense, high frequency and short stimulation pulses. However, the intense stimulation peak-peak current (up to 100 mA) possess the potential risk of tissue damage.The thermographic measurement was performed in four selected patients in vivo using the high-resolution thermographic camera during resective epilepsy surgery to verify the safety of the novel EMS paradigm. The EMS paradigm was systematically tested for pulse currents gradually increased from 10 to 100 mA. A moving thermographic picture was stabilized and emissivity was corrected for each pixel to reach the correct temperature interpretation. The results show a local temperature increase in the brain tissue close to the stimulation electrode during the ESM with current intensity above 40 mA. The 100 mA current caused the maximal temperature increase +0.4 °C. This value added to patient basal temperature is far under safety level 39 °C. Although the temperature increase observed around the stimulating electrode during our ESM paradigm is very low, we are aware that the borderline between electrode and cortex could not be reliably measured. Estimation of the electrical current density and the temperature distribution must be modeled using 3D numerical simulations and compared with the thermographic measurement in future work.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2017 IEEE International Symposium on Medical Measurements and Applications (MeMeA)

ISBN

978-1-5090-2983-9

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

183-188

Název nakladatele

IEEE Service Center

Místo vydání

Piscataway

Místo konání akce

Rochester, Minesota

Datum konání akce

7. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—