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Assessment of myocardial viability using a minimally invasive laser Doppler flowmetry on pig model

Journal of Innovative Optical Health Sciences 2021年第2期4卷 51-57页

作者： karina litvinova Berthold Stegemann Francisco Leyva Aston Medical School Aston University Aston TriangleB47ETBirminghamUK Cardiology Department Queen Elizabeth Hospital Mindelsohn WayB152THBirminghamUK

Background:The intra-operative real-time assessment of tissue viability can potentially improve therapy delivery and clinical outcome in cardiovascular *** ablation therapy for the treatment of supraventricular or ventricular arrhythmia continues to be done without being able to assess if the intended lesion and lesion size have been ***,we report a method for continuous measurements of cardiac muscle microcirculation to provide an instrument for real-time ablation ***:We performed two acute open chest animal studies to assess the ability to perform real-time monitoring of creation and size of ablation lesion using a standard RF irrigated *** ablation and laser Doppler were applied to different endocardial areas of alive open-chest ***:We performed two experiments at three different RF ablation energy setting and different ablation ***-fusion signals before and after ablation were found extensively and distinctively *** in-creasing the ablation energy and time,the perfusion signal was ***:In vivo assessing the local microcirculation during RF ablation by laser Doppler can potentially be useful to differentiate between viable and nonviable ablated beating heart in real time.

关键词： Beating heart RF ablation perfusion real-time monitoring myocardial microcirculation

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Detection of angiospastic disorders in the microcirculatory bed using laser diagnostics technologies

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Journal of Innovative Optical Health Sciences 2018年第1期11卷 65-79页

作者： Irina N.Makovik Andrey V.Dunaev Victor V.Dremin Alexander I.Krupatkin Viktor V.Sidorov Lyudmila S.Khakhicheva Vadim F.Muradyan Olga V.Pilipenko Ilya E.Rafailov karina S.litvinova Biomedical Photonics Instrumentation Group Scientic-Educational Centre of"Biomedical Engineering"Orel State University named after I.S.Turgenev Orel 302026 Russian Federation Priorov Central Research Institute of Traumatology and Orthopaedics Moscow 127299 Russian Federation SPE"LAZMA"Ltd Moscow 125252Russian Federation Orel Regional Clinical Hospital Orel 302028 Russian Federation School of Engineering and Applied Sciences Aston Institute of Photonic Technologies Aston University BirminghamB47ETUK Optoelectronics and Biomedical Photonics Group Aston Institute of Photonic Technologies Aston University BirminghamB47ETUK Aston Medical School Aston University BirminghamB47ETUK

The evaluation of the microcirculatory bed functional state and the identification of angiospastic disorders with related complications,when the pathological changes are reversible,have an important role in medical *** aim of this study was to evaluate the possibility of using optical noninvasive methods and the cold pressor test to solve this problem.A total of 33 patients with rheumatological diseases and 32 healthy volunteers were included in the *** Doppler flowmetry,tissue reflectance oximetry and pulse oximetry were used as optical noninvasive *** parameters were recorded before,immediately after and 20 min after the cold pressor *** on the measured parameters,the complex parameters of the microcirculatory bed were calculated.A detailed statistical analysis of the parameter changes for each individual in the two groups displayed diverse microcirculatory bed parameter responses upon cold exposure,with differing recovery of parameters after *** diagnostic criteria were proposed for the identification of angiospastic *** to the proposed criteria,27 people of the volunteers group were confirmed to not display any *** the patient group,however,18 people were observed to have a relatively normal functional state of the microcirculatory bed,while 15 people were observed to have a possible tendency to *** highlight the diferences between a relatively normal state and presence of angiospastic disorders,statistical analysis of experimental data was carried out,which revealed significant *** analysis of data with angiospastic disorders identified a relationship between their diagnoses and the results of labo-ratory ***,the evaluation of combined noninvasive optical diagnostic method use,the cold pressor test and proposed diagnostic criteria showed a positive *** approach can be used to detect the presence of possible angiospastic disorders and related complications,as

关键词： Noninvasive diagnostics laser Doppler flowmetry tissue relctance oximetry pulse oximetry cold pressor test microcirculatory bed angiospasm

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