Intraoperative Imaging of Cortical Blood Flow by Camera-Based Photoplethysmography at Green Light

Mamontov, Oleg V.; Shcherbinin, Anton V.; Romashko, Roman V.; Kamshilin, Alexei A.

doi:10.3390/app10186192

Cited by 20 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, an imaging photoplethysmography (iPPG) technique has been proposed for visualization and contactless quantification of tissue blood perfusion 11 , 12 . Unlike traditional ICG-based intraoperative imaging, iPPG does not require any intravenous administration of any substance.…”

Section: Introductionmentioning

confidence: 99%

“…Unlike traditional ICG-based intraoperative imaging, iPPG does not require any intravenous administration of any substance. Successful application of iPPG at green illumination to assess changes in cortical blood-flow during open brain neurosurgery has been recently demonstrated in our group 11 . However, the use of iPPG in abdominal space is a challenging task due to significant variations of the examined organs morphology caused by respiration and peristalsis.…”

Section: Introductionmentioning

confidence: 99%

“…Various algorithms for processing video data have been proposed, aimed at increasing the reliability of revealing the heartbeat related information in conditions of significant interference from motion artifacts. These algorithms include image stabilization techniques via two-dimensional correlation tracking 13 or feature-related optical tracking 15 , use of Independent Component Analysis to retrieve a clean signal from color-channels mixture 14 , 16 , 17 , and stabilization of segmented images using optical flow algorithm to compensate heterogeneous and multidirectional motion 11 , 18 . However, most of the studies carried out with iPPG have dealt with images of subjects' skin.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Imaging photoplethysmography as an easy-to-use tool for monitoring changes in tissue blood perfusion during abdominal surgery

Kamshilin

Zaytsev

Lodygin

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

Evaluation of tissue perfusion at various stages of surgery is of great importance for the implementation of the concept of safe surgery, including operations on the abdominal organs. Currently, there is no accurate and reliable intraoperative method for assessing tissue perfusion that could help surgeons determine the risks of ischemia and improve outcomes. We propose novel method of intraoperative assessment of tissue perfusion using video camera synchronized with the electrocardiogram. The technique is referred to as imaging photoplethysmography (iPPG). It can be used continuously for monitoring blood supply to organs e.g., before and after anastomosis. In our study, we followed 14 different surgical cases (four stomach and ten colorectal cancers) requiring reconstruction of various organs with anastomosis. With iPPG, intraoperative blood perfusion was successfully visualized and quantified in all 14 patients under study. As most indicative, here we describe in detail two clinical demonstrations during gastrectomy for gastric cancer and right-sided hemicolectomy for cancer of the ascending colon. Feasibility of the iPPG system to assess blood perfusion in organs before and after anastomosis during open surgery was demonstrated for the first time.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Imaging photoplethysmography as an easy-to-use tool for monitoring changes in tissue blood perfusion during abdominal surgery

Kamshilin

Zaytsev

Lodygin

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…iPPG obtained from the chest can be used after major surgery to assess the differences in cutaneous perfusion [ 30 ]. It is also used to assess blood perfusion in the brain cortex during open brain surgery [ 196 ]. PulseCam [ 197 ] is a sensitive camera that can capture blood perfusion conveniently and affordably.…”

Section: Potential Applications Of Ppg Signal and Impacts On Healthcarementioning

confidence: 99%

Diagnostic Features and Potential Applications of PPG Signal in Healthcare: A Systematic Review

et al. 2022

View full text Add to dashboard Cite

Recent research indicates that Photoplethysmography (PPG) signals carry more information than oxygen saturation level (SpO2) and can be utilized for affordable, fast, and noninvasive healthcare applications. All these encourage the researchers to estimate its feasibility as an alternative to many expansive, time-wasting, and invasive methods. This systematic review discusses the current literature on diagnostic features of PPG signal and their applications that might present a potential venue to be adapted into many health and fitness aspects of human life. The research methodology is based on the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines 2020. To this aim, papers from 1981 to date are reviewed and categorized in terms of the healthcare application domain. Along with consolidated research areas, recent topics that are growing in popularity are also discovered. We also highlight the potential impact of using PPG signals on an individual’s quality of life and public health. The state-of-the-art studies suggest that in the years to come PPG wearables will become pervasive in many fields of medical practices, and the main domains include cardiology, respiratory, neurology, and fitness. Main operation challenges, including performance and robustness obstacles, are identified.

show abstract

“…However, their particular prototype is a typical PPG-probe that operates in contact with the skin and evaluates the blood-flow parameters at a single point. In contrast, the method of imaging PPG (iPPG) has recently become increasingly used to estimate tissue perfusion in vivo, allowing for the quantification of the spatial distribution of the blood flow parameters [ 28 , 29 ]. Moreover, it was recently shown that iPPG allows for the assessment of the local distribution of arterial vascular tone [ 30 ], as well as vascular resistance [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Method to Assess Endothelial Function via Monitoring of Perfusion Response to Local Heating by Imaging Photoplethysmography

Kamshilin

Zaytsev

Belaventseva

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

Endothelial dysfunction is one of the most important markers of the risk of cardiovascular complications. This study is aimed to demonstrate the feasibility of imaging photoplethysmography to assess microcirculation response to local heating in order to develop a novel technology for assessing endothelial function. As a measure of vasodilation, we used the relative dynamics of the pulsatile component of the photoplethysmographic waveform, which was assessed in a large area of the outer surface of the middle third of the subject’s forearm. The perfusion response was evaluated in six healthy volunteers during a test with local skin heating up to 40–42 °C and subsequent relaxation. The proposed method is featured by accurate control of the parameters affecting the microcirculation during the prolonged study. It was found that in response to local hyperthermia, a multiple increase in the pulsation component, which has a biphasic character, was observed. The amplitude of the first phase of the perfusion reaction depends on both the initial skin temperature and the difference between the basal and heating temperatures. The proposed method allows the assessment of a reproducible perfusion increase in response to hyperthermia developed due to humoral factors associated with the endothelium, thus allowing detection of its dysfunction.

show abstract

Intraoperative Imaging of Cortical Blood Flow by Camera-Based Photoplethysmography at Green Light

Cited by 20 publications

References 35 publications

Imaging photoplethysmography as an easy-to-use tool for monitoring changes in tissue blood perfusion during abdominal surgery

Imaging photoplethysmography as an easy-to-use tool for monitoring changes in tissue blood perfusion during abdominal surgery

Diagnostic Features and Potential Applications of PPG Signal in Healthcare: A Systematic Review

Novel Method to Assess Endothelial Function via Monitoring of Perfusion Response to Local Heating by Imaging Photoplethysmography

Contact Info

Product

Resources

About