Animal model of assessing cerebrovascular functional reserve by imaging photoplethysmography
Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining treatment tactics, and controlling the revascularization outcome in the case of reconstructive interventions on the brain vessels. However, there i...
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Published in | Scientific reports Vol. 10; no. 1; p. 19008 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
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04.11.2020
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Abstract | Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining treatment tactics, and controlling the revascularization outcome in the case of reconstructive interventions on the brain vessels. However, there is no easy-to-use, contactless method for either assessing the functional reserve of the cortical vascular network or intraoperative monitoring of surgical intervention. Our study aims to demonstrate feasibility of green-light imaging photoplethysmography (iPPG) to estimate cerebrovascular functional reserve in animal model of craniosurgical intervention. Custom-made iPPG system was exploited to visualize intracranial vessels in anesthetized Wistar rats (n = 15). Video frames of rat's cortex were recorded concurrently with systemic blood pressure, end-tidal CO
, and electrocardiogram. We found that injection of dorzolamide (carbonic-anhydrase inhibitor) significantly increased the blood-pulsations amplitude in all animals by 35 ± 19% (p < 0.001). Such an increase negatively correlated with significant decrease in end-tidal CO
by 32 ± 7% (p < 0.001). It is noteworthy that the dorzolamide injection did not lead to significant changes in systemic blood pressure. Concluding, pulsations amplitude is a marker of the vascular tone that can be used to evaluate the functional cerebrovascular reserve. Imaging PPG is a simple and convenient method to assess cerebral blood flow, including during various neurosurgical interventions. |
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AbstractList | Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining treatment tactics, and controlling the revascularization outcome in the case of reconstructive interventions on the brain vessels. However, there is no easy-to-use, contactless method for either assessing the functional reserve of the cortical vascular network or intraoperative monitoring of surgical intervention. Our study aims to demonstrate feasibility of green-light imaging photoplethysmography (iPPG) to estimate cerebrovascular functional reserve in animal model of craniosurgical intervention. Custom-made iPPG system was exploited to visualize intracranial vessels in anesthetized Wistar rats (n = 15). Video frames of rat's cortex were recorded concurrently with systemic blood pressure, end-tidal CO
, and electrocardiogram. We found that injection of dorzolamide (carbonic-anhydrase inhibitor) significantly increased the blood-pulsations amplitude in all animals by 35 ± 19% (p < 0.001). Such an increase negatively correlated with significant decrease in end-tidal CO
by 32 ± 7% (p < 0.001). It is noteworthy that the dorzolamide injection did not lead to significant changes in systemic blood pressure. Concluding, pulsations amplitude is a marker of the vascular tone that can be used to evaluate the functional cerebrovascular reserve. Imaging PPG is a simple and convenient method to assess cerebral blood flow, including during various neurosurgical interventions. Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining treatment tactics, and controlling the revascularization outcome in the case of reconstructive interventions on the brain vessels. However, there is no easy-to-use, contactless method for either assessing the functional reserve of the cortical vascular network or intraoperative monitoring of surgical intervention. Our study aims to demonstrate feasibility of green-light imaging photoplethysmography (iPPG) to estimate cerebrovascular functional reserve in animal model of craniosurgical intervention. Custom-made iPPG system was exploited to visualize intracranial vessels in anesthetized Wistar rats (n = 15). Video frames of rat’s cortex were recorded concurrently with systemic blood pressure, end-tidal CO2, and electrocardiogram. We found that injection of dorzolamide (carbonic-anhydrase inhibitor) significantly increased the blood-pulsations amplitude in all animals by 35 ± 19% (p < 0.001). Such an increase negatively correlated with significant decrease in end-tidal CO2 by 32 ± 7% (p < 0.001). It is noteworthy that the dorzolamide injection did not lead to significant changes in systemic blood pressure. Concluding, pulsations amplitude is a marker of the vascular tone that can be used to evaluate the functional cerebrovascular reserve. Imaging PPG is a simple and convenient method to assess cerebral blood flow, including during various neurosurgical interventions. Abstract Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining treatment tactics, and controlling the revascularization outcome in the case of reconstructive interventions on the brain vessels. However, there is no easy-to-use, contactless method for either assessing the functional reserve of the cortical vascular network or intraoperative monitoring of surgical intervention. Our study aims to demonstrate feasibility of green-light imaging photoplethysmography (iPPG) to estimate cerebrovascular functional reserve in animal model of craniosurgical intervention. Custom-made iPPG system was exploited to visualize intracranial vessels in anesthetized Wistar rats (n = 15). Video frames of rat’s cortex were recorded concurrently with systemic blood pressure, end-tidal CO 2 , and electrocardiogram. We found that injection of dorzolamide (carbonic-anhydrase inhibitor) significantly increased the blood-pulsations amplitude in all animals by 35 ± 19% ( p < 0.001). Such an increase negatively correlated with significant decrease in end-tidal CO 2 by 32 ± 7% ( p < 0.001). It is noteworthy that the dorzolamide injection did not lead to significant changes in systemic blood pressure. Concluding, pulsations amplitude is a marker of the vascular tone that can be used to evaluate the functional cerebrovascular reserve. Imaging PPG is a simple and convenient method to assess cerebral blood flow, including during various neurosurgical interventions. Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining treatment tactics, and controlling the revascularization outcome in the case of reconstructive interventions on the brain vessels. However, there is no easy-to-use, contactless method for either assessing the functional reserve of the cortical vascular network or intraoperative monitoring of surgical intervention. Our study aims to demonstrate feasibility of green-light imaging photoplethysmography (iPPG) to estimate cerebrovascular functional reserve in animal model of craniosurgical intervention. Custom-made iPPG system was exploited to visualize intracranial vessels in anesthetized Wistar rats (n = 15). Video frames of rat’s cortex were recorded concurrently with systemic blood pressure, end-tidal CO 2 , and electrocardiogram. We found that injection of dorzolamide (carbonic-anhydrase inhibitor) significantly increased the blood-pulsations amplitude in all animals by 35 ± 19% ( p < 0.001). Such an increase negatively correlated with significant decrease in end-tidal CO 2 by 32 ± 7% ( p < 0.001). It is noteworthy that the dorzolamide injection did not lead to significant changes in systemic blood pressure. Concluding, pulsations amplitude is a marker of the vascular tone that can be used to evaluate the functional cerebrovascular reserve. Imaging PPG is a simple and convenient method to assess cerebral blood flow, including during various neurosurgical interventions. |
ArticleNumber | 19008 |
Author | Osipchuk, Anastasija V Romashko, Roman V Kamshilin, Alexei A Mamontov, Oleg V Sokolov, Alexey Y Zaytsev, Valery V Volynsky, Maxim A |
Author_xml | – sequence: 1 givenname: Oleg V surname: Mamontov fullname: Mamontov, Oleg V organization: Department of Departmental Therapy, Pavlov First Saint Petersburg State Medical University, Saint Petersburg, Russia – sequence: 2 givenname: Alexey Y surname: Sokolov fullname: Sokolov, Alexey Y organization: Pavlov Institute of Physiology of the Russian Academy of Sciences, Saint Petersburg, Russia – sequence: 3 givenname: Maxim A surname: Volynsky fullname: Volynsky, Maxim A organization: Faculty of Applied Optics, ITMO University, Saint Petersburg, Russia – sequence: 4 givenname: Anastasija V surname: Osipchuk fullname: Osipchuk, Anastasija V organization: Department of Neuropharmacology, Valdman Institute of Pharmacology, Pavlov First Saint Petersburg State Medical University, Saint Petersburg, Russia – sequence: 5 givenname: Valery V surname: Zaytsev fullname: Zaytsev, Valery V organization: Faculty of Applied Optics, ITMO University, Saint Petersburg, Russia – sequence: 6 givenname: Roman V surname: Romashko fullname: Romashko, Roman V organization: Laboratory of High-Precision Optical Measurements, Institute of Automation and Control Processes FEB RAS, Vladivostok, Russia – sequence: 7 givenname: Alexei A surname: Kamshilin fullname: Kamshilin, Alexei A email: alexei.kamshilin@yandex.ru, alexei.kamshilin@yandex.ru organization: Faculty of Photonics and Optical Information, ITMO University, Saint Petersburg, Russia. alexei.kamshilin@yandex.ru |
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Cites_doi | 10.1007/s11883-018-0739-5 10.1364/OE.17.015670 10.1046/j.1468-2982.1997.1704518.x 10.1097/01.WCB.0000137057.92786.F3 10.3389/fnins.2019.01235 10.1080/01616412.1986.11739760 10.3174/ajnr.A4973 10.1002/jbio.201800408 10.1038/s41598-018-32036-7 10.1007/s00134-005-2790-2 10.3390/app10186192 10.1186/s13019-019-0961-4 10.1111/j.1748-1716.1953.tb00928.x 10.1364/BOE.6.002588 10.1007/978-1-4612-1190-7_35 10.1152/jn.01200.2011 10.1016/j.jstrokecerebrovasdis.2019.03.001 10.1186/cc8939 10.2967/jnumed.117.195818 10.1046/j.1468-1331.2003.00675.x 10.1364/BOE.7.002469 10.1007/BF01617328 10.1007/978-3-030-17935-9_43 10.1227/01.NEU.0000245582.08532.7C 10.1172/JCI111579 10.1016/j.measurement.2009.02.005 10.1002/mrm.27956 10.1098/rstb.2015.0360 10.1161/CIRCRESAHA.116.303504 |
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Snippet | Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis, determining... Abstract Assessment of the cerebral blood-flow-reserve in patients with cerebrovascular diseases is extremely important in terms of making prognosis,... |
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SubjectTerms | Animal models Animals Blood flow Blood pressure Carbon dioxide Carbonic Anhydrase Inhibitors - administration & dosage Carbonic anhydrases Cerebral blood flow Cerebrovascular Circulation - drug effects Cerebrovascular diseases Cerebrovascular Disorders - physiopathology EKG Feasibility studies Heart Rate - drug effects Injection Male Models, Animal Neuroimaging Neurosurgery Photoplethysmography - methods Rats, Wistar Sulfonamides - administration & dosage Thiophenes - administration & dosage Vascular diseases |
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Title | Animal model of assessing cerebrovascular functional reserve by imaging photoplethysmography |
URI | https://www.ncbi.nlm.nih.gov/pubmed/33149189 https://www.proquest.com/docview/2471538511/abstract/ https://search.proquest.com/docview/2457969922 https://pubmed.ncbi.nlm.nih.gov/PMC7642404 |
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