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Fu C, Wang D, Wang L, Zhu L, Li Z, Chen T, Feng H, Li F. Diffuse optical detection of global cerebral ischemia in an adult porcine model. JOURNAL OF BIOPHOTONICS 2023; 16:e202200168. [PMID: 36397661 DOI: 10.1002/jbio.202200168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 11/13/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Rapid screening for ischemic strokes in prehospital settings may improve patient outcomes by allowing early deployment of vascular recanalization therapies. However, there are no low-cost and convenient methods that can assess ischemic strokes in such a setting. Diffuse correlation spectroscopy (DCS) is a promising method for continuous, noninvasive transcranial monitoring of cerebral blood flow. In this study, we used a DCS system to detect cerebral hemodynamics before and after acute ischemic stroke in pigs. Seven adult porcines were chosen to establish ischemic stroke models via bilateral common carotid artery ligation (n = 5) or air emboli (n = 2). The results showed a significant difference in blood flow index (BFI) between the normal and ischemic groups. Relative blood flow index (rBFI) exhibited excellent results. Therefore, the diffuse optical method can assess the hemodynamic changes in acute cerebral ischemic stroke onset in pigs, and rBFI may be a promising biomarker for identifying cerebral ischemic stroke.
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Affiliation(s)
- Chuhua Fu
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
- Department of Neurosurgery, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, People's Republic of China
| | - Detian Wang
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan, People's Republic of China
| | - Long Wang
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
| | - Liguo Zhu
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan, People's Republic of China
| | - Zeren Li
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan, People's Republic of China
| | - Tunan Chen
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
| | - Hua Feng
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
| | - Fei Li
- Department of Neurosurgery of Southwest Hospital, Army Medical University, Chong Qing, People's Republic of China
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Eliyas JK, Niekrasz M, Wardrip C, Lee SK. Focused post mortem dissection technique for harvest of rete mirabile in domestic swine (Sus scrofa). J Neurointerv Surg 2015; 8:973-6. [PMID: 26359213 DOI: 10.1136/neurintsurg-2015-011949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 08/31/2015] [Indexed: 11/03/2022]
Abstract
BACKGROUND Rete mirabile (RM) of the domestic pig is a popular animal model of arteriovenous malformations. The RM (Latin for 'wonderful net)' comprises the arterioarterial portal connecting ascending pharyngeal arteries and the internal carotid arteries, which exists in the skull base of even-toed ungulates. Although angiographic access of the RM is relatively easy, its post mortem procurement is complicated and its detailed technique has not been well described. OBJECTIVE To present our focused post mortem dissection technique for undamaged and complete harvest of the RM. MATERIALS AND METHODS Fourteen domestic (40-70 lb (18-32 kg)) swine were used in this study. Angiographies were performed under general anesthesia in all animals. A 5F Berenstein catheter was used for angiography and a 014 microcatheter was used to obtain superselective angiography. A stepwise surgical dissection technique has been developed to efficiently harvest RM. Angiographic and surgical anatomy were also compared. RESULTS The RM was supplied by bilateral ascending pharyngeal arteries. Bilateral anterior cerebral arteries, middle cerebral arteries, and the basilar system were identified rostral to the RM. Our surgical dissection technique was developed during a project to streamline harvesting of the RM and a stepwise description is as follows: (1) decapitate the swine by removing the head through the plane of the occiput and C1 vertebral body; (2) remove the tongue and oropharynx via a ventral approach; (3) dissect through the posterior pharyngeal wall identifying bilateral tympanic bullae and the basisphenoid bone; and (4) remove the basisphenoid bone about one and half inches above the rostral end of the tympanic bullae to fully expose the rete. CONCLUSIONS The RM can be procured efficiently and effectively with our technique, without requiring any sophisticated surgical devices.
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Affiliation(s)
| | - Marek Niekrasz
- Animal Resources Center, University of Chicago, Chicago, Illinois, USA
| | - Craig Wardrip
- Animal Resources Center, University of Chicago, Chicago, Illinois, USA
| | - Seon-Kyu Lee
- Section of Neurosurgery, Department of Surgery and Radiology, University of Chicago, Chicago, Illinois, USA
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Gentric JC, Raymond J, Batista A, Salazkin I, Gevry G, Darsaut TE. Dual-lumen balloon catheters may improve liquid embolization of vascular malformations: an experimental study in Swine. AJNR Am J Neuroradiol 2015; 36:977-81. [PMID: 25593200 DOI: 10.3174/ajnr.a4211] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 11/06/2014] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Liquid embolic agents are increasingly used to treat vascular malformations. We sought to assess embolization with these agents by using a dual-lumen balloon catheter in an experimental setting. MATERIALS AND METHODS Eighteen injections of liquid embolic agents were performed in the rete mirabile of swine. We used 3 methods to control liquid embolic agent reflux: 1) dual-lumen balloon-catheter (group A, n = 8); 2) injection of liquid embolic agent after proximal n-BCA plug formation through a second microcatheter (group B, n = 4); and 3) standard liquid embolic agent injection (group C, controls, n = 6). The following outcomes were graded by using ordinal scales by angiography, macrophotography, and radiography of retia after euthanasia: 1) angiographic and pathologic extent of liquid embolic agent embolization of the rete, 2) reflux of liquid embolic agents in the parent artery, and 3) density of liquid embolic agents in the proximal rete. Technical complications were also recorded. A successful injection was defined as an embolization that reached the contralateral rete without reflux into proximal external branches. Exact logistic regression analyses were performed to compare groups. RESULTS There were significant differences among groups for reflux (P = .029) and liquid embolic agent density in the proximal rete (P = .014), while extension to the contralateral rete did not reach statistical significance (P = .07). Injections differed among groups (P = .004), with dual-lumen balloon-catheter injections more frequently successful compared with control injections (P = .019). CONCLUSIONS Dual-lumen balloon catheters allowed better liquid embolic agent injections than standard injections.
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Affiliation(s)
- J C Gentric
- From the Department of Radiology (J.C.G., J.R., A.B.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, Montreal, Quebec, Canada Equipe d'Accueil 3878 - Groupe d'Etude de la Thrombose en Bretagne Occidentale (J.C.G.), Université de Bretagne Occidentale, Brest, France
| | - J Raymond
- From the Department of Radiology (J.C.G., J.R., A.B.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, Montreal, Quebec, Canada Laboratory of Interventional Neuroradiology (J.R., I.S., G.G.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital Research Centre, Montreal, Quebec, Canada
| | - A Batista
- From the Department of Radiology (J.C.G., J.R., A.B.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, Montreal, Quebec, Canada
| | - I Salazkin
- Laboratory of Interventional Neuroradiology (J.R., I.S., G.G.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital Research Centre, Montreal, Quebec, Canada
| | - G Gevry
- Laboratory of Interventional Neuroradiology (J.R., I.S., G.G.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital Research Centre, Montreal, Quebec, Canada
| | - T E Darsaut
- Division of Neurosurgery (T.E.D.), Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Zhang C, Chaudhary N, Gemmete JJ, Thompson BG, Xi G, Pandey AS. Reactive tissue proliferation and damage of elastic lamina caused by hydrogel coated coils in experimental rat aneurysms. J Neurointerv Surg 2013; 6:480-6. [PMID: 24068780 DOI: 10.1136/neurintsurg-2013-010867] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND OBJECTIVE The HydroCoil Endovascular Aneurysm Occlusion and Packing Study clinical trial, comparing HydroCoil with platinum coils, reported an 8.6% reduction in significant recurrence following cerebral aneurysm coil embolization. We sought to better understand the mechanism of aneurysmal healing following HydroCoil implantation using the rat external carotid artery (ECA) sidewall aneurysm model. METHODS We ligated the proximal ECA, creating a blind pouch in our rat model. HydroCoil or bare platinum coil segments (5 mm) were inserted into aneurysms. Sham operated rats underwent identical procedures without coil insertion. 14 days after coil embolization, animals were sacrificed and the common carotid artery/internal carotid artery/ECA complex removed. Sac and surrounding vasculature underwent microscopic and histopathologic evaluation. Cellular and fibrotic components within the sac were defined as the organized area. Percentage of organized area and residual length of internal elastic lamina were calculated. RESULTS Organized tissue area in ECA sac 2 weeks following coil embolization was significantly greater in the HydroCoil group than the bare coil (60.42±22.58% vs 15.62±19.24%; p=0.01) and sham (60.42±22.58% vs 4.61±3.86%; p=0.002) groups. Elastic lamina was significantly reduced in the HydroCoil group compared with the sham and bare coil groups (21.67±16.50% vs 100% and 96.06±8.78%; both p<0.001). No significant difference was found between the bare coil and sham groups for organized tissue formation or reduction in elastic lamina. Greater numbers of B cells, T cells, and neutrophils were present within HydroCoil induced organized tissue compared with the platinum group; this difference was not statistically significant. CONCLUSIONS In the rat ECA sidewall aneurysm model, hydrogel coated coils cause more tissue reaction and organization compared with bare platinum coils, possibly attributed to observed elastic lamina damage and vascular smooth muscle cell proliferation.
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Affiliation(s)
- Chao Zhang
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA Department of Neurosurgery, Huashan Hospital, Fudan University, China
| | - Neeraj Chaudhary
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Joseph J Gemmete
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - B Gregory Thompson
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA Radiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Guohua Xi
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Aditya S Pandey
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
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Massoud TF. Transvenous Retrograde Nidus Sclerotherapy Under Controlled Hypotension (TRENSH). Neurosurgery 2013; 73:332-42; discussion 342-3. [DOI: 10.1227/01.neu.0000430765.80102.77] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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