scholarly journals Occlusion of maxillary artery in treatment of trigeminal neuralgia

2012 ◽  
Vol 65 (7-8) ◽  
pp. 281-284 ◽  
Author(s):  
Vesna Novak ◽  
Petar Bosnjakovic ◽  
Sasa Ristic ◽  
Aleksandar Kostic ◽  
Boban Jelenkovic ◽  
...  
Keyword(s):  
Trigeminal Neuralgia ◽  
Base Material ◽  
Subjective Assessment ◽  
Original Method ◽  
Maxillary Artery ◽  
Artery Ligation ◽  
Carotid Artery Ligation ◽  
Vascular Elements ◽  
Electrophysiological Method ◽  
The Face

Introduction. This paper deals with a treating method of trigeminal neuralgia classified so far as idiopathic neuralgias and treated conservatively. The study was aimed at proving the compression of peripheral branches of n. trigeminus in those patients by vascular elements of a. maxillaris within the bone-ligament space of the scull and the face base. Material and Methods. The study sample consisted of 76 patients having trigeminal neuralgia. The compression was proved by clinical examination, by angiography and electrophysiological investigations. Endovascular occlusion of a. maxillaris is the original method and it was carried out in selected patients. Results. This method was applied in 76 patients. Embolisation was done in 71 patients by using occlusion spiral and gelfoan was used in 3 patients. Externa carotid artery ligation was done in 2 cases. Conclusion. The effect of absolute improvement has been achieved and verified by electrophysiological method and subjective assessment of the patients.

scholarly journals Design of Thermal Insulation Materials with Different Geometries of Channels

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2217
Author(s):  
Daniela Șova ◽  
Mariana Domnica Stanciu ◽  
Sergiu Valeriu Georgescu
Keyword(s):  
Thermal Conductivity ◽  
Porous Structure ◽  
Base Material ◽  
Cost Effective ◽  
Heat Radiation ◽  
Average Temperature ◽  
Temperature Regimes ◽  
The Face ◽  
Inclined Channels ◽  
Air Channels

Investigating the large number of various materials now available, some materials scientists promoted a method of combining existing materials with geometric features. By studying natural materials, the performance of simple constituent materials is improved by manipulating their internal geometry; as such, any base material can be used by performing millimeter-scale air channels. The porous structure obtained utilizes the low thermal conductivity of the gas in the pores. At the same time, heat radiation and gas convection is hindered by the solid structure. The solution that was proposed in this research for obtaining a material with porous structure consisted in perforating extruded polystyrene (XPS) panels, as base material. Perforation was performed horizontally and at an angle of 45 degrees related to the face panel. The method is simple and cost-effective. Perforated and simple XPS panels were subjected to three different temperature regimes in order to measure the thermal conductivity. There was an increase in thermal conductivity with the increase in average temperature in all studied cases. The presence of air channels reduced the thermal conductivity of the perforated panels. The reduction was more significant at the panels with inclined channels. The differences between the thermal conductivity of simple XPS and perforated XPS panels are small, but the latter can be improved by increasing the number of channels and the air channels’ diameter. Additionally, the higher the thermal conductivity of the base material, the more significant is the presence of the channels, reducing the effective thermal conductivity. A base material with low emissivity may also reduce the thermal conductivity.

scholarly journals Contribution of PDGFRα-positive cells in maintenance and injury responses in mouse large vessels

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kenichi Kimura ◽  
Karina Ramirez ◽  
Tram Anh Vu Nguyen ◽  
Yoshito Yamashiro ◽  
Aiko Sada ◽  
...  
Keyword(s):  
Growth Factor Receptor ◽  
Pressure Overload ◽  
Vascular Diseases ◽  
Cell Types ◽  
Lineage Tracing ◽  
Neointima Formation ◽  
Artery Ligation ◽  
Carotid Artery Ligation ◽  
Factor Receptor Alpha ◽  
Adventitial Cells

AbstractThe maladaptive remodeling of vessel walls with neointima formation is a common feature of proliferative vascular diseases. It has been proposed that neointima formation is caused by the dedifferentiation of mature smooth muscle cells (SMCs). Recent evidence suggests that adventitial cells also participate in neointima formation; however, their cellular dynamics are not fully understood. In this study, we utilized a lineage tracing model of platelet-derived growth factor receptor alpha (PDGFRa) cells and examined cellular behavior during homeostasis and injury response. PDGFRa marked adventitial cells that were largely positive for Sca1 and a portion of medial SMCs, and both cell types were maintained for 2 years. Upon carotid artery ligation, PDGFRa-positive (+) cells were slowly recruited to the neointima and exhibited an immature SMC phenotype. In contrast, in a more severe wire denudation injury, PDGFRa+ cells were recruited to the neointima within 14 days and fully differentiated into SMCs. Under pressure overload induced by transverse aortic constriction, PDGFRa+ cells developed marked adventitial fibrosis. Taken together, our observations suggest that PDGFRa+ cells serve as a reservoir of adventitial cells and a subset of medial SMCs and underscore their context-dependent response to vascular injuries.

Common carotid artery ligation at the proximal side before rupture in patients with ligation or occlusion of the external carotid artery at risk of carotid blowout syndrome

2019 ◽  
Vol 49 (9) ◽  
pp. 839-844
Author(s):  
Fumihiko Matsumoto ◽  
Satoko Matsumura ◽  
Taisuke Mori ◽  
Ayaka Mori ◽  
Go Omura ◽  
...  
Keyword(s):  
High Risk ◽  
Carotid Artery ◽  
Common Carotid Artery ◽  
External Carotid Artery ◽  
External Carotid ◽  
Artery Ligation ◽  
Bleeding Point ◽  
Carotid Blowout Syndrome ◽  
Proximal Side ◽  
Carotid Artery Ligation

CCA ligation at the proximal side of the bleeding point under local anesthesia and before rupture is a treatment option for patients at high risk of CBS.

scholarly journals Partially Thrombosed Internal Maxillary Pseudoaneurysm after Gunshot Wound

2016 ◽  
Vol 9 (4) ◽  
pp. 335-337 ◽  
Author(s):  
Menachem Gold
Keyword(s):  
Gold Standard ◽  
Gunshot Wound ◽  
Bone Fractures ◽  
Maxillary Artery ◽  
Digital Subtraction ◽  
Fat Pad ◽  
Facial Bone ◽  
Artery Pseudoaneurysm ◽  
Ct Angiogram ◽  
The Face

A 29-year-old man arrived in our emergency department after being shot on the face. Computed tomography (CT) revealed multiple facial bone fractures along the bullet trajectory. On day 10 of admission, CT angiogram of the neck revealed a partially thrombosed pseudoaneurysm in the parapharyngeal fat pad. The pseudoaneurysm was successfully treated with coil embolization. This report discusses diagnosis and treatment of a partially thrombosed internal maxillary artery pseudoaneurysm. Although digital subtraction angiography is the gold standard for pseudoaneurysm diagnosis, CT angiography may provide complimentary information, as seen in this case.

scholarly journals NAC and Vitamin D Restore CNS Glutathione in Endotoxin-Sensitized Neonatal Hypoxic-Ischemic Rats

Antioxidants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 489
Author(s):  
Lauren E. Adams ◽  
Hunter G. Moss ◽  
Danielle W. Lowe ◽  
Truman Brown ◽  
Donald B. Wiest ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Vitamin D ◽  
Redox Status ◽  
Therapeutic Window ◽  
Post Injury ◽  
Artery Ligation ◽  
Cellular Redox ◽  
Carotid Artery Ligation ◽  
Drug Concentrations

Therapeutic hypothermia does not improve outcomes in neonatal hypoxia ischemia (HI) complicated by perinatal infection, due to well-described, pre-existing oxidative stress and neuroinflammation that shorten the therapeutic window. For effective neuroprotection post-injury, we must first define and then target CNS metabolomic changes immediately after endotoxin-sensitized HI (LPS-HI). We hypothesized that LPS-HI would acutely deplete reduced glutathione (GSH), indicating overwhelming oxidative stress in spite of hypothermia treatment in neonatal rats. Post-natal day 7 rats were randomized to sham ligation, or severe LPS-HI (0.5 mg/kg 4 h before right carotid artery ligation, 90 min 8% O2), followed by hypothermia alone or with N-acetylcysteine (25 mg/kg) and vitamin D (1,25(OH)2D3, 0.05 μg/kg) (NVD). We quantified in vivo CNS metabolites by serial 7T MR Spectroscopy before, immediately after LPS-HI, and after treatment, along with terminal plasma drug concentrations. GSH was significantly decreased in all LPS-HI rats compared with baseline and sham controls. Two hours of hypothermia alone did not improve GSH and allowed glutamate + glutamine (GLX) to increase. Within 1 h of administration, NVD increased GSH close to baseline and suppressed GLX. The combination of NVD with hypothermia rapidly improved cellular redox status after LPS-HI, potentially inhibiting important secondary injury cascades and allowing more time for hypothermic neuroprotection.

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