Udruženost višestrukih moždanih aneurizma i moždane arteriovenske malformacije: prikaz slučaja i pregled literature

The incidence of aneurysmal subarachnoid hemorrhage is about 10-11 cases per 100,000 inhabitants. The true incidence of multiple aneurysms is not known, however, according to previous studies it may vary between 20% and 30%. The association of arteriovenous malformation and cerebral aneurysm is well documented and varies between 20% and 30%. A case is described of a 47-year-old female presenting with massive acute subarachnoid hemorrhage. Computed tomography and cerebral panangiography revealed seven saccular aneurysms (five along the left anterior cerebral artery and its branches, one at the left M1/2 junction, and one in the anterior communicating artery), and an arteriovenous malformation involving the left frontal and parietal lobe fed mostly by the left anterior cerebral artery. Neurosurgeons clipped all seven aneurysms and then the arteriovenous malformation was extirpated.Incidencija aneurizmatskog subarahnoidnog krvarenja iznosi oko 10-11 slučajeva na 100.000 stanovnika. Stvarna incidencija višestrukih aneurizma nije poznata, no prema prethodnim ispitivanjima ona bi se mogla kretati između 20% i 30%. Udruženost arteriovenske malformacije i moždane aneurizme dobro je dokumentirana i kreće se između 20% i 30%. Autori izvješćuju o slučaju 47-godišnje žene koja je dola s opsežnim akutnim subarahnoidnim krvarenjem. Kompjutorizirana tomografija i cerebralna panangiografija otkrile su sedam sakularnih aneurizma (pet duž lijeve prednje moždane arterije i njezinih ogranaka, jednu na lijevom spoju M1/2 i jednu u prednjoj komunikacijskoj arteriji) i arteriovensku malformaciju koja je zahvaćala lijevi frontalni i parijetalni režanj koji se uglavnom opskrbljuje putem lijeve prednje moždane arterije. Neurokirurzi su štipaljkama učvrstili svih sedam aneurizama, nakon čega je uklonjena arteriovenska malformacija

Electrochemical polymerization of ambipolar carbonyl-functionalized indenofluorene with memristive properties

Carbonyl-functionalized indenofluorene was electropolymerized with a high faradaic efficiency of 85% and the solid state properties of the resulting polymeric thin films were investigated. They displayed modular optical properties depending on their oxidation state. The approach used for inorganic semiconductors was applied to polyindeonofluorene derivative. Mott-Schottky analysis evidenced a switching from p-type to n-type electrical conduction, suggesting an ambipolar behaviour of the polymer. As an application, flexible organic memristors were fabricated and resistive switching properties were observed