title: Cellulose acetate polymer thrombosis for the emergency treatment of aneurysms: angiographic findings, clinical experience, and histopathological study.
abstract: Cellulose acetate polymer solution is a liquid thrombotic material that hardens into the shape of an aneurysm into which it is injected. Therapy using this solution is a rapid technique that helps prevent the rupture of aneurysms, especially those that extravasate contrast material during angiography in the acute stage of subarachnoid hemorrhage. Using this polymer solution and an endovascular technique, we treated two patients who had aneurysms of the basilar and anterior communicating arteries with extravasation of contrast material during angiography a few hours after the initial subarachnoid hemorrhage. In one patient with an aneurysm of the anterior communicating artery, the aneurysm's wall was perforated with the catheter during neurointerventional procedures. In both patients, postoperative angiograms demonstrated obliteration of the aneurysmal dome, including the site of extravasation or perforation. The parent artery and surrounding perforating branches were preserved. Although we do not advocate aggressive therapy for patients who bleed during angiography, we pursued this therapy in these two patients because of the opportunity to introduce cellulose acetate polymer in an attempt to preserve the patients' lives. Unfortunately, both patients died. Histopathological studies performed at the time of autopsy demonstrated that the luminal surface of cellulose acetate polymer was covered with thrombus by 6 days after cellulose acetate polymer thrombosis. By 10 days, the thrombus had a prominent fibrin network, a concentrated plasma component, and few fibrocytes adhering to its luminal surface.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Neurological Surgery, Okayama University Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kinugasa
authors.forename: S
authors.initials: S
authors.lastname: Mandai
authors.forename: S
authors.initials: S
authors.lastname: Tsuchida
authors.forename: K
authors.initials: K
authors.lastname: Sugiu
authors.forename: I
authors.initials: I
authors.lastname: Kamata
authors.forename: K
authors.initials: K
authors.lastname: Tokunaga
authors.forename: T
authors.initials: T
authors.lastname: Ohmoto
authors.forename: K
authors.initials: K
authors.lastname: Taguchi
mesh_terms: D000368:Aged; D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D015901:Angiography, Digital Subtraction; D001488:Basilar Artery / Q000473:pathology; D002482:Cellulose / Q000031:analogs & derivatives*; D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000473:pathology; D004621:Embolization, Therapeutic / Q000379:methods*; D004630:Emergencies; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000000981:diagnostic imaging / Q000473:pathology; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy*; D008297:Male; D011108:Polymers; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy
chemical_list: D011108:Polymers; C005062:acetylcellulose; D002482:Cellulose