Question 1886
{"accessible":false,"alternatives":[{"id":9366,"text":"type A"},{"id":9367,"text":"type B"},{"id":9368,"text":"type C"},{"id":9369,"text":"type D"}],"archived":false,"correctAlternativeId":9366,"explanation":"\u003cp\u003e\u003cstrong\u003eBarrow caroticocavernous fistula classification\u003c/strong\u003e\u0026nbsp;divides\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/caroticocavernous-fistula-1?lang=gb\"\u003ecaroticocavernous fistulas\u003c/a\u003e\u0026nbsp;into;\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e\u0026nbsp;direct (type A)\u003c/strong\u003e\u003c/li\u003e\n\u003cli\u003e\u0026nbsp;\u003cstrong\u003eindirect (types B-D)\u003c/strong\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003cp\u003e\u003cstrong\u003e\u003c/strong\u003eThis classification was proposed by Barrow et al. in 1985.\u0026nbsp;Indirect fistulae are further subdivided according to whether the supply is from the internal carotid artery, external carotid artery, or both.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003cstrong\u003eClassification\u003c/strong\u003e\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003etype A\u0026nbsp;\u003c/strong\u003e(\u003cstrong\u003emost common\u003c/strong\u003e): a direct connection between the\u0026nbsp;intracavernous internal carotid artery,\u0026nbsp;and the\u0026nbsp;cavernous sinus\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003etype B\u003c/strong\u003e: dural shunt (indirect) between the\u0026nbsp;meningeal branches of the intracavernous internal carotid artery,\u0026nbsp;and the\u0026nbsp;cavernous sinus\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003etype C\u003c/strong\u003e: dural shunt \u0026nbsp;(indirect)\u0026nbsp;between the\u0026nbsp;meningeal branches of the external carotid artery, and the\u0026nbsp;cavernous sinus\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003etype D\u003c/strong\u003e: dural shunt \u0026nbsp;(indirect) between both\u0026nbsp;meningeal branches of the intracavernous internal carotid artery (type B),\u0026nbsp;and the\u0026nbsp;meningeal branches of the external carotid artery (type C), and the\u0026nbsp;cavernous sinus\u003c/li\u003e\n\u003c/ul\u003e","id":1886,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1886","nextQuestionPath":null,"relatedArticles":[{"id":1056,"title":"Caroticocavernous fistula","link":"/articles/caroticocavernous-fistula-1?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eAccording to\u0026nbsp;\u003cstrong\u003eBarrow classification\u003c/strong\u003e, what is the most common type of caroticocavernous fistulae?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1886"}],"attemptsPercentages":[{"alternativeId":"9369","percentage":1},{"alternativeId":"9367","percentage":13},{"alternativeId":"9366","percentage":59},{"alternativeId":"9368","percentage":26}],"promptToLogin":false,"questionManager":false,"articleId":"barrow-classification-of-caroticocavernous-fistulae"}