{'fraction_non_alphanumeric': 0.032116788321167884, 'fraction_numerical': 0.040875912408759124, 'mean_word_length': 5.471698113207547, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Intracranial Vascular Disease : Anesthetic Concerns and Management

Who has a cerebral aneurysm and what happens to them? Intracranial aneurysms are saccular dilatations that occur most commonly at bifurcation points of the major intracranial cerebral vessels. The prevalence in North America is estimated to be 2,000 per 100,000 (1:50!!) with an annual incidence of subarachnoid hemorrhage (SAH) from rupture of 12 per 100,000, although the recently published International Study of Unruptured Intracranial Aneurysms (ISUIA) found a much lower incidence of rupture, especially for small lesions. SAH occurs most commonly between the ages of 40-60 with a female preponderance of 1.6:1.