Internal carotid artery bifurcation aneurysms: surgical experience.
Internal carotid artery (ICA) bifurcation aneurysms are relatively uncommon and frequently rupture at a younger age compared to other intracranial aneurysms. We have treated a total of 999 patients for intracranial aneurysms, of whom 89 (8.9%) had ICA bifurcation aneurysms, and 42 of the 89 patients were 30 years of age or younger. The present study analyzed the clinical records of 70 patients with ICA bifurcation aneurysms treated from mid 1997 to mid 2003. Multiple aneurysms were present in 15 patients. Digital subtraction angiography films were studied in 55 patients to identify vasospasm and aneurysm projection. The aneurysm projected superiorly in most of these patients (37/55, 67.3%). We preferred to minimize frontal lobe retraction, so widely opened the sylvian fissure to approach the ICA bifurcation and aneurysm neck. Elective temporary clipping was employed before the final dissection and permanent clip application. Vasospasm was present in 24 (43.6%) of 55 patients. Forty-eight (68.6%) of the 70 patients had good outcome, 14 (20%) had poor outcome, and eight (11.4%) died. Patients with ICA bifurcation aneurysms tend to bleed at a much younger age compared to those with other intracranial aneurysms. Wide opening of the sylvian fissure and elective temporary clipping of the ICA reduces the risk of intraoperative rupture and perforator injury. Mortality was mainly due to poor clinical grade and intraoperative premature aneurysm rupture.
Gupta
Sunil Kumar
SK
Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India. drgupta_sk@yahoo.com
Khosla
Virender Kumar
VK
Chhabra
Rajesh
R
Mohindra
Sandeep
S
Bapuraj
Jaipali Rajeev
JR
Khandelwal
Niranjan
N
Mukherjee
Kanchan Kumar
KK
Tewari
Manoj Kumar
MK
Pathak
Ashis
A
Mathuriya
Suresh Naraian
SN
D000328:Adult; D000783:Aneurysm / Q000175:diagnosis / Q000601:surgery*; D002340:Carotid Artery Diseases / Q000175:diagnosis / Q000601:surgery*; D002343:Carotid Artery, Internal; D006801:Humans; D012189:Retrospective Studies; D016896:Treatment Outcome