Bonnet bypass in multiple cerebrovascular occlusive disease

Area of Science:

• Neurosurgery
• Vascular Surgery
• Neurology

Background:

• Multiple cerebrovascular occlusive disease poses significant challenges for surgical revascularization.
• Standard extracranial-to-intracranial bypasses, such as superficial temporal artery-to-middle cerebral artery (STA-MCA) bypass, may not always be feasible due to unavailable ipsilateral donor vessels.

Observation:

• This study discusses the rationale and technique of the bonnet bypass procedure in two cases of multiple cerebrovascular occlusive disease.
• Cerebral revascularization was performed using radial artery or brachiocephalic vein interposition grafts.

Findings:

• The bonnet bypass technique successfully achieved cerebral revascularization in these selected cases.
• This alternate bypass proved effective when ipsilateral extracranial donor vessels were unavailable for classic STA-MCA bypass surgery.

Implications:

• The bonnet bypass is a viable alternative for cerebral revascularization in specific patient populations with complex cerebrovascular disease.
• The procedure demonstrates potential for clinical and hemodynamic improvement, supporting its consideration for treating cerebral ischemia and stroke prevention.
• Beyond its use in skull base tumor surgery, the bonnet bypass may play a role in managing ischemic stroke risk.