Cisternostomy for Traumatic Brain Injury

One-Page Educational Information Sheet

What is Cisternostomy?

Cisternostomy is an advanced microsurgical neurosurgical procedure designed to treat patients with severe traumatic brain injury (TBI) and refractory brain swelling. The operation involves microsurgical opening of the basal cerebrospinal fluid (CSF) cisterns at the base of the brain, allowing restoration of normal CSF circulation and decompression of swollen brain tissue.

Unlike decompressive craniectomy, which creates space by removing a portion of the skull, cisternostomy aims to reduce intracranial pressure by re-establishing physiological CSF pathways.

Why is it Performed?

Following severe closed head trauma, intracranial pressure (ICP) may rise dramatically due to:

• Cerebral edema
• Traumatic subarachnoid hemorrhage
• Impaired CSF circulation
• Microvascular injury
• Brain swelling

Elevated ICP reduces cerebral perfusion, leading to secondary brain injury.

The goal of cisternostomy is to:

• Reduce intracranial pressure
• Improve cerebral blood flow
• Restore CSF dynamics
• Reduce brain edema
• Minimize secondary neuronal injury
• Potentially improve neurological outcomes

Surgical Principle

The operation is performed using modern microsurgical skull base techniques.

The surgeon carefully opens the basal cisterns, including regions around the:

• Opticocarotid cistern
• Chiasmatic cistern
• Carotid cistern
• Prepontine cistern
• Interpeduncular cistern

Opening these cisterns allows cerebrospinal fluid to drain freely, decreases pressure gradients within the brain, and may facilitate reverse movement of fluid from swollen brain tissue back into the normal CSF pathways.

Potential Advantages

Reported advantages include:

• Immediate reduction in intracranial pressure
• Better brain relaxation during surgery
• Preservation of normal skull anatomy (in selected patients)
• Reduced need for later cranioplasty
• Improved cerebral perfusion
• Shorter ICU stay in selected series
• Potential improvement in functional neurological recovery

Patient Selection

Cisternostomy is not appropriate for every patient with traumatic brain injury.

Potential candidates include carefully selected patients with:

• Severe closed head trauma
• Diffuse cerebral swelling
• Raised intracranial pressure
• Traumatic subarachnoid hemorrhage
• Basal cistern compression on CT imaging
• Failure of maximal medical therapy

Patient selection remains one of the most important determinants of outcome.

Current Evidence

Interest in cisternostomy has increased over the past decade, particularly through the work of Professor Iype Cherian and colleagues. Clinical studies from specialized centers have suggested encouraging results, including lower intracranial pressure, reduced mortality, and improved neurological outcomes in selected patients.

However, the procedure is technically demanding and requires advanced microsurgical expertise. While the early published experience is promising, larger multicenter prospective studies and randomized clinical trials are still needed to establish its role relative to standard decompressive craniectomy.

Key Surgical Requirements

Successful cisternostomy requires:

• Advanced skull base microsurgical training
• High-quality operating microscope
• Detailed knowledge of microsurgical anatomy
• Extensive experience with basal cistern dissection
• Modern neuroanesthesia and neurocritical care support

The Future

Cisternostomy represents one of the most innovative developments in modern neurotrauma surgery. As surgical techniques, imaging technologies, neuronavigation, intraoperative visualization, and artificial intelligence continue to evolve, this procedure may become an increasingly important component of the treatment strategy for carefully selected patients with severe traumatic brain injury.

Educational Note: Cisternostomy should be performed only by neurosurgeons with specialized microsurgical and skull base training, and within institutions equipped for comprehensive neurocritical care.