Related Experiment Video
Updated: May 10, 2026

06:59
Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
Published on: February 29, 2020
Case-specific protocol to reduce cerebrospinal fluid leakage after endonasal endoscopic surgery
Kunal S Patel1, Ricardo J Komotar, Oszkar Szentirmai
1Departments of Neurosurgery, Weill Cornell Medical College, NewYork-Presbyterian Hospital, New York, New York 10065, USA.
Journal of Neurosurgery
|June 4, 2013
Summary
The Cornell closure protocol for endoscopic transsphenoidal surgery achieved a 0% postoperative cerebrospinal fluid (CSF) leak rate. This standardized algorithm offers a solution for centers struggling with CSF leaks after skull base procedures.
Area of Science:
- Neurosurgery
- Skull Base Surgery
- Endoscopic Procedures
Background:
- Postoperative cerebrospinal fluid (CSF) leaks are a significant concern following endoscopic transsphenoidal surgery.
- Existing closure techniques present challenges, leading to variable leak rates.
Observation:
- A single, standardized closure algorithm, the Cornell protocol, was implemented for endoscopic transsphenoidal surgeries starting in January 2010.
- A prospective database tracked intraoperative CSF leaks, closure methods, and postoperative outcomes.
- A MEDLINE search was conducted to compare institutional leak rates with published data.
Findings:
- In a cohort of 209 patients, 125 experienced intraoperative CSF leaks (60%), including 35 high-flow leaks.
- The Cornell protocol resulted in zero (0%) postoperative CSF leaks among all patients, regardless of intraoperative leak presence or severity.
- This represents a significant reduction in CSF leak rates compared to previously reported data.
Implications:
- The Cornell closure protocol demonstrates the potential to achieve a 0% postoperative CSF leak rate in endoscopic skull base surgery.
- This standardized approach can empower surgical centers to effectively manage and reduce CSF leak complications.
- Endoscopic skull base surgery, when employing this protocol, can be considered to have comparable or lower CSF leak rates than traditional open or microscopic techniques.

