Improved method for cannula fixation for long-term intracerebral brain infusion

Area of Science:

• Neurosurgery
• Biomedical Engineering
• Drug Delivery Systems

Background:

• Implanted osmotic minipumps are vital for long-term, brain-targeted delivery of experimental agents.
• Accurate cannula placement is critical during stereotactic surgery for precise drug delivery.
• Current fixation methods struggle with the skull's curved surface, leading to instability and experimental failure.

Purpose of the Study:

• To develop an improved method for securely fixing cannulas during stereotactic surgery.
• To address the limitations of existing fixation techniques for intracranial infusions.
• To enhance the reliability and reproducibility of long-term brain infusion experiments.

Main Methods:

• Development of a custom-shaped silicone spacer as a fixation adapter for cannula holders.
• Utilizing the spacer to conform to the skull's curvature for a more stable fit.
• Describing the production and application of the silicone spacer in laboratory settings.

Main Results:

• The silicone spacer provides a secure and stable fixation for cannulas on curved skulls.
• The method prevents leakage and movement of the cannula, ensuring accurate drug delivery.
• Fast and reliable production of the skull-shaped silicone spacer is demonstrated.

Conclusions:

• The novel silicone spacer significantly improves the fixation of intracerebral catheters for stereotactic brain infusion.
• This easy-to-produce adapter enhances the security and reproducibility of long-term infusion experiments.
• The improved fixation minimizes risks of leakage, cannula dislodgement, and brain tissue damage.