Cerebral ventricle cannulation in the calf.

Area of Science:

• Veterinary Surgery
• Neuroscience
• Surgical Instrumentation

Background:

• Chronic access to the cerebral ventricles is crucial for studying cerebrospinal fluid dynamics and for administering therapeutics.
• Previous methods may have limitations in terms of invasiveness or suitability for long-term studies in large animals.

Purpose of the Study:

• To describe a novel stereotaxic apparatus and surgical procedure for implanting guide cannulae into the cerebral ventricles of calves.
• To enable chronic cerebrospinal fluid collection and ventricular injections in conscious, nonanesthetized calves.

Main Methods:

• Development and application of a stereotaxic apparatus specifically designed for calf neuroanatomy.
• Surgical implantation of guide cannulae targeting the cerebral ventricles.
• Procedures for chronic cerebrospinal fluid collection and ventricular injections.

Main Results:

• Successful surgical implantation of guide cannulae into the cerebral ventricles of calves.
• Demonstration of the feasibility of chronic cerebrospinal fluid collection in milliliter quantities.
• Demonstration of the feasibility of chronic ventricular injections.
• The procedure was performed on nonanesthetized animals, minimizing physiological stress.

Conclusions:

• The described stereotaxic apparatus and surgical procedure provide a reliable method for chronic ventricular access in calves.
• This technique facilitates long-term research involving cerebrospinal fluid manipulation and analysis in a large animal model.
• The method is suitable for studies requiring repeated interventions in conscious, nonanesthetized animals.