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Updated: May 24, 2025

A Modified Method for Intrathecal Catheterization in Rats

A Modified Method for Intrathecal Catheterization in Rats

Published on: February 14, 2025

A Modified Method for Intrathecal Catheterization in Rats.

Lijun Yin¹, Quan Zhou², Wenwu Liu³

¹Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Clinical Research Center for Anesthesiology and Perioperative Medicine, Translational Research Institute of Brain and Brain-Like Intelligence, Department of Anesthesiology and Perioperative Medicine, Shanghai Fourth People's Hospital, School of Medicine, Tongji University; Department of Anesthesiology, Women and Children's Hospital of Ningbo University.

Journal of Visualized Experiments : Jove

|March 3, 2025

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This study presents a modified intrathecal catheterization technique in rats, enhancing success rates and catheter longevity for neuropathic pain research. The improved method ensures reliable drug delivery and minimizes tissue damage.

Area of Science:

Neuroscience
Surgical Techniques
Pharmacology

Background:

Intrathecal catheterization is crucial for animal models of neuropathic pain.
Traditional methods have limitations affecting success rates and animal welfare.
Existing modifications require further refinement for optimal application.

Purpose of the Study:

To introduce a novel, modified method for reliable intrathecal catheterization in rats.
To improve catheter stability, reduce tissue damage, and enable prolonged drug administration.
To enhance the success rate and durability of intrathecal catheters in preclinical research.

Main Methods:

A modified technique using a stainless-steel wire within a PE10 tube for increased elasticity and maneuverability.

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Implementation of a self-made sealing cap to prevent cerebrospinal fluid leakage and simplify catheter maintenance.

Secure fixation with a figure-8 suture and an anti-allergic band to prevent catheter dislodgement.

Main Results:

The modified method significantly improved the success rate of intrathecal catheterization.
Catheters remained in place for up to 28 days in approximately 80% of cases, demonstrating long-term stability.
The technique minimized damage to surrounding tissues and reduced operational space requirements.

Conclusions:

The modified intrathecal catheterization method is simple, convenient, and reliable for rats.
This technique facilitates repetitive intrathecal drug administration in preclinical studies.
The improved method offers a valuable advancement for neuropathic pain research and other applications.