An Improved Method for Intrathecal Catheterization in the Rat.
10.5625/lar.2010.26.4.393
- Author:
Young Chan JEONG
1
;
Young Bae KWON
Author Information
1. Department of Pharmacology, Institute for Medical Science, Chonbuk National University Medical School, Jeonju, Korea. 1972y@jbnu.ac.kr
- Publication Type:Original Article
- Keywords:
Intrathecal;
catheter;
lumbar;
lidocaine;
silicon bead
- MeSH:
Adhesives;
Animals;
Catheterization;
Catheters;
Diffusion;
Injections, Spinal;
Lidocaine;
Mandrillus;
Muscles;
Neck;
Rats;
Resins, Synthetic;
Silicones;
Spinal Cord;
Spinal Cord Injuries;
Spine;
Stainless Steel;
Subarachnoid Space;
Weight Gain
- From:Laboratory Animal Research
2010;26(4):393-397
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Catheterization of the subarachnoid space provides a useful tool to deliver drugs to spinal cord in rat. However, the passage of a long intrathecal catheter inserted via the cisterna magnum to lumbar spinal levels increases the risk of spinal cord trauma and the mislocation of catether into other places. Thus, present study was aimed to introduce direct subarachnoid catheterization of the rat lumbar spinal cord with novel shape of catheter. An intrathecal PE-10 catheter was fabricated with coil (four-time helix with 2 mm diameter) on either end and attached small silicon beads on both end of the coil. Using the silicon bead at insertion part as an anchorage, the catheter was advanced into the subarachnoid space until the silicon bead was embedded on a drilled hole over interspinous space between L4 and L5 vertebra. And then, silicon bead was tightly attached by surgical glue and dental resin with vertebra. Using the other side of silicon bead, catheter was tightly suturing with muscle layer. Finally, external portion of the catheter was placed into stainless steel protector on neck to reduce the damage by rat. Following this catheterization, it is not significantly affect the general physiology (i.e. motor function, weight gain and mechanical allodynia) of the rat without catheter loss over 2 weeks. Moreover, intrathecal injection either fluorescent dye or lidocaine further confirmed that drug diffusion site was appropriated for intended target.
