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Chronic catheterization of the subarachnoid space of rats is an important tool for intrathecal drug delivery in pharmacologic investigations of pain. We describe a technique using direct lumbar insertion of a small 32-gauge polyurethane (PU) catheter without extensive surgery. Location of the catheter was confirmed with 2% lidocaine injection 1 day later, and methylene blue injection after 7-14 days. This method improved recovery of the rat after catheter implantation and reduced neurologic complications.
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Pogatzki et al. (2000) studied this question.
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