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Original Article

Method for Long-Term Cerebrospinal Fluid Collection in the Conscious Dog

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Pages 207-214 | Received 20 Nov 1997, Accepted 15 Apr 1998, Published online: 09 Jul 2009
 

Abstract

In medical research there is often a need for cerebrospinal fluid (CSF) collection from conscious animals. A number of models have been published, but long-term use is often limited by factors such as damage to implant or loss of patency. When part of an implant is exteriorized, group housing is often not possible; even when singly housed, the instrumented animals might have to be fitted with protective devices such as collars, vests, or helmets. Over the last 10 years we have, through the use of this technique, managed to perform repeated CSF collections in 12 beagles. Time of implant duration has ranged from 2.3 to 6.8 years. The method uses two permanent stainless steel guide cannulas screwed into the parietal bone, positioned above but not penetrating the lateral ventricles of the brain. At the time of collection, one of the subcutaneous stainless steel cannulas is used to serve as a guide for a 20-gauge collection needle. The collection is performed under local analgesia and with minimal discomfort to the dog. With its long-term use, we feel that this model is very useful and of high ethical and welfare standards due to the virtual lack of postoperative complications, maintenance requirements, and housing restrictions.

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