Comparison of atlantoaxial and lumbosacral cerebrospinal fluid centesis techniques in South American camelids

Author:

Malmström Ester12,Cole Robert C.2,Hofmeister Erik H.2,Stern Jere K.3,Passler Thomas2ORCID

Affiliation:

1. Department of Forestry and Wildlife Management Inland Norway University of Applied Sciences Evenstad Norway

2. Department of Clinical Sciences, JT Vaughan Large Animal Teaching Hospital, College of Veterinary Medicine Auburn University Auburn Alabama USA

3. Department of Pathobiology, College of Veterinary Medicine Auburn University Auburn Alabama USA

Abstract

AbstractBackgroundIatrogenic blood contamination during cerebrospinal fluid (CSF) centesis is common, which can limit the diagnostic usefulness of the sample. A novel ultrasound‐guided CSF collection technique is described in horses, by which CSF is obtained from the atlantoaxial (AA) space.Hypothesis/ObjectivesTo compare ultrasound‐guided AA centesis with lumbosacral (LS) centesis in South American camelids (SAC). The hypotheses were that AA centesis would yield samples with less blood contamination although being technically more challenging than LS centesis.AnimalsEight clinically healthy adult SAC from a university‐owned teaching herd.MethodsSingle‐blinded, randomized, 4‐way, 4‐period crossover study in which 2 veterinarians each performed both centesis techniques on each animal once. Cytological sample analysis was performed, and the technical difficulty of sample acquisition was assessed.ResultsThe CSF was collected successfully and without complications by either technique during all collection attempts. Aspects of technical difficulty and concentrations of CSF analytes did not vary significantly between techniques. Median total nucleated cell and red blood cell counts were 1/μL and 0.5/μL and 167.5/μL and 155/μL for AA and LS techniques, respectively. The median total protein concentration was 32.9 mg/dL and 38 mg/dL for AA and LS centeses. A median of 1 attempt was necessary for both centesis techniques and the median number of needle repositioning events was 1 for AA and 0 for LS.Conclusion and Clinical ImportanceDepending on clinical circumstances, ultrasound‐guided AA centesis appears to be an acceptable alternative to other techniques for collection of CSF from SAC.

Funder

College of Veterinary Medicine, Auburn University

Publisher

Wiley

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