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Changes in physiological parameters of rat cerebrospinal fluid during chronic sampling: evaluation of two sampling
1Department of Neurology, University Hospital, Lund, Sweden.
Brain Research Bulletin
|August 1, 1991
Summary
This study compares rat cerebrospinal fluid (CSF) sampling methods. Chronic cannulation causes inflammation, while repeated punctures risk erythrocyte contamination, impacting physiological data.
Area of Science:
- Neuroscience
- Physiology
Background:
- Rat cerebrospinal fluid (CSF) is vital for pharmacological and biochemical research.
- Methodological studies on basic physiological data in rat CSF are lacking.
Purpose of the Study:
- To determine albumin content and cell counts (erythrocytes, leukocytes) in rat CSF.
- To compare two CSF sampling methods: chronic cannulation and repeated punctures from the cisterna magna.
Main Methods:
- CSF was collected from rat cisterna magna using either chronic cannulation or repeated punctures.
- Albumin concentration and erythrocyte/leukocyte counts were measured in the collected CSF samples.
Main Results:
- Initial CSF albumin content was 0.08 +/- 0.03 µg/µL.
- Chronic cannulation induced a meningeal reaction, increasing cell and albumin content, even with sterile cannulas.
- Leukocyte count strongly correlated with albumin content; erythrocyte contamination was higher with repeated punctures.
Conclusions:
- Chronic cisterna magna cannulation in rats causes inflammation, affecting CSF composition.
- Repeated puncture sampling avoids chronic inflammation but increases erythrocyte contamination risk.
- Careful consideration of sampling methods is crucial for accurate rat CSF physiological data in research.