Abstract
Seventy-two mice were used to find out which of 13 vascular perfusion procedures gave best structural preservation of the spinal cord ependyma and central canal lumen. Best results were obtained by 3% glutaraldehyde in Tyrodes solution with 50% of normal NaCl amount, 0.06 M sucrose and 2% dextran T-40 (556 mOsmol, pH 7.2, 0–4°C). This was perfused by a peristaltic pump at 40 ml/min for 10 min through a cannula inserted in the ascending aorta. No advantage was seen by heparin pretreatment or adding a prefixation rinse. With good tissue preservation the central canal was found to be round to oval in cross-sectional profile and almost free of intraluminal material.
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