___ was auf die geringe Zellausbeute besonders kleiner Zellen (z.B. Lymphozyten) zurückgeführt werden kann. Damit erscheint das Hettich-Zytozentrifugenverfahren mit angereicherten Liquorproben und zugesetztem Albumin in Serumkonzentration für eine quantitative Liquorzytologie in der Routine geeignet. Mit diesem Verfahren wird durch Vorzentrifügation der Liquorprobe nativerzellfreierLiquorfür weitere Untersuchungen gewonnen, was mit den .anderen hier beschriebenen Verfahren nicht möglich ist. Schlüsselwörter: Liquor cerebrospinalis -Liquorzytologie -Zytozentrifugation -Sedimentkammer -Sorptionsringkammer -Zellausbeute -Differentialzellbild -Zelldarstellung Summary:Cell yield, cellular differential and cytomorphology of leukocytes were determined with three different Sedimentation procedures described by Sayk, respectively with three ' cytocentrifuge modifications, and the tesults were compared: The cell yield (median) was 9% in CSF cell samples with Iow cell counts (median: 3,500 leukocytes per ml) applying the Sedimentation technique after Sayk; applying the sorption ring chamber forspontaneous cell Sedimentation after Sayk with or withoutcentrifugation, it was 4%, respectively 11 % with blood leukocytes suspended to 3,200 leukocytes per ml (median) in a 0.5 g/l albumin solution; however, higher yields of disrupted cells were found. The highest cell yield (median) of 47% and < 5% disrupted cells were obtained with the Lab.med. 18: 91 (1994) 91 Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/10/15 8:39 PM
OriginalieHettich-cytocentrifuge procedure using precentrifuged CSFsamples suspended in a 50 g/l albumin solution. It was 20% with suspended blood leukocytes applying the Hettichcytocentrifuge procedure to non-concentrated samples and 4% applying the Shandon cytocentrifuge each yielding 7% ofdisruptedcells. Cellular differential (medians) in CSF exhibited 83% lymphocytes and 14% monocytes applying the Hettich-cytocentrifuge procedure and precentrifuged CSF samples of Iow cell counts; it was similar to the "true" distribution of CSF cells described by Sörnäs 1972. Cytomorphology in CSF samples corresponds to that of blood smears applying the Hettich-cytocentrifuge procedure described here in contrast to the otherknown prpcedures. The Sedimentation technique after Sayk exhibits distortions ofthe CSF cell distribution showing relatively more monocytes and fewer lymphocytes because ofthe Iow cell yield. Therefore, the Hettich-cytocentrifuge procedure using concentrated CSFsamples with addedalbumin ofserum concenträtion appears to be suitable for a quantitative CSFcytology for the daily routine. Moreover, the procedure allows to collect cell-free CSF for further investigations by precentrifugation of CSFsamples in contrast to the other procedures described here.