title: Electronic counting of spinal fluid cells.
abstract: An analysis of the electronic counting of leukocytes in cerebrospinal fluid (CSFLpc) was made theoretically in models and in patients. At spinal fluid dilutions of 1/500, 1/50, 1/25, and 1/2, linearity was obtained by electronic counting down to 1,000, 100, 20, and 2 Lpc (10(6)/L), respectively. The electronic particle counters produce satisfactory results at Lpc greater than 100 (10(6)/L) but need modifications to produce satisfactory results at Lpc less than 100 (10(6)/L). It is theoretically possible to reduce the variation nine times by electronic counting as compared with microscopic counting. A method for the correction of blood admixture at traumatic spinal puncture by electronic counting was shown to be satisfactory.
mesh_terms: D002555:Cerebrospinal Fluid / Q000166:cytology*; D004582:Electronics, Medical / Q000379:methods; D006801:Humans; D008853:Microscopy / Q000379:methods; D008954:Models, Biological; D013129:Spinal Puncture