Patent ID: 6010909
Filing Date: 2000-01-04
Classification: C12M,G01N,Y10T

Abstract:
A cytological method for determining a measure responsive to the number of cells in a liquid medium, said method comprising the steps ofA. providing a flow path for a liquid medium with cells carried therein across a filter device that blocks cells larger than a selected threshold size and passes smaller cells,B. applying a selected fluid signal to the flow path for at least a selected time, for producing flow of the liquid medium through said filter device, said signal-applying step including applying a succession of seleted signal pulses to the fluid,C. measuring, in response to each of selected ones of said signal pulses, a parameter responsive to the change in flow through said filter device, andD. determining a selected change in said measured parameter responsive to the change in obstruction of said filter device by cells larger than said threshold size, during said selected time.