System for blood separation with shielded extraction port and optical control

摘要

A centrifugal blood separation system comprising a rotor, a light source, an optical sensor, a control system, a separation vessel, and an optical cell on the separation vessel. The optical cell has a first extraction port extending radially outwardly into the optical cell, a red blood cell extraction port downstream from the first extraction port and extending into the optical cell beyond the first extraction port; and a dam between said first extraction port and said red blood cell extraction port, having an upper edge and a lower edge, wherein the first extraction port and the red cell extraction port are radially between the upper edge and the lower edge of the dam. Also, a first extraction port having a bore having a first diameter, a lumen having a second diameter smaller than the first diameter, and a frustro-conical passageway coupling the bore to the lumen.

主权项

1. An optical cell for a separation chamber of a density centrifuge blood processing system for separating fluid components, said optical cell being adapted to be mounted on a rotor of said blood processing system, said optical cell comprising:
an extraction chamber adapted to transmit at least a portion of an incident optical beam; and a first extraction port extending radially outwardly into said optical cell with respect to an axis of rotation of said rotor and being adapted to transmit at least a portion of the incident optical beam, said first extraction port having
an orifice opening into said extraction chamber,a bore for passing fluid components, said bore being adjacent said orifice of said first extraction port, said bore having a first diameter,a lumen in fluid communication with said bore and downstream therefrom with respect to fluid flowing through said bore into said lumen, said lumen having a second diameter smaller than said first diameter of said bore, anda frustro-conical passageway smoothly coupling said first diameter of said bore to said second diameter of said lumen.