摘要:
Systems and the related methods for the pumping of fluids through a pump. The pump comprises a pump chamber (PPN), which is responsive to applied pressures to convey fluid. The systems and methods employ control measures, implemented through the controller (16), to monitor fluid flow through the pump, using either gravimetric (246) or electrical field sensing.
摘要:
A blood processing assembly (14) includes a separation element (12) for separating blood from a source into a first component and a second component. The assembly also includes a fluid path (18) that conveys blood between the source and the separation element. The fluid path includes one or more in-line cassettes (22A/B/C) that serve in association with peristaltic pumps to centralize pumping and valving functions of the system. The cassettes also serve to segregate the flow paths of the blood components from each other.
摘要:
A blood separation system for separating mono nuclear cells from whole blood is described. The system comprises a chamber (12) that is rotatable about a rotational axis (28). The chamber comprises first and second spaced apart walls (24, 26) that form a separation zone having a high-G side and a low-G side which is located closer to the rotational axis than the high-G side. The chamber also includes an inlet region (74) where whole blood enters the separation zone for separation into red blood cells (96), a plasma constituent carrying platelets (98), and an interface (58) carrying mono nuclear cells between the red blood cells and the plasma constituent. A plasma constituent collection region (76) is also provided in the chamber where the plasma constituent is collected for removal from the chamber. An outlet path (46, 206) communicates with the plasma constituent collection region (76) and provides for removal of the interface (58) from the chamber. The system is operated under the control of a controller (134) that is operable in first and second modes. In the first mode, whole blood is conveyed into the inlet region while red blood cells and the plasma constituent are removed from the chamber and while the interface (58) is maintained at a set location within the chamber. In the second mode, the controller operates to move the interface from the set location for removal from the chamber via the outlet path. Finally, the system is equipped with a sensing element (226) for detecting mono nuclear cells in the interface in the outlet path. A method of separating mono nuclear cells from whole blood is also described.
摘要:
Systems and methods recommend storage parameters for a prescribed number of platelets in a prescribed gas permeable container and in association with a specified storage medium. The systems and methods receiving as input selected storage criteria information. The systems and methods generate as output, based upon the selected storage criteria information received, recommended storage parameters comprising a recommended number of selected storage containers (PltBAG) to be used and a recommended volume of storage medium (PltMED) to be used.
摘要:
A method for separating platelets from a platelet-rich suspension comprising rotating a separation zone about an axis (14) at a given angular velocity (Φ), the separation zone including a low-G side (16) located closer to the rotational axis (14) than the other, high-G (18) to create between them a chamber (10) having a radial thickness (h) and an axial height (Z) measured with respect to the axis (14) of rotation, and an inlet (20) for introducing a platelet-rich suspension and the separation zone establishing a relationship between the radial thickness (h) and the axial height (Z) of the chamber (10) that taking into account the given angular velocity of rotation (Φ) and the given kinematic viscosity (v) of the platelet-rich suspension introduced through the inlet (20), represents a value (μ) that is less than 700, where μ = (2h3)/(Z).
摘要:
A peristaltic pump tube holder (22A/B/C) has a body (110) having first and second pump ports extending outside of it. The pump ports extend at an acute angle to receive a flexible tubing loop (134/136) and orient the tubing loop for engagement with an external pump rotor (292).
摘要:
An umbilicus (24) conveys fluid between a stationary body and a rotating body in a small, compact operating environment. The umbilicus comprises an elongated body (200) including a proximal end, a distal end, and a middle region between the proximal and distal ends. A first support block (204) is attached to the proximal end. A second support block (206) is attached to the distal end. The first support block (204) includes a strain relief sleeve (212). The umbilicus is otherwise free of any other strain relief sleeve. A thrust bearing member (214) in the middle region spaced apart from the strain relief sleeve (212) and the distal end. The umbilicus is otherwise free of any other thrust bearing member. The thrust bearing member (214) has an inner annular body (218), an outer annular body (216) about the inner annular body (218), and an array of ball bearings (220) between the inner and outer annular bodies. The ball bearings (220) support the inner annular body (218) for rotation relative to the outer annular body (216).
摘要:
Un système (234), conçu pour surveiller la zone d'interface entre les constituants cellulaires et le plasma dans une chambre de séparation (80) utilise un mécanisme détecteur (236) conçu pour dégager de l'énergie dans la zone d'interface; cette énergie étant absorbée par les constituants cellulaires. Le mécanisme détecteur (244) détecte également l'intensité de l'énergie qui n'est pas absorbée par la zone d'interface, de manière à générer un signal de sortie caractéristique de l'intensité non-absorbée. Le système (234) déplace la zone d'interface par rapport au mécanisme détecteur pendant un temps déterminé. Un premier circuit (268) mesure les variations du signal de sortie caractérisant l'intensité non-absorbée pendant le temps déterminé et génère une sortie fonction du temps. Un second circuit (270) peut dériver la dimension physique de la zone d'interface basée sur la sortie fonction du temps.