A blood processing apparatus (1) comprises a measurement device (8) having at least one chamber element (80, 81) for receiving a blood fluid, wherein the at least one chamber element (80, 81) extends along a longitudinal axis (L) and comprises a circumferential wall (804, 814) extending about the longitudinal axis (L), a bottom wall (803, 813) and a top wall (805, 815) together defining a flow chamber (802, 812), the at last one chamber element (80, 81) further comprising an inlet port (800, 810) for allowing a flow of a blood fluid into the flow chamber (802, 812) and an outlet port (801, 811) for allowing a flow of a blood fluid out of the flow chamber (802, 812). The blood processing apparatus (1) further comprises a holder device (9) for holding the measurement device (8), the holder device (9) comprising a base (90) having a reception opening (900) for receiving the measurement device (8) and a closure element (91) movably arranged on the base (90) for locking the measurement device (8) in an inserted position in the reception opening (900). An ultrasonic sensor element (92, 93) of the holder device (9) is arranged on the base (90) and adapted to produce an ultrasonic sensor signal (P) for measuring a haematocrit value of a blood fluid in the flow chamber (802, 812). Herein, the ultrasonic sensor element (92, 93), in the inserted position of the measurement device (8), faces the bottom wall (803, 813) of the at least one chamber element (80, 81) for transmitting the ultrasonic signal (P) into the flow chamber (802, 812) through the bottom wall (803, 813). In this way a blood processing apparatus comprising a holder device for a measurement device is provided which allows to easily insert the measurement device into the holder device and allows for a reliable measurement of, in particular, a haematocrit value of a blood flow through the measurement device.

A tubing set for use in a blood processing apparatus comprises a measurement device (8) having at least one chamber element (80, 81) for measuring a haematocrit value of a blood fluid, wherein the at least one chamber element (80, 81) extends along a longitudinal axis (L) and comprises a circumferential wall (804, 814) extending about the longitudinal axis (L) and encompassing a flow chamber (802, 812), the at last one chamber element (80, 81) further comprising an inlet port (800, 810) for allowing a flow of a blood fluid into the flow chamber (802, 812) and an outlet port (801, 811) for allowing a flow of a blood fluid out of the flow chamber (802, 812). The tubing set furthermore comprises an inlet-side tube section (21, 31) connected to the inlet port (800, 810) and an outlet-side tube section (22, 30) connected to the outlet port (801, 811). Herein, the inlet port (800, 810) and the outlet port (801, 811) are arranged on the circumferential wall (804, 814) and are displaced with respect to each other along the longitudinal axis (L). In this way a tubing set comprising a measurement device is provided which in an easy and reliable manner allows for the measuring of a haematocrit value of a blood fluid.

Method and apparatus for controlling the dialysate flow in a dialysis device. A change of the value of a control factor, caused by a variation of a property of the dialysate or of the blood or by a change of the dialysate flow, is determined in order to control the dialysate flow. The control factor is a measure for the exchange of substances via the dialyzer and thus the effectiveness of the dialyzer. If the change of the value of the control factor exceeds a limit, the dialysate flow is increased. On the other hand, the dialysate flow is reduced if the change of the value of the control factor falls short of the limit range.

Disclosed herein are methods, systems and devices to monitor vascular volume status utilizing at least one oximetry/photoplethysmography sensor. The methods, systems and devices provide an alternative to conventional vascular volume monitoring methods while enabling reliable, non-invasive, and automatic monitoring of vascular volume to avert patient hypotension. The methods, systems and devices may be employed in the context of both inpatient and outpatient facilities and may also be incorporated into conventional monitoring devices, techniques and equipment.

This disclosure relates to medical fluid sensors and related systems and methods. In certain aspects, a nuclear magnetic resonance device includes a support frame, a first magnet connected to the support frame, a second magnet connected to the support frame in a manner such that the second magnet is disposed within the magnetic field of the first magnet and a magnetic attraction exists between the first magnet and the second magnet, and a spacer disposed between the first magnet and the second magnet. The spacer is configured to maintain a space between the first magnet and the second magnet.

A method and device for determining the concentration of blood constituents, in particular haemoglobin, in a hose line of an extracorporeal blood circuit of an extracorporeal blood treatment apparatus, and an extracorporeal blood treatment apparatus with a device for determining the concentration of a blood constituent, are based on the correction of the influence of the blood flow rate of the blood flowing through the hose line on the determination of the concentration of the blood constituent. The device comprises a computing and evaluation unit configured such that a correction factor is ascertained for the influence of the blood flow rate on the determination of the concentration of the blood constituent. The concentration of the blood constituent is then determined based on a relationship describing the dependence of the concentration of the blood constituent on the intensity of the decoupled electromagnetic radiation, taking account of the correction factor.

Systems and methods are provided for determining an estimated risk of arrhythmia during or after dialysis based on changes in serum potassium concentration of a patient and an amount of fluid removed from the patient during dialysis. The systems and methods allow for a determination of a risk that arrhythmia will occur due to the changes in potassium and fluid volume of a patient during dialysis, and for optimizing a dialysis prescription in order to minimize the risk of arrhythmia.

A blood loop system for controlling blood oxygen saturation includes a conduit loop, a pump, a flow cell, a matter source, an aeration chamber, a collection chamber and an oxygen probe. The pump is coupled to the conduit loop and positioned to circulate blood through the conduit loop. The flow cell is positioned to measure a characteristic of the blood circulated through the conduit loop. The matter source includes a gas. The aeration chamber is coupled to the conduit loop and is in fluid communication with the matter source to enable the gas to combine with the blood. The collection chamber is in fluid communication with the aeration chamber and is positioned to receive the blood. The oxygen probe is positioned to measure an amount of oxygen in the blood.

An apparatus for extracorporeal treatment of fluid and a process of setting up a medical apparatus for the delivery or collection of fluids are disclosed. According to the apparatus and the process, a control unit (10) is configured calculate set values of two or more of the fluid flow rates by imposing that an emptying time of containers of fresh fluid (16, 20, 21, 26) and/or a filling time of a waste container is substantially same as, or multiple of, the emptying time of one or more of the other containers of fresh fluid.

A blood filtration system can reduce the amount of plasma constituents (e.g., water and/or electrolytes) in the blood of the patient, and accordingly increase the hematocrit value of the patient. The blood filtration system (e.g., a controller, or the like) can determine a hematocrit value of a patient. The blood filtration system can determine a venous pressure of vasculature of a patient. The blood filtration system can compensate for pressure head in a component of a blood circuit (e.g., a withdrawal line of a catheter), for example to improve the accuracy of the venous pressure determination. The blood filtration system can determine one or more resistance characteristics of a blood circuit for the blood filtration system. The resistance characteristics can correspond to a resistance to a flow of blood through a component of the blood circuit.