An optical measurement device is provided with: a light source that irradiates, with light, a measurement object which has a fluid flowing thereinside; a light receiving unit which, upon receipt of scattered light from the measurement object irradiated with light, outputs a light reception signal according to the intensity of the scattered light; a disturbance generation unit which generates a disturbance signal for causing oscillation of a drive current to be supplied to the light source; and an adjustment unit which adjust the drive current on the basis of the result of a comparison between the disturbance signal and a signal generated on the basis of the light reception signal.

A blood pressure prediction method and an electronic device using the same are provided. The method includes the following steps. A training data set is collected. A first blood pressure prediction model is established according to the training data set. Hemodialysis parameter data of a target patient is received, wherein the hemodialysis parameter data includes a first hemodialysis parameter at a previous time point and a second hemodialysis parameter at a current time point. A hemodialysis parameter variation amount between the first hemodialysis parameter and the second hemodialysis parameter is calculated. The hemodialysis parameter variation amount is provided to the first blood pressure prediction model to generate a prediction blood pressure variation associated with a next time point. An operation is performed according to the prediction blood pressure variation of the target patient.

An optical sensor device configured for use in combination with a fluid flowing through a tubing, the optical sensor device includes a light source configured to emit a light, with at least a portion of the light being exposed to a fluid in the tubing and reflected, an optical sensor configured to receive at least a portion of the reflected light and analyze at least a portion of the received reflected light to determine a reflectance measurement, and a controller configured to correlate the reflectance measurement to an input particulate level and generate an output indicative of the fluid flow rate corresponding to the reflectance measurement. Also disclosed is a method of optically measuring fluid flow rate in a fluid processing system including optically monitoring fluid flow through a transparent portion of a tubing by measuring light reflectance of particles in the fluid.

Provided is an extracorporeal circulator capable of judging a timing suitable for detachment with high accuracy. The extracorporeal circulator includes a blood removal side catheter with a part that can be inserted into a patient and guide the blood taken from the patient; a pump that can take the blood from the patient and return the blood to the patient; a blood transfer side catheter provided downstream of the pump, and that has a part that can be inserted into the patient and guide the blood sent out from the pump back into the patient; a pump rotation speed detection unit that can detect a rotation speed of the pump; and a control system including at least one of an extracorporeal circulation management system that can judge stability of the extracorporeal circulation and a cardiac function measurement system that can judge stability of a heart function of the patient.

This disclosure relates to a medical device including a hard part and a converter. The hard part has fluid paths for conducting a medical fluid through the hard part. The converter is arranged to measure a characteristic of the medical fluid while the medical fluid is present in one of the fluid paths. At least a section of the converter is applied or superimposed to the hard part by at least one additive application method.

A system and method for identifying a disruption of a flow from an extracorporeal circuit to a patient circulatory system is based on flow rate data, such as from a venous line of the extracorporeal circuit. A patient contribution to the flow rate data is identified and monitored to assess a disruption of the extracorporeal circuit and the patient circulatory system, or access device. A spectrum analysis can be performed on the flow rate data to identify a harmonic corresponding to the patient contribution, wherein a change in or disappearance of the identified harmonic can be used to identify a disruption of the flow.

A system and method for identifying a disruption of a flow from an extracorporeal circuit to a patient circulatory system, such as a venous needle dislodgement or an access-bloodline separation, is based on flow rate data of the extracorporeal circuit. A patient contribution to the flow rate data can be identified as a harmonic and monitored to assess the presence of the disruption. The system can identify an inharmonic change, such as a spike, in the flow rate in the extracorporeal circuit, wherein the inharmonic change can be used alone or in conjunction with the identified harmonic to assess the existence of the disruption. The system can employ the spike in a blood flow rate as well as a spike in a dialysate flow rate fluidly connected to the extracorporeal circuit, wherein the spike can be used to identify the disruption.

The disclosed subject matter relates to extracorporeal blood processing or other processing of fluids. Volumetric fluid balance, a required element of many such processes, may be achieved with multiple pumps or other proportioning or balancing devices which are to some extent independent of each other. This need may arise in treatments that involve multiple fluids. Safe and secure mechanisms to ensure fluid balance in such systems are described.

A control system for a perfusion system (1), the control system being configured to control a plurality of blood flow rates in the perfusion system during a weaning phase. The perfusion system comprises: a first blood line (26) in which blood is permitted to flow at a first flow rate; a second blood line (34) in which blood is permitted to flow at a second flow rate; an arterial blood line (22) in which blood is permitted to flow at an arterial flow rate; and an arterial pump (20) configured to circulate blood at the arterial flow rate in the arterial blood line. The control system comprises a controller configured to determine the first flow rate and the second flow rate and to process the first and second flow rates to determine a desired arterial flow rate. The controller is configured to operate in a first mode in which the controller modulates operation of the arterial pump (20) to adjust the arterial flow rate so that the arterial flow rate matches the desired arterial flow rate.

The present invention relates to a flow sensor for measuring a flow difference having at least two measurement chambers through which fluid is conductible; at least one means for producing a magnetic field for charge separation in a fluid flowing through the at least two measurement chambers; and at least one means for measuring an electric potential in the fluid flowing through the at least two measurement chambers, with the at least two measurement chambers being arranged such that they are run through by the same magnetic field line of the magnetic field for charge separation.