One of the most significant safety concerns in the automation of extracorporeal blood treatments such as dialysis is the risk of blood leakage. Extracorporeal blood treatment systems draw blood at such a high rate that a loss of integrity in the blood circuit can be serious. There are a number of mechanisms for detecting and preventing leaks, but none is perfect. This tends to limit the use of such equipment in unsupervised settings, such as the home will be limited. Some leak detection schemes can be made sensitive enough to detect the barest of leaks, but when this is done, they result in too many false positives. The invention combines information from multiple inputs to enhance sensitivity in leak detection and reduce the problem of false positives.

An air bubble sensor has a holder at which at least one ultrasonic sensor is arranged to detect air bubbles and/or gas bubbles in a flowing liquid, wherein a flow passage which has connection pieces is integrated into the holder.

Apparatus and methods for providing extracorporeal blood circulation and oxygenation control include multi-stage deairing of blood to provide automated cardiopulmonary replacement to sustain patient life during a medical procedure such as cardiopulonary bypass graft surgery, keyhole cardiopulmonary bypass graft surgery, percutaneous angioplasty, percutaneous stent placement, and percutaneous atherectomy.

The present specification describes systems and methods for detecting an occlusion in a tubing carrying a patient's blood through a manifold and into a dialyzer in a dialysis system. A controller measures pressures value of the blood at a predetermined point after exiting the manifold and before entering the dialyzer, calculates a historical running average, calculates a weighted sum of the most recent pressure values, and determines whether to trigger an occlusion alarm based on a function of the historical running average and the weighted sum of the most recent pressure values.

A fluid flow sensing and bubble detecting apparatus, comprising:—housing provided with a cavity configured to receive a tube through which conductive fluid flows;—a fluid flow sensing and bubble detecting electrical sensor assembly supported by the housing and configured to sense the flow of the fluid flowing through the tube and to detect bubbles in the fluid; and—an electrically grounded Electro-Magnetic Interference (EMI) shielding arranged between at least a part of the sensor assembly and the cavity such that the EMI shielding protects the sensor assembly from unwanted EMI emanating from a tube received within the cavity, which might otherwise cause the fluid flow sensing and bubble detecting apparatus to generate false bubble detection signals.

A system with container volume tracking includes a pump receiving a line connected to a tracked container, an air sensor to detect air in the line, and a controller coupled to pump and sensor. The controller is configured to monitor pump operation, and determine a volume removed from the container based thereon. If the volume removed is less than a first percentage of a target volume and there is air, continue operation after an air purge. If the volume removed is more than the first percentage and less than a second percentage and if there is air, prompt the user for an input, and continue operation after an air purge if a first input is received or end operation if a second input is received. If the volume removed is more than the second percentage and if there is air, end operation.

The present disclosure includes systems and methods for hemodialysis, such as including a first dialysis module and an auxiliary module detachably connectable to the first dialysis module. The first dialysis module can include a dialyzer, a blood circuit, a dialysate circuit, and a sorbent. The auxiliary module can include an ultrafiltrate collector operably couplable to the dialysate circuit for removing excess fluid therefrom.

A deaerating device set allows a priming circuit to be deaerated fully automatically using a deaerating unit and a priming control unit, a priming liquid container and preferably a priming pump or a priming compressor. A blood pump is operated in a pulsatile manner during the pumping of a priming fluid.

A heart lung machine (HLM) includes a control area net-work (CAN); a pump; a number of sensors; and a control assembly, all communicatively coupled to the CAN. The control assembly includes a control display device and a processing unit, which is configured to fa-cilitate a semi-automatic safety check. To do so, the processing unit is configured to provide an HLM system safety check user interface (UI) on a display device, the HLM system safety check UI including a rep-resentation of each sensor; activate a sensor; present, via the UI, an in-dication of the activation of the sensor; determine an alarm state of the sensor; present a representation of the alarm state of the sensor on the control display device; present a safety check result of the sensor via the UI; and save a safety check result corresponding to the sensor.

The present invention relates to a detection arrangement, comprising: an actuation element, which is designed to be moved back and forth between at least one first and one second position; a fastening portion, which is designed such that the actuation element can be brought into contact with a tube; a spring element, which interacts with the actuation element such that the spring element exerts a force on the actuation element in the direction of the second position; a retaining element, which interacts with the actuation element such that the actuation element can be moved into the first position by means of the retaining element; and a control element, which is designed to detect at least one parameter of the actuation element and/or of the retaining element and evaluate same so that the control element, on the basis of this evaluation, provides information about the condition of the detection arrangement.